Relevant bibliographies by topics / Adsorption of methylene blue

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Academic literature on the topic 'Adsorption of methylene blue'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Adsorption of methylene blue"

1

Haas, Aline, and Eliane Pereira dos Santos. "Characterization and application of orange peel as an adsorbent for cationic dye removal from aqueous solution." Revista Eletrônica em Gestão, Educação e Tecnologia Ambiental 25 (May 6, 2021): e16. http://dx.doi.org/10.5902/2236117065271.

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With the great generation of colored effluents, several methods for the removal of the color are used, being one of them the method of adsorption in solid medium. In this paper, the in natura orange peel was used as the alternative biomass for the adsorption process of methylene blue, which was characterized by moisture content, pH, apparent density, iodine number, and methylene blue index. To determine the adsorptive capacity of the methylene blue dye, pH 7 was obtained as favorable, the adsorption process showed an adsorption of 82% of the methylene blue dye and a 10 min equilibrium time, where the Freundlich isotherm presented a better adaptation to the adsorption process in orange peel, with its maximum adsorption capacity of 3.9630 mg g-1, for the methylene blue dye.
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Savcı, Serpil, and Fatma Karadağ. "FAST ADSORPTION OF METHYLENE BLUE BY FILTER COFFEE WASTE." e-Journal of New World Sciences Academy 15, no. 4 (October 31, 2020): 111–20. http://dx.doi.org/10.12739/nwsa.2020.15.4.5a0138.

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In this study, removal of a cationic dye methylene blue by filter coffee grounds as a potential waste was investigated. Systematically, the effect of initial dye concentration, pH and contact time on the adsorption efficiency were determined. Isotherm and kinetic models were studied. Langmuir and Freundlich model were calculated for adsorption of methylene blue. Langmuir model is better fit than Freundlich model (R2=0.9892). The maximum adsorption capacity of filter coffee waste were 312.515 mg/g. Scanning electron microscope (SEM) images were used to record the surface characteristics and morphological features of filter coffee waste. This study emphases that filter coffee waste can effectively remove methylene blue from aqueous solution.
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Labiebah, Ghina, Gunawan Gunawan, Muhammad Cholid Djunaidi, Abdul Haris, and Didik Setiyo Widodo. "Removal of Methylene Blue Using Used Paper Powder." Jurnal Kimia Sains dan Aplikasi 22, no. 1 (January 30, 2019): 23–28. http://dx.doi.org/10.14710/jksa.22.1.23-28.

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Methylene blue removal by adsorption method had been done in batch method using adsorbent of used paper powder. Adsorption parameters covering adsorbent doses, contact times, pH, adsorbate concentrations and adsorption isotherm as well as desorption study of the absorbed methylene blue were evaluated. The results showed the highest adsorption of methylene blue was obtained at an optimum adsorbent dose, for 30 min at pH > 9. The maximum adsorption capacity of 30.77 mg/g was obtained with Langmuir isotherm model. While the effective methylene blue desorption on the used paper powder adsorbent was obtained c.a. 0.27 mg/g at pH 1.
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Liu, Wen Lei, Shan Lin Zhao, Shuang Cui, Shuang Chun Yang, and Li Yan Shang. "The Research on the Adsorptive Capability and Adsorption Isotherm of Modified Talcum Powder to Methylene Blue." Advanced Materials Research 610-613 (December 2012): 1443–48. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.1443.

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The preparation conditions of modified talcum powder were investigated by discuss the effects of nitric acid mass concentration, nitric acid soak temperature, roasting temperature and roasting time on adsorption properties of methylene blue by talcum powder. Methylene blue dye, as target pollutant, exhibits difficult biochemical degradable characters. The adsorption isotherm of adsorption process was discussed by using the Langmuir isotherm model and Freundlich isotherms model. The results show that the rate of adsorption of methylene blue decreased with the increasing of roasting temperatures and nitric acid soak temperature of modificated talcum powder. The adsorption value of methylene blue of the modified talcum powder increased gradually，then decreased with the increase of roasting time. Compare with the unmodified talcum powder，the adsorption value of methylene blue of the modified talcum powder decreased when roasting temperature and roasting time is too high. With the nitric acid mass concentration increasing, the adsorption of methylene blue on the modified talcum powder increased. It is found that the adsorptive ability of modified talcum powder by HNO3 is higher than original talcum powder. The best talcum powder modified preparation condition is that nitric acid mass concentration 50%, the nitric acid soaks temperature 40°C, calcined temperature 200°C for 120 mins. The removal rate of methylene blue is 84.6% under these preparation conditions. The experimental date fitted very well with the Langmuir isotherms model.
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Zhang, Cai Ning, and Xu Man Wang. "Study on Adsorption of Methylene Blue by the Montmorillonite/poly(γ-Glutamic Acid) Composite." Advanced Materials Research 554-556 (July 2012): 333–38. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.333.

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The composite was prepared with montmorillonite (MMT) and poly(γ-glutamic acid) (γ-PGA). Applied the composite as the sorbent, methylene blue as the adsorbate, the influences of the initial concentrations of methylene blue, adsorption time and pH values of the solution on the adsorption capacity of methylene blue by the composite were studied. The experimental results showed that the adsorption capacity of methylene blue by MMT/γ-PGA composite both increased with the increasing of initial concentration of methylene blue and the prolonging of adsorption time, and then approached saturation respectively. The adsorption capacity of methylene blue by MMT/γ-PGA composite increased with the increasing of pH values of methylene blue solution. Meanwhile, the study of adsorption mechanism demonstrated that the adsorption of methylene blue by MMT/γ-PGA composite was Langmuir type, and the adsorption equation wasΓ=0.204c/(1+0.381C).
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Huang, Zhao Long, Shao Ping Feng, Yan Jiang, Rui Min Xiao, Li Da Sun, and Shun Li Lu. "Improvement on Determination of the Adsorption Value of Activated Carbon on Methylene Blue." Advanced Materials Research 1033-1034 (October 2014): 579–82. http://dx.doi.org/10.4028/www.scientific.net/amr.1033-1034.579.

