To see the other types of publications on this topic, follow the link: Sorbenty.
Journal articles on the topic 'Sorbenty'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Sorbenty.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Budriūtė, Eglė, Vaidotas Vaišis, and Donatas Mikulskis. "INVESTIGATION OF HEMP WATER SORPTION CAPACITY / NATŪRALIŲ ORGANINIŲ KANAPIŲ SPALIŲ SORBENTO NAFTOS PRODUKTAMS ŠALINTI TYRIMAS." Mokslas – Lietuvos ateitis 8, no. 4 (October 24, 2016): 397–402. http://dx.doi.org/10.3846/mla.2016.947.
Full textAbstract:
Effective clean-up of oil spills due to their negative environmental and economic impact is of capital importance. Clean-up of oil by sorption is considered one of the most desirable choices, because oil can be completely removed without causing any secondary pollution. Natural organic sorbents had been investigated and developed to control oil products‘ spills. Plant biomass is a renewable resource which can be converted into various materials and energy. Hemp (USO-31), as a textile industry waste, was used as an oil product sorbent material. The present study examines hemp sorption capacity of water using different fractions of hemp raw material to be used in oil/water mixtures. The experimental research revealed that water sorption capacity depends on fraction size and sorption time. The results of water sorption capacity of 2.5 and 5.0 mm after 1440 min were 4.74 and 4.67 g water/g dry sorbent, respectively. Labai svarbu efektyviai likviduoti išsiliejusius naftos produktus dėl jų neigiamo poveikio aplinkai ir ekonomikai. Naftos produktų valymo metodas pasitelkiant sorbentus yra laikomas vienu iš geriausių pasirinkimų, nes produktai yra absorbuojami sorbentų, nesukeliant jokios antrinės taršos. Natūralūs organiniai sorbentai buvo tiriami ir tobulinami, siekiant kontroliuoti naftos produktų išsiliejimus. Augalų biomasė yra atsinaujinantis išteklis, kuris gali būti naudojamas įvairioms medžiagoms ir energijai išgauti. Kanapių spaliai (USO-31), tekstilės pramonės atlieka, buvo tiriami kaip naftos produktų sorbentas. Buvo išnagrinėta kanapių vandens sorbcija naudojant įvairias šios medžiagos frakcijas. Eksperimentinis tyrimas parodė, kad vandens sorbcija priklauso nuo frakcijos dydžio ir sorbcijos laiko. Tyrimų metu buvo nustatyta vandens sorbcijos geba – 4,74 ir 4,67 g vandens/g sauso sorbento 2,5 ir 5,0 mm pavyzdžiams po 1440 min atitinkamai.
2
Drozd, Magdalena, and Jolanta Warchoł. "Adsorbents apply for Cr(VI) removal from aqueous solutions." Journal of Civil Engineering, Environment and Architecture XXX, no. 60 (4/13) (December 30, 2013): 5–19. http://dx.doi.org/10.7862/rb.2013.54.
Full text
3
Pieńczak, Jolanta, and Jolanta Warchoł. "Absorbents for disposal B (III) from aqueous solutions." Journal of Civil Engineering, Environment and Architecture XXX, no. 60 (4/13) (December 30, 2013): 139–56. http://dx.doi.org/10.7862/rb.2013.64.
Full text
4
Jaroń, Artur. "Sorbenty smektytowe przeznaczone do usuwania H2S z atmosfer korozyjnych." OCHRONA PRZED KOROZJĄ 1, no. 5 (May 5, 2016): 38–43. http://dx.doi.org/10.15199/40.2016.5.7.
Full text
5
Oszczak-Nowińska, Agata. "Alginiany jako sorbenty w procesach usuwania radionuklidów z rozcieńczonych roztworów wodnych." PRZEMYSŁ CHEMICZNY 1, no. 10 (October 5, 2019): 157–59. http://dx.doi.org/10.15199/62.2019.10.26.
Full text
6
Fejes, Jonas, Anne Zetterberg, Stefan Andersson, and Anders Svenson. "Sorbents for Oil and Chemical Spills: Development of Methodology To Assess Environmental Impact." International Oil Spill Conference Proceedings 1999, no. 1 (March 1, 1999): 1215–18. http://dx.doi.org/10.7901/2169-3358-1999-1-1215.
Full textAbstract:
ABSTRACT Today it is impossible for a sorbent user to choose a sorbent with the lowest or acceptable environmental impact for his application—especially if he wants to know the total impact from production to disposal of the sorbent. The aim is to develop a method that gives information about the environmental impact from all phases of a sorbent's life cycle. The first experiments within the project are being performed to evaluate the assessment of ecotoxicological tests on leachate from pure sorbent. The tests are: Microtox (bacteria), algae, potworm, plant, crustacean, and zebra fish. Further the influence of different leaching parameters has been studied with regards to their toxic response with Microtox. This has been accomplished by using a fractional factorial design and from the results a methodology for leaching pure sorbents has been developed. Some of the tests are still being performed whereas it is too early to make an evaluation of all of the results, but as expected some tests like Microtox, algae, and zebra fish rank the sorbents differently after toxicity. The plant tests did not show any toxicity. The multivariate study of the influence of leaching parameters on the toxic response shows that the influential parameters differ with different sorbents. The parameters showed both individual and interaction effects.
7
Abdullah, E. A., A. H. Abdullah, Z. Zainal, M. Z. Hussein, and T. K. Ban. "Bismuth Basic Nitrate as a Novel Adsorbent for Azo Dye Removal." E-Journal of Chemistry 9, no. 4 (2012): 1885–96. http://dx.doi.org/10.1155/2012/617050.
Full textAbstract:
Bismuth basic nitrate (BBN) and its TiO2-Ag modified sorbent, PTBA were successfully synthesized via a precipitation method. The structural characteristics of prepared sorbents were determined through different analytical techniques. The potential use of prepared sorbents for organic compounds' removal was evaluated using Methyl Orange and Sunset Yellow dyes as model pollutants in aqueous solutions. The experimental results showed that the presence of TiO2and Ag particles during the crystal growth of bismuth basic nitrate has an effect on the crystal structure, point of zero charge (pHpzc), pore volume and diameter. The lower binding energy of Ti 2p core level peak indicates the octahedral coordination of TiO2particles on the PTBA surface. The alteration of hydrophilic-hydrophobic characteristics of sorbent's surface improves the adsorptive performance of the modified sorbent and provides an efficient route for organic contaminants' removal from aqueous solutions.
8
I V, Starostina, Nikitina A E, Kosukhin M M, and Starostina Yu.L. "Efficient carbonaceous sorbent based on the waste sludge of oil extraction industry for purifying wastewater from petroleum products." International Journal of Engineering & Technology 7, no. 2.23 (April 20, 2018): 266. http://dx.doi.org/10.14419/ijet.v7i2.23.11928.
Full textAbstract:
The opportunity to use the oil extraction industry waste kieselghur sludge as a raw stuff for carbonaceous sorbent for purifying wastewater from petroleum and petroleum products has been researched. It has been demonstrated that the thermal modification of the waste sludge results in oxidation of organic matter and the formation of a carbon layer on the surface of kieselghur (diatomite), as well as the formation of the obtained material’s porous structure. The maximum values of oil-absorption and petroleum-absorption of the carbonaceous sorbent samples, obtained at various temperatures of the initial waste product treatment, have been determined. The highest petroleum saturation (2 g/g) is observed in the first 5 minutes of the sorbent’s contact with the pollutant and is characteristic of the material, obtained at temperature 500°С. The highest oil saturation (3.6 g/g) is shown by the sorbent, obtained at temperature 450°С. This value was achieved after 30 minutes of the sorbent’s contact with oil. The efficiency of clarifying water-oil emulsion with the concentration 1.5 g/dm3 by using carbonaceous sorbents of various thermal pre-history has been determined. The highest degree of emulsion clarification – 91% was achieved at using the sorbent, obtained as a result of the waste sludge modification at temperature 450°С.
9
Flaherty, L. Michael, and Julie M. Jordan. "SORBENT PERFORMANCE STUDY FOR CRUDE AND REFINED PETROLEUM PRODUCTS." International Oil Spill Conference Proceedings 1989, no. 1 (February 1, 1989): 155–60. http://dx.doi.org/10.7901/2169-3358-1989-1-155.
Full textAbstract:
ABSTRACT This paper presents information on the use of sorbents to contain and clean up crude oil and refined petroleum product spills on water and land. Sorbent literature sources have been reviewed, and information has been consolidated under contract to the U. S. Environmental Protection Agency (EPA). This paper addresses types of sorbents, sorbent performance criteria, tests performed in previous studies, guidance on sorbent application, and profiles of generic types of organic, inorganic, and synthetic sorbents. It also considers, to a lesser degree, the use of sorbents on hazardous substances.
