Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Chemical Dechlorination Process of PCBs in Industrial Transformer Oil: Approach to Practical Use

변압기 오일 내 PCBs의 화학적 탈염소공정: 실용적인 접근

  • Ryoo, Keon-Sang (Department of Applied Chemistry, Andong National University) ;
  • Byun, Sang-Hyuk (Department of Applied Chemistry, Andong National University) ;
  • Choi, Jong-Ha (Department of Applied Chemistry, Andong National University)
  • 유건상 (국립 안동대학교 응용화학과) ;
  • 변상혁 (국립 안동대학교 응용화학과) ;
  • 최종하 (국립 안동대학교 응용화학과)
  • Published : 2009.09.30
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Abstract

A practical and efficient disposal method for chemical dechlorination of PCBs (polychlorinated biphenyls) in transformer oil was evaluated. The transformer oil containing PCBs was treated by the PEG 600 (polyethylene glycol 600) and potassium hydroxide (KOH) along with different reaction temperatures(25, 50, 100 and $150^{\circ}C$) and times(30, 60, 240 and 480 min). The best disposal efficiency of PCBs in transformer oil was attained under the experimental conditions of PEG 600 (2.5 w/w%)/KOH (2.5 w/w%)/$150^{\circ}C$/4 hrs, showing completely removal of all PCBs containing 3-9 chlorines on two rings of biphenyl. In studying the reaction of PEG/KOH with PCBs, it confirmed that the process led to less chlorinated PCBs through a stepwise process with the successive elimination of chlorines.

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References

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