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

Document Type : Original Article


1 Health and Care system of Karron, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

2 Assistant Professor, Lorestan University of Medical Sciences, Khorramabad, Iran

3 Department of Environmental Health Engineering, School of Health, Lorestan University of Medical Sciences, Khorramabad, Iran

4 Sama Technical and Vocational College, Izeh Branch, Islamic Azad University, Izah, Iran

5 Department of Environmental Health Engineering, School of Health, Ilam University of Medical Sciences, Ilam, Iran

6 Environmental Technologies Research Center (ETRC), Jundishapur University of Medical Sciences, Ahvaz, Iran

7 Health Care System of Karoon, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

8 Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran

9 Abadan School of Medical Sciences, Abadan, Iran


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 low-cost, eco-friendly, and highly effective option for the sorption of BCG from aqueous solutions.


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