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Characteristics of absorption of activated carbon on methylene blue were studied. It was demonstrated that adsorption of activated carbon on methylene blue was very stable on monomolecular adsorption and when multimolecular adsorption existed adsorption became to be weak. An improved method was suggested that many samples were tested adsorption of activated carbon on methylene blue in parallel experiment and certain sample was selected to use in next experiment, its color should approximate to the color of 0.4% CuSO4 but darker slightly and activated carbon loaded methylene blue was added some fresh phosphate buffer solution to desorb methylene blue on the activated carbon, testing absorption value total concentration of methylene blue in the solutionin (merging the first and second experiment) by spectrophotometer, calculating adsorption value on difference method which original volume of methylene blue added subtracts rest of methylene blue in the solution after adsorption. The new method was simple, rapid and easy. word times would shorten obviously.
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Zhao, Lin Xiu, Si Guo Yuan, Jiao Sha, and Shao Bin Li. "Hypercrosslinked Polymers Preparation VS Methylene Blue Adsorption." Materials Science Forum 743-744 (January 2013): 539–44. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.539.

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In the study, two kinds of hypercrosslinked polymers were prepared by polymerization of dichloromethyl aryl monomer with benzene or itself. The chemical and pore structure of above polymers were characterized by FT-IR and BET. The results showed that these polymers possessed high BET specific surface area (up to 1000 m2/g) and large pore volumes (up to 1.2cm3/g). Two commercial polymer adsorbent (XAD-4, H103) and two new synthesized polymeric adsorbents (BE-XDC, CMB-CMB) have been used for the adsorption of reactive dye methylene blue (MB) from aqueous solution, and the static capacity followed an order as: CMB-CMB(142.77mg/g) > BE-XDC(104.61mg/g) > H103(71.01mg/g) > XAD-4(53.85mg/g). The Equilibrium adsorption data of the four polymeric adsorptions were obtained and fitted very well to Freundlich model. The adsorption equilibrium time of CMB-CMB, BE-XDC resin were less than 200min, which were faster than that of XAD-4, H103. The free energy changes, ΔG for adsorption of MB on the four polymeric adsorbents in the aqueous solution was evaluated. The negative values of ΔG indicated that the overall adsorption processes were spontaneous and thermodynamically favorable.
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Garcia, Ronald Vieira, Magno de Lima Silva, Victor Emanuel de Morais Oliveira, Vitória Catarina Cardoso Martins, Josiney Farias de Araújo, Erival Gonçalves Prata, and Leandro Marques Correia. "Materials for methylene blue adsorption." Research, Society and Development 10, no. 9 (July 28, 2021): e37410918114. http://dx.doi.org/10.33448/rsd-v10i9.18114.

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Adsorption is a surface phenomenon, in which the adsorbate is adhered to an adsorbent material and have been study for the removal of textile dyes, which have high toxicity to the aquatic environment. One of the dyes that stands out is methylene blue, which is organic, basic, aromatic, heterocyclic and molecular formula (C16H18ClN3S). In this study, we aim was to carry out a bibliography review in national and international scientific journals with articles published in the period from 2005 to 2019, of the adsorbent materials for the adsorption of the methylene blue dye. The materials reported are: mango seed powder, wheat husks, activated carbon obtained from rattan sawdust, activated carbon prepared from coconut shell, garlic shell, NaOH modified pummell shell, activated carbon (coconut shell and modified with NaOH), activated carbon (pea peel), HCl modified watermelon peel, potato peel, ZnCl2 activated cashew nut peel, mesoporous carbon obtained from fish scales, pineapple peel and bamboo. Our review indicate that the adsorbent materials found in the literature for methylene blue adsorption have high adsorption capacities. The adsorption capacities are high and depend on several parameters, which influence the adsorption (pH of the medium, mass and particle size of the adsorbent material, concentration of adsorbate (methylene blue), temperature and time of contact of the adsorbate with the adsorbent.
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Rendo, Donatus. "Adsorption of Methylene Blue Dye using Fe3O4 Magnetized Natural Zeolite Adsorbent." Jurnal Kimia Sains dan Aplikasi 24, no. 2 (February 24, 2021): 51–57. http://dx.doi.org/10.14710/jksa.24.2.51-57.

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Preparation and characterization of Fe3O4 magnetized natural zeolite adsorbent for adsorption of methylene blue dye have been carried out. Natural zeolite/Fe3O4 adsorbent preparation was carried out using coprecipitation of Fe2+ and Fe3+ ions (1: 2 mol ratio) on the natural zeolite surface. Characterization was carried out using X-Ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR), and Scanning Electron Microscopy (SEM) to determine the effect of Fe3O4 on the natural zeolite surface. UV-Vis spectroscopy was used to determine the concentration of methylene blue after the adsorption process. The characterization results showed that Fe3O4 was successfully embedded in the natural zeolite without damaging the natural zeolite's crystallinity. Natural zeolite/Fe3O4 adsorbent showed easy separation from water medium after the adsorption process. The optimum conditions for adsorption were achieved at the contact time of 60 minutes, and the initial concentration of methylene blue was 30 ppm with an adsorbent mass of 25 mg. Adsorption kinetics followed pseudo-second-order reaction kinetics, and adsorption isotherm followed Langmuir isotherm with an adsorption capacity of 32.258 mg/g.
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Taufik, Ardiansyah, and Rosari Saleh. "Adsorption-Sono Degradation Synergetic Removal of Methylene Blue by Magnetic Fe3O4-Nanographene Platelets (Fe3O4-NGP) Composites." Materials Science Forum 864 (August 2016): 106–11. http://dx.doi.org/10.4028/www.scientific.net/msf.864.106.

