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Biosorption of zinc(II) ions onto powdered waste sludge (PWS): Kinetics and isotherms

Paper ID Volume ID Publish Year Pages File Format Full-Text
18628 42728 2006 6 PDF Available
Title
Biosorption of zinc(II) ions onto powdered waste sludge (PWS): Kinetics and isotherms
Abstract

Waste sludge samples obtained from a paint industry wastewater treatment plant was dried, ground and pre-treated with 1% H2O2 to improve the biosorption capacity. The powdered waste sludge (PWS) was sieved to different mesh sizes and used for biosorption of zinc(II) ions from aqueous solution. Kinetics of zinc biosorption onto PWS was investigated by using the PWS samples with particle size of 64 μm. The pseudo-first and -second order rate expressions were used to correlate the experimental data. The kinetic constants were determined for both models and the second order rate expression was found to be more suitable. Three different biosorption isotherms were used to correlate the equilibrium biosorption data and the isotherm constants were determined. The Langmuir isotherm was found to fit the experimental data better than the other isotherms tested. Maximum biosorption capacity was found to be 82 mg Zn g PAS−1. High biosorption capacity and low saturation constant of pre-treated PWS used for zinc ion biosorption makes the adsorbent more attractive as compared to other alternatives.

Keywords
Biosorption; Isotherms; Kinetics; Powdered waste sludge (PWS); Zinc(II) ions
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Biosorption of zinc(II) ions onto powdered waste sludge (PWS): Kinetics and isotherms
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 38, Issue 5, 2 March 2006, Pages 705–710
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