标题：Application of Low-Cost Sponge Iron for Complete Debromination of Polybrominated Diphenyl Ethers
作者：Shou-Qing Ni;Zhen Zheng;Wei Jiang;Jinhua Zhan
作者机构：[Ni, S.-Q] School of Environmental Science and Engineering, Shandong University, Jinan 250100, China, Key Laboratory for Colloid and Interface Chemist 更多
通讯作者地址：[Jiang, W]Shandong Univ, Sch Chem & Chem Engn, Educ Minist, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China.
来源：Science of advanced materials
关键词：Debromination;Kinetics;Pathway;Polybrominated Diphenyl Ethers;Sponge Iron
摘要：Although penta- and octa-BDE congeners were included in the Stockholm Convention recently, decabro-modiphenyl ether (BDE 209) is currently exempted from regulation and continues to be used heavily. Thus a large amount of environmental samples has been seriously contaminated, which calls for proper economic remediation technologies. In this study, debromination of BDE 209 with sponge iron, also called direct-reduced iron, was studied to investigate the degradation process and reaction kinetics. The reaction was described well by the pseudo-first-order kinetic model. With increasing reaction time, sponge iron particles could debrominate BDE 209 into lower environmental dominant brominated compounds, such as BDE-153, BDE-100, BDE-99, BDE-47 and diphenyl ether, the complete debromination product. This is the first report of complete debromination of BDE 209 using sponge iron. Influenced by iron dosage, PBDEs concentration, solvent condition and other parameters, the reaction rates were comparable with nanoscale zerovalent iron and other Fe-based materials. From an engineering point of view, sponge iron would spawn low-cost remediation technologies for complete detoxification of PBDEs and benefit practical halogenated organic compounds remediation.