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The magnetic Fe3O4-nanographene platelets (Fe3O4–NGP) platelets composites with various concentrations of nanographene platelets were used as a catalyst for the removal of methylene blue in aqueous solution. The adsorption and sonocatalytic performances were evaluated using methylene blue in aqueous solution. The effect of NGP content in the Fe3O4–NGP, pH and initial concentrations of methylene blue were investigated. Compared in the dark Fe3O4–NGP shows faster and higher removal efficiency by the adsorption and sonodegradation. It could be concluded that synergy of adsorption and sonodegradation have a significant progress for removal of methylene blue compared with adsorption alone. The removal of methylene blue follows the order adsorption-sonocatalysis > sonocatalysis > adsorption. The predominant oxidative species for degradation of methylene blue was identified to be hydroxyl radicals and holes.
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Dissertations / Theses on the topic "Adsorption of methylene blue"

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Granström, Andreas. "Adsorption of methylene blue on iron-doped lignin hydrochar." Thesis, Umeå universitet, Kemiska institutionen, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-150540.

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Welagedara, Asanka. "Phosphorus Removal and Methylene Blue Adsorption by Porous Calcium Silicate Hydrate." Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171836.

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Nutrients (nitrogen and phosphorus) should be removed and recycled from wastewater in order to reduce the nutrient load to recipient waters, avoiding contamination of groundwater and conserve resources. There is a need to pay more attention to phosphorus (P) removal and recycling from wastewater due to limited availability of phosphorus recourses. For such purpose reactive filter media can be used to remove nutrient from wastewater as a sustainable technology. The present study was aimed to evaluate calcium silicate hydrate crystallization in Absol as a reactive filter media for removal and recycle of phosphorus from household wastewater and assess physical and chemical characteristics of Absol. A study of the color removing capacity of Absol was also performed. Several batch experiments were done for comparing absorption mechanism. Collected data were applied to Langmuir and Freundlich isotherm models to study type of adsorption isotherms and pseudofirst- order and second order models were run for study of adsorption kinetics. The experiment demonstrated a very high P and Methylene Blue (MB) sorption capacity. The amount of adsorbed P and MB vary with initial solution concentrations, contact time, and adsorbent dosage. Both equilibrium data (P, MB) were fitted very well in the Langmuir isotherm equation, confirming the monolayer physical sorption and adsorption kinetic followed by the pseudo-second order kinetic model. It is concluded that Absol can have potential to be use for the removal of P, textile dye contaminants and probably also pharmaceuticals present in wastewater.
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Chen, Qihang. "Exploiting High Surface Area Polymer Gels for Dye Adsorption." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1619184015747879.

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Filho, Rivadavia Tavares Martins. "Biosorbents - water hyacinth biomass and spheres alginate / cashew gum - for adsorption of methylene blue." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8326.

