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Adsorption of Heavy Metal Ions to Floc-Type Biosorbents

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Title: Adsorption of Heavy Metal Ions to Floc-Type Biosorbents
Authors: Seki, Hideshi Browse this author →KAKEN DB
Suzuki, Akira Browse this author
Keywords: biosorbent
micro-organisms
protein
immobilization
heavy metals
Issue Date: 15-May-2002
Publisher: Elsevier
Journal Title: Journal of Colloid and Interface Science
Volume: 249
Issue: 2
Start Page: 295
End Page: 300
Publisher DOI: 10.1006/jcis.2002.8297
PMID: 16290600
Abstract: Adsorption of cadmium and lead ions to floc-type biosorbents was reported in this work. Two types of biosorbents containing a marine microalga, Heterosigma akashiwo (Hada) Hada or a purple non-sulfur bacterium, Rhodobacter sphaeroides were prepared. The microorganisms inactivated by steam sterilization were immobilized in casein floc and cross-linked with glutaraldehyde. In the present immobilizing method, we obtained the biosorbents comprising as much as 67% of microorganism on a dry-weight basis. Simple metal binding models were applied to explain the adsorption mechanism of bivalent metal ions to the biosorbents. The results showed that casein acted as both the immobilizing material and the adsorbent material. The adsorption of bivalent metal ions to the biosorbents was due to bidentate binding to the acidic sites on casein and monodentate binding to the acidic sites on microorganisms. The metal binding constants and the binding capacities of microorganisms were scarcely influenced by immobilization.
Type: article (author version)
URI: http://hdl.handle.net/2115/44073
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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