Adsorption Thermodynamics and Kinetics of Malachite Green onto -Treated Fly Ash
Publication: Journal of Environmental Engineering
Volume 137, Issue 5
Abstract
Fly ash, an industrial by-product abundant in India, was treated with alkali and tested as a low-cost adsorbent for the removal of malachite green from an aqueous solution in a batch adsorption procedure. Effects of stirring rate, temperature, pH, initial dye concentration, contact time, and adsorbent dose were investigated. The adsorption was found to be strongly dependent on pH of the medium and the adsorption capacity decreased with an increase in temperature. The Langmuir isotherm model showed a good fit to the equilibrium adsorption data at all temperatures. The mean free energy () estimated from the Dubinin-Radushkevich model indicated that the adsorption mechanism was chemical ion exchange. The kinetic data were found to follow the pseudo second-order kinetic model. The rate constant decreased with the increase in temperature indicating the exothermic nature of adsorption. Intraparticle diffusion was not the sole rate-controlling factor. The Arrhenius and Eyring equations were used to evaluate the activation parameters. The activation energy () was estimated to be . Gibbs free energy () was spontaneous for all interactions, and the adsorption process exhibited exothermic enthalpy values. Results suggest that alkali-treated fly ash is a potential low-cost adsorbent for removal of malachite green from an aqueous solution.
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References
Anirudhan, T. S., and Radhakrishnan, P. G. (2008). “Thermodynamics and kinetics of adsorption of Cu(II) from aqueous solution onto a new cation exchanger derived from tamarind fruit shell.” J. Chem. Thermodyn., 40(4), 702–709.
Chen, K. C., Wu, J. Y., Yang, W. B., and Hwang, S. C. J. (2003). “Evaluation of effective diffusion coefficient and intrinsic kinetic parameters on azo dye biodegradation using PVA-immobilized cell beads.” Biotechnol. Bioeng., 83(7), 821–832.
Cheung, C. W., Porter, J. F., and Mckay, G. (2000). “Sorption kinetics for the removal of copper and zinc from effluents using bone char.” Sep. Purif. Technol., 19(1–2), 55–64.
Chowdhury, S., Mishra, R., Saha, P., and Kushwaha, P. (2011). “Adsorption thermodynamics, kinetics and isosteric heat of adsorption of malachite green onto chemically modified rice husk.” Desalin., 265(1–3), 159–168.
Chowdhury, S., and Saha, P. (2010). “Sea shell powder as a new adsorbent to remove basic green 4 (malachite green) from aqueous solutions: Equilibrium, kinetic and thermodynamic studies.” Chem. Eng. J. (London), 164(1), 168.
Crini, G., Peindy, H. N., Gimbert, F., and Robert, C. (2007). “Removal of C.I. basic green 4 (malachite green) from aqueous solution by adsorption using cyclodextrin-based adsorbent: Kinetic and equilibrium studies.” Sep. Purif. Technol., 53(1), 97–110.
Freundlich, H. M. F. (1906). “Over the adsorption in solution.” J. Phys. Chem., 57(A), 385–470.
Gupta, V. K., and Suhas (2009). “Application of low-cost adsorbents for dye removal—A review.” J. Environ. Manage., 90(8), 2313–2342.
Ho, Y. S. (2004). “Citiation review of Lagergren kinetic rate equation on adsorption reactions.” Scientometrics, 59(1), 171–177.
Ho, Y. S., and McKay, G. (1999). “Pseudo-second order model for sorption processes.” Process Biochem., 34(5), 451–465.
Hu, Z., Chen, H., Ji, F., and Yuan, S. (2010). “Removal of Congo Red from aqueous solution by cattail root.” J. Hazard. Mater., 173(1–3), 292–297.
Kundu, S., and Gupta, A. K. (2006). “Arsenic adsorption onto iron oxide-coated cement (IOCC): Regression analysis of equilibrium data with several isotherm models and their optimization.” Chem. Eng. J. (London), 122(1–2), 93–106.
Liu, Y., and Liu, Y.-J. (2008). “Biosorption isotherms, kinetics and thermodynamics.” Sep. Purif. Technol., 61(3), 229–242.
Langmuir, I. (1916). “The constitution and fundamental properties of solids and liquids.” J. Am. Chem. Soc., 38(11), 2221–2295.
Mohapatra, M., Khatun, S., and Anand, S. (2009). “Kinetics and thermodynamics of lead (II) adsorption on nickel ores of Indian origin.” Chem. Eng. J. (London), 155(1–2), 184–190.
Mondal, S. (2008). “Methods of dye removal from dye house effluent—An overview.” Environ. Eng. Sci., 25(3), 383–396.
Mungapati, V. S., Yarramuthi, V., Nadavala, S. K., Alla, S. R., and Abburi, K. (2010). “Biosorption of Cu(II), Cd(II) and Pb(II) by Acacia leucocephala bark powder: Kinetics, equilibrium and thermodynamics.” Chem. Eng. J. (London), 157(2–3), 357–365.
Nadeem, R., Nasir, M. H., and Hanif, M. S. (2009). “Pb(II) sorption by acidically modified Cicer arientium biomass.” Chem. Eng. J. (London), 150(1), 40–48.
Nathalie, C., Richard, G., and Eric, D. (2003). “Adsorption of Cu (II) and Pb (II) onto a grafted silica: Isotherms and kinetic models.” Water Res., 37(13), 3079–3086.
O’Mahony, T., Guibal, E., and Tobin, J. M. (2002). “Reactive dye biosorption by Rhizopus arrhizus biomass.” Enzyme Microbial Technol., 31(4), 456–463.
Saha, P., Chowdhury, S., Gupta, S., Kumar, I., and Kumar, R. (2010). “Assessment on the removal of malachite green using tamarind fruit shell as biosorbent.” CLEAN-Soil Air Water, 38(5-6), 437–445.
Saha, P., and Datta, S. (2009). “Assessment on thermodynamics and kinetics parameters on reduction of methylene blue dye using flyash.” Desalin. Water Treat., 12(1), 219–228.
Srivastava, A., Sinha, R., and Roy, D. (2004). “Toxicological effects of malachite green.” Aquatic Toxicol., 66, 319–329.
Tsai, W.-T., and Chen, H.-R. (2010). “Removal of malachite green from aqueous solution using low-cost chlorella-based biomass.” J. Hazard. Mater., 175(1–3), 844–849.
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Published In
Journal of Environmental Engineering
Volume 137 • Issue 5 • May 2011
Pages: 388 - 397
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Mar 29, 2010
Accepted: Nov 15, 2010
Published online: Nov 17, 2010
Published in print: May 1, 2011
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