Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Improving the Reactivity and Harmlessness of Recalcitrant Contaminants by Reduction-oxidation-linked Process

환원-산화 연계처리를 통한 니트로벤젠의 반응성 향상 및 무해화 연구

  • Kwon, Hee-Won (Department of Environmental Engineering, Andong National University) ;
  • Hwang, Inseong (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Kim, Young-Hun (Department of Environmental Engineering, Andong National University)
  • 권희원 (안동대학교 환경공학과) ;
  • 황인성 (부산대학교 토목환경공학과) ;
  • 김영훈 (안동대학교 환경공학과)
  • Received : 2020.10.19
  • Accepted : 2020.12.19
  • Published : 2020.12.31
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Abstract

In this study, the applicability of reduction-oxidation-linked treatment was evaluated for nitrobenzene and a by-product by analyzing the reaction kinetics. Nitrobenzene showed very low reactivity to persulfate that was activated using various methods. Nitrobenzene effectively reacted through the reduction process using Zero-Valent Iron (ZVI). However, aniline, a toxic substance, was produced as a by-product. Reduction-oxidation-linked treatment is a method that can allow the oxidative degradation of aniline after reducing nitrobenzene to aniline. The experimental results show improved reactivity and complete decomposition of the by-product. Improved reactivity and decomposition of the by-product were observed even under conditions in which the reduction-oxidation reaction was induced simultaneously. No activator was injected for persulfate activation in the process of reducing oxidant linkage, and the activation reaction was induced by ferrous iron eluted from the ZVI. This indicates that this method can be implemented relatively simply.

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References

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