光电芬顿氧化法深度处理垃圾渗滤液研究  

Study on the treatment of landfill leachate by photo-electro-Fenton oxidation

作　　者：王春霞[1,2] 肖书虎[1] 赵旭[1] 刘会娟[1] 曲久辉[1] 常雁红[2] 

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]北京科技大学土木与环境工程学院,北京100083

出　　处：《环境工程学报》2009年第1期11-16,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50778172);中国科学院知识创新工程青年人才领域前沿项目(RCEES-QN-2007Z007)

摘　　要：采用光电芬顿氧化法对北京市某垃圾填埋场已经生化处理后的垃圾渗滤液进行深度处理，分别考察了电流强度和铁的不同价态等因素对渗滤液总有机碳（TOC）、化学需氧量（COD）以及色度去除效果的影响，并对阳极氧化、电芬顿和光电芬顿不同反应过程进行了对比。通过分析渗滤液UV—Vis光谱（200～500nm）变化和渗滤液中有机污染物的分子量变化，发现光电芬顿反应可以明显改善渗滤液生化性。深入研究了反应过程中铁价态的变化规律。试验结果发现，以高比表面积的活性炭纤维（ACF）为阴极的光电芬顿反应可以有效降解垃圾渗滤液，在pH为3，Fe^2＋浓度为1mmol／L，电流为0．5A，O2通入量为250mL／min条件下降解360min，垃圾渗滤液TOC和COD去除率分别达到78．9％和62．8％，色度完全去除。Photo-electro-Fenton oxidation method was used to treat landfill leachate, which was pre-treated by biochemical process and sampled from a landfill in Beijing City. The effects of current strength and iron valence on total organic carbon （TOC） , chemical oxygen dose （ COD）, and color removal were investigated. Meanwhile, several different reactions of anodic oxidation, electro-Fenton, and photo-electro-Fenton were compared. The UV-Vis spectrometry of landfill leachate as well as the molecular weight distribution of organic pollutants （measured via Gel chromatography） was analyzed. The biodegradability was improved greatly. Variation of iron concentration in the reaction process was also tested. The photo-electro-Fenton reaction using ACF cathode could degrade landfill leachate effectively. After 360 min electrolysis and under the operation conditions of 0.5 A current, 1 mmol/L Fe^2＋ , 250 mL/min 02 at pH 3, 78.9% of TOC and 62.8% of COD were removed respectively as well as complete decolorization.

关 键 词：光电芬顿 垃圾渗滤液 铁价态变化 阳极氧化 电芬顿 

分 类 号：X703.1[环境科学与工程—环境工程]