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学科主题: Engineering, Environmental; Engineering, Civil; Environmental Sciences
题名: Dechlorination of gamma-hexachlorocyclohexane by zero-valent metallic iron
作者: Wang, ZY ; Peng, PA ; Huang, WL
通讯作者: pinganp@gig.ac.cn
关键词: Zero-valent iron ; Dechlorination ; gamma-HCH ; Kinetics
刊名: JOURNAL OF HAZARDOUS MATERIALS
发表日期: 2009
卷: 166, 期:40577, 页:992-997
收录类别: sci
部门归属: [Wang, Zhiyuan; Peng, Ping'an] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China; [Wang, Zhiyuan] Chinese Acad Sci, S China Sea Inst Oceanol, CAS Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Huang, Weilin] Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901 USA
项目归属: 海洋地质
摘要: This study investigated the rates and pathways of gamma-hexachlorocyclohexane (gamma-HCH) dechlorination by granular zero-valent iron under different pH, iron dosage and temperature conditions. It was found that gamma-HCH was rapidly reduced to benzene and chlorobenzene (CB) with benzene as the major product and that the dechlorination likely follows three steps of dichloroelimination to benzene, or two steps of dichloroelinninations and one step of dehydrohalogenation to CB. The calculated pseudo-first-order rate of gamma-HCH degradation was 0.0125 min(-1) at pH 6.73,25 degrees C and 10 g L-1 iron dosage, corresponding to 55.5 min of half-life. It was also found that the rate of gamma-HCH dechlorination increases as a function of reaction temperature and zero-valent iron dosage and decreases as a function of solution pH. The calculated activation energy is 33.5 kJ mol(-1) at pH 6.73, which is much lower than that of dehydrohalogenation facilitated by hydroxyl under basic conditions. The study suggested that zero-valent iron could be used to effectively and efficiently transform gamma-HCH. (C) 2008 Elsevier B.V. All rights reserved.
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WOS记录号: WOS:000266947000060
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4618
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Wang, ZY; Peng, PA; Huang, WL.Dechlorination of gamma-hexachlorocyclohexane by zero-valent metallic iron,JOURNAL OF HAZARDOUS MATERIALS,2009,166(40577):992-997
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