10
Nurutdinov, Azamat, and Klara Yamaletdinova. "Evaluation of sorbents’ oil capacity properties at various temperatures." Bulletin of scientific research results, no. 1-2 (July 17, 2017): 16–22. http://dx.doi.org/10.20295/2223-9987-2017-1-2-16-22.
Full textAbstract:
Objective: The oil capacity properties of the sorbents used for oil collection are qualitatively estimated at various temperatures. One of the factors securing sustained rail transport development is taking measures to prevent and eliminate the accidental spillages of dangerous goods including oil and oil products. Such accidents occur causing significant environmental contamination. Methods: Using sorbents for containment and elimination of such accidents has a good track record. Their properties have not been, however, sufficiently investigated at various temperatures. The sorbents’ oil capacity is determined by the standard gravimetric method using the difference between the weight of a sorbent impregnated with oil product and that of a pure sorbent based on 1 g (kg) of a pure sorbent. Results: Oil viscosity grows as the temperature goes down. The research findings show higher sorbents’ oil capacity figures caused by a changed oil recovery mechanism due to its higher viscosity: at a low or moderate viscosity, oil sorbs inside the sorbent volume, whereas at a high viscosity (above 200 mm2/s) sorbent surface adhesion occurs. Practical importance: A qualitative analysis of sorbents is important for ensuring environmental safety.
11
Rozelle, Peter L., Sarma V. Pisupati, and Alan W. Scaroni. "Prediction of Sorbent Performance in a Circulating Fluidized Bed Boiler Based on Petrographic Properties." Journal of Engineering for Gas Turbines and Power 129, no. 2 (August 8, 2006): 565–71. http://dx.doi.org/10.1115/1.2431388.
Full textAbstract:
A method for prediction of sorbent consumption is presented here and has been developed based on plant operating data for a boiler in which several limestone and dolostone products were tested under similar firing conditions. The method considers the characteristic partitioning of calcium and sulfur between the flyash and bottom ash stream for the boiler, the feed particle size distribution of the sorbent, and petrographic properties of the sorbents. The predictions of sorbent usage were compared to plant operating data for five sorbents, of two distinct petrographic types. The plant operating data used featured full load operation. The five sorbents tested were all from Pennsylvania, and each contained greater than 40wt.% CaO. In four of the five cases, the predicted sorbent usage was within 10wt.% of the average full load sorbent usage by the boiler.
12
Yu, Ching Tsung, Han Wen Cheng, and Wei Chin Chen. "High Temperature CO2 Capture by Regenerable Calcium Aluminates Carbonates Sorbents." Advanced Materials Research 779-780 (September 2013): 56–59. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.56.
Full textAbstract:
The calcium aluminates carbonates are prepared as mediumhigh temperature CO2 sorbents. The sorbent exhibited excellent performance with 53 wt% capacity and 99% stability in TGA test for 15 h. However, using the sorbent in a fixed-bed reactor, it was found that the stability rapidly decreased to about 35% after 10 cycles. Hence, development of regeneration methods for reusing this spent sorbents is critical to economic consideration toward CO2 capture technology. The calcium aluminates carbonates sorbent makes up layered structure including cations formation (Ca2+, Al3+) and lamella anions (CO32-, OH), which can be re-constructed under aqueous conditions. Aqueous hydrolysis provides an efficient route to reactive sorbent. The results showed that CO2 capacity could be recovered to around 50 wt% with 98% stability in TGA test for 15 h for spent sorbents. The reactive mechanism of sorbent is worthy to further discussing.
13
Mohd Daud, Farah Diana, Nur Asyikin Kosen, Mudrikah Sofia Mahmud, Norshahida Sariffudin, and Hafizah Hanim Mohd Zaki. "Preparation of CaO-SiO2 Adsorbent for Potential CO2 Capture via Dry Mixing Method." Materials Science Forum 1025 (March 2021): 343–48. http://dx.doi.org/10.4028/www.scientific.net/msf.1025.343.
Full textAbstract:
Calcium-looping technology is defined as one of the most desirable methods of carbon capture, utilization and storage (CCUS). However, because of sintering, rapid deactivation of CaO-sorbents is currently a major barrier to this technology. The stability of calcium based sorbent may be enhance by incorporating them with inert support materials such as MgO, Al2O2, ZrO2 and SiO2. For this study, calcium based sorbent has been incorporate with silica obtained from rice husk ash. CaO-SiO2 sorbents are prepared using physical dry mixing method which is much simpler compared to other available methods. The prepared CaO-SiO2 sorbents were then characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). New crystalline phase, larnite (Ca2SiO4) was detected in XRD patterns and this phase possess good chemical durability and may help to prevent sintering effect of calcium based sorbents and enhance their cyclic capability. CaO-SiO2 sorbent calcined at 700 oC with different grinding times have highest intensity of XRD peak at (104) with element of calcite. Sorbents with different weight composition of CaCO3-RHA were observed to have different surface morphology. SEM images of the sorbent (90wt% CaCO3-RHA) before calcination showed bigger particle size with irregular shape and more porosity. Then, SEM analysis was conducted for samples with different grinding times after calcination. CaO-SiO2 sorbents with 20minutes grinding time exhibited small size of particles with some porosity. Besides that, the particles are well distributed without agglomeration occured. The CaO-SiO2 sorbent calcined at 700 oC sorbents were tested for 20 consecutive carbonation and calcination cycles using Thermogravimetric Analysis (TGA). CaO-SiO2 sorbent treated with 700 oC calcination temperature and 20 minutes of grinding shows better cyclic CO2 sorption capacity.
14
Kostoev, R. K., D. S. Tochiev, E. I. Nilkho, Z. N. Sultigova, R. D. Archakova, B. A. Temirkhanov, and L. Ya Uzhakhova. "Application of the mercury porosimetry method in the analysis of sorption materials." Fine Chemical Technologies 15, no. 1 (March 21, 2020): 76–83. http://dx.doi.org/10.32362/2410-6593-2020-15-1-76-83.
Full textAbstract:
Objectives. This study aims to establish the available porosity of a sorbent based on carbonized rice husk and investigate its sorption properties for oil and oil products.Methods. A rice-husk-based sorbent carbonized at 400°С for 30 min was selected as the subject. The porosity of this sorbent is analyzed with the help of mercury porosimeters, the Pascal 140 EVO and Pascal 240 EVO. The sorption properties of the sorbent are also studied when cleaning water containing oil and oil products.Results. The test sample is a bulk porous material with a pore volume of 0.015 cm/g; porosity higher than 15% was found, and the pore size distribution is shown. Studies were conducted on the sorption of oil and oil products as well as the possibility of using the aforementioned sorbent as a filtering material in the purification of water containing oil products. We investigated the sorption processes under dynamic and static conditions. The methodology for measuring the porous structure of solid materials on the mercury porosimeter, Pascal 140 EVO, was examined. The texture characteristics of the sorbent’s porous structure were determined, which is primarily the total volume of pores, the values of the specific surface area, and the volume of the microspores and mesopores.Conclusions. The materials studied can be used as sorbents with a developed porous structure for purification of water with dissolved and emulsified petroleum products.
15
Butusova, O. A. "Design and Properties of Magnetically Controlled Sorbents." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 5 (April 11, 2021): 515–19. http://dx.doi.org/10.17762/turcomat.v12i5.1045.
Full textAbstract:
In this work, the main parameters and advantages of magnetically controlled sorbents are considered. A large surface of nanodispersed magnetically controlled sorbents adsorbs large amounts of toxins, therefore, the consumption of magnetically controlled sorbents in each operation is insignificant. The ability to quickly replace the spent magnetically controlled sorbents in the detoxification apparatus with a new portion of magnetically controlled sorbents increases the reliability, simplicity and ease of use of the method under consideration. The small thickness of the sorbent layer and the availability of the sorbent surface provide almost instantaneous establishment of equilibrium concentrations, which significantly reduces the required processing time for the biofluid and increases the productivity of the purification process.
16
Kušnierová, Maria, Vladimír Šepelák, and Ol'ga Šestinová. "Bio-chemical methods in wasteprocessing." Polish Journal of Chemical Technology 11, no. 1 (January 1, 2009): 24–27. http://dx.doi.org/10.2478/v10026-009-0007-0.
Full textAbstract:
Bio-chemical methods in wasteprocessing The mineral biotechnologies, the domain of which is primary raw material processing, are increasingly diversifying into some metallurgical areas. The presented results of the research carried out with metallurgical wastes from aluminium production, lead waste remaking and desulphurization zinc-ferrite-based sorbents regeneration prove the possibility of the use of bio-chemical methods. The results obtained and the proposed technologies applying bio-chemical processes enable a complex processing and use of waste sludge from aluminium production and the use of wastes from matte-based copper production for the production of hematite pigments. The use of microorganisms in the desulphurization sorbent regeneration processes allows to increase sorbent's efficiency and its repeated recycling.
17
Włodarczyk, Renata, Michał Wichliński, and Zbigniew Bis. "Impact of porosity on calcination and sulfation of calcium sorbents." E3S Web of Conferences 49 (2018): 00131. http://dx.doi.org/10.1051/e3sconf/20184900131.
Full textAbstract:
The focus of the study was on sorbents with a grain size of 125-250 μm. Examinations of reactivity were conducted in a reaction furnace under conditions required for reactivity testing of calcium sorbents. The tests were performed according to standard calcium sorbent tests (FW). Computation of reactivity indices and capacity index were performed according to formulae contained in previous publications [1]. The process of simultaneous calcination and sulfation of calcium sorbents is controlled by the speed of chemical processes and diffusion. Therefore, surface properties of sorbents, including porosity, play an important role in the flue gas desulphurization process. Examinations of sorbent porosity were performed using a mercury porosimeter. Based on porosimetric analysis, open porosity, the total surface area of sorbents and mean diameter of pores were evaluated for the sorbents studied.
18
Maina, Irene Wangari, Veronica Obuseng, and Florence Nareetsile. "Use ofMoringa oleifera(Moringa) Seed Pods andSclerocarya birrea(Morula) Nut Shells for Removal of Heavy Metals from Wastewater and Borehole Water." Journal of Chemistry 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/9312952.
Full textAbstract:
Use of nonedible seed pods ofMoringa oleifera(Moringa) tree and nutshells ofSclerocarya birrea(Morula) tree for removal of selected metal ions (lead, cadmium, copper, manganese, iron, zinc, and magnesium) from wastewater and borehole water samples was investigated. Removal parameters such as contact time, pH, temperature, particle size, sorbent dose, and initial metal concentration were optimized. Determination of residual metal ions after employing sorbent was done using flame atomic absorption spectroscopy (FAAS). Using 200 ng synthetic metal ion mixture in 50 mL of water sample, the optimized parameters for Moringa seed pods were 60 min contact time, 1.0 g of sorbent dose, pH 8, 100 μm sorbent particle size, and extraction temp 35°C. While using Morula nutshells, the optimized conditions were 120 min contact time, 2.0 g sorbent dose, pH 8, 100 μm sorbent particle size, and extraction temp of 35°C. The removal efficiency of acid treated sorbents was compared to that of untreated sorbents and it was found to be higher for acid treated sorbents. These nonedible plant parts for Morula and Moringa plants are proposed as a cheap, simple, and an effective alternative for purification of water contaminated with heavy metals.
19
Wichliński, Michał, and Renata Włodarczyk. "Assessment of the Impact of Modification of Calcium Sorbents and the Possibility of Their Use in Desulfurization for Oxy-Fuel Combustion Process." Minerals 11, no. 11 (November 19, 2021): 1284. http://dx.doi.org/10.3390/min11111284.
Full textAbstract:
The paper describes the possibilities of simple and effective modification of calcium sorbents used for flue gas desulfurization with a size between of 125–250 µm. The additives to the sorbents in the amount of 0.5% and 1.0% were inorganic sodium and lithium compounds. The research on the reactivity of sorbents was analyzed in the process of simultaneous calcination and sulfation at the temperature of 850 °C. The type of Na+ or Li+ cations and the inorganic salt anions have an influence on the modification of calcium sorbents in order to improve the efficiency of the calcination and sulfation process. Modification of calcium sorbents by adding inorganic sodium and lithium compounds, regardless of the amount, changes the reactivity coefficient RI [mol/mol] and the absolute sorption coefficient CI [g S/kg sorbent]. In the case of inorganic sodium salt (Additive 1), regardless of the amount of modifier added, there was a visible improvement in the reactivity of the sorbent: 1.0% of the additive caused an increase in the RI coefficient in relation to the raw sorbent by over 14%, and in the case of the CI coefficient by over 24%. Additional research was the analysis of the limestone behavior mechanism during the simultaneous calcination and sulfation (SCS) process under conditions of elevated temperature and with variable CO2 and O2 contents in the flue gas. The behavior of sorbents with a size distribution of 125–250 µm was assessed on the basis of the change in mass of the samples by determining the reactivity coefficient RI, [mol/mol] and the absolute sorption coefficient CI, [g S/kg sorbent]. Using the mercury porosimetry technique, the change in sorbent porosity in the subsequent stages of the simultaneous calcination and sulfation process was investigated. The process was carried out in the temperature range corresponding to the oxy-combustion (i.e., from 850 °C to 1000 °C).
20
Shurko, N. O., and T. V. Danysh. "Investigation of sorption capacity of dye-affinity sorbents in the process of purification of factor VIII coagulation." Infusion & Chemotherapy, no. 3.1 (October 11, 2020): 84–85. http://dx.doi.org/10.32902/2663-0338-2020-3.1-70.
Full textAbstract:
Background. Chromatographic methods, in particular affinity chromatography, are the most effective in obtaining highly purified preparations of plasma proteins. The active triazine and vinyl sulfone dyes are the special group of ligands for affinity chromatograph. We found that the dye-affinity sorbents bind non-target to factor VIII (FVIII) proteins in the previous stages of the study. The sorption capacity of the affinity sorbent is defined as the maximum amount of sample (protein) that can bind to the column under certain conditions. Determining the adsorption limit or limiting capacity of the sorbent makes it possible to identify the feasibility of its use to extract a certain type of protein.
Objective. To study the sorption capacity of various dye-ligand affinity sorbents in the process of purification of FVIII.
Materials and methods. We used next sorbents: Diasorb-Procion Blue HB, Diasorb-Procion Gelb M4R and Diasorb-Procion Blue MXR. The cryoprecipitate was initial material. The total protein concentration was determined by the Bradford method, the activity of factors VIII – one-stage clotting method.
Results and discussion. Sorption of non-target proteins and FVIII activity were investigated after preparation of a number of dilutions of the initial solution of cryoprecipitate. Different concentrations of protein were applied per 1 cm3 of sorbent to select the optimal concentration and do not to oversaturate the column: I – 19.74±0.20 mg of protein/ml; II – 7.94±0.05 mg of protein/ml; III – 3.97±0.05 mg of protein/ml; IV – 1.96±0.04 mg of protein/ml. The maximum sorption capacity among the studied sorbents was 14.62±0.04 mg of protein / 1 cm3 for of sorbent Diasorb-Procion Blue HB. It was found that to achieve maximum purification of FVIII (highest specific activity), the optimal concentration of protein to 1 ml of sorbent should be in the range of 4-8 mg of protein / 1 cm3 of sorbent. The highest degree of purification for these sorbents was 19.65 times at an initial protein concentration of about 4 mg protein/ml (p≤0.01).
Conclusions. The sorption capacity of sorbents was calculated. It was demonstrated that the maximum sorption capacity is approximately 15 (14.62±0.04) mg of protein / 1 cm3 of sorbent.
21
Bok-Badura, Joanna, Agata Jakóbik-Kolon, Alicja Kazek-Kęsik, and Krzysztof Karoń. "Hybrid Pectin-Based Sorbents for Cesium Ion Removal." Materials 13, no. 9 (May 7, 2020): 2160. http://dx.doi.org/10.3390/ma13092160.
Full textAbstract:
In this paper, beads-shaped hybrid sorbents composed of pectin and Prussian blue were prepared. Various ratios of pectin and Prussian blue in hybrid sorbents were tested. Obtained sorbents had high and roughly constant sorption capacity in a broad pH range (4–10), in which also the swelling index and stability of sorbents were satisfactory. The preliminary sorption studies proved that almost 100% of cesium removal efficiency may be achieved by using the proper sorbent dose. The sorption capacity of the hybrid sorbent with a 1:1 ratio of pectin to Prussian blue equaled q = 36.5 ± 0.8 mg/g (dose 3 g/L, pH = 6, temp. = 22 ± 1 °C, t = 24 h). The obtained results showed that the prepared hybrid pectin-based sorbents are promising for cesium ions removal.
22
Sanna Angotzi, Marco, Valentina Mameli, Alessandra Fantasia, Claudio Cara, Fausto Secci, Stefano Enzo, Marianna Gerina, and Carla Cannas. "As(III, V) Uptake from Nanostructured Iron Oxides and Oxyhydroxides: The Complex Interplay between Sorbent Surface Chemistry and Arsenic Equilibria." Nanomaterials 12, no. 3 (January 20, 2022): 326. http://dx.doi.org/10.3390/nano12030326.
