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Treatment of nickel containing electroplating effluents with Sargassum wightii biomass

Paper ID Volume ID Publish Year Pages File Format Full-Text
36614 45138 2006 7 PDF Available
Title
Treatment of nickel containing electroplating effluents with Sargassum wightii biomass
Abstract

Two electroplating industrial effluents containing 109 and 52 mg Ni/l, respectively, were treated using Sargassum wightii biomass in batch and column operations. Potentiometric titrations revealed S. wightii contains 2.1 mmol/g of binding sites and has pKa values of 4.3 and 8.8. For both effluents, the pH effect on nickel uptake was not well pronounced at higher pH values. Langmuir, Freundlich, Redlich–Peterson and Sips models were used to describe the biosorption isotherm data. The elution efficiency for Ni-desorption from S. wightii was determined for HCl, H2SO4, HNO3, CaCl2, MgCl2, NaCl, KCl, NH4Cl, NaOH, KOH, NH4OH and EDTA (Na). Among these elutants, 0.1 M CaCl2 (in HCl, pH 2.5) exhibited elution efficiencies greater than 98% and also not markedly affected the biomass. The ability of S. wightii to biosorb nickel from effluents was investigated in a packed column. The presence of excess co-ions in effluent-1 affected the nickel uptake by S. wightii biomass. The Sargassum bed exhibited uptakes of 37.2 and 38.6 mg Ni/g from effluent-1 and effluent-2, respectively, under full column saturation. The data from five regeneration cycles evidenced that reusability of S. wightii biomass in the treatment of nickel-bearing electroplating effluents is viable.

Keywords
Waste treatment; Biosorption; Packed column; Elution; Regeneration
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Treatment of nickel containing electroplating effluents with Sargassum wightii biomass
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 4, April 2006, Pages 853–859
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