In this study papaya seeds were used to remove methylene blue dye from aqueous solution. Papaya seeds were characterized as possessing a macro/mesoporous texture and large pore size. Studies were carried out in batches to evaluate the effect of contact time and pH (2–12) on the removal of dye. It was observed that the adsorption of dye was better in the basic region (pH 12). The equilibrium data were analyzed using Langmuir, Freundlich, Dubinin–Raduschkevich, Tempkin, Jovanovich, Redlich–Peterson, Sips, Toth and Radke–Prausnitz isotherms. The equilibrium data were best described by the Langmuir isotherm with a maximum adsorption capacity of 637.29 mg g–1. Adsorption kinetic data were fitted using the pseudo-first-order and pseudo-second-order model. The adsorption kinetic is very fast and was best described by the pseudo-second-order model.
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Research Article|
July 01 2013
Use of papaya seeds as a biosorbent of methylene blue from aqueous solution
Diego S. Paz;
Diego S. Paz
1Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
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Alexandre Baiotto;
Alexandre Baiotto
1Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
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Marcio Schwaab;
Marcio Schwaab
1Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
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Marcio A. Mazutti;
Marcio A. Mazutti
1Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
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Mariana M. Bassaco;
Mariana M. Bassaco
1Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
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Daniel A. Bertuol;
Daniel A. Bertuol
1Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
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Edson L. Foletto;
Edson L. Foletto
1Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
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Lucas Meili
2Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas, Maceió-AL, 57072-970, Brazil
E-mail: lucas.meili@ctec.ufal.br
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Water Sci Technol (2013) 68 (2): 441–447.
Article history
Received:
January 01 2013
Accepted:
February 13 2013
Citation
Diego S. Paz, Alexandre Baiotto, Marcio Schwaab, Marcio A. Mazutti, Mariana M. Bassaco, Daniel A. Bertuol, Edson L. Foletto, Lucas Meili; Use of papaya seeds as a biosorbent of methylene blue from aqueous solution. Water Sci Technol 1 July 2013; 68 (2): 441–447. doi: https://doi.org/10.2166/wst.2013.185
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Diego S. Paz, Alexandre Baiotto, Marcio Schwaab, Marcio A. Mazutti, Mariana M. Bassaco, Daniel A. Bertuol, Edson L. Foletto, Lucas Meili; Use of papaya seeds as a biosorbent of methylene blue from aqueous solution. Water Sci Technol 1 July 2013; 68 (2): 441–447. doi: https://doi.org/10.2166/wst.2013.185
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