光催化氧化法处理腐殖酸溶液的实验研究  

Experimental studies on treating humid acid solution by photocatalytic oxidation

作　　者：朱爱梅[1] 李培[1] 张秋根[1] 刘庆林[1] 

机构地区：[1]厦门大学化学化工学院,福建厦门361005

出　　处：《化学工程》2009年第5期62-65,共4页Chemical Engineering(China)

基