Dye removal from artificial wastewater using heterogeneous bio-fenton system
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2017
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Shojaat, R.
Karimi, A.
Saadatjoo, N.
Aber, S.
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Chemical Industry and Chemical Engineering Quarterly, 2017; 23(4):447-456
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In the present study, GOx/MnFe₂O₄/calcium alginate nano-composite was prepared by the trapping enzyme/nanoparticles in calcium alginate. The prepared absorbent was applied for decolorization of artificial dye wastewater of acid red 14 (AR14) by heterogeneous bio-Fenton system. Kinetic and isotherm studies were carried out. The decolorization of acid red 14 followed the Michaelis- Menten, pseudo-first order and pseudo-second order kinetic models. Good correlation coefficients were obtained by fitting the experimental data to Michaelis- Menten and pseudo-second order kinetic models. The adsorption isotherms were described by Langmuir, Freundlich and Temkin isotherms. Among the three isotherm models, the Freundlich model was fitted with the equilibrium data obtained from adsorption of AR14 onto MnFe₂O₄/calcium alginate; while Temkin isotherm gave the best correlation for adsorption on MnFe₂O₄ nanoparticles. The effect of various parameters such as initial pH of solution, initial dye concentration, and contact time on the adsorption of AR14 on MnFe₂O₄ and MnFe₂O₄/ /calcium alginate as well as dye enzymatic decomposition was studied. The decolorization of AR14 with initial concentration of 10 mg.L−1 by using GOx/ /MnFe₂O₄/calcium alginate was 60.17%.
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Copyright 2017 Chemical Industry & Chemical Engineering Quarterly