期刊首页 优先出版 当期阅读 过刊浏览 作者中心 关于期刊 English

2013年 第7卷 第6期

摘要

关键词

相关研究

回顶部

《环境科学与工程前沿（英文）》 >> 2013年 第7卷 第6期 doi: 10.1007/s11783-013-0543-y

Dechlorination of 2,2′,4,4′,5,5′-hexachlorobiphenyl by thermal reaction with activated carbon-supported copper or zinc

1. School of Chemistry and Environment, Beihang University, Beijing 100191, China; 2. College of Chemical Science and Engineering, China University of Petroleum, Beijing 102249, China; 3. School of Environment, Tsinghua University, Beijing 100084, China

发布日期： 2013-12-01
HTML19 PDF 2 收藏 0

下一篇 上一篇

摘要

Activated carbon (AC)-supported copper or zinc made from ion exchange resin (IRCu-C and IRZn-C) have an increased metal load of 557.3 mg?g and 502.8 mg?g compared to those prepared by the traditional method involving impregnation with AC and copper (II) citrate or zinc citrate solution (LaCu-C and LaZn-C) of 12.9 mg?g and 46.0 mg?g respectively. When applied to decompose 2,2′,4,4′,5,5′-hexachlorobiphenyl at 250 °C, IRCu-C achieved higher activity of 99.0% decomposition efficiency than LaCu-C of 84.7%, IRZn-C of 90.5% and LaZn-C of 62.7%. When the reaction temperature rose to 350 °C, all the four kinds of reactants can decompose PCB-153 with efficiency above 90%. Further, X-ray photoelectron spectroscopy characterization of IRCu-C before and after the reaction indicated transformation of 19.1% of Cu atoms into Cu , illustrating that Cu is the active ingredient or electron donor promoting the decomposition of PCB-153. The mechanism underlying this process differs from a traditional H donor. However, there is no significant change on the surface of IRZn-C before and after the reaction, suggesting that Zn acts as catalyst during the process of PCB-153 decomposition.

相关研究