Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2010, Vol. 21 ›› Issue (2): 72-75 doi: 10.13538/j.1001-8042/nst.21.72-75

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Radiolytic decomposition of 4-bromodiphenyl ether

TANG Liang XU Gang WU Wenjing SHI Wenyan LIU Ning BAI Yulei WU Minghong*   

  1. Shanghai Applied Radiation Institute, Shanghai University, Shanghai 200444, China
TANG Liang, XU Gang, WU Wenjing, SHI Wenyan, LIU Ning, BAI Yulei, WU Minghong. Radiolytic decomposition of 4-bromodiphenyl ether.Nuclear Science and Techniques, 2010, 21(2): 72-75     doi: 10.13538/j.1001-8042/nst.21.72-75

Abstract:

Polybrominated diphenyl ethers (PBDEs) spread widely in the environment are mainly removed by photochemical and anaerobic microbial degradation. In this paper, the decomposition of 4-bromodiphenyl ether (BDE -3), the PBDEs homologues, is investigated by electron beam irradiation of its ethanol/water solution (reduction system) and acetonitrile/water solution (oxidation system). The radiolytic products were determined by GC coupled with electron capture detector, and the reaction rate constant of esol– in the reduction system was measured at 2.7×10 L·mol–1·s–1 by pulsed radiolysis. The results show that the BDE-3 concentration affects strongly the decomposition ratio in the alkali solution, and the reduction system has a higher BDE-3 decomposition rate than the oxidation system. This indicates that the BDE-3 was reduced by effectively capturing esol– in radiolytic process.

Key words: 4-Bromodiphenyl ether, E-beam irradiation decomposition, Pulsed radiolysis, Reaction rate constant