Electrolytic debromination of PBDEs in DE-83^TM technical decabromodiphenyl ether

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• 作者：Alex ; re Konstantinov ; Dorin Bejan ; Nigel J. Bunce ; Brock Chittim ; Robert McCrindle ; Dave Potter ; Colleen Tashiro
• 关键词：Polybrominated diphenyl ethers ; Electrochemical debromination
• 刊名：Chemosphere
• 出版年：2008
• 期刊代码：15_00456535
• 类别：env
• 出版时间：July 2008
• 卷：72
• 期：8
• 页码：1159-1162
• 文件大小：211 K

摘要

Electrochemical debromination of the commercial decabromodiphenyl ether flame retardant DE-83^TM in partly aqueous tetrahydrofuran (THF) solution gave lower brominated congeners by sequential loss of bromine atoms. Hydrodebromination was most facile for the most heavily brominated congeners. It involves initial electron transfer and proton transfer from water, rather than hydrogen atom abstraction from THF, as shown by experiments with deuterated water. The product distribution from electrolysis involves preferential loss of bromine meta- and para- to the ether linkage, comparable with the products of metabolism of BDE-209 in various organisms. Significantly, the environmentally relevant congeners BDE-47, BDE-99, and BDE-154 were not major products of debromination of BDE-209 by the electron transfer mechanism.