한국환경과학회지 (Journal of Environmental Science International)

  • 제31권1호
  • /
  • Pages.77-85
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  • 2022
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  • 1225-4517(pISSN)
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  • 2287-3503(eISSN)
한국환경과학회 (The Korean Environmental Sciences Society)
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영가금속을 이용한 불포화대에서 유기물질의 환원적 분해

Reduction of Organics in an Unsaturated Zone Using Zero-Valent Metals

  • 김종건 (국립안동대학교 환경공학과) ;
  • 권희원 (국립안동대학교 환경공학과) ;
  • 김정진 (국립안동대학교 지구환경과학과) ;
  • 황인성 (부산대학교 환경공학과) ;
  • 김영훈 (국립안동대학교 환경공학과)
  • Kim, Jong-Gun (Department of Environmental Engineering, Andong National University) ;
  • Kwon, Hee-won (Department of Environmental Engineering, Andong National University) ;
  • Kim, Jeong-Jin (Department of Environmental Earth and Science, Andong National University) ;
  • Hwang, In-Seong (Department of Environmental Engineering, Pusan National University) ;
  • Kim, Young-Hun (Department of Environmental Engineering, Andong National University)
  • 투고 : 2021.12.27
  • 심사 : 2022.01.21
  • 발행 : 2022.01.31
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초록

Environmental contamination by organic compounds are not only restricted to water, but extends to soil and groundwater as well. However, highly oxidized compounds, such as halogenated organics and nitro-compounds, can be detoxified employing reducing methods. Permeable reactive barrier is one of the representative technologies where zero-valent metals (ZVMs) are employed for groundwater remediation. However, organics contaminates often contaminate the unsaturated zone above the groundwater. Despite the availability of technologies like soil vapor extraction and bioremediation, removing organic compounds from this zone represents several challenges. In this study, the reduction of nitrobenzene to aniline was achieved using zero-valent iron (ZVI) under unsaturated conditions. Results indicated that the water content was an important variable in this reaction. Under dry conditions (water content = 0.2%), the reduction reaction was inhibited; however, when the water content was between 10% and 25% (saturated condition), ZVI can reduce nitrobenzene. Palladized iron (Pd/Fe) can be used to reduce nitrobenzene when the water content is between 2.5% and 10%. The reaction was evaluated over a wide range of temperatures (10 - 40 ℃), and the results indicated that increasing the temperature resulted in increased reaction rates under unsaturated conditions.

키워드

과제정보

본 연구는 환경산업기술원의 연구비 지원(KEITI 2019002480004)으로 수행되었습니다.

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