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光电芬顿氧化法深度处理垃圾渗滤液研究

Keywords: 光电芬顿,垃圾渗滤液,铁价态变化,阳极氧化,电芬顿

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Abstract:

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,Fe2+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。

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