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nÃo hÃ
In this work was carried out an extensive investigation of the adsorption properties of synthetic dyes on different parts (rhizome, root, stolon and petiole) of Eichhornia crassipes (water hyacinth) and a comparison with the adsorption capacity of the biopolymer alginate beads doped with water hyacinth biomass. The biomasses and spheres were structurally characterized by infrared spectroscopy, scanning electron microscopy - SEM and thermal analysis (thermogravimetric analysis - TGA and Differential Scanning Calorimetry - DSC). The kinetics of adsorption processes were monitored by UV and visible spectroscopy - UV / VIS and the data applied to the models of Freundlich and Languimir. Synthetic anionic dyes (methyl orange), cationic (methylene blue) and azo (indigo carmine) were used in the investigation. Adsorption studies was obtained, under controlled agitation of 70 rpm and temperature ranging between 25ÂC and 45ÂC at concentrations of dye in the range 10-250 mg/L and pH 2-12. The best results were achieved with a dye initial concentration of 100 mg/g, an initial quantity of 60 mg biosorbent, at temperature of 45 ÂC and at basic pH. Among the tested dyes, methylene blue exhibited the best adsorption capacity. The study of adsorption kinetics showed a better fit to the model of pseudo-second order and intraparticle diffusion is involved in the mechanism of adsorption. In the study of the isotherms, the result shows best fit to data by the Langmuir and Freundlich equations, with a maximum capacity of adsorption of methylene blue dye from 819.7 mg/g at 25 ÂC, to the root. A temperature increase caused an increase in system adsorption capacity and also led to an increase in time to the system reach equilibrium. The values of the rate constant for pseudo-second order increased with increasing temperature. An increase in initial dye concentration caused an increase in the amount of dye adsorbed. The activation energy for all biosorbents are in the range 20-40 kJ.mol-1 demonstrated that the adsorption processes are physical. The thermodynamic parameters ∆HÂ, ∆SÂ and ΔGÂ, for most biosorbents indicate that the process is exothermic in nature, spontaneous and favorable, except for the sphere of ALG/GC/Biomass where values obtained showed endothermic nature. The desorption study showed that the biosorbents can be reused.
Neste trabalho foi realizada uma investigaÃÃo extensiva das propriedades de adsorÃÃo do corante azul de metileno em diferentes partes (rizoma, raiz, estolÃo e pecÃolo) de Eichhornia Crassipes (aguapÃ), bem como uma comparaÃÃo com a adsorÃÃo em esferas do biopolÃmero alginato dopadas com biomassa de aguapÃ. As biomassas e esferas foram caracterizadas estruturalmente atravÃs de tÃcnicas de espectroscopia de infravermelho, microscopia eletrÃnica de varredura â MEV e anÃlises tÃrmicas (anÃlise termogravimÃtrica â TGA e Calorimetria Diferencial de Varredura â DSC). As cinÃticas dos processos de adsorÃÃo foram monitoradas por espectroscopia de ultravioleta e visÃvel â UV/VIS e os dados obtidos aplicados nos modelos de Languimir, Freundlich, Temkin e BET. Foram utilizados corantes sintÃticos aniÃnico (alaranjado de metila), catiÃnico (azul de metileno) e azo (Ãndigo carmin). Os estudos de adsorÃÃo foram obtidos, sob agitaÃÃo controlada de 70 rpm e temperatura variando entre 25ÂC e 45ÂC, e concentraÃÃes de corante na faixa de 10 a 250 mg/L, em pH de 2 a 12. Os melhores resultados foram alcanÃados utilizando uma concentraÃÃo inicial de corante de 100 mg/g, uma massa inicial de biosorvente de 60 mg a temperatura de 45 ÂC e em pH bÃsico. Dentre os corantes testados o azul de metileno foi o que apresentou melhores resultados de adsorÃÃo. O estudo da cinÃtica de adsorÃÃo apresentou um melhor ajuste ao modelo de pseudo-segunda ordem e a difusÃo intrapartÃcula està envolvida no mecanismo de adsorÃÃo. No estudo das isotermas de equilÃbrio, o resultado mostra melhor ajuste das equaÃÃes de Langmuir e Freundlich pelos dados, com capacidade mÃxima de adsorÃÃo do corante azul de metileno de 819,7 mg/g a 25 ÂC, para a raiz do aguapÃ. A elevaÃÃo na temperatura do sistema provocou aumento na capacidade mÃxima adsorvida e tambÃm provocou um aumento no tempo para o sistema atingir o equilÃbrio. Os valores da constante de velocidade de pseudo-segunda ordem aumentaram com o aumento da temperatura. Um aumento na concentraÃÃo inicial do corante provocou um aumento na quantidade de corante adsorvida. A energia de ativaÃÃo para todos os biosorventes, da ordem de 20 â 40 kJ.mol-1, demonstrou que o processo à de natureza fÃsica. Os parÃmetros termodinÃmicos ∆HÂ, ∆S e ∆GÂ, para a maioria dos biosorventes indicam que o processo à de natureza exotÃrmica, espontÃnea e favorÃvel, com exceÃÃo da esfera de ALG/GC/Biomassa que mostrou valores de natureza endotÃrmica. O estudo de dessorÃÃo demonstrou que os biosorventes podem ser reutilizados.
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BRUNO, MARIZA. "Utilização de zeólitas sintetizadas a partir de cinzas de carvão na remoção de corante em água." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11509.

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Made available in DSpace on 2014-10-09T12:52:41Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T14:03:13Z (GMT). No. of bitstreams: 0
Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
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Li, Yan. "The Current Response of a Mediated Biological Fuel Cell with Acinetobacter calcoaceticus: The Role of Mediator Adsorption and Reduction Kinetics." Thesis, University of Canterbury. Chemical and Process Engineering, 2013. http://hdl.handle.net/10092/8017.

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Microbial fuel cells (MFC) are an emerging renewable technology which converts complex organic matter to electrical power using microorganisms as the biocatalyst. A variety of biological relevant organic matters such as glucose, acetate and ethanol have been utilized for the successful operation of a MFC. In this regard, the investigation of a MFC inoculated with ethanol oxidizing bacteria is of particular interest for this research due to its ability to simultaneously produce electricity while reducing ethanol pollution (a type of volatile organic carbon (VOC) pollutant) with potential use in modified biological air pollution control technology such as biofiltration. In this research, ethanol-oxidizing microbial species isolated from soil and compost samples were identified, with Acinetobacter calcoaceticus being the dominant strain. In order to understand the metabolism of the anode microbial cells, which is considered to be the key dictating the performance of a MFC, a systematic analysis/optimization of the growth rate and biomass production for A. calcoaceticus were carried out. A maximum specific growth rate with a final biomass concentration of 1.68 g/l was derived when aerated at a rate of 0.68 vvm. It has been recognized that one of the principle constraints in increasing the current density of MFCs is the electron transfer from the bacteria to the anode. In this sense, the addition of a redox mediator, which facilitates the process of the electron transfer, is desired for the efficient operation of a MFC. Thionine, methylene blue (MB), resorufin and potassium ferricyanide that have been profusely utilized as effective mediator compounds in many MFC studies, however, specific information on the biomass sorption of these compounds was lacking and therefore were selected for this research. All mediators tested were reduced biologically in A. calcoaceticus inoculated samples as indicated by the color transition from the pigmented oxidized form to the colorless reduced form. Subsequent tests on mediator color removal revealed that physical adsorption by the biomass, aggregation as well as precipitation accounted for a significant portion of the color loss for thionine and MB. It was speculated that the fraction of the initial mediator concentration sequestered, aggregated and/or precipitated no longer contributed to the electron transfer process, resulting in a current production which was proportional to the measurable mediator concentration remained in anode solution. To verify this hypothesis, chronoamperometric measurements were conducted for various mediator systems at known initial and measurable concentrations. The data obtained on the current produced were in good agreement with the theoretical predictions calculated from the actual mediator concentration, suggesting that the current produced depended on the concentration of mediator remaining in solution. Finally, the microbial reduction kinetics and the cytotoxicity of potassium ferricyanide were analyzed. The reduction of potassium ferricyanide followed zero order kinetics with the specific reduction rate increased as the initial mediator concentration increased from 1 mM to 200 mM. Inhibitory effects on cell growth were observed at initial potassium ferricyanide concentration of 50 mM.
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Contreras, Osmary C. "A comparative study of tailored activated carbon from waste tires against commercial activated carbon (F400) for the removal of Methylene Blue." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1383812437.