Full textAbstract:
Iron oxides/oxyhydroxides, namely maghemite, iron oxide-silica composite, akaganeite, and ferrihydrite, are studied for AsV and AsIII removal from water in the pH range 2–8. All sorbents were characterized for their structural, morphological, textural, and surface charge properties. The same experimental conditions for the batch tests permitted a direct comparison among the sorbents, particularly between the oxyhydroxides, known to be among the most promising As-removers but hardly compared in the literature. The tests revealed akaganeite to perform better in the whole pH range for AsV (max 89 mg g−1 at pH0 3) but to be also efficient toward AsIII (max 91 mg g−1 at pH0 3–8), for which the best sorbent was ferrihydrite (max 144 mg g−1 at pH0 8). Moreover, the study of the sorbents’ surface chemistry under contact with arsenic and arsenic-free solutions allowed the understanding of its role in the arsenic uptake through electrophoretic light scattering and pH measurements. Indeed, the sorbent’s ability to modify the starting pH was a crucial step in determining the removal of performances. The AsV initial concentration, contact time, ionic strength, and presence of competitors were also studied for akaganeite, the most promising remover, at pH0 3 and 8 to deepen the uptake mechanism.
23
Shishkin, Andrei, Viktor Mironov, Vjaceslavs Lapkovskis, Juris Treijs, and Aleksandr Korjakins. "Ferromagnetic Sorbents for Collection and Utilization of Oil Products." Key Engineering Materials 604 (March 2014): 122–25. http://dx.doi.org/10.4028/www.scientific.net/kem.604.122.
Full textAbstract:
This Current paper reports the research conducted at Riga Technical University and Rezekne Higher Education Institution on the development of sorbent material, which is made of closed hollow microspheres possesses ferromagnetic properties, with a large specific surface. A review and comparison of existing sorbents for oil products collection are presented. The manufacturing process of proposed sorbent are described. The structure and morphology of obtained composite sorbent are discussed. It was found that proposed sorbent allows an efficient and safe way for surface water cleaning contaminated by spilled oil products. In particular, it shows a storing effect on a thin oil film (1-2 mm). Adsorption capacity to motor oil is investigated and compared with other magnetic sorbents on metal powders base. Newly proposed sorbent demonstrates a significantly higher adsorption capacity comparing to iron powders. Sorbent saturated by spilled oil can be evacuated by means of magnetic (or electromagnetic) captures.
24
Brochocka, Agnieszka, Aleksandra Nowak, and Paweł Kozikowski. "Influence of Carbon Sorbent Quantity on Breakthrough Time in Absorbent Filters for Antismog Half Mask Application." Materials 15, no. 2 (January 13, 2022): 584. http://dx.doi.org/10.3390/ma15020584.
Full textAbstract:
In this article, we present polymer non-woven fabrics with the addition of carbon sorbents being tested to estimate the breakthrough time and efficient protection against vapors present in smog. For this purpose, three substances were selected, which constitute an inhalation hazard and are smog components: cyclohexane, toluene, and sulfur dioxide. It was demonstrated that an increased quantity of carbon sorbent in polymeric filters significantly prolongs the breakthrough time. However, high sorbent quantities may increase the filter surface mass and air flow resistance. To optimize the protective parameters with functionality, a compromise between the two has to be found. By comparing the breakthrough times for different carbon sorbent quantities, the optimal filter composition was elaborated. The analyzed non-woven fabrics were manufactured by the melt-blown process and filled with ball-milled carbon sorbents supplied directly into the fabric blowing nozzle. Both protective performance and textural properties were analyzed for two commercially available carbon sorbents. Furthermore, it was proven that high values of sorbent-specific surface area translates directly into greater filter performance.
25
Goñez-Rodríguez, Leroy, Alexander Johs, Kenneth A. Lowe, Kimberly E. Carter, Frank E. Löffler, and Melanie A. Mayes. "Evaluation of engineered sorbents for the sorption of mercury from contaminated bank soils: a column study." Environmental Science and Pollution Research 28, no. 18 (January 9, 2021): 22651–63. http://dx.doi.org/10.1007/s11356-020-12073-4.
Full textAbstract:
AbstractAs a global environmental pollutant, mercury (Hg) threatens our water resources and presents a substantial risk to human health. The rate and extent of immobilization of Hg2+ (hereafter, Hg) on engineered sorbents (Thiol-SAMMS®, pine biochar, SediMite™, Organoclay™ PM-199, and quartz sand as a control) was evaluated using flow-through column experiments. The effectiveness of the sorbents was based on (1) the percentage of Hg removed in relation to the total amount of Hg passing the sorbent column, and (2) the rate of Hg uptake compared to the nonreactive tracer bromide (Br−). All sorbents removed Hg to a certain extent, but none of the sorbents removed all the Hg introduced to the columns. Thiol-SAMMS showed the highest mean percentage of Hg removed (87% ± 2.9%), followed by Organoclay PM-199 (71% ± 0.4%), pine biochar (57% ± 22.3%), SediMite (61% ± 0.8%), and the control quartz sand (11% ± 5.6%). Thiol-SAMMS was the only sorbent to exhibit retardation of Hg in comparison to the conservative tracer Br−. For the remaining sorbents, Br− along with low concentrations of Hg were eluted within the first 3 pore volumes, indicating limited retardation of Hg. Overall, removal of Hg by sorbents was substantial, suggesting that sorbents might be suitable for deployment in contaminated environments. High concentrations of DOM leaching from the soil columns likely influenced the speciation of Hg and inhibited sorption to the sorbents. Incomplete removal of Hg by any sorbent suggests that additional optimization is needed to increase efficiency.
26
Raina, Renata, and Patricia Hall. "Field Evaluation of Solid Sorbents for Ambient Air Sampling of Pesticides." Air, Soil and Water Research 3 (January 2010): ASWR.S5924. http://dx.doi.org/10.4137/aswr.s5924.
Full textAbstract:
Seven solid sorbents including Amberlite® XAD-2 and XAD-4, Tenax-TA®, Anasorb-747, Chromosorb 102, 108, and 750 were evaluated for the collection of the gas phase fraction of pesticides under field conditions at an agricultural site, Bratt's Lake, SK, located in the Canadian prairies. The polyurethane foam (PUF)/sorbent cartridge consists of two PUF layers which sandwich the solid sorbent and each layer was analyzed separately to determine which portion of the PUF/solid sorbent retained the pesticides and the extent of breakthrough. The pesticides that had high detection frequency throughout the study and ambient air concentrations well above MDL were triallate, trifluralin, ethalfluralin, and chlorpyrifos. All sorbents had improved collection efficiency as compared to a standard 7.6 cm PUF and the improvement varied with each pesticide. The most effective sorbents for trapping gas phase fraction of pesticides were XAD-2, XAD-4, Tenax-TA, and Chromosorb 108. The only sorbent not recommended for use is Chromosorb 750. For selected sampling periods when ambient concentrations were above detection limits a number of other organochlorine and organophosphorus pesticides also showed more efficient collection with PUF/solid sorbent cartridges as compared to PUF cartridge. Shorter sample collection periods of 4-days improved detection frequency of pesticides.
27
Ryu, Do-Yeong, Seongbin Jo, Tae-Young Kim, Soo-Yeong In, Jin-Hyeok Woo, Jong-Heon Lee, Ho-Jin Chae, et al. "CO2 Sorption and Regeneration Properties of K2CO3/Al2O3-Based Sorbent at High Pressure and Moderate Temperature." Applied Sciences 12, no. 6 (March 15, 2022): 2989. http://dx.doi.org/10.3390/app12062989.
Full textAbstract:
In this study, the CO2 sorption mechanisms and regeneration properties of alumina-based sorbent using K2CO3 loading under high-pressure and moderate temperature conditions were examined. To investigate the mechanism of CO2 sorption, a zirconium-based sorbent was compared with an alumina-based sorbent. The CO2 capture capacities of the PAI10, 20, 30, and 40 were 32.3, 63.0, 95.4, and 124.5 mg CO2/g sorbent, respectively. To investigate the CO2 sorption mechanism of an alumina-based sorbent, we performed XRD, TG/DTG, and FTIR analyses after CO2 sorption in the presence of 10 vol% CO2 and H2O each at 200 °C and 20 atm. For PAI10–40 sorbents, KHCO3 and KAl(CO3)(OH)2 phases were observed by TG/DTG and FTIR analysis. For PAI-x sorbents, it was confirmed that the captured CO2 is desorbed completely at a temperature below 400 °C at 20 atm.
28
Gusev, Grigoriy I., Andrey A. Gushchin, Vladimir I. Grinevich, Tatyana V. Izvekova, and Dmitriy V. Fillipov. "PHYSICAL AND CHEMICAL PROPERTIES OF SORBENTS USED FOR WASTEWATER PURIFICATION FROM OIL PRODUCTS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 7 (June 18, 2018): 136. http://dx.doi.org/10.6060/ivkkt.20186107.5686.
Full textAbstract:
The work is devoted to the study of the physico-chemical and adsorption properties of synthetic and natural sorbents contaminated with oil products. The parameters such as sorption capacity for petroleum products, water adsorption and moisture content, bulk density, as well as parameters characterizing the sorption equilibrium in the surface layers (distribution coefficients, maximum adsorption values, Henry constants, Gibbs energy changes, adsorption coefficients and filling degrees) were determined. Adsorption isotherms for all sorbents are almost identical in character with a pronounced linear region in the region of low concentrations of oil products and correspond to isotherms of monomolecular adsorption. The sorption capacity of the sorbents under study varies from 10 to 50 mg of oil products per 1 g of sorbent. The maximum sorption capacity among the sorbents studied the Ol-Ex Hard possesses. This sorbent belongs to sorbents of the silicate group and Ol-Ex 82, based on polyurethane. The lowest moisture content is also characteristic for silicate sorbents and does not exceed 0.5 % of their mass. The maximum moisture adsorption is typical for sorbents of SONET Sorb and MGS Sorb. It was revealed that the surface of Ol-Ex Hard is almost completely filled with oil (q → 1), while for shungite the surface will be filled only by 13%. The most effective for trapping oil products should be considered the sorbent Ol-Ex Hard, for which the highest values of adsorption parameters are characteristic.Forcitation:Gusev G.I., Gushchin A.A., Filippov D.V., Grinevich V.I., Izvekova T.V. Physical and chemical properties of sorbents used for wastewater purification from oil products. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 7. P. 136-142
29
Nazarov, A. M., I. O. Tuktarova, A. A. Kulagin, L. Kh Araslanova, and V. A. Archipenko. "Adsorption treatment of sewage sludge from heavy metals." Nanotechnologies in Construction A Scientific Internet-Journal 12, no. 5 (October 30, 2020): 285–91. http://dx.doi.org/10.15828/2075-8545-2020-12-5-285-291.
Full textAbstract:
Introduction. Because of urban development the volume of municipal and industrial wastewater are growing. Along with them the amount of sewage sludge (SS) also increases. Millions of tons of SS are currently accumulated on the territory of the Russian Federation and contain various pollutants, including heavy metals (HM). In this regard, the search for effective methods of SS treatment from HM is an urgent problem. The main methods of SS treatment are drying, dehydration, thermal methods, UV and microwave wave treatment. These kinds of disinfection eliminates many pathogenic microorganisms, but they are quite expensive and not effective against HM. Reagent methods include SS disinfection with quicklime (CaO). However, decontamination requires large doses (up to 30%) and it is also ineffective against HM. Humic-mineral reagent are more effective, they are based on crushed caustobiolites, their cleaning capacity from HM is 19–87%. Methods and materials. The authors have previously shown the effectiveness of wastewater treatment from HM using sorbents based on dolomite, quartzite, and waste from mining and processing plants. Therefore, a method for SS treatment from HM using sorbents based on dolomite, humates, and CS containing CaCO3 and humic compounds was proposed. In this regard, a method was proposed for SS treatment from HM using three types of sorbents based on: 1) waste of thermal power plants (TPP) – conditioned sludge (CS) containing CaCO3 up to 68% and humic compounds up to 12% – sorbent 1 (S1); 2) dolomite – Mg and Ca carbonate in a composition with sodium humate (25%)– sorbent 2 (S2); 3) modified dolomite with sodium humate (1%) – sorbent 3 (S3). Results and discussion. In laboratory experiments, the cleaning capacity of SS was studied using a dolomite-based sorbent modified with humate (1%). In field tests, a decrease in the concentration of HM in SS was studied with the use of sorbents based on CS and the complex sorbent dolomite-humate (75:25). The cleaning capacity of SS from HM increases in the series: sorbents based on waste from TPP – CS containing CaCO3 and humates (cleaning capacity E = 4.8–48.6% for dried SS and 29.3–53.3% for dehydrated SS) < sorbent based on a composition of dolomite with humate (E = 65.1–92.1% for dried and 56.6–89.4% for dehydrated SS) < a dolomite-based sorbent modified with humate (E = 90.8–99.9%). Conclusions. The maximum cleaning capacity is shown by a dolomite-based sorbent coated with a nano- and micro- sized layer of sodium humate.
30
Xu, Hong Yan, Mei Sheng Liang, and Chun Hu Li. "Study on the Characterization of Zinc Ferrite High-Temperature Coal Gas Desulfurization Agent." Advanced Materials Research 129-131 (August 2010): 1233–37. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.1233.
Full textAbstract:
Using ferric nitrate, zinc nitrate, ammonia liquor and binder as main raw materials, five kinds of zinc ferrite sorbents were prepared by the co-precipitation method. The effects of the different binders on the structure and texture of zinc ferrite sorbents were investigated. The morphology, composite structure, pore properties, and mechanical strength were studied by using modern several physicochemical techniques such as powder X-ray diffraction (XRD), scanning electronic microscopy (SEM), strength tester and gas absorption meter. It is showed that spinel structure ZnFe2O4 is not affected by different binders，and its particle diameter is in micron leve1. The spinel structures are present in the sorbents that have been calcined at 750 0C.. The sorbent employed kaolinite as binder is the best one of the five types of sorbents for desulfurization, while the one employed diatomite is the worst.Different binders modify the textural properties, modifying consequently the sorbent reactivity. Furthermore, the reactivity and sulfur capacity of sorbents are increasing with an increase in the pore volume.
31
Bagheri Hosseinabadi, Majid, Shahnaz Timoori, and Ali Faghihi Zarandi. "Functionalized graphene-trimethoxyphenyl silane for toluene removal from workplace air by sorbent gas extraction method." Analytical Methods in Environmental Chemistry Journal 2, no. 2 (July 22, 2019): 45–54. http://dx.doi.org/10.24200/amecj.v2.i2.63.
Full textAbstract:
A new synthesized sorbent based on functionalizing graphene with N-Phenyl-3-aminopropyl trimethoxy silane (G-PhAPTMS, C12H21NO3Si), was developed as a novel sorbent for removal of toluene from air by sorbent gas extraction procedure (SGEP). By proposed method, the removal efficiency of G-PhAPTMS was compared with other sorbents such as activated carbon (AC), graphene (G) and graphene oxide (GO). The standard gas of toluene generated in pure air with different concentrations and the effects of parameters such as temperature (10-90 °C), flow rate (50-500 mL min-1) and the amount of sorbent (2-30 mg) were investigated. According to the results, increasing the flow rate and temperature had negative effects on the removal efficiency of all sorbents. The highest removal efficiency of G-PhAPTMS was obtained up to 35 °C and less than 250 mL min-1 (>95%). In optimized conditions, the amount of sorbent for toluene removal was achieved more than 10 mg of G-PhAPTMS.
32
Kudaibergenov, Kenes, Marat Tulepov, Yerdos Ongarbayev, and Zulkhair Mansurov. "Efficiency of Agricultural Wastes for the Removal of Gasoline from Water." Applied Mechanics and Materials 751 (April 2015): 82–85. http://dx.doi.org/10.4028/www.scientific.net/amm.751.82.
Full textAbstract:
In this work, we report polyurethane foam, sunflower husk and rice husk ash prepared via a thermal treatment process used as oil sorbents for oil spill cleanup. The oil sorbent was studied on the basis of microstructure and morphology using optical digital microscopy and scanning electron microscopy (SEM). The results of the SEM and optical microscopy studies strongly indicate that thermal treatment is a suitable method to improve structure of husk particles regarding porosity compared to virgin samples. The dependence of the sorption capacity of the sorbents on the amount of sorbent, sorption time and the thickness of the oil film, as well as the number of cycles of the sorbents were investigated.
33
KALJUKOVA, Eugenia N., and Elena V. KISLOVA. "STUDYOFSORPTIONPROCESS OF CATIONS OF MANGANESE(II) THE DOLOMITE AND SHUNGITE." Urban construction and architecture 3, no. 4S (December 15, 2013): 36–38. http://dx.doi.org/10.17673/vestnik.2013.s4.10.
Full textAbstract:
The sorption properties of natural sorbents (dolomite and shungite) in relation to the cations of manganese.The degree of extraction of metal cations of model solutions of the original and modified natural sorbents. Of the two studied sorbents more high degree of extraction of manganese ions removal from solutions is obtained for the natural sorbent - dolomite.
34
Robalds, A., M. Klavins, and A. Zicmanis. "Peat as Sorbent for Cu2+ and Cr3+ Ions." Latvian Journal of Chemistry 50, no. 1-2 (January 1, 2011): 149–58. http://dx.doi.org/10.2478/v10161-011-0060-x.
Full textAbstract:
Peat as Sorbent for Cu2+ and Cr3+ Ions Heavy metals as trace elements can often be found in industrial waste waters, and their discharge to the environment is a significant threat due to their acute toxicity to the aquatic and terrestrial life. The common methods used for removal of toxic metals and trace elements from the municipal and industrial waste waters are based on their adsorption onto insoluble compounds - sorbents. Synthetic sorbents usually are quite expensive; therefore, as a prospective approach to the metal removal, the use of a natural sorbent - peat - was tested. Peat as sorbent was proved to have a relatively high sorption capacity in respect to the studied metal ions, it can be used batchwise and in a dynamic regime and is a relatively robust and reliable sorbent regarding pH, the ionic strength, and the amounts of sorbed metal.
