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Adsorption isotherms and kinetics for the removal of triclosan and methyl triclosan from wastewater using inactivated dried sludge

Paper ID Volume ID Publish Year Pages File Format Full-Text
34153 45005 2016 9 PDF Available
Title
Adsorption isotherms and kinetics for the removal of triclosan and methyl triclosan from wastewater using inactivated dried sludge
Abstract

•Adsorption of triclosan and methyl triclosan to biological sludge was investigated.•The Linear and Freundlich isotherms were able to describe the sorption system well.•The adsorption systems followed pseudo second order kinetic model.•Inactivated dried sludge showed promising results for removal of TCS and MTCS.

Biosorption equilibrium and kinetics of TCS and MTCS sorption to inactivated dried sludge were studied in a batch system with respect to pH, temperature and sludge concentration. Linear and Freundlich isotherms were able to describe the adsorption system well. Sorption capacity increased from 4.80 to 7.36 μg/g and 6.28 to 7.76 μg/g for TCS and MTCS, respectively with an increase in temperature from 15 to 35 °C. As pH decreased from 11.0 to 5.0, the sorption capacity of TCS and MTCS enhanced from 4.36 to 7.92 μg/g and 5.52 to 7.52 μg/g, respectively. The distribution coefficient for MTCS was higher than that for TCS due to hydrophobicity. The calculated Kf and 1/n implied that the adsorption process was physiosorption and exothermic in nature involving weak forces such as Van der Waal’s interactions. In the kinetic study, adsorption of TCS and MTCS to dried sludge predominantly followed a pseudo-second order kinetic over the range of applied initial concentrations based on regression coefficients and the relative error for the calculated equilibrium sorption capacity. IR analysis of sludge showed the presence of various polar groups that could highly affect the sorption of organic pollutants.

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Keywords
Triclosan; Methyl triclosan; Adsorption; Kinetics modeling; Freundlich; Langmuir
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Adsorption isotherms and kinetics for the removal of triclosan and methyl triclosan from wastewater using inactivated dried sludge
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 51, Issue 8, August 2016, Pages 1069–1077
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us