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Effect of the presence of lead on the biosorption of copper, cadmium and nickel by anaerobic biomass

Paper ID Volume ID Publish Year Pages File Format Full-Text
35720 45103 2007 7 PDF Available
Title
Effect of the presence of lead on the biosorption of copper, cadmium and nickel by anaerobic biomass
Abstract

Heavy metals are toxic pollutants released into the environment as a result of industrial, mining and agricultural activities. The biosorption of Pb, Cu, Cd, and Ni from single and binary metal systems were studied in equilibrium systems and in a flow-through column packed with a calcium-saturated anaerobic sludge biosorbent, respectively. The single-metal sorption uptake capacity of the biomass for Pb was slightly inhibited by the presence of Cu and Cd cations (by 6%) and by the presence of nickel (by 11%). The affinity order of anaerobic biomass for the four metals was established as: Pb > Cu > Ni > Cd. Factors such as hydration effects, hydrolysis effects and covalent binding of the metal ions may contribute to this result. By studying the breakthrough curves obtained from a fixed bed column fed with an equimolar mixture of Pb, Cd, Cu, and Ni, it was determined that lead was the last metal to break through the column at the 150 bed volume mark compared to 4, 15, 30 bed volume marks for Ni, Cd, and Cu, respectively.

Keywords
Biosorption; Heavy metals; Anaerobic granular biomass; Wastewater treatment; Sorption competition
First Page Preview
Effect of the presence of lead on the biosorption of copper, cadmium and nickel by anaerobic biomass
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 11, November 2007, Pages 1546–1552
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering