Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 53, Issue 11, Pages 1760-1776Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2018.1440305
Keywords
Sorption; biodegradation; isotherm; kinetics; dyes; activated sludge
Funding
- National Science Foundation Industry/University Cooperative Research Center for Membrane Science, Engineering and Technology
- National Science Foundation [IIP 1361809]
- University of Arkansas
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A systematic investigation was carried out for demonstrating the simple and cost-effective removal of toxic dyes using activated sludge from municipal wastewater. The sorption process was found to follow Freundlich isotherm and pseudo-second-order rate kinetics. Difference in sorption efficiency for activated and deactivated sludge in aerobic and anaerobic conditions revealed the involvement of different microorganism in sorption process with the indication of biodegradation. The sorption process was found to be spontaneous but entropy driven for Remazol Brilliant Blue R and Eriochrome Black T while enthalpy driven for Congo Red. The process was established to be a combination of adsorption as well as biodegradation.
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