期刊
PROCESS BIOCHEMISTRY
卷 40, 期 12, 页码 3675-3679出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.procbio.2005.03.066
关键词
biosorption; Microcystis aeruginosa; lead; cadmium; mercury; competitive sorption
Immobilized Microcystis aeruginosa in a flow-through sorption column was evaluated for the potential to remove Pb2+ Cd2+ and Hu(2+) from aqueous solutions. M. aeruginosa showed high affinity for the three heavy metals with removal efficiency of 90% for Cd2+ and Hg2+, and 80% for Pb2+ at saturation conditions. Competitive sorption experiments conducted in paired and ternary systems indicated that Pb2+, was sequestered preferentially over Cd2+ and Hg2+. The presence of Cd2+ interfered only slightly with the uptake of Hg2+, as Ph2+ and Hg2+ did with Cd2+ In contrast, H sorption was affected by Pb2+ to a great extent. Desorption with I M HCl was completed within 25 min with high efficiency and effectiveness for the three metals. The results of this study indicate that M. aeruginosa is to be a potential biosorbent material except when Hg2+ and Pb2+ are in the same contaminated solution. (c) 2005 Elsevier Ltd. All rights reserved.
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