35
Ma, Xiaotong, Yingjie Li, Yi Qian, and Zeyan Wang. "A Carbide Slag-Based, Ca12Al14O33-Stabilized Sorbent Prepared by the Hydrothermal Template Method Enabling Efficient CO2 Capture." Energies 12, no. 13 (July 8, 2019): 2617. http://dx.doi.org/10.3390/en12132617.
Full textAbstract:
Calcium looping is a promising technology to capture CO2 from the process of coal-fired power generation and gasification of coal/biomass for hydrogen production. The decay of CO2 capture activities of calcium-based sorbents is one of the main problems holding back the development of the technology. Taking carbide slag as a main raw material and Ca12Al14O33 as a support, highly active CO2 sorbents were prepared using the hydrothermal template method in this work. The effects of support ratio, cycle number, and reaction conditions were evaluated. The results show that Ca12Al14O33 generated effectively improves the cyclic stability of CO2 capture by synthetic sorbents. When the Al2O3 addition is 5%, or the Ca12Al14O33 content is 10%, the synthetic sorbent possesses the highest cyclic CO2 capture performance. Under harsh calcination conditions, the CO2 capture capacity of the synthetic sorbent after 30 cycles is 0.29 g/g, which is 80% higher than that of carbide slag. The superiority of the synthetic sorbent on the CO2 capture kinetics mainly reflects at the diffusion-controlled stage. The cumulative pore volume of the synthetic sorbent within the range of 10–100 nm is 2.4 times as high as that of calcined carbide slag. The structure of the synthetic sorbent reduces the CO2 diffusion resistance, and thus leads to better CO2 capture performance and reaction rate.
36
Burlyaev, V. V., E. V. Burlyaeva, A. I. Nikolaev, and B. V. Peshnev. "FUNCTIONAL MODELING OF CARBON SORBENTS SYNTHESIS CONTROL." Fine Chemical Technologies 14, no. 1 (February 28, 2019): 39–46. http://dx.doi.org/10.32362/2410-6593-2019-14-1-39-46.
Full textAbstract:
The formalized model of carbon sorbent synthesis control based on the methodology for functional modeling is constructed. The correlations between the directions of use and the properties of carbon sorbents are revealed. The characteristics that are essential regardless of the direction of use of the sorbent, in particular, sorption properties and strength are identified. The technologies based on the gas-phase method of obtaining carbon material are considered, the analysis of individual stages of the process of obtaining carbon sorbents is carried out. The analysis of the influence of the technological parameters of the synthesis on the properties of sorbents is carried out. On the basis of the established relationships, a functional model has been built that provides a hierarchically ordered, structured, visual description of the management of carbon sorbent synthesis. The simulation is performed “from top to bottom” from the most general description to the detail. The resulting model is a set of interrelated graphical diagrams. At the initial stage, the synthesis of carbon sorbent is considered as a single process, the input parameters of which are hydrocarbon gas, the activating agent and the material form factor, the output - carbon sorbent, and the control parameters are the requirements for strength and sorption properties. Then the synthesis process is decomposed. The control processes (analysis of raw material properties and matrix selection), technological processes (raw material preparation) and mixed processes are distinguished as a result of decomposition. The model includes a consistent description of the technological parameters selection (temperature, gas flow and time) for both stages of the synthesis process. The model is the base for information support providing for the production of carbon sorbents with the required properties.
37
Mejri, R., Y. S. Peregudov, and E. M. Gorbunova. "Technology for obtaining modified oil sorbents." Proceedings of the Voronezh State University of Engineering Technologies 82, no. 4 (January 20, 2021): 247–53. http://dx.doi.org/10.20914/2310-1202-2020-4-247-253.
Full textAbstract:
Expediency of using natural glauconite material as a basis for the production of an environmentally friendly sorbent with hydrophobic and magnetic properties for liquidating oil and oil products spills mechanically and using a magnetic field has been substantiated and experimentally proved. Fractional, elemental and oxide compositions of the original mineral have been studied. The structure of glauconite fraction 0.045-0.1 mm has been investigated by transmission electron microscopy. It was found that the surface of the sample particles is heterogeneous with a large number of pores and cracks. Based on the experimental data, the optimal conditions for the production and use of powder and granular sorbents based on glauconite with specified properties were determined, at which a high degree of recovery (more than 90%) of oil with water and hard surfaces. The optimum temperature for obtaining a magnetic oil sorbent is 400 °C. The doses of stearic acid and iron (III) oxide were established at 5 wt. %, which provide hydrophobicity and magnetic properties to the synthesized sorbent. A high degree of oil (97%) and oil (98%) recovery when using a sorbent is achieved at a ratio of 1: 10 to sorbate. To eliminate oil and oil product spills, it is proposed to use granular ferromagnetic sorbents obtained by introducing carboxymethyl cellulose into the modified glauconite composition. oil and oil products granular sorbent increases in comparison with the original mineral by 1.2–2.2 times. Technological schemes for obtaining ferromagnetic hydrophobic and granular sorbents based on glauconite for collecting oil and oil products from water and solid surfaces have been developed. The synthesized sorbents are characterized by high efficiency, low cost, and environmental friendliness.
38
Chung, Seungjoon, Jaclyn Gandee, Makram T. Suidan, and Albert D. Venosa. "EFFECT OF SAND PARTICLE SIZE, OIL CONTAMINATION, AND WATER TABLE LEVEL ON THE EFFECTIVENESS OF SORBENTS IN WICKING OIL FROM CONTAMINATED WETLAND." International Oil Spill Conference Proceedings 2008, no. 1 (May 1, 2008): 537–39. http://dx.doi.org/10.7901/2169-3358-2008-1-537.
Full textAbstract:
ABSTRACT Oil spill cleanup in wetlands is problematic because of the limited remediation techniques that can be applied in such environments. The use of sorbents to clean up oil spills presents many advantages due to simplicity of approach and the inexpensive nature of these materials. Furthermore, sorbents can be used not only as wicking agents but also as microbial media that mediate hydrocarbon biodegradation. Once a sorbent is applied to an impacted wetland, it absorbs the contaminating oil. It retains the oil for a sufficient length of time to allow biodegradation of hydrocarbons by indigenous bacteria under aerobic conditions. In addition, plant-derived organic sorbents are biodegradable, thus leaving no permanent residue. Ammoniated bagasse is one of the biodegradable organic sorbents that contain nitrogen as a nutrient needed to support the activity of oil degrading bacteria. In this study, we evaluated the effectiveness of sorbents in wicking oil from the subsurface of oil-contaminated sediments under various conditions. Several microcosms were prepared to simulate saturated wetland environments. Glass cylinders, 10 cm in diameter and 10 cm in height, enclosed these microcosms. Each microcosm was layered in the following sequence (from the bottom to the top): a clean sand layer, an oiled-sand layer, and an overlying sorbent layer. Sand, sorbent, and water were sterilized prior to use to ensure that no biodegradation occurs during the experiment. The different conditions included: 2 particle sizes of sand (20 × 30 and 60 × 80 U.S. Mesh), 2 levels of oil contamination (25% and 75% of saturation), 3 water levels (at the oiled-layer/clean sand interface, at the oiled-layer/sorbent-layer interface, and at the sorbent-layer/air interface), and 2 levels of sorbent (presence or absence). Oil wicking experiments were performed in airtight microcosms for a period of 3 months. At the termination of an experiment, each layer of the microcosms was separated and samples were taken. Samples were extracted with dichloromethane and quantified by gas chromatography/mass spectrometry (GC-MS). Mass balances in each microcosm were established in terms of total petroleum hydrocarbons (TPH). TPH includes alkanes (C10-C35); pristane; phytane; hopane; 2-, 3-, and 4-ring PAHs; and pyrogenic PAHs (5- & 6-rings). The TPH change in each layer from time zero to 3 months was used to determine the effectiveness of the sorbent under each condition tested.
39
Marušáková, Daniela, Pavel Kůs, Lorant Szatmary, and Iveta Adéla Prokůpková. "Influence of Boric Acid Solution and Gamma Irradiation on Selective Sorbents." Defect and Diffusion Forum 405 (November 2020): 193–98. http://dx.doi.org/10.4028/www.scientific.net/ddf.405.193.
Full textAbstract:
We tested stability of 43 selective sorbents, covering the widest range of functional groups, efficiency of sorption, method of production, and which are theoretically useful for sorption of cesium, strontium, cobalt, arsenic and actinoids. We present 3 of them: A = TiO2, B = Al2O3 and C = MxH(TiO)4(SiO4)3 . z H2O. In first testing, sorbents were exposed to the model solution of boric acid for 168 hours, in which they were mixed in a closed container with a rotator. After the exposure, sorbent solutions were filtered and analysed by spectroscopic techniques (Infrared Spectroscopy (IR), Raman Spectroscopy (RS) and newly by Scanning Electron Microscopy (SEM), combined with Energy Dispersive Spectroscopy (EDS)). Exposed spectra were compared with spectra of new, non-exposed sorbents. In second testing, sorbents were exposed to gamma radiation for 12 days with total dose 666 ± 43 kGy, produced by cobalt bomb and analysed by same techniques. The aim of our testing was to find out how sorbents behave in model boric acid solution and what effect has the gamma radiation on sorbent spectra and to analyse sorbents by SEM with EDX.
40
Valentukeviciene, Marina, and Ramune Zurauskiene. "Investigating the Effectiveness of Recycled Agricultural and Cement Manufacturing Waste Materials Used in Oil Sorption." Materials 15, no. 1 (December 28, 2021): 218. http://dx.doi.org/10.3390/ma15010218.
Full textAbstract:
This research investigates how sorbents made from recycled waste materials affect the properties of water used to remove residues flushed from oil tanks transported by rail. The mineral sorbent was added to water following the flushing process. Water temperatures were maintained at 21 °C and 70 °C for a contact period of 30 min. The experiments demonstrated that: when the sorbent is active, turbidity removal efficiency was about 64%; color removal efficiency of 56% was obtained; and total iron concentration removal was approximately 68%. The effect of the characteristics of the materials on the adsorption capacity was evaluated using the removed amount of oil per one gram of every sorbent. It was found that straw sorbent oil adsorption capacity was up to 33 mg/g, peat sorbent 37 mg/g, and mineral sorbent 1.83 mg/g. The following were also measured during the experiment: temperature, pH, chemical oxygen usage, total iron concentrations, suspended matter, and oil concentrations. The findings show that recycled sorbents obtained from waste materials are environmentally sustainable and can be reused to treat water that has been used to flush oil transported in rail tanks.
41
Kachalkin, Maxim N., and Alexander V. Voronin. "Preparation of sorbents for solid-phase extraction of salicylic acid from aqueous solutions." Aspirantskiy Vestnik Povolzhiya 21, no. 5-6 (May 15, 2021): 16–22. http://dx.doi.org/10.55531/2072-2354.2021.21.3.16-22.
Full textAbstract:
Salicylic acid and its derivatives are widely used in medicine and pharmacy as antipyretic, antirheumatic, anti-inflammatory and analgesic drugs for external and internal use. The development of methods for the quantitation of salicylic acid in multicomponent samples using selective methods of sample preparation is an important problem in quality drug control. The aim of the study was to obtain sorbents based on ethyl cellulose for solid-phase extraction of salicylic acid from aqueous solutions. As a result of the study, a method for obtaining a sorbent for solid-phase salicylic acid from aqueous solutions was proposed. The IR spectroscopy of the obtained sorbent samples did not establish significant structural differences between ethylcellulose and the obtained sorbents. Optimal concentrations of ethylcellulose and salicylic acid solutions in the reaction mixture for obtaining the sorbent with a maximum value of sorption capacity of 93.5 g/g of sorbent were revealed. The method for the quantitation of salicylic acid from aqueous solutions with the use of the obtained sorbent was proposed. Metrological estimation of salicylic acid quantitation with the help of the obtained sorbent for solid-phase extraction was carried out.
42
Qin, Hao Chen, Lian Wei Liu, Wei Ping Si, Li Ping Chang, Wei Ren Bao, and Li Na Han. "Desulfurization and Regeneration Performance of Sorbent Prepared by Subcritical Water Impregnation." Materials Science Forum 743-744 (January 2013): 443–48. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.443.
Full textAbstract:
A series of metal oxides sorbents supported on γ-Al2O3 were directly prepared by subcritical water impregnation (SCWI) method using an autoclave reactor. The effects of active components, preparation pressure, temperature, and time on the desulfurization activity of sorbents in hot coal-based gases at mid-temperature were investigated. The samples were characterized by X-ray diffraction (XRD), nitrogen adsorption and atomic absorption spectrophotometer (AAS). The results showed that Mn-based sorbent loaded on γ-Al2O3 by SCWI presented a good desulfurization performance. The optimal preparation parameters of sorbent were the temperature of 350 °C, the pressure of 18.9 MPa, impregnation time of 30 min, the precursor solution concentration of 0.287 mol/L and the volume of 100 ml, respectively. The Mn/γ-Al2O3 sorbent prepared under the optimal conditions presented a good desulfurization precision and regeneration performance. After regeneration, the mechanical strengths of the sorbents were higher than that of raw support and the breakthrough time at the desulfurization efficiency of above 99% was not obviously decreased.
43
Rahman, A. S. A., A. N. A. Yahaya, N. A. Khalil, A. N. S. Fizal, M. A. S. A’zim, M. S. Hossain, and M. Zulkifli. "Effect of magnetite on alginate-based hydrogel beads composite bio-sorbent for copper removal." IOP Conference Series: Materials Science and Engineering 1195, no. 1 (October 1, 2021): 012052. http://dx.doi.org/10.1088/1757-899x/1195/1/012052.
Full textAbstract:
Abstract A composite magnetite alginate-based bio-sorbent in hydrogel beads form as adsorbent for copper ion removal was prepared through this work. Two types of composite bio-sorbents which are cellulose-magnetite-alginate (CeMA) and chitosan-magnetite-alginate (CMA) hydrogel beads were synthesized by the physical cross-linking method. Ratios of magnetite iron oxide 0, 0.1, and 1.0 were used during the synthesis of bio-sorbents to observe the effect of magnetite ratios on copper ion removals. Based on the performance of bio-sorbents on copper removals, 24.6% of the highest percentage copper removal was achieved by CMA with a magnetite ratio of 0.1 at an adsorption equilibrium time of 24 hours and initial concentration of 100 mg/L. In addition, through this work, magnetite embedded bio-sorbent with the simple synthesized method was done by utilizing the capability of alginate to instantaneously form hydrogel beads upon addition into calcium chloride (Ca2+). Therefore, this work proves the potential of magnetite embedded in alginate-based composite bio-sorbent hydrogel beads for heavy metal industrial wastewater.
44
Arrhenius, Karine, Haleh Bohlen, Oliver Büker, Iris de Krom, Dita Heikens, and Janneke van Wijk. "Hydrogen Purity Analysis: Suitability of Sorbent Tubes for Trapping Hydrocarbons, Halogenated Hydrocarbons and Sulphur Compounds." Applied Sciences 10, no. 1 (December 23, 2019): 120. http://dx.doi.org/10.3390/app10010120.
Full textAbstract:
The ISO 14687-2 standard sets requirements for the purity of the hydrogen that is delivered at refuelling stations. These specifications cover a wide range of impurities and include challenging measurements, mainly due to the very low levels of the required detection limits and the need for “total” measurements (total hydrocarbons, total sulphur compounds, halogenated compounds). Most of the compounds belonging to the species are organic. Thermal desorption often coupled with gas chromatography is a common speciation method used to determine the content of organic impurities. However, no existing sorbent tubes are sufficiently universal to trap all possible impurities; depending on the sorbents and the sampling volume, some compounds may irreversibly adsorb or may break through. It is therefore necessary to evaluate sorbents for the compounds targeted at the level required. In this study, the suitability of sorbent tubes for trapping organic impurities in hydrogen was investigated. Suitable sorbents were selected based on a literature review of suitable sorbent materials. Short-term stability studies for compounds among hydrocarbons, halogenated compounds and sulphur compounds on the selected sorbents have then been performed for storage periods of two weeks since this is the period typically required to complete the collection, transport and analysis of hydrogen samples. The study clearly shows that the method is promising for total species, even through the results show that not all of the compounds belonging to the three total species to be analysed when performing hydrogen purity analysis can be quantified on one unique sorbent. A multibed sorbent consisting of Tenax TA (weak), Carboxen 1003 (medium), Carbograph 1 (strong) is shown to be a versatile sorbent suitable for the three “total species”; only a few compounds from each family would need to be analysed using other analytical methods. This method proposed here for total species will not only provide a sum of concentrations, but also an identification of which compound(s) is/are actually present in the hydrogen.
45
Dolgikh, V. T., V. A. Likholobov, V. V. Moroz, L. G. P'yanova, T. I. Dolgikh, A. V. Ershov, and M. S. Drozdetskaya. "Prospects of the Use of New Carbon Sorbents with Antimicrobial Properties in the Intensive Care Medicine." General Reanimatology 15, no. 1 (March 1, 2019): 54–69. http://dx.doi.org/10.15360/1813-9779-2019-1-54-69.
