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Littérature scientifique sur le sujet « Water - Purification - Adsorption »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 6 septembre 2023

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Articles de revues sur le sujet "Water - Purification - Adsorption"

Dali Ioseliani, Neli Kalabegashvili, Gulnara Balarjishvili, Liana Samkharadze, and Nino Nonikashvili. "Water purification from zinc ions using expanded perlite." World Journal of Advanced Research and Reviews 19, no. 1 (July 30, 2023): 214–20. http://dx.doi.org/10.30574/wjarr.2023.19.1.1278.

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Adsorptive capacities of expanded perlite, prepared on the basis of natural mineral of Georgia – perlite, in the process of aqueous solution purification from Zn (II) ions, have been first studied in the work. The dependencies of adsorption degree and volume capacity on adsorbent dosage, contact time, adsorbate concentration and pH of solution medium have been studied. Experiments have been conducted under dynamic conditions. Optimum conditions of Zn(II) ion adsorption have been established. Maximal efficiency of adsorption degree under these conditions was equal to 93,6, while volume capacity

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Malovanyy, Myroslav, Kateryna Petrushka, and Ihor Petrushka. "Improvement of Adsorption-Ion-Exchange Processes for Waste and Mine Water Purification." Chemistry & Chemical Technology 13, no. 3 (July 15, 2019): 372–76. http://dx.doi.org/10.23939/chcht13.03.372.

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Mekala, Mallaiah, Bhoopal Neerudi, Padma Rao Are, Raviteja Surakasi, G. Manikandan, Vighneswara Rao Kakara, and Aditya Abhaykumar Dhumal. "Water Removal from an Ethanol-Water Mixture at Azeotropic Condition by Adsorption Technique." Adsorption Science & Technology 2022 (April 14, 2022): 1–10. http://dx.doi.org/10.1155/2022/8374471.

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The separation of ethanol-water mixture is employed in the present work to produce pure ethanol, the present investigation on the separation of water from the ethanol to achieve pure ethanol by adsorption process. The different parameters like quantity of adsorbent, flow rate of feed mixture, and different adsorbents which are zeolite 3A, zeolite 4A, and silica gel are selected to study purification of ethanol by adsorption. The effect of process parameter for purification is also recorded and studied to evaluate the performance of adsorption equipment and adsorbent. The experiments are conduc

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Chelu, Mariana, Adina Magdalena Musuc, Monica Popa, and Jose M. Calderon Moreno. "Chitosan Hydrogels for Water Purification Applications." Gels 9, no. 8 (August 17, 2023): 664. http://dx.doi.org/10.3390/gels9080664.

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Chitosan-based hydrogels have gained significant attention for their potential applications in water treatment and purification due to their remarkable properties such as bioavailability, biocompatibility, biodegradability, environmental friendliness, high pollutants adsorption capacity, and water adsorption capacity. This article comprehensively reviews recent advances in chitosan-based hydrogel materials for water purification applications. The synthesis methods, structural properties, and water purification performance of chitosan-based hydrogels are critically analyzed. The incorporation o

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Nikolaeva, L. A., and A. A. Adzhigitova. "Purification of Industrial Waste Water from Copper Ions Using Ash Waste." Voprosy sovremennoj nauki i praktiki. Universitet imeni V.I. Vernadskogo, no. 1(79) (2021): 060–68. http://dx.doi.org/10.17277/voprosy.2021.01.pp.060-068.

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The necessity of studying organic waste as a secondary energy resource for a waste-heat boiler with further use of the resulting ash for the adsorption of heavy metal ions is shown. The adsorptive purification of waste water from copper ions by ash of organic waste is considered. The chemical composition and technological characteristics of organic biomass, the characteristics of the boiler and the toxicity of the resulting ash have been determined. The chemical composition of the ash was obtained. The isotherm of adsorption in static conditions and the output curve of adsorption in dynamic co

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Nikolaeva, L. A., and N. E. Aikenova. "The Mechanism of Adsorptive Purification of Industrial Waste Water from Phenols (the Example of Aktobe Oil Refining LLP)." Voprosy sovremennoj nauki i praktiki. Universitet imeni V.I. Vernadskogo, no. 4(78) (2020): 028–37. http://dx.doi.org/10.17277/voprosy.2020.04.pp.028-037.

