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Repeated removal of cadmium and zinc from an industrial effluent by waste biomass Sargassum sp.

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Abstract

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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Authors and Affiliations

  1. Cidade Universitária, Centro de Tecnologia, Escola de Química, Universidade Federal do Rio de Janeiro, Brazil

    A.J.P. Esteves, E. Valdman & S.G.F. Leite

  2. Bloco E, Rio de Janeiro, 21941-900, Brazil

    A.J.P. Esteves, E. Valdman & S.G.F. Leite

Authors
  1. A.J.P. Esteves
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  2. E. Valdman
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  3. S.G.F. Leite
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Esteves, A., Valdman, E. & Leite, S. Repeated removal of cadmium and zinc from an industrial effluent by waste biomass Sargassum sp.. Biotechnology Letters 22, 499–502 (2000). https://doi.org/10.1023/A:1005608701510

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  • DOI: https://doi.org/10.1023/A:1005608701510

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