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Santos, EvÃnia Carvalho dos. "Synthesis and characterization of Al-MCM-41using kaolin as raw material by hydrothermal route and assessment of its performance in methylene blue adsorption." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=15944.

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The mesoporous materials Al-MCM-41 produced from kaolin, low cost raw material, by means of hydrothermal acid treatment route, has shown potential for being used as adsorbent in removal process of methylene blue. The process of synthesis of Al-MCM-41 is based on calcination of kaolin, dealumination by acid treatment, hydrothermal synthesis and extraction of the surfactant. The characterization of de obtained mesoporous material was carried out by techniques such as: X-ray diffraction, vibrational spectroscopy in the infrared, 29Si and 27Al nuclear magnetic resonance in the solid state, scanning electron microscopy, transmission electron microscopy and N2 adsorption/desorption. The X-ray diffraction at low angles allowed the determination of the cell parameter, which was 4.02 nm. The analyses of scanning and transmission electron microscopy revealed important morphological properties of the synthesized material. N2 adsorption/desorption showed a BET specific surface area of 1,303 m2 g-1, pore volume of 1.23 cm3 g-1 and average diameter of 2.45 nm. PZC measurements showed a pHPZC of 2.69. The adsorption of methylene blue by Al-MCM-41 adsorbent showed high kinetic and high adsorption capacity, with values around 316 mg g-1.
O material mesoporoso Al-MCM-41 produzido a partir de caulim, matÃria-prima de baixo custo, por meio de rota hidrotÃrmica com tratamento Ãcido, mostrou-se promissor para ser usado como adsorvente do corante azul de metileno. O processo de sÃntese da Al-MCM-41 Ã baseado na calcinaÃÃo do caulim, desaluminizaÃÃo por tratamento Ãcido, sÃntese hidrotÃrmica e eliminaÃÃo do surfactante. A caracterizaÃÃo do material mesoporoso foi realizada por meio de tÃcnicas como: difraÃÃo de raios-X, espectroscopia vibracional na regiÃo do infravermelho, ressonÃncia magnÃtica nuclear no estado sÃlido de 29Si e 27Al, microscopia eletrÃnica de varredura, microscopia eletrÃnica de transmissÃo e adsorÃÃo de N2. A anÃlise de difraÃÃo de raios-X em baixo Ãngulo da Al-MCM-41 permitiu a determinaÃÃo do parÃmetro de cÃlula que apresentou valor de 4,02 nm. As anÃlises de microscopia eletrÃnica de varredura e de transmissÃo revelaram importantes propriedades morfolÃgicas do material sintetizado. Utilizando as medidas de adsorÃÃo e desorÃÃo de gÃs N2 a Ãrea superficial especÃfica BET da Al-MCM-41 apresentou valor 1.303 m2 g-1, com um volume de poros de 1,23 cm3 g-1 e diÃmetro mÃdio de 2,45 nm. O teste do PZC determinou um pHPZC de 2,69. Os testes de adsorÃÃo do azul de metileno pelo adsorvente Al-MCM-41 mostraram que o mesmo apresenta alta capacidade de adsorÃÃo com valores em torno de 316 mg g-1.
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Bonetto, Luis Rafael. "Estudo da adsorção do corante azul de metileno por um resíduo sólido da indústria do suco de maça." reponame:Repositório Institucional da UCS, 2016. https://repositorio.ucs.br/handle/11338/1232.

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O desenvolvimento de novas tecnologias para o tratamento de efluentes contendo corantes tem sido alvo de grande interesse nos últimos anos, devido ao aumento da conscientização acerca da preservação ambiental, além da rigidez da legislação específica. Neste contexto, a adsorção tem se mostrado uma técnica bastante promissora para a remoção de cor, uma vez que apresenta custo relativamente baixo, além de possuir apreciável eficiência. Considerando os aspectos mencionados, este trabalho teve por objetivo avaliar a capacidade adsorvente de um resíduo sólido proveniente da indústria de suco de maçã na remoção do corante catiônico azul de metileno em meio aquoso. Após sua coleta e preparação, o bagaço de maçã foi caracterizado por meio de várias técnicas, como análise elementar, espectroscopia no infravermelho com Transformada de Fourier, espectroscopia de ressonância magnética nuclear de carbono-13 no estado sólido, análise termogravimétrica e microscopia eletrônica de varredura. A área superficial específica, bem como o diâmetro médio das partículas e o pH no ponto de carga zero foram igualmente determinados. Após a caracterização, a capacidade de adsorção do bagaço de maçã foi investigada em sistema de batelada. A concentração de corante remanescente em todos os experimentos de adsorção foi estimada por meio de uma curva de calibração, utilizando-se a técnica de espectroscopia de absorção molecular na região do visível. Além disso, a influência de parâmetros experimentais, tais como concentração inicial do corante, massa de adsorvente, pH do meio, velocidade de agitação do sistema e temperatura, foi avaliada por meio da execução de planejamento fatorial. Com relação ao equilíbrio de adsorção, foi verificado que a isoterma de Langmuir foi a que melhor se ajustou aos resultados experimentais em todas as temperaturas avaliadas, apresentando valores para a constante de Langmuir (KL) e para a capacidade máxima de adsorção (qm) nas faixas 0,0951 a 0,1122 L mg-1 e 97,60 a 133,15 mg g-1, respectivamente. Do ponto de vista termodinâmico, os resultados revelaram um processo físico e espontâneo, com valores de ΔG°ads menores do que -0,59 kJ mol-1, enquanto que ΔH°ads e ΔS°ads resultaram em -19,84 kJ mol-1 e -62,72 J mol-1 K-1, respectivamente. No que se refere à cinética de adsorção, o modelo de pseudossegunda ordem foi o que melhor descreveu o processo. O estudo dos mecanismos de transferência de massa demonstrou que o processo de adsorção é controlado tanto pela difusão no filme estagnado que recobre as partículas, quanto pela difusão intrapartícula no interior dos poros das mesmas para a maior parte das condições de processo verificadas. Os valores para o coeficiente de transferência de massa através do filme estagnado (kf) situaram-se na faixa de 0,57 × 10-6 a 3,13 × 10-5 m min-1, enquanto que a constante de velocidade de difusão intrapartícula (kint) ficou compreendida entre 4,43 e 9,81 mg g-1 min-1. Por fim, o bagaço de maçã mostrou ser um bom adsorvente para a remoção do corante catiônico azul de metileno, podendo ser reutilizado em mais de um ciclo de remoção, sem perdas significativas de propriedades após o processo de regeneração utilizando etanol como solvente.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES.
The development of new technologies for the treatment of wastewater containing dyes has generated a great interest in recent years, due to increase awareness about environmental preservation, in addition to the rigidity of specific legislation. In this sense, the adsorption has been a promising technique for color removal, once it offers relatively low-cost, besides to be endowed appreciable efficiency. Considering the mentioned aspects, this study aimed to evaluate the adsorption capacity of a solid agro-industrial waste from apple juice industry (pomace) in the removal of methylene blue cationic dye in aqueous medium. After its collection and preparation, the biomass was characterized by means of several techniques, including elemental analysis, Fourier transform infrared spectroscopy, solid-state 13C nuclear magnetic resonance spectroscopy, thermogravimetric analysis and scanning electron microscopy. The specific surface area, as well as the average diameter of the particles and the pH at the point of zero charge were also determined. After characterization, the adsorption capacity of the apple pomace was investigated in a batch system. The concentration of dye in all remaining adsorption experiments was estimated using a calibration curve by means of molecular absorption spectroscopy in the visible region. Furthermore, the influence of experimental parameters such as initial dye concentration, adsorbent amount, pH of the medium, stirring rate of the system and temperature were also evaluated by a factorial design. Concerning the adsorption equilibrium, the Langmuir isotherm provided the best fit for the experimental data for all temperature evaluated, with values for the Langmuir constant (KL) and maximum adsorption capacity (qm) situated in the ranges from 0.0951 to 0.1122 L mg-¹ and 97.60 to 133.15 mg g-¹, respectively. From the thermodynamic point of view, the results revealed a physical and spontaneous adsorption process, with values lower than -0.59 kJ mol-1 for ΔG°ads, while ΔH°ads and ΔS°ads resulted in -19.84 kJ mol-1 and -62.72 J mol-1 K-1, respectively. The adsorption kinetics was better described using a pseudo-second-order model. Studies on the mechanisms of mass transfer have shown that the adsorption process is controlled by either diffusion on the stagnant film that covering the particles and intraparticle diffusion inside particle porous in the most part of experimental conditions tested. The values of stagnant film mass transfer coefficient (kf) lie within 0.57 × 10-6 to 3.13 × 10-5 m min-1 range, while intraparticle diffusion rate constant (kint) remained between 4.43 and 9.81 mg g-1 min-1. Finally, the apple pomace shown to be a suitable adsorbent for the removal of methylene blue cationic dye and can be reused for several adsorption cycles without significant properties losses after the regeneration process using ethanol as a solvent.
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10

Bonetto, Luís Rafael. "Estudo da adsorção do corante azul de metileno por um resíduo sólido da indústria do suco de maça." reponame:Repositório Institucional da UCS, 2016. https://repositorio.ucs.br/handle/11338/1232.

