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Chemical Treatment of the PCBs-laden Transformer Insulation Oil
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 Title & Authors
Chemical Treatment of the PCBs-laden Transformer Insulation Oil
Ryoo, Keon-Sang; Choi, Jong-Ha; Choi, Jin-Whan;
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Practical disposal of transformer insulation oil laden with PCBs (polychlorinated biphenyls) by a chemical treatment has been studied in field work. The transformer insulation oil containing PCBs was treated by the required amounts of PEG (polyethylene glycol) and KOH, along with different reaction conditions such as temperatures and times. The reaction of PEG with PCBs under basic condition produces arylpolyglycols, the products of nucleophilic aromatic substitution. Removal efficiencies of PCBs in insulation oil before and after chemical treatment were examined. The removal efficiency of PCBs was very low at lower temperatures of 25 and . Under the reaction condition of PEG 600/KOH//2hr, removal efficiency of PCBs was approximately 70%, showing completely removal of PCBs containing 7~9 chlorines on biphenyl frame which appear later than PCB IUPAC Number 183 (2,2',3,4,4',5',6-heptaCB) in retention time of GC/ECD. However, when increasing the reaction temperature and time to and 4 hours, removal efficiency of PCBs reached 99.99% without any formation of PCDDS/PCDFs during the process. Such reaction conditions were verified by several official analytical institutions. In studying the reaction of PEG with PCBs, it confirmed that the process of chemical treatment led to less chlorinated PCBs through a stepwise process with the successive elimination of chlorines.
PCBs;Transformer insulation oil;PEG;Chemical treatment;Chlorine;
 Cited by
이상훈, 서광국, 2005, 잔류성 유기오염물질 분해 처리 기술 현황, Clean Technology, 11(1), 29-39.

Gschwend, P. M., Wu, S., 1985, On the constancy of sediment-water partition coefficients of hydrophobic organic pollutants, Environ. Sci. Technol., 19, 90-96. crossref(new window)

Liu, X., Yu, G., 2006, Combined effect of microwave and activated carbon on the remediation of polychlorinated biphenyl-contaminated soil, Chemosphere, 63, 228-235. crossref(new window)

Manzano, M. A., Peralers, J. A., Sales, D., Quiroga, J. M., 2004, Using solar and ultraviolet light to degrade PCBs in sand and transformer oils, Chemosphere, 57, 645-654. crossref(new window)

Ning, H., Myers, T. E., 2002, PCB removal from contaminated dredged material, Chemosphere, 46, 477-484. crossref(new window)

PCBs 환경연구회, 2007, PCBs 이해와 대응, 학술진흥재단 PCBs 환경연구회, 5-12.

Ryoo, K. S., Kapila, S., Puri, R. K., Yanders, A. F., Elseewi, A. A., 1992, Evaluation of carbon for removal of PCBs from transformer mineral oils, Chemosphere, 25, 1569-1575. crossref(new window)

Schulz, D. E., Petrick, G., Uuinker, J. C., 1989, Complete characterization of polychlorinated biphenyls congeners in commercial Aroclor and Clophen mixtures by multidimensional gas chromatographyelectron capture detection, Environ. Sci. Technol., 23, 852-859. crossref(new window)

Sedlak, D. L., Andren, A. W., 1991, Aqueous-phase oxidation of polychlorinated biphenyls by hydroxyl radicals, Environ. Sci. Technol., 25, 1419-1427. crossref(new window)

Sun, Y., Takaoka, M., Takeda, N., Matsumoto, T., Oshita, K., 2006, Kinetics on the decomposition of polychlorinated biphenyls with activated carbonsupported iron, 2006, 65, 183-189. crossref(new window)

World Health Organization (WHO), 2000, Air quality guideline, Copenhagen, 2, 1-21.

Wu, W., Xu, J., Zhao, H., Zhang, Q., Liao, S., 2005, A practical approach to the degradation of polychlorinated biphenyls in transformer oil, Chemosphere, 60, 944-950. crossref(new window)