多孔钛板负载Pd阴极电催化加氢还原水中五氯酚  

Electrochemical Hydrodehalogenation of Pentachloraphenol in Aqueous Solution by Porous Titanium Loaded Pd Cathode

作　　者：范经华[1] 范彬[1] 张忠国[1] 陈朝阳[1] 鹿道强[1] 吴恒志[2] 曲丹[1] 

机构地区：[1]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085 [2]台州市建设规划局,台州318000

出　　处：《环境科学》2006年第8期1586-1590,共5页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2002AA649120)

摘　　要：研究了以多孔钛板负载钯作为阴极,通过电催化加氢还原水中五氯酚的脱卤效果和主要影响因素.实验表明,五氯酚电催化加氢的主要产物为苯酚和游离态Cl-.其中Cl-生成量可达到理论值,实现完全脱卤,苯酚的转化率达90%以上.随着PCP浓度的降低,电流效率下降,降解单位重量PCP的能耗增加.回路中电流强度对脱卤的电流效率和能耗影响很大,300mA时效果最佳.与电流相比,水溶液中pH和循环流速对脱卤效果的影响有限.结果表明,多孔钛板负载金属钯电催化反应器可有效地对五氯酚加氢脱卤,电流效率高,能耗低,并且操作简单,适用范围广.A study on electrochemical hydrodehalogenation of pentachloraphenol in aqueous .solutions was conducted on porous titanium loaded Pd cathode and the operational parameters were investigated. Chloride ions and phenol is the main products analyzed by GCMS. Up to 100% electrochemical hydrodehalogenation can be achieved with more than 90 % conversion to phenol. The result showed that current in the circle play the most important role of dehalogenation while the best parameter is 300mA in this study. Compared to current, the effect of pH value and flow rate on the current efficiency and energy consumption of dehalogenation is limited. Complete dehalogenation, high current efficiency, low energy consumption and operational convenience confirm the feasibility of this method.

关 键 词：多孔钛 钯催化剂 五氯酚 电催化加氢脱卤 

分 类 号：X703.1[环境科学与工程—环境工程]