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Removing polybrominated diphenyl ethers in pure water using Fe/Pd bimetallic nanoparticles

Frontiers of Environmental Science & Engineering 2015年第5期9卷 832-839页

作者： Min ZHANG Jian LU zhenchengxu Yiliang HF Bo ZHANG Song JIN Brian BOMAN School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Indian River Research and Education-Cenierl U-niversi-ty- of-Florida Fort PierceFL34945USA South China Institute of Environment Sciences Ministry of Environmental Protection Guangzhou 510655 China Department of Civil and Architectural Engineering University of Wyoming Laramie WY 82071 USA

Polybrominated diphenyl ethers （PBDEs） have been widely used as fire-retardants. Due to their high production volume, widespread usage, and environmental persistence, PBDEs have become ubiquitous contaminants in various *** zero-valent iron （ZVI） is an effective reductant for many halogenated organic compounds. To enhance the degradation efficiency, ZVI/ Palladium bimetallic nanoparticles （nZVI/Pd） were synthe- sized 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 nZVL Degradation of BDE209 by nZVI/Pd fits pseudo-first-order 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 9.0 was more than 6.8 x higher than that under pH 5.0. The degradation intermediates of BDE209 by nZVI/Pd were identified and the degradation pathways were hypothesized. Results from this study suggest that nZV//Pd may be an effective tool for treating polybromi- nated diphenyl ethers （PBDEs） in water.

关键词： bimetallic nanoparticles nanoscale zerovalent iron polybrominated diphenyl ethers degradation

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