|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
Peer-reviewed Journal Articles, etc >
Adsorption of Heavy Metal Ions to Floc-Type Biosorbents
| 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)
|
Submitter: 関 秀司
|