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The mechanism of adsorptive purification of oil refining wastewater from phenols by modified carbonate sludge of chemical water treatment (CWT) has been studied. Phenols in wastewater are extremely toxic substances. In the legislative order, the sanitary and hygienic standards set the maximum permissible concentration (MPC) of phenol in water, which is 0.001 mg/dm3. A process scheme of adsorption purification of wastewater from phenols with modified carbonate sludge, which is a large-tonnage waste from the power industry, is proposed. An adsorption filter has been designed for effective additi

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Kumari, K. S. Beena, and S. Mary Paulin. "ECOFRIENDLY ADSORBENT FROM FOOD WASTE FOR WATER PURIFICATION." International Journal of Research -GRANTHAALAYAH 9, no. 9 (September 30, 2021): 40–50. http://dx.doi.org/10.29121/granthaalayah.v9.i9.2021.4230.

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Egg shell, which is a waste material emerging out in large quantities from poultries, homes and restaurants, may be used as a good adsorbent for heavy metals. Different types of eggshells were used in this study for the adsorption of a major pollutant such as iron from surface water. Effect of CaCO3 content in the egg shell, particle size, contact time, temperature and shaking on adsorption were also studied. The adsorption isotherms fitted by the Langmuir model revealed that the adsorption of iron by eggshell samples was monolayer adsorption.

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Farkhod, Yusupov, Nuriddinova Dilfuza, Yakhsheva Yulduz, Yusupov Sukhrob, and Mamanazarov Murodali. "Import-mixing Sorbents for Purification of Waste Production Water of Gas Processing Industry for re-use." International Journal of Mechanics 15 (June 29, 2021): 95–101. http://dx.doi.org/10.46300/9104.2021.15.10.

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Currently, there are a variety of methods and technologies for water purification. One of them is the adsorption method. Today the adsorption method is widely used in the water treatment industry. The aim of the research is to create an effective multifunctional filtering composition suitable for complex physical and chemical water purification. For this, a cation exchanger developed on the basis of local raw materials, activated alumina and other local materials was used. The adsorption properties of the cation exchanger and aluminum oxide in the composition of this filter have been studied.

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Atamanova, O., E. I. Tikhomirova, A. A. Podoksenov, A. S. Glubokaya, and Z. A. Simonova. "Purification of water environments from heavy metals ions pollution." IOP Conference Series: Earth and Environmental Science 1061, no. 1 (July 1, 2022): 012027. http://dx.doi.org/10.1088/1755-1315/1061/1/012027.

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Abstract Modern methods for extracting heavy metal ions from industrial wastewater are quite diverse. The purpose of the study was to develop and justify new technologies for purification of aqueous media, including adsorption purification, from heavy metal ions (by the example of Ni2+ and Cd2+ ions). Laboratory studies have established that the degree of adsorption extraction of Ni2+ ions by the sorption material from bentonite modified with carbon nanotubes and fired at a temperature of 550 °C increases by 13-14 % due to its activation with 18 % HCl solution and 38 % CaCl2 solution, and the

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Agirman, Betul M. "Water Purification and Adsorption Ability of Pumice." International Journal of High School Research 3, no. 4 (September 30, 2021): 5–10. http://dx.doi.org/10.36838/v3i4.2.

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Thèses sur le sujet "Water - Purification - Adsorption"

Stocking, Kristin 1959. "Adsorption of MS-2 bacteriophage to silica." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277019.

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Batch and column experiments were performed to investigate the adsorption of bacteriophage MS-2 to silica at pH 5. Linear isotherm analysis of batch experiment data gave partition coefficient (KP) estimates of 270 cm³/g and 580 cm³/g for 4°C and 24°C, respectively. Breakthrough-type column experiments indicated that sorption and desorption were slow, as evidenced by a slow approach to breakthrough and tailing of the desorption limb. A non-equilibrium advection-dispersion model with all adsorption sites on the silica assumed to be kinetically controlled was used to model the column data. The mo

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Imwer, Serge Mapan. "Adsorption of perfluorinated water contaminants on Agave sisalana activated carbon fibre." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/867.

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Thesis submitted in fulfilment of the requirements for the degree Magister Technologiae: Chemical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology 2014<br>An awareness campaign on the harmful effects of Perfluorinated compounds (PFCs), especially Perfluorooctanoic acid (PFOA) and Perfluorooctane sulfonate (PFOS) has been conducted to inform the general public about the impact of these organic compounds on hu-mans and biota. These compounds have been shown to be potential carcinogens, as indi-cated by the United States Environmental Protection Agency (USE

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Tan, Lo 1963. "The effects of activated carbon adsorption and ozonation on trihalomethane speciation." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276953.

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Two surface water sources in the southwestern United States, Colorado River Water (CRW) and California State Project Water (SPW), were studied in bench-scale experiments examining two Trihalomethane (THM) precursor removal processes, activated carbon adsorption and ozone oxidation. Both source water contained bromide (Br-) ion leading to brominated THMs upon chlorination. Activated carbon removed THM precursors, as measured by dissolved organic carbon (DOC), while having little effect on bromide. The net result was an increase in the ratio of Br-/DOC and an increase in the relative abundance o

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Hungate, Robert W. "Adsorption kinetics for the removal of soluble manganese by oxide- coated filter media." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43861.

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This study was conducted to examine the kinetics of manganese sorption on oxide-coated filter media. Initial experimentation confirmed the findings of other investigators, the Mn2+ sorption capacity of oxide-coated media increases as solution pH increases. Further study revealed that uptake rate kinetics could be described by first order kinetics and also increased with increasing solution pH. The addition of free chlorine (HOCl) to solution greatly enhanced Mn2+ uptake rate kinetics. Later studies indicated that the oxide coating had very little impact on the physical properties of the media

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Ambjörnsson, Linn, Katti Ewald, Kling Erika Johansson, Anna Larsson, Selenius Marie, and Svedberg Elin. "Purification of arsenic contaminated water using ferrihydrite with consideration to current circumstances in Burkina Faso." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-295133.

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Ferrihydrite in a suspension has been studied as a solution for purification of arsenic contaminated water. Many development countries, amongst them Burkina Faso, have arsenic in their groundwater and the current methods for purification are too expensive. Measurements have shown extremely high levels of arsenic in the groundwater in several places in Burkina Faso. Since the availability of surface water is limited, the groundwater is still used as drinking water. A suspension of ferrihydrite has capacity to adsorb arsenic in water due to its chemical characteristics. Small-scale laboratory

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Rathnayake, Suramya I. "Synthesis, characterisation and application of inorganic-organic clays for water purification." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/104320/1/Rathnayake%20Mudiyanselage%20Suramya%20Indunil_Rathnayake_Thesis.pdf.

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This thesis reports a new remediation approach for the removal of toxic and high priority water pollutants based on the use of modified clays. Novel types of modified clays called inorganic-organic clays (IOCs) were synthesised and their structures and properties were characterised using various techniques. Adsorption behaviours and removal efficiencies of the IOCs towards both organic and inorganic water pollutants in Single and Binary Contaminants System were investigated. The work provides new insights into the structures, properties and potential environmental applications of IOCs in water

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Park, Yu Ri. "Synthesis, characterisation and application of organic surfactants modified clays for water purification." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/63494/1/Yu%20Ri_Park_Thesis.pdf.

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This thesis offered a step forward in the development of cheap and effective materials for water treatment. It described the modification of naturally abundant clay minerals with organic molecules, and used the modified clays as effective adsorbents for the removal of recalcitrant organic water pollutants. The outcome of the study greatly extended our understanding of the synthesis and characteristic properties of clay and modified clay minerals, provided optimistic evaluation of the modified clays for environmental remediation and offered potential utility for clay minerals in the industry an

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Lavinder, Steven Robert. "Evaluation of activated carbon processes for removing trihalomethane precursors from a surface water impoundment." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45820.

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<p>A pilot plant study was conducted in Newport News, Virginia to investigate the effectiveness of powdered activated carbon [PAC] and granular activated carbon [GAC], with and without preoxidation, for reducing trihalomethane [THM] precursor concentrations in Harwood's Mill Reservoir water. Preoxidation with ozone followed by GAC is referred to as the "biological activated carbonâ [BAC] process. This study showed that the GAC and BAC processes obtained the same level of organic removal; however, BAC would provide longer bed life and require less carbon than the GAC process. PAC treatm

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Hyung, Hoon. "Dispersion of fullerenes in natural water and their behavior in water treatment process." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24812.

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Thesis (Ph.D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Jae-Hong Kim; Committee Member: Joseph hughes; Committee Member: Michael Bergin; Committee Member: Seung Soon Jang; Committee Member: Vernon Snoeyink.

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Hawley, Harmonie A. "TCE removal utilizing coupled zeolite sorption and advanced oxidation." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0428103-150434.

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Livres sur le sujet "Water - Purification - Adsorption"

Worch, Eckhard. Adsorption technology in water treatment. Berlin: De Gruyter, 2012.

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Bonilla-Petriciolet, Adrián, Didilia Ileana Mendoza-Castillo, and Hilda Elizabeth Reynel-Ávila, eds. Adsorption Processes for Water Treatment and Purification. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1.

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M, Aly Osman, ed. Adsorption processes for water treatment. Boston: Butterworth, 1987.

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Adsorption technology in water treatment. Berlin: De Gruyter, 2012.

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Markovich, Koganovskiĭ Aleksandr, ed. Adsorbt͡s︡ii͡a︡ organicheskikh veshchestv iz vody. Leningrad: "Khimii͡a︡," Leningradskoe otd-nie, 1990.

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Wang, Lawrence K. Flotation technology. New York: Humana, 2010.

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Patel, Rahul. Radium removal from water by manganese dioxide adsorption and diatomaceous earth filtration. Cincinnati, OH: U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory, 1992.

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Çeçen, Ferhan. Activated carbon for water and wastewater treatment: Integration of adsorption and biological treatment. Weinheim: Wiley-VCH, 2011.

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Symons, James M. Treatment of drinking water by bromide addition and powdered activated carbon adsorption. Cincinnati, OH: U.S. Environmental Protection Agency, Water Engineering Research Laboratory, 1986.

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Chapitres de livres sur le sujet "Water - Purification - Adsorption"

Pillai, Suraj Babu. "Adsorption in Water and Used Water Purification." In Handbook of Water and Used Water Purification, 1–22. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-66382-1_4-1.

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Gaur, Vivekanand. "Adsorption on Activated Carbon: Role of Surface Chemistry in Water Purification." In Aqueous Phase Adsorption, 283–300. Boca Raton : Taylor & Francis, CRC Press, 2019.: CRC Press, 2018. http://dx.doi.org/10.1201/9781351272520-10.

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Bonilla-Petriciolet, Adrián, Didilia Ileana Mendoza-Castillo, and Hilda Elizabeth Reynel-Ávila. "Introduction." In Adsorption Processes for Water Treatment and Purification, 1–18. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1_1.

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Piccin, Jeferson Steffanello, Tito Roberto Sant’Anna Cadaval, Luiz Antonio Almeida de Pinto, and Guilherme Luiz Dotto. "Adsorption Isotherms in Liquid Phase: Experimental, Modeling, and Interpretations." In Adsorption Processes for Water Treatment and Purification, 19–51. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1_2.

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Dotto, Guilherme Luiz, Nina Paula Gonçalves Salau, Jeferson Steffanello Piccin, Tito Roberto Sant’Anna Cadaval, and Luiz Antonio Almeida de Pinto. "Adsorption Kinetics in Liquid Phase: Modeling for Discontinuous and Continuous Systems." In Adsorption Processes for Water Treatment and Purification, 53–76. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1_3.

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Durán-Valle, Carlos Javier, Almudena B. Botet-Jiménez, and Delia Omenat-Morán. "Hydrothermal Carbonisation: An Eco-Friendly Method for the Production of Carbon Adsorbents." In Adsorption Processes for Water Treatment and Purification, 77–108. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1_4.

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Xu, Meng, and Gordon McKay. "Removal of Heavy Metals, Lead, Cadmium, and Zinc, Using Adsorption Processes by Cost-Effective Adsorbents." In Adsorption Processes for Water Treatment and Purification, 109–38. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1_5.

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Rivera-Utrilla, José, Manuel Sánchez-Polo, and Raúl Ocampo-Pérez. "Removal of Antibiotics from Water by Adsorption/Biosorption on Adsorbents from Different Raw Materials." In Adsorption Processes for Water Treatment and Purification, 139–204. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1_6.

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Altimari, Pietro, Fabrizio Di Caprio, and Francesca Pagnanelli. "Biosorption of Copper by Saccharomyces cerevisiae: From Biomass Characterization to Process Development." In Adsorption Processes for Water Treatment and Purification, 205–24. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1_7.

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Rahim Pouran, Shima, Mohammad Saleh Shafeeyan, Abdul Aziz Abdul Raman, Wan Mohd Ashri Wan Daud, and Abolfazl Bayrami. "Transition Metal-Substituted Magnetite as an Innovative Adsorbent and Heterogeneous Catalyst for Wastewater Treatment." In Adsorption Processes for Water Treatment and Purification, 225–47. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1_8.

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Actes de conférences sur le sujet "Water - Purification - Adsorption"

Angappan, Sajeevan, Mudith Karunaratne, Charitha Thambiliyagodage, and Leshan Usgodaarachchi. "Development of Silica-Copper Nanocomposite for Water Purification." In The SLIIT International Conference on Engineering and Technology 2022. Faculty of Engineering, SLIIT, 2022. http://dx.doi.org/10.54389/vodw8508.

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Water pollution is one of the serious concerns across the world at the moment. Industrial wastewater significantly contributes to the negative impacts caused by water pollution. Textile industries discharge large amounts of effluents into water streams with little or no treatment of the discharge because wastewater treatment is an expensive process. Thus, there exists a need for a cheap and effective way to treat textile effluent that contains dyes before being discharged. A high purity silica-based Nano-adsorbent was synthesized by using rice husk as the commercially available main cheap prec

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Tsyntsarski, Boyko. "NEW COMBINED MEMBRANE-ADSORPTION TECHNOLOGY FOR PURIFICATION OF WATER FROM ORGANIC POLLUTANTS." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/31/s12.059.

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Oviroh, Peter Ozaveshe, Jitian Han, and Tien-Chien Jen. "Simulation of MoS2 Nanolayer Membrane Performance for Water Desalination Using ReaxFF." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10578.

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Abstract The use of nanolayer membrane for desalination is an emerging new technology for water purification. Improvements in nanotechnology have led to the development of a variety of nanolayer membranes such as MoS2 and Graphene for water purification that could replace current materials used for reverse osmosis. The reaction of water on 2D monolayer of Molybdenum disulphide (MoS2) was studied using the ReaxFF. Different vacant sites were created such as Mo- and S-vacancy, MoS and S2-divacancy, MoS2 and MoS2-triple for the minimization. The H-O-H and O-H-H molecule demonstrated a stable nega

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Baytamo, Ton John L., Katrina C. Perez, and Michelle C. Almendrala. "PASIG RIVER WATER PURIFICATION BY ULTRAFILTRATION: APPLICATION OF DUAL COAGULATION AND ADSORPTION FOR ENHANCED TREATMENT PROCESS." In 22nd International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/3.2/s12.17.

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The treatment of the Pasig River water using ultrafiltration is a promising solution that may help address issues on public water quality and availability around Metro Manila, Philippines. To improve the treatment performance, ultrafiltration can be applied with coagulation and adsorption. In this study, the effectiveness of ultrafiltration in treating the Pasig River water with dual coagulation and adsorption was investigated by determining the percent removal of TDS, turbidity, Escherichia coli (E. coli), nitrate, pH, copper, chromium, lead, total hardness, true color, and odor. The jar test

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Zhang, Peikun, Li Wang, Yuzhi Cheng, Zhengqiang Li, Yuan Gao, and Ding Wang. "Regeneration Strategies of Air-Purification TSA Process for Cryogenic Air Distillation Plant." In ASME 2010 4th International Conference on Energy Sustainability. ASMEDC, 2010. http://dx.doi.org/10.1115/es2010-90330.

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Since the regeneration step in the Temperature Swing Adsorption (TSA) process requires time enough to heat and cool the bed, it is often the time-limiting step in the TSA cycle and it consumes a huge amount of energy for regeneration. Therefore, a valid management of the regeneration process can minimize the energy consumption of the TSA process which is involved with regeneration time, purge gas requirements, and heat load. Simulation software was developed for industrial scale bed of TSA. A new isotherm equation which performs well in predicting experiment data was extended to multi-componen

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Opetubo, Oriyomi, Sunday Temitope Oyinbo, Peter Ozaveshe Oviroh, Ibitoye Ayotunde, and Tien-Chien Jen. "Investigation of Adsorption, Dissociation, and Hydrogen Diffusion Through V-Ni-Zr Alloys Surface for Hydrogen Purification: First Principle Method." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-96856.

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Abstract Hydrogen is an alternative source of fuel to replace fossil fuels. Its byproduct is water, and it is environmentally friendly. To meet the United Nations goal of zero greenhouse gas emissions by 2050, hydrogen generation and purification must be capable of meeting the annual demand for fossil fuel. Vanadium (V) is a potential material to replace Pd-based metals due to its high diffusion. However, due to its high solubility, it suffers severe hydrogen embrittlement. Moreso, alloying with vanadium, such as Nickel (Ni), has lowered its solubility. Hence, this study used the first princip

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Oster, Benjamin G., John P. Hurley, Nikhil Patel, Ted R. Aulich, Michael E. Collings, Ronald C. Timpe, and Franklin H. Holcomb. "High Pressure Reforming and Hydrogen Purification for Military Fuel Cell Use." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65188.

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A high pressure water reforming (HPWR) reactor system was designed and constructed to operate at pressures up to 82,737kPa and temperatures up to 913K. Initial HPWR hydrogen production tests have been conducted with two feedstocks: an aromatics- and sulfur-free natural gas-derived fuel (S-8) and methanol. Feedstock and water were continuously pumped into a reactor vessel where they were catalytically reformed to a hydrogen-rich reformate product. Reactor temperature, pressure, and space velocity were varied to determine their effect on reformate hydrogen concentration. Online, Raman spectrosco

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Artemev, Alexandr. "FLOCCULATION OF FINE APATITE AIMED AT REDUCING ENVIRONMENTAL WATER USE PROBLEMS IN MINERAL PROCESSING PLANTS." In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b1/v3/48.

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"Water treatment technologies involving pre-treated industrial effluents without transporting them to the tailing dump are of interest primarily from an environmental point of view, as they reduce the environmental burden. The paper studies the possibility of purification of process waters from apatite concentrate production from suspended particles and water-soluble impurities using polyacrylamide flocculants. By studying the processes of adsorption of H+ and OH- ions from aqueous solutions, the acid-base properties of the surface of the solid phase of the most polluted technological product

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Korsgaard, Anders Risum, Mads Pagh Nielsen, Mads Bang, and So̸ren Knudsen Kær. "Modeling of CO Influence in PBI Electrolyte PEM Fuel Cells." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97214.

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In most PEM fuel cell MEA’s Nafion is used as electrolyte material due to its excellent proton conductivity at low temperatures. However, Nafion needs to be fully hydrated in order to conduct protons. This means that the cell temperature cannot surpass the boiling temperature of water and further this poses great challenges regarding water management in the cells. When operating fuel cell stacks on reformate gas, carbon monoxide (CO) content in the gas is unavoidable. The highest tolerable amount of CO is between 50–100 ppm with CO-tolerant catalysts. To achieve such low CO-concentration, exte

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Tu, Rang, and Lanbin Liu. "Performance Evaluations of Extracting Water From Dry Air Using Multi-Stage Desiccant Wheels and Vapor Compression Cycle." In ASME 2019 Heat Transfer Summer Conference collocated with the ASME 2019 13th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ht2019-3554.

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Abstract A water extraction device that takes water from air in dry area is proposed. This device is designed to meet domestic water demand in remote rural areas, where the climate is dry and fresh water is scarce. The device can be driven effectively by low-temperature waste heat and has the characteristics of large daily water production, low energy consumption per unit of water and high water quality. Because the moisture content of air in dry area is very low, the effect of direct condensation is limited. Solid adsorbent is able to adsorb water vapor from air at a low temperature and relea

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Rapports d'organisations sur le sujet "Water - Purification - Adsorption"

Chefetz, Benny, Baoshan Xing, Leor Eshed-Williams, Tamara Polubesova, and Jason Unrine. DOM affected behavior of manufactured nanoparticles in soil-plant system. United States Department of Agriculture, January 2016. http://dx.doi.org/10.32747/2016.7604286.bard.

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The overall goal of this project was to elucidate the role of dissolved organic matter (DOM) in soil retention, bioavailability and plant uptake of silver and cerium oxide NPs. The environmental risks of manufactured nanoparticles (NPs) are attracting increasing attention from both industrial and scientific communities. These NPs have shown to be taken-up, translocated and bio- accumulated in plant edible parts. However, very little is known about the behavior of NPs in soil-plant system as affected by dissolved organic matter (DOM). Thus DOM effect on NPs behavior is critical to assessing the

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