Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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점토로부터 철불순물의 생물학적 제거에 미치는 탄소원의 영향

  • Lee, Eun-Young (Department of Biological Sciences, Ewha Womans University) ;
  • Cho, Kyung-Suk (Department of Environmental Engineering, Ewha Womans University) ;
  • Ryu, Hee-Wook (Department of Chemical Engineering, Soong Sil University) ;
  • Bae, Moo (Department of Biological Sciences, Ewha Womans University)
  • 이은영 (이화여자대학교 생물과학과) ;
  • 조경숙 (이화여자대학교 환경공학과) ;
  • 류희욱 (숭실대학교 화학공학과) ;
  • 배무 (이화여자대학교 생물과학과)
  • Published : 1997.12.01
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Abstract

Fe (III) impurities in clay could be microbially removed by inhabitant dissimilatory Fe (III) reducing microorganisms. Insoluble Fe (III) in clay particles was leached out as soluble reductive form, Fe (II). The microorganisms removed from 10 to 45% of the initial Fe (III) when each sugar was supplemented to be in ranges of 1 - 5 % (w/w; sugar/clay). The microorganisms reduced 2.1 - 12.8 mol of Fe (III) per 100 mol of carbon in sugars metabolized when sugars such as glucose, maltose, and sucrose were used as sole carbon source. Bacillus sp. IRB-W and Pseudomonas sp. IRB-Y were isolated from the enrichment culture of the clay. The isolates were considered to participate in metabolizing organic compounds to fermentative intermediates with relatively little Fe (III) reduction at initial Fe (III) reduction process. By the microbial treatment, the whiteness of the clay was increased form 63.20 to 79.64, whereas the redness was obviously decreased form 13.47 to 3.55. This treatment did not cause any unfavorable modifications in mineralogical compositions of the clay.

Keywords

References

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