Journal
BIOTECHNOLOGY LETTERS
Volume 22, Issue 6, Pages 499-502Publisher
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1005608701510
Keywords
biosorption; cadmium; desorption; Sargassum; zinc
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Waste biomass Sargassum sp. biosorbed 100% of Cd2+ and 99.4% of Zn2+ from a 3 and 98 mg l(-1) solution (pH 4.5), respectively, at the end of four serial experiments. Of the five desorbents studied in consecutive adsorption/desorption cycles, CaCl2 0.05 M eluted nearly 40% of both metals and decreased the biosorption in only 8% and 17% of Cd2+ and Zn2+, respectively. Although NaOH desorbent improved the heavy metal uptake from the second cycle onwards, it did not elute metals from the pre-loaded biomass.
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