Journal of Soil and Groundwater Environment (한국지하수토양환경학회지:지하수토양환경)

Korean Society of Soil and Groundwater Environment (한국지하수토양환경학회)
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Oxidative-Coupling Reaction of Aromatic Compounds by Mn Oxide and Its Application for Contaminated Soil Remediation

망간산화물에 의한 방향족 유기화합물의 산화-공유결합반응 및 이를 이용한 오염토양 정화기법

  • Kang, Ki-Hoon (Technology Research Institute, Dealim Industrial Co., Ltd.) ;
  • Shin, Hyun-Sang (Department of Environmental Engineering, Seoul National University of Technology) ;
  • Nam, Kyoung-Phile (School of Civil, Urban and Geosystem Engineering, Seoul National University)
  • 강기훈 (대림산업(주) 기술연구소) ;
  • 신현상 (서울산업대학교 환경공학과) ;
  • 남경필 (서울대학교 지구환경시스템공학부)
  • Published : 2007.10.31
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Abstract

Immobilization of contaminants in subsurface environment is one of the major processes that determine their fate. Especially, immobilization by oxidative-coupling reactions, which is irreversible in the bio-chemical reactions and results in a significant reduction of toxicity, can be successfully applied for the remediation of contaminated soil and groundwater more effectively than conventional degradation. As a catalyst of this oxidative-coupling reaction, manganese oxide has many advantages in practical aspects as compared to microorganisms or oxidoreductive enzymes extracted from microorganisms, fungi, or plants. This paper is to present recent research achievements on the treatment mechanisms of various organic contaminants by manganese oxide. Especially, treatment methods of non-reactive organic compounds to Mn oxide are the main focus; i.e., application of reaction mediator, PAHs treatment method, combination with an appropriate pretreatment such as reduction using $Fe^0$, which suggests the potential of a wide range of engineering application. Concerning the natural carbon cycle processes, immobilization and stabilization by oxidative coupling reaction can be effectively applied as a environmentally-friend remediation method especially for aromatic contaminants which possess a high resistance to degradation.

토양환경내 오염물질의 고정화 현상은 오염물질의 거동을 결정하는 주요 과정중 하나이다. 특히 생물화학적 반응에 대해 비가역적이며, 이로부터 오염물질의 독성도 동시에 제거되는 산화-공유결합반응에 의한 고정화 반응은 오염물질의 주요한 자연정화 메커니즘중 하나일 뿐만 아니라, 이를 공학적으로 응용함으로써 기존의 분해에 의존해 오던 정화 방법에 비해 보다 효과적으로 오염토양 및 지하수의 복원에 적용될 수 있다. 특히 이러한 산화-공유결합반응을 일으키는 촉매로서의 역할을 하는 망간산화물은 미생물 자체, 혹은 미생물을 포함한 균류, 식물체 등으로부터 추출한 산화-환원 효소를 이용하는 것에 비해 실용적인 측면에서 많은 장점을 가지고 있다. 이에 본고에서는 망간산화물을 이용한 유기오염물질의 정화 기작에 대한 최근의 다양한 연구 결과들을 정리하였다. 특히 망간산화물에 대해 반응성을 가지지 않는 안정한 유기오염물의 처리를 위한 관련 연구로서 반응매개체를 적용한 사례와, PAHs 처리기법, $Fe^0$를 이용한 환원 전처리 등 적절한 전처리 기법과의 조합에 의한 처리방법 등에 대한 연구결과를 소개하였으며, 이로부터 보다 광범위한 적용 가능성을 제시하고자 하였다. 자연계 내에서 일어나는 탄소의 순환과정을 고려할 때 산화-공유결합 반응에 의한 고정화 및 안정화 반응은 특히 분해에 대해 높은 내성을 가지는 방향족 유기오염물질의 제거에 보다 효과적으로 적용될 수 있는 친환경적 기법으로 사용될 수 있을 것이다.

Keywords

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