Treatment of Textile Waste Water by Adsorption Using Granular Activated Carbon Along with Isotherm Modeling and Kinetics

Ayesha S. Sharna¹, F. Nargis¹, S. Ahmed², M. S. Islam^1*

1. ¹Department of Chemical Engineering, Bangladesh University of Engineering & Technology, Dhaka-1000, Bangladesh
2. ²Department of Civil Engineering, Bangladesh University of Engineering & Technology, Dhaka-1000, Bangladesh

Published in The Second NZAAR International Event Series on Natural and Built Environment, Cities, Sustainability and Advanced Engineering, Kuala Lumpur, Malaysia, 8 December 2016, pages 149 to 159. New Zealand Academy of Applied Research. ISSN 2463-5979 (online), 2463-5960 (print).

Abstract

Textile industries are one of the major polluters in recent times. These industries produce huge amount of waste water which are highly in need of proper treatment. The project focuses on the treatment of textile waste and dyes with Granular Activated Carbon (GAC) by adsorption process. After treatment with 4g GAC/L wastewater, the Chemical Oxygen Demand (COD) of sample waste water reduced almost 65%. A huge change was also found in the physical appearance of the sample water. After treatment almost 86% color was gone. The pH also increased by about 5%. Four isotherm models-Linear, Langmuir, Freundlich and Temkin were studied. Linear isotherm showed the best fitting with the equilibrium data in terms of the coefficient of determination (R2). In the kinetics study, pseudo first-order, pseudo second-order, Elovich’s equation and intra particle diffusion kinetic models were studied. Elovich’s equation well fit the experimental data.

Keywords: Adsorption-isotherm; Adsorption-kinetics; Granular activated carbon; Textile wastewater; Dyestuffs

Rights

Copyright © New Zealand Academy of Applied Research Ltd 2016. All rights reserved. Reproduced in the GDI Academy archive from the original proceedings without change to the authors’ text.