期刊
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
卷 98, 期 -, 页码 833-840出版社
SPRINGER
DOI: 10.1385/ABAB:98-100:1-9:833
关键词
Desulfovibrio magneticus; sulfate-reducing magnetotactic bacterium; cadmium; magnetic separation; bioremediation
Cadmium recovery by a sulfate-reducing magnetotactic bacterium, Desulfovibrio magneticus strain RS-1, was investigated. D. magneticus precipitated >95% of cadmium at an initial concentration of 1.3 ppm in the growth medium. Electron microscopic analysis revealed that D. magneticus formed electron-dense particles on its surface when cultivated in the presence of cadmium ions (Cd2+). Sulfide was also found in the precipitate, and the composition ratio of sulfide/cadmium was 0.7. Sixty percent of viable RS-1 cells was recovered by a simple magnetic separation revealing the removal of 58% cadmium from the culture medium.
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