Rapid Adsorption Of Malachite Green Dye Using Eco-friendly Fe (III) - Montmorillonite: Effective Clay Mineral For Dye Effluents Containing Wastewater

¹Department of Industrial Chemistry, Kuvempu University, Shankaraghatta, 577451, India

²Frontier Research Center for Post-genome Science and Technology, Hokkaido University, Sapporo 0010021, Japan

³International Centre for Materials Science, JNCASR, Banglore, 560064, India

Adv. Mater. Lett., 2017, 8 (1), pp 49-57

DOI: 10.5185/amlett.2017.6370

Publication Date (Web): Nov 12, 2016

Copyright © IAAM-VBRI Press

E-mail: hsb_naik@rediffmail.com

Abstract

Herein we reported the malachite green dye removal by Fe(III)−Mt through adsorption process under ambient conditions. The amount of MG dye removal by Fe(III)–Montmorillonite(Fe(III)–Mt) was estimated from its optical density at l_max = 617 nm using UV-Vis spectrophotometer. The MG dye removal was found to be rapid at basic pH and increased further with temperature up to 50°C. At pH 7 & 8, a complete reduction (100%) was observed within 5 min and 7 min, whereas at pH 4 & 5, it took 10 min &15 min respectively. The time taken for complete reduction at 0°C, RT (30°C) and 50°C were 10, 7 and     5 min respectively. The removal followed by adsorption of dye molecules on the spent clay mineral was evident from FESEM/EDX analysis. More importantly, Fe(III)–Mt could be separated and retrieved easily after the reaction by centrifugation from the degraded MG dye solution. The experimental results of MG dye removal from Fe(III)–Mt follows the pseudo first order kinetics. We believe that Fe(III)–Mt could be the efficient and suitable material to augment the real filed applications. This study provides a new avenue to gain in-depth insight to the applications of Fe(III)–Mt as an effective clay mineral for remediation of dye effluents. Overall Fe(III)–Mt bears the capability for environmental remediation in relation to the dye pollution.

Keywords

Fe(III)&ndash,montmorillonite, malachite green, remediation, adsorption.