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Reductive dechlorination of polychlorinated biphenyls (PCBs) by ultrasound-assisted chemical process (UACP) |
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| Authors: | J. R. Chen Daeik Kim Joon-Seok Park Kyung-Ik Gil Teh Fu Yen |
| Affiliation: | 1. Sonny Astani Department of Civil and Environmental Engineering, Viterbi School of Engineering, University of Southern California, KAP 210, 3620 South Vermont Ave., Los Angeles, CA, 90089, USA 2. Department of Environmental Engineering, Kangwon National University, 346 Joongang-ro, Samcheok-si, Gangwon-do, Korea 3. Department of Civil Engineering, Seoul National University of Science and Technology, 172 Gongneung-dong, Nowon-gu, Seoul, Korea |
| Abstract: | The dechlorination of aqueous polychlorinated biphenyls (PCBs) using the ultrasound-assisted chemical process (UACP), which is a combination of ultrasonic irradiation and radical generations using di-tert-butyl peroxide as a radical initiator and ferrous ion as a catalyst at moderate temperature in alkaline 2-propanol, was demonstrated with a high reduction of PCBs. A commercial PCB-containing compound, Aroclor 1260, was also decomposed with the removal efficiency of 97 % achieved within 3 h of UACP. The gas chromatograph was used as a quantitative method to measure the decomposition rate of PCBs. The competitive elimination among the ortho (2-position), meta (3-position), and para (4-position) chlorine atoms of PCB was also identified. |
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