富里酸光电降解抑制三氯甲烷生成能机理  

Reduction of CHCl_3 formation potential by photoelectrocatalytic oxidation of fulvic acid

作　　者：傅剑锋[1] 

机构地区：[1]东南大学能源与环境学院,南京210096

出　　处：《东南大学学报（自然科学版）》2006年第6期972-975,共4页Journal of Southeast University：Natural Science Edition

基　　金：教育部天南大合作基金资助项目(2002-2005)

摘　　要：验证了Ti/TiO2光电催化对富里酸降解有协同作用.对多孔Ti/TiO2光电降解富里酸前后影响三氯甲烷生成潜能做了机理探讨,考察了耗氯量、三氯甲烷生成能和荧光光谱图的变化过程,试验结果表明,随着富里酸TOC质量浓度的增加,三氯甲烷生成量逐渐增大,经过2 h的光电催化降解,耗氯量和三氯甲烷生成能分别被减少了72%和81%.荧光光谱图的变化也充分说明了经过光电催化氧化,富里酸溶液的荧光光强明显减弱,腐殖化程度降低,因此通过光电催化氧化可有效破坏富里酸的结构使得氯化过程产生的消毒副产物量大大减少.A synergetic effect has been observed with combination of photocatalysis and electrocatalysis. The changes of chloroform formation potential during chlorination caused by Ti/TiO2 photoelectrocatalytic oxidation treatments were also investigated. The global changes observed during the treatment of the fulvic acid （FA） solution were directly connected to the chlorine demand, chloroform formation potential and fluorescence excitation-emission matrices spectra. Experiment results show that the chlorine demand and the trihalomethanes formation potential are reduced by 72% and 81% respectively after 2 h photoelectrooxidation. In addition, the fluorescence intensity of fulvic acid gradually decreases through photoelectrocatalytic oxidation treatment. Consequently, the FA degradation entails a drastic reduction of the chloroform formation potential due to the damage of FA structure.

关 键 词：光电催化氧化 Ti/TiO2 电极 富里酸 三氯甲烷生成能 

分 类 号：X52[环境科学与工程—环境工程]