Removal of decabromodiphenyl ether (BDE-209) by sepiolite-supported nanoscale zerovalent iron

被引：0
作者：
Rongbing Fu
Na Mu
Xiaopin Guo
Zhen Xu
Dongsu Bi
机构：
[1] Shanghai Institute of Technology,School of Chemical and Environmental Engineering
[2] Shanghai Academy of Environmental Sciences,undefined
来源：
Frontiers of Environmental Science & Engineering | 2015年 / 9卷
关键词：
sepiolite-supported nanoscale zerovalent iron; decabromodiphenyl ether; debromination; adsorption; mechanism;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Nanoscale zerovalent iron (nZVI) synthesized using sepiolite as a supporter was used to investigate the removal kinetics and mechanisms of decabromodiphenyl ether (BDE-209). BDE-209 was rapidly removed by the prepared sepiolite-supported nZVI with a reaction rate that was 5 times greater than that of the conventionally prepared nZVI because of its high surface area and reactivity. The degradation of BDE-209 occurred in a stepwise debromination manner, which followed pseudo-first-order kinetics. The removal efficiency of BDE-209 increased with increasing dosage of sepiolite-supported nZVI particles and decreasing pH, and the efficiency decreased with increasing initial BDE-209 concentrations. The presence of tetrahydrofuran (THF) as a cosolvent at certain volume fractions in water influenced the degradation rate of sepiolite-supported nZVI. Debromination pathways of BDE-209 with sepiolite-supported nZVI were proposed based on the identified reaction intermediates, which ranged from nona- to mono-brominated diphenylethers (BDEs) under acidic conditions and nonato penta-BDEs under alkaline conditions. Adsorption on sepiolite-supported nZVI particles also played a role in the removal of BDE-209. Our findings indicate that the particles have potential applications in removing environmental pollutants, such as halogenated organic contaminants.
引用
收藏
页码：867 / 878
页数：11
相关论文
共 176 条
  • [1] Peng X Z(2009)Concentrations, transport, fate, and releases of polybrominated diphenyl ethers in sewage treatment plants in the Pearl River Delta, South China Environment International 35 303-309
  • [2] Tang C M(2009)Occurrence of brominated flame retardants other than polybrominated diphenyl ethers in environmental and biota samples from southern China Chemosphere 74 910-916
  • [3] Yu Y Y(2008)Elevated levels of polybrominated diphenyl ethers (PBDEs) in fish from Lake Mjøsa, Norway Science of the Total Environment 390 132-141
  • [4] Tan J H(2005)Polybrominated diphenyl ethers and polychlorinated biphenyls in human adipose tissue from New York Environmental Science & Technology 39 5177-5182
  • [5] Huang Q X(2004)Retrospective time-trend study of polybrominated diphenyl ether and polybrominated and polychlorinated biphenyl levels in human serum from the United States Environmental Health Perspectives 112 654-658
  • [6] Wu J P(2009)Polybrominated diphenyl ethers (PBDEs) in freerange domestic fowl from an e-waste recycling site in South China: levels, profile and human dietary exposure Environment International 35 253-258
  • [7] Chen S J(2008)Distribution and partition of polybrominated diphenyl ethers (PBDEs) in water of the Zhujiang River Estuary Chinese Science Bulletin 53 493-500
  • [8] Mai B X(2007)Determination of polybrominated diphenyl ethers in freshwater fishes from a river polluted by ewastes Talanta 72 1644-1649
  • [9] Shi T(2001)Polybrominated diphenyl ethers: occurrence, dietary exposure, and toxicology Environmental Health Perspectives 109 49-68
  • [10] Chen S J(2003)Brominated dioxin-like compounds: in vitro assessment in comparison to classical dioxinlike compounds and other polyaromatic compounds Environment International 29 861-877
12345678910