Full textAbstract:
The purpose is to study antibacterial and antimycotic properties of produced granular carbon sorbents. Material and methods. A VNIITU-1 carbon sorbent was used as a starting material, which was modified with polyvinylpyrrolidone and lactic and glycolic acids oligomers. Microbiological bench tests were carried out to determine the antibacterial and antimycotic activity of these granulated carbon hemosorbents. Antibacterial properties of sorbents were studied in relation to pathogenic and conditionally pathogenic microorganisms: Staphylococcus aureus, Pseudomonas aeroginosa, Klebsiella pneumonia, Escherichia coli, Streptococcus agalactiae as well as their mixtures: mixture No. 1 — S. aureus and E. coli; mixture No. 2 — S. aureus and P. aeruginosa. Results. Presented data demonstrate that the modified VNIITU-1 exhibits significant antibacterial and antimycotic activity against most of the studied microorganisms compared to original sorbent. Conclusion. Modified sorbents as antimicrobial and detoxifying drugs may further be employed in treatment of obstetrical-gynecological and surgical diseases. The carbon sorbents are promising materials for medicine, as they expand the potential of sorption therapy in clinical practice.
46
Sabadash, V. V., and Ya M. Gumnitsky. "Investigation of the process of fe (III) adsorption by methods of multidimensional cluster analysis." Chemistry, Technology and Application of Substances 4, no. 2 (November 1, 2021): 145–50. http://dx.doi.org/10.23939/ctas2021.02.145.
Full textAbstract:
The results of the study of the adsorption capacity of a number of sorbents of natural and synthetic origin with respect to iron ions have been clustered. The sorption capacity of the following sorbents was studied: natural zeolite of the Sokyrnytsia deposit, synthetic sorbent based on the ash of Doborotvir heat power plant, Al2O3, SiO2, as well as some types of soils: sandy soil, black soil and clay. Equations describing the regularities of adsorption processes depending on the type of sorbent are obtained. According to the obtained dendrograms of the adsorption process, two main clusters of sorbents were identified. The statistical parameters of the process and the significance of the obtained results are calculated. The coefficient of determination of experimental data was 0.87– 0.99, the standard deviation was 0.017–0.026.
47
Birgėlaitė, Rūta, Vaidotas Valskys, and Gytautas Ignatavičius. "USE OF SAPROPEL FOR REMOVAL OF HEAVY METALS FROM SOLUTION / SILICINIO SAPROPELIO NAUDOJIMAS SUNKIESIEMS METALAMS ŠALINTI IŠ TIRPALO." Mokslas – Lietuvos ateitis 8, no. 4 (October 24, 2016): 388–96. http://dx.doi.org/10.3846/mla.2016.946.
Full textAbstract:
Abundant resources, natural and organic material – sapropel containing a multitude of different chemical elements has a great potential to be used in different areas, but for now these rich resources are not widely used because of different chemical composition of sapropel research is very few. The article deals with silicon sapropel as a sorbent is able to absorb heavy metals from the solution depending on the time and the concentration of heavy metals in the solution. The sorption studies of heavy metal concentrations were measured in dry sapropel sample using Thermo Scientific Niton® XL2 series of X-ray fluorescence spectrometer (XPS). Also, the heavy metal concentrations in solution were measured by atomic absorption spectrometer AAnalyst 200 (AAS). Get sapropel sorption capacity results are analyzed through absorption capacity curves and Matala ion removal efficiency curves. Also, comparing the results with the initial concentration of heavy metals sapropel and foreign authors used sorbent properties. After thorough research sapropel sorption capacity can be added to the knowledge of sapropel properties utilization. Gausūs natūralios organinės medžiagos – sapropelio, kurio sudėtyje yra daug įvairių cheminių elementų, – ištekliai turi didelį potencialą būti panaudoti įvairiose srityse. Šiuo metu šie gausūs ištekliai nėra plačiai naudojami, nes atlikta labai nedaug sapropelio įvairios cheminės sudėties tyrimų. Straipsnyje nagrinėjama silicinio sapropelio kaip sorbento geba sorbuoti sunkiuosius metalus iš tirpalo, priklausomai nuo laiko ir sunkiųjų metalų koncentracijos tirpale. Atlikus sorbcijos tyrimus, sunkiųjų metalų koncentracijos matuotos sausame sapropelio mėginyje, naudojant Thermo Scientific Niton® XL2 serijos rentgeno spindulių fluorescencinį spektrometrą (RFS). Taip pat sunkiųjų metalų koncentracijos matuotos tirpale naudojant atominės absorbcijos spektrometrą AAnalyst 200 (AAS). AAS tyrimus atliko atestuota UAB „Vilniaus vandenys“ geriamojo vandens laboratorija. Gauti sapropelio sorbcinės talpos tyrimų rezultatai analizuojami sudarant adsorbcinės talpos kreives bei metalo jonų pašalinimo efektyvumo kreives. Taip pat rezultatai buvo palyginti su pradine sunkiųjų metalų koncentracija sapropelyje ir užsienio autorių naudotų sorbentų sorbcinėmis savybėmis. Atlikus tyrimus gautas 97,4 % sorbento-sapropelio pašalinimo efektyvumas sorbuojant šviną ir 97,24 % sorbuojant cinką. Tyrimų rezultatų paklaida patikrinta lyginant išmatuotą sorbento talpą su apskaičiuotąja. Švino adsorbcinės talpos paklaida siekia 4–9 mg/kg, o cinko 1–14 mg/kg.
48
Vakili, Shaghayegh, Gholam Ali Koohmareh, and Akbar Malekpour. "Bipyridine containing poly(amic-acid)s: Synthesis, characterization, and sorption behavior toward the Ni (II) ions." High Performance Polymers 34, no. 4 (January 20, 2022): 377–87. http://dx.doi.org/10.1177/09540083211063389.
Full textAbstract:
New poly(amic-acid)s sorbents, bearing bipyridine chelating groups, were synthesized by reaction of benzophenonetetracarboxylic dianhydride (BTDA) with different percentages of 4,6-bis(4-aminophenyl)-2,2′-bipyridine (BAPB), and 1,4-phenylene diamine (PPD) and were characterized by FTIR and 1HNMR spectroscopies. Because of the imidization of these poly(amic-acid)s after about 10% weight loss, their thermal stability was raised to about 500°C. The glass transition temperatures of these polymers were in the range of 154–166°C. The sorption of Ni(II) by these sorbents from the aqueous solutions was investigated by varying different parameters such as the contact time, pH, and sorbent dosage. Results indicated that the optimum efficiencies of these sorbents toward Ni(II) were at 25°C, at pH = 4 and after about 75 min. According to the Langmuir equation, the maximum uptake capacity ( qm) of PAA30/70 as a best sorbent for nickel was 14.66 mg.g−1. The modeling results confirmed the pseudo-second-order sorption for the metal ion. The morphology of these sorbents before and after sorption of Ni(II) was investigated using Scanning Electron Microscopy and the results confirmed the porous structure of these sorbents. [Formula: see text]
49
Dolgikh, V. T., L. G. Pyanova, E. V. Naumkina, A. V. Lavrenov, E. V. Matushchenko, and N. V. Kornienko. "Antibacterial Activity of Modified Carbon Sorbents, Prospective for Application." Antibiotics and Chemotherapy 65, no. 7-8 (November 21, 2020): 3–7. http://dx.doi.org/10.37489/0235-2990-2020-65-7-8-3-7.
Full textAbstract:
The aim of the work is to study the antibacterial and antimycotic properties of carbon sorbents modified with biologically active substances in relation to pathogens of purulent-inflammatory diseases. Material and methods. The activity of modifier solutions and modified samples of carbon sorbents was studied in relation to test strains of opportunistic microorganisms in comparison with the initial sample of carbon sorbent. A suspension with a known content of microbial cells was prepared from test strains of microorganisms; it was incubated in wells with test samples for 48 hours. The survival of microorganisms was determined by quantitative inoculation from each well of the sample and microorganism mixture at regular intervals of incubation on Petri dishes with simple agar nutrient, then the number of viable microbial cells in the test mixture was counted. Results. Studies have shown high antibacterial and antimycotic activity of modified carbon sorbents. The best result in comparison with the initial sample was demonstrated by a carbon sorbent modified with lactic acid oligomers and immobilized lysozyme. Studies have shown the promise of using modified carbon sorbent samples for the application therapy in bacterial infections.
50
Badora, Aleksandra. "Polymeric Forms of Al13and Silicon Compounds as Unconventional Binding Agents for some Toxic Metals in Soils." Mineralogia 47, no. 1-4 (December 1, 2016): 29–37. http://dx.doi.org/10.1515/mipo-2017-0006.
Full textAbstract:
Abstract Own studies and literature data allowed for the evaluation of sorbents in view of the general verification criteria, which are necessary for any sorbent to be applied with no harm to the environment. Polymeric forms of Al13and Si compounds are examples of mineral sorbents that influence metals' toxicity in the environment.