Removing polybrominated diphenyl ethers in pure wa

Authors: Min Zhang Jian Lu Zhencheng Xu Yiliang He Bo Zhang Song Jin Brian Boman

Publish Date: 2015/03/18

Volume: 9, Issue: 5, Pages: 832-839

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Abstract

Polybrominated diphenyl ethers PBDEs have been widely used as fireretardants Due to their high production volume widespread usage and environmental persistence PBDEs have become ubiquitous contaminants in various environmentsNanoscale zerovalent iron ZVI is an effective reductant for many halogenated organic compounds To enhance the degradation efficiency ZVI/Palladium bimetallic nanoparticles nZVI/Pd were synthesized in this study to degrade decabromodiphenyl ether BDE209 in water Approximately 90 of BDE209 was rapidly removed by nZVI/Pd within 80 min whereas about 25 of BDE209 was removed by nZVI Degradation of BDE209 by nZVI/Pd fits pseudofirstorder kinetics An increase in pH led to sharply decrease the rate of BDE209 degradation The degradation rate constant in the treatment with initial pH at 90 was more than 68 × higher than that under pH 50 The degradation intermediates of BDE209 by nZVI/Pd were identified and the degradation pathways were hypothesized Results from this study suggest that nZVI/Pd may be an effective tool for treating polybrominated diphenyl ethers PBDEs in water

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