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

Arakaki, Atsushi; Takeyama, Haruko; Tanaka, Tsuyoshi; Matsunaga, Tadashi

Arakaki, Atsushi; Takeyama, Haruko; Tanaka, Tsuyoshi; Matsunaga, Tadashi.

Afiliación

Arakaki A; Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Japan.

Appl Biochem Biotechnol ; 98-100: 833-40, 2002.

Article en En | MEDLINE | ID: mdl-12018305

RESUMEN

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.

Asunto(s)

Cadmio/aislamiento & purificación; Cadmio/farmacología; Desulfovibrio/metabolismo; Magnetismo; Sulfatos/metabolismo; Calcio/farmacología; Fraccionamiento Celular; Medios de Cultivo; Desulfovibrio/efectos de los fármacos; Desulfovibrio/crecimiento & desarrollo; Desulfovibrio/ultraestructura; Cinética; Microscopía Electrónica; Oxidación-Reducción

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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Sulfatos / Cadmio / Desulfovibrio / Magnetismo Idioma: En Revista: Appl Biochem Biotechnol Año: 2002 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos

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