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学科主题: Environmental Sciences
题名: Rapid transformation of 1,2,3,4-TCDD by Pd/Fe catalysts
作者: Wang, ZY ; Huang, WL ; Peng, PA ; Fennell, DE
通讯作者: whuang@envsci.rutgers.edu
关键词: PCDD ; Reductive dechlorination ; Pd/Fe catalyst ; Reaction kinetics
刊名: CHEMOSPHERE
发表日期: 2010
卷: 78, 期:2, 页:147-151
收录类别: sci
部门归属: [Wang, Zhiyuan; Huang, Weilin; Fennell, Donna E.] Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901 USA; [Wang, Zhiyuan] Chinese Acad Sci, S China Sea Inst Oceanog, CAS Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Wang, Zhiyuan; Peng, Ping'an] Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
项目归属: 海洋地质
摘要: This study investigated reductive dechlorination of 1,2,3,4-tetrachlorodibenzo-p-dioxin (1,2,3,4-TCDD) in the presence of Pd/Fe, Cu/Fe and Ni/Fe bimetallic catalysts or zero-valent iron (ZVI) under aqueous and ambient temperature conditions. It was found that the Pd/Fe catalyst can rapidly transform 1,2,3,4-TCDD to chlorine-free dibenzo-p-dioxin (DD) with >95% of conversion and half lives on the order of 5 h, whereas Cu/Fe, Ni/Fe and ZVI were not reactive over 10 d. The dechlorination of 1,2,3,4-TCDD in the Pd/Fe systems was found to be stepwise, with 1,2,3-tri (TrCDD), 1,2-di (DCDD), and mono-(MCDD) chlorodibenzo-p-dioxins as the three intermediate products at low concentrations and DD as the final and dominant product. The reaction rate of 1,2,3,4-TCDD dechlorination appeared to decrease as the coverage of palladium on iron particle surface increases from 0.0060 mol% to 0.0228 mol%. Compared to our prior study of reductive dechlorination of 1,2,3,4-TCDD with zero valent zinc (ZVZ) as the reductant, the reactions with Pd/Fe bimetallic materials were relatively slower for TCDD, but much faster for TrCDDs and DCDDs, yielding DID as the major product. The study suggested that Pd/Fe bimetallic catalyst-based reactions may be suitable for rapid decontamination of polychlorinated dibenzo-p-dioxin/dibenzofuran (PCDD/F) polluted soils and sediments. (C) 2009 Elsevier Ltd. All rights reserved.
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WOS记录号: WOS:000272888200011
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4352
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; Huang, WL; Peng, PA; Fennell, DE.Rapid transformation of 1,2,3,4-TCDD by Pd/Fe catalysts,CHEMOSPHERE,2010,78(2):147-151
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