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Abstract:
O desenvolvimento de novas tecnologias para o tratamento de efluentes contendo corantes tem sido alvo de grande interesse nos últimos anos, devido ao aumento da conscientização acerca da preservação ambiental, além da rigidez da legislação específica. Neste contexto, a adsorção tem se mostrado uma técnica bastante promissora para a remoção de cor, uma vez que apresenta custo relativamente baixo, além de possuir apreciável eficiência. Considerando os aspectos mencionados, este trabalho teve por objetivo avaliar a capacidade adsorvente de um resíduo sólido proveniente da indústria de suco de maçã na remoção do corante catiônico azul de metileno em meio aquoso. Após sua coleta e preparação, o bagaço de maçã foi caracterizado por meio de várias técnicas, como análise elementar, espectroscopia no infravermelho com Transformada de Fourier, espectroscopia de ressonância magnética nuclear de carbono-13 no estado sólido, análise termogravimétrica e microscopia eletrônica de varredura. A área superficial específica, bem como o diâmetro médio das partículas e o pH no ponto de carga zero foram igualmente determinados. Após a caracterização, a capacidade de adsorção do bagaço de maçã foi investigada em sistema de batelada. A concentração de corante remanescente em todos os experimentos de adsorção foi estimada por meio de uma curva de calibração, utilizando-se a técnica de espectroscopia de absorção molecular na região do visível. Além disso, a influência de parâmetros experimentais, tais como concentração inicial do corante, massa de adsorvente, pH do meio, velocidade de agitação do sistema e temperatura, foi avaliada por meio da execução de planejamento fatorial. Com relação ao equilíbrio de adsorção, foi verificado que a isoterma de Langmuir foi a que melhor se ajustou aos resultados experimentais em todas as temperaturas avaliadas, apresentando valores para a constante de Langmuir (KL) e para a capacidade máxima de adsorção (qm) nas faixas 0,0951 a 0,1122 L mg-1 e 97,60 a 133,15 mg g-1, respectivamente. Do ponto de vista termodinâmico, os resultados revelaram um processo físico e espontâneo, com valores de ΔG°ads menores do que -0,59 kJ mol-1, enquanto que ΔH°ads e ΔS°ads resultaram em -19,84 kJ mol-1 e -62,72 J mol-1 K-1, respectivamente. No que se refere à cinética de adsorção, o modelo de pseudossegunda ordem foi o que melhor descreveu o processo. O estudo dos mecanismos de transferência de massa demonstrou que o processo de adsorção é controlado tanto pela difusão no filme estagnado que recobre as partículas, quanto pela difusão intrapartícula no interior dos poros das mesmas para a maior parte das condições de processo verificadas. Os valores para o coeficiente de transferência de massa através do filme estagnado (kf) situaram-se na faixa de 0,57 × 10-6 a 3,13 × 10-5 m min-1, enquanto que a constante de velocidade de difusão intrapartícula (kint) ficou compreendida entre 4,43 e 9,81 mg g-1 min-1. Por fim, o bagaço de maçã mostrou ser um bom adsorvente para a remoção do corante catiônico azul de metileno, podendo ser reutilizado em mais de um ciclo de remoção, sem perdas significativas de propriedades após o processo de regeneração utilizando etanol como solvente.
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES.
The development of new technologies for the treatment of wastewater containing dyes has generated a great interest in recent years, due to increase awareness about environmental preservation, in addition to the rigidity of specific legislation. In this sense, the adsorption has been a promising technique for color removal, once it offers relatively low-cost, besides to be endowed appreciable efficiency. Considering the mentioned aspects, this study aimed to evaluate the adsorption capacity of a solid agro-industrial waste from apple juice industry (pomace) in the removal of methylene blue cationic dye in aqueous medium. After its collection and preparation, the biomass was characterized by means of several techniques, including elemental analysis, Fourier transform infrared spectroscopy, solid-state 13C nuclear magnetic resonance spectroscopy, thermogravimetric analysis and scanning electron microscopy. The specific surface area, as well as the average diameter of the particles and the pH at the point of zero charge were also determined. After characterization, the adsorption capacity of the apple pomace was investigated in a batch system. The concentration of dye in all remaining adsorption experiments was estimated using a calibration curve by means of molecular absorption spectroscopy in the visible region. Furthermore, the influence of experimental parameters such as initial dye concentration, adsorbent amount, pH of the medium, stirring rate of the system and temperature were also evaluated by a factorial design. Concerning the adsorption equilibrium, the Langmuir isotherm provided the best fit for the experimental data for all temperature evaluated, with values for the Langmuir constant (KL) and maximum adsorption capacity (qm) situated in the ranges from 0.0951 to 0.1122 L mg-¹ and 97.60 to 133.15 mg g-¹, respectively. From the thermodynamic point of view, the results revealed a physical and spontaneous adsorption process, with values lower than -0.59 kJ mol-1 for ΔG°ads, while ΔH°ads and ΔS°ads resulted in -19.84 kJ mol-1 and -62.72 J mol-1 K-1, respectively. The adsorption kinetics was better described using a pseudo-second-order model. Studies on the mechanisms of mass transfer have shown that the adsorption process is controlled by either diffusion on the stagnant film that covering the particles and intraparticle diffusion inside particle porous in the most part of experimental conditions tested. The values of stagnant film mass transfer coefficient (kf) lie within 0.57 × 10-6 to 3.13 × 10-5 m min-1 range, while intraparticle diffusion rate constant (kint) remained between 4.43 and 9.81 mg g-1 min-1. Finally, the apple pomace shown to be a suitable adsorbent for the removal of methylene blue cationic dye and can be reused for several adsorption cycles without significant properties losses after the regeneration process using ethanol as a solvent.
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Books on the topic "Adsorption of methylene blue"

1

R, Burkhardt M., and Geological Survey (U.S.), eds. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory: Determination of methylene blue active substances by spectrophotometry. Denver, Colo: U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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Book chapters on the topic "Adsorption of methylene blue"

1

Krstić, J., Z. Mojović, A. Abu Rabi, D. Lončarević, N. Vukelić, and D. Jovanović. "Adsorption of Methylene Blue from Aqueous Solution onto Bentonite." In Survival and Sustainability, 1097–106. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-95991-5_103.

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Belbekiri, Habiba, and Meriem Belhachemi. "Adsorption of Methylene Blue from Aqueous Solution by Natural Clays." In Progress in Clean Energy, Volume 1, 803–15. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16709-1_59.

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Balköse, Devrim, and Semra Ülkü. "Adsorption of Methylene Blue on PVC-DOP-Natural Zeolite Composites." In The Interfacial Interactions in Polymeric Composites, 439–40. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1642-8_26.

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Dali, Nacer, Réda Marouf, Malika Guerrab, Samra Djefal, and Fatima Ouadjenia. "Adsorption–Desorption of Methylene Blue by Bentonite from Aqueous Solution." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions (2nd Edition), 33–38. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-51210-1_6.

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Miao, Huanhuan, Wenjuan Wang, Yanfang Huang, Guihong Han, and Shengpeng Su. "Adsorption of Methylene Blue by CuFe2O4 Prepared from Precipitation Flotation Sludge." In Characterization of Minerals, Metals, and Materials 2021, 221–30. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65493-1_21.

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Oussalah, Asma, and Abdelhamid Boukeeroui. "Study of Methylene Blue Adsorption in Aqueous Solution Using Alginate-Bentonite Beads." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions, 171–73. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70548-4_57.

