Cadmium recovery by a sulfate-reducing magnetotactic bacterium, Desulfovibrio magneticus RS-1, using magnetic separation

Atsushi Arakaki, Haruko Takeyama, Tsuyoshi Tanaka, Tadashi Matsunaga

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)833-840
Number of pages8
JournalApplied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology
Volume98-100
DOIs
Publication statusPublished - 2002 May 11

    Fingerprint

Keywords

  • Bioremediation
  • Cadmium, magnetic separation
  • Desulfovibrio magneticus
  • Sulfate-reducing magnetotactic bacterium

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology

Cite this