The study of an azo dye removal from liquid medium by modified clay

Yusef Omidi-Khaniabadi
Ali Jafari
Mehdi Jourvand
Sedigheh Saeedi
Hassan Basiri
Heshmatollah Nourmoradi
Gholamreza Goudarzi
Ali Mirza-Heidari
Seyed Mohammad Daryanoosh
Bahram Kamarehei
Shahram Sadeghi
Mohammad Javad Mohammadi

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Publication date

January 2016

DOI

10.22102/jaehr.2016.40214

Publisher

Kurdistan University of Medical Sciences

Journal

2345-3990

Abstract

In this batch study, montmorillonite was modified by a cationic surfactant [hexadecyltrimethylammonium bromide (HDTMA-MMT)] and used as sorbent to remove bromocresol green (BCG) from aqueous solutions. The effect of several factors such as surfactant loading rate onto the clay, contact time, pH, adsorbent dosage, dye concentration, and ion strength were investigated on the sorption. The equilibrium time for BCG sorption was reached at contact time of 20 minutes. Fitting the experimental data to different kinetic and isotherm models showed that the experimental data are well described by pseudo-second-order kinetic (R2 > 0.99) and Freundlich isotherm (R2 > 0.99) models. According to the results of this study, HDTMA-MMT can be considered as a...