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Bhakta, Arvind K., Sunita Kumari, Sahid Hussain, Preema C. Pais, Praveen Martis, Ronald J. Mascarenhas, Samir Belkhiri, Joseph Delhalle, and Zineb Mekhalif. "Methylene Blue Dye Removal Through Adsorption Onto Amorphous BaO Nanoparticles Decorated MWCNTs." In Materials Research and Applications, 231–40. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9223-2_11.

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Kanani-Jazi, Mohammad Hassan, and Somaye Akbari. "Optimization of Methylene Blue Dye Batch Adsorption by Carboxylic Acid Functionalized Halloysite Nanotubes." In Eco-friendly and Smart Polymer Systems, 220–23. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45085-4_53.

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Arias, M., E. López, A. Nuñez, D. Rubinos, B. Soto, M. T. Barral, and F. Díaz-Fierros. "Adsorption of Methylene Blue by Red Mud, An Oxide- Rich Byproduct of Bauxite Refining." In Effect of Mineral-Organic-Microorganism Interactions on Soil and Freshwater Environments, 361–65. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4683-2_39.

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Gaikwad, R. W., S. L. Bhagat, and A. R. Warade. "External Mass Transfer Studies On Adsorption Of Methylene Blue On Psidium Guava Leaves Powder." In Innovative Technologies for the Treatment of Industrial Wastewater, 247–60. Toronto ; [Waretown] New Jersey : Apple Academic Press, 2018.: Apple Academic Press, 2017. http://dx.doi.org/10.1201/9781315365725-10.

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Conference papers on the topic "Adsorption of methylene blue"

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Chen, Yun-nen, Jin-xia Nie, and Ming Chen. "Adsorption Behavior of Methylene Blue Dye on Rice Husk." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2010). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5516442.

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Jalil, A. I. Abdul, and S. Ismail. "Adsorption of methylene blue via electrospun polyvinyl butyral/bentonite." In 6TH INTERNATIONAL CONFERENCE ON ENVIRONMENT (ICENV2018): Empowering Environment and Sustainable Engineering Nexus Through Green Technology. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5117132.

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Wang, Yi, Ting Zhang, Huixia Feng, and Jianhui Qiu. "Adsorption Characteristics of Methylene Blue on Bentonite of Gansu Pingliang." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517671.

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Gao, Congli, Jiangyan Ma, Xiaotian He, Yuanfeng Wang, and Runping Han. "Kinetics and Thermodynamics of Methylene Blue Adsorption by Cereal Chaff." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5517165.

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Kuntari, Kuntari, and Febi Indah Fajarwati. "Utilization of bamboo leaves wastes for methylene blue dye adsorption." In 2ND INTERNATIONAL CONFERENCE ON CHEMISTRY, CHEMICAL PROCESS AND ENGINEERING (IC3PE). Author(s), 2018. http://dx.doi.org/10.1063/1.5065022.

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Chunhui Fan, Nan Dang, and Hongrui Ma. "Adsorption of methylene blue from aqueous solutions onto fly ash." In 2011 International Symposium on Water Resource and Environmental Protection (ISWREP). IEEE, 2011. http://dx.doi.org/10.1109/iswrep.2011.5893705.

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Chao-chun Tang, Yong-bo Ao, Zhan-meng Liu, Lv Zhong, and Xiao Hu. "Study on static adsorption of methylene blue by aged-refuse." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5965867.

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Chao-chun Tang, Lv Zhong, Yong-bo Ao, Zhan-meng Liu, and Xiao Hu. "Study on dynamic adsorption of methylene blue by aged-refuse." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5965089.

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Huyen, Nguyen Thi My, Pham Thi Thuy Trang, Nguyen Minh Dat, and Nguyen Huu Hieu. "Synthesis of chitosan/graphene oxide nanocomposites for methylene blue adsorption." In INTERNATIONAL CONFERENCE ON CHEMICAL ENGINEERING, FOOD AND BIOTECHNOLOGY (ICCFB2017): Proceedings of the 3rd International Conference on Chemical Engineering, Food and Biotechnology. Author(s), 2017. http://dx.doi.org/10.1063/1.5000181.

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Rosa, G. S., B. D. Zorzi, K. Machry, P. Krolow, C. M. Moura, and E. G. Oliveira. "Experimental investigation of drying of malt bagasse." In 21st International Drying Symposium. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7785.

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The aim of this work was to investigate the convective drying process of malt bagasse and to evaluate the influence of this process on the application of this residue as adsorbent in methylene blue removel by adsorption process. The experimental system for drying was a fixed bed dryer with parallel airflow, with operating conditions: air temperature in the range of 40 to 90 oC and air veocity of 2 m/s. The adsorption experiments were perfomed with solution of methylene blue at 70 ppm concentration. The drying kinetics showed a constant drying rate period followed by a falling drying rate. The results obtained for the dye removal efficiency were 56% for in natura sample and in the range of 81.69% to 93.99% for dried samples.Keywords: dryin; malt bagasse; adsorption
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Reports on the topic "Adsorption of methylene blue"

1

Vassileva, Paunka, Dimitrinka Voykova, Ivan Uzunov, and Snejanka Uzunova. Methylene Blue Adsorption by Triticum monococcum L. Husks Based Materials. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, September 2018. http://dx.doi.org/10.7546/crabs.2018.09.05.

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Liu, Hongjin, Mingshuai Sun, Liyuan Liu, Zhengheng Yu, Qian Liu, Yuanjia Cheng, Ling Xu, Yinhua Liu, and Jingming Ye. The Using of Methylene Blue Dye combined with Other Tracer in Sentinel Lymph Node Biopsy of Early Breast Cancer: A Meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, May 2021. http://dx.doi.org/10.37766/inplasy2021.5.0107.

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