Radiolytic decomposition of 4-bromodiphenyl ether

LOW ENERGY ACCELERATORS AND RADIATION APPLICATIONS

Radiolytic decomposition of 4-bromodiphenyl ether

TANG Liang，

XU Gang，

WU Wenjing，

SHI Wenyan，

LIU Ning，

BAI Yulei，

WU Minghong

Nuclear Science and Techniques

Vol.21, No.2

pp.72-75

Published in print 20 Apr 2010

DOI：10.13538/j.1001-8042/nst.21.72-75

57800

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 e_sol^– in the reduction system was measured at 2.7×10¹⁰ 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 e_sol^– in radiolytic process.

4-Bromodiphenyl etherE-beam irradiation decompositionPulsed radiolysisReaction rate constant

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