%0 Journal Article
%T Reductive Dechlorination of Trichloroacetic Acid by Bioelectrochemically Catalytic Method<br>生物电催化方法处理三氯乙酸的研究
%A LI Yu-ping
%A CAO Hong-bin
%A ZHANG Yi
%A <br>李玉平
%A 曹宏斌
%A 张懿
%J 环境科学
%D 2005
%I 
%X Direct electrochemical behaviors of hemoglobin (Hb) immobilized on carbon nanotube (CNT) modified carbon paste electrode with adsorption were investigated. Cyclic voltammetry of Hb-CNT-modified electrode showed a pair of well-defined and nearly reversible peaks for HbhemeFe(III) /Fe(II) redox couple in pH = 7 PBS buffers. The electrocatalytic behaviors of Hb-CNT-modified electrode for the reductive dechlorination of trichloroacetic acid (TCA) were studied by cyclic voltammmetry and fixed-potential electrolysis technique, and the reductive mechanism of TCA was discussed by analysis of reduction products. The results showed that Hb-CNT-modified electrode possessed good electro-catalytic activity for reduction of TCA and the dechlorination of TCA was stepwise, following the pathway of trichloroacetic--> dichloroacetic--> monochloroacetic--> acetic. The dechlorination of TCA in waster water was investigated using a two-compartment flow reactor with working electrode compartment packed with Hb-CNT-modified graphite electrode. The conversion of TCA was 40.13% with electrolysis for 180 min at - 0.60V (vs. SCE).
%K bioelectrochemically catalytic method
%K trichloroacetic acid
%K dechlorination
%K hemoglobin
%K carbon nanotubes<br>生物电催化
%K 三氯乙酸
%K 脱氯
%K 血红蛋白
%K 碳纳米管
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=291EECD0A3CD7753&yid=2DD7160C83D0ACED&vid=96C778EE049EE47D&iid=E158A972A605785F&sid=E514EE58E0E50ECF&eid=9FFCC7AF50CAEBF7&journal_id=0250-3301&journal_name=环境科学&referenced_num=5&reference_num=12