Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Recent Development of Removal and Treatment of Toxic Heavy Metals by Microorganisms

유독 중금속 오염물질 처리를 위한 미생물균주의 최근 이용 및 개발

  • 방상원 (한양대학교 자연과학대학 생명과학과) ;
  • 최영길 (한양대학교 자연과학대학 생명과학과) ;
  • 한명수 (한양대학교 자연과학대학 생명과학과)
  • Published : 2001.06.01
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Abstract

There are several ways to remove and treat toxic heavy metals in the environment: chemical, physical and biological ways. The biological treatment utilizes the natural reactions of microorganisms living in the environments. These reactions include biosorption and bioaccumulation, oxidation and reduction, methylation and demethylation, metal - organic complexation and insoluble complex formation. The biological reactions provide a crucial key technology in the remediation of heavy metal-contaminated soils and waters. According to recent reports, various kinds of heavy metal species were removed by microorganisms and the new approaches and removal conditions to remediate the metals were also tried and reported elsewhere. This was mostly carried out by microorganisms such as fungi, bacteria and alga. In addition, a recent development of molecular biology shed light on the enhancing the microorganism's natural remediation capability as well as improving the current biological treatment.

중금속을 처리하는 방법에는 일반적으로 화학적, 물리적 그리고 생물학적 처리방법 등이 있다. 이중 생물학적 처리방법은 미생물들의 자연 생체기작을 이용하는 방법으로, 생체축적 (biosorption & bioaccumulation), 산화환원반응 (oxidation & reduction), 메칠화 및 탈메칠화반응 (methylation & demethylation), 금속 유기물질 복합반응 (metal-organic complexation)과 비용해성 복합체형성 (insoluble complex formation) 등의 기작을 이용한 방법이다. 이런 중금속에 대한 생물학적 기작들은 중금속으로 오염된 환경을 복원시키는 데에 중요한 기술기반을 제공한다. 최근 금속의 종류와 미생물균주의 종류와 조건 그리고 오염환경에 따른 다양한 방법의 중금속 처리들이 제시되었고, 이는 주로 곰팡이, 박테리아, 조류(algae) 등을 이용한 방법들이다. 또한 분자생물학의 발전과 더불어 중금속 제거능력을 배가시킨 균주의 최근 개발시도는 기존의 생물학적 처리방법을 개량 발전시킬 수 있는 가능성을 제시하고 있다.

Keywords

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