%0 Journal Article
%T Dechlorination mechanism and kinetic of 2,4-DCP by nanoscale Pd/Fe system<br>纳米Pd/Fe双金属对2,4-二氯酚的脱氯机理及动力学
%A XU Xinhu
%A JIN Jian
%A WEI Jianjun
%A WANG Dahui
%A <br>徐新华
%A 金剑
%A 卫建军
%A 汪大
%J 环境科学学报
%D 2004
%I 
%X Nanoscale Pd/Fe bimetallic catalysts were synthesized via chemical deposition and used to decompose 2,4-DCP. Nanoscale particles were characterized by high surface area to volume ratios and high reactivity. Batch experiments demonstrated that the nanoscale Pd/Fe particles could effectively dechlorinate 2,4-DCP at relatively low metal to solution ratio (6g·L-1), Dechlorination efficiency reached 90% at Pd weight ratio (Pd to Fe) 0.11%. Dechlorination was affected by reaction temperature, pH, Pd ratio and the addition of nanoscale Pd/Fe.2-CP and 4 CP represent stable partially dechlorination intermediates, and then phenol. Some 2,4-DCP was dechlorinated to phenol indirectly. The dechlorination was believed to take place on the surface of the nanoscale Pd/Fe bimetallic particles via a pseudo-first order reaction,the activation energy was found to be 139.7kJ·mol-1.
%K nanoscale Pd/Fe bimetal
%K 2
%K 4-DCP
%K dechloroniation
%K mechanism
%K kinetic<br>纳米Pd/Fe双金属
%K 2
%K 4-二氯酚
%K 脱氯
%K 机理
%K 动力学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=22A3A27136F74FFC&yid=D0E58B75BFD8E51C&vid=B91E8C6D6FE990DB&iid=E158A972A605785F&sid=B4F9D541F855CF96&eid=41A78CBB5BAB6860&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=11&reference_num=13