Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Oxidation of Chloroethenes by Heat-Activated Persulfate

과황산의 열적활성화 및 염소계용제의 산화분해

  • Zhang, Hailong (Department of Environmental Engineering, Andong National University) ;
  • Kwon, Hee-Won (Department of Environmental Engineering, Andong National University) ;
  • Choi, Jeong-Hak (Department of Environmental Engineering, Catholic University of Pusan) ;
  • Kim, Young-Hun (Department of Environmental Engineering, Andong National University)
  • Received : 2017.07.05
  • Accepted : 2017.09.29
  • Published : 2017.11.30
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Abstract

Oxidative degradation of chlorinated ethenes was carried out using heat-activated persulfate. The activation rate of persulfate was dependent on the temperature and the activation reaction rate could be explained based on the Arrhenius equation. The activation energy of persulfate was 19.3 kcal/mol under the assumption that the reaction between the sulfate radical and tricholoroethene (TCE) is very fast. Activation could be achieved at a moderate temperature, so that the adverse effects due to high temperature in the soil environment were mitigated. The reaction rate of TCE was directly proportional to the concentration of persulfate, indicating that the remediation rate can be controlled by the concentration of the injected persulfate. The solution was acidized after the oxidation, and this was dependent on the oxidation temperature. The consumption rate of persulfate was high in the presence of the target organic, but the self-decomposition rate became very low as the target was completely removed.

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References

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