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Optimization of methylene blue using Ca2+ and Zn2+ bio-polymer hydrogel beads: A comparative study

Kumar, Muthaiyan Kishore Punith and Tamilarasan, Rengasamy and Arthanareeswaran, Gangasalam and Ismail, Ahmad Fauzi (2015) Optimization of methylene blue using Ca2+ and Zn2+ bio-polymer hydrogel beads: A comparative study. Ecotoxicology And Environmental Safety, 121 . pp. 164-173. ISSN 0147-6513

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Official URL: http://dx.doi.org/10.1016/j.ecoenv.2015.04.007

Abstract

Recently noted that the methylene blue cause severe central nervous system toxicity. It is essential to optimize the methylene blue from aqueous environment. In this study, a comparison of an optimization of methylene blue was investigated by using modified Ca2+ and Zn2+ bio-polymer hydrogel beads. A batch mode study was conducted using various parameters like time, dye concentration, bio-polymer dose, pH and process temperature. The isotherms, kinetics, diffusion and thermodynamic studies were performed for feasibility of the optimization process. Freundlich and Langmuir isotherm equations were used for the prediction of isotherm parameters and correlated with dimensionless separation factor (RL). Pseudo-first order and pseudo-second order Lagegren's kinetic equations were used for the correlation of kinetic parameters. Intraparticle diffusion model was employed for diffusion of the optimization process. The Fourier Transform Infrared Spectroscopy (FTIR) shows different absorbent peaks of Ca2+ and Zn2+ beads and the morphology of the bio-polymer material analyzed with Scanning Electron Microscope (SEM). The TG & DTA studies show that good thermal stability with less humidity without production of any non-degraded products.

Item Type:Article
Uncontrolled Keywords:calcium, hydrogel, methylene blue, optimization, polymer composite beads, zinc
Subjects:A General Works
ID Code:58723
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:21 May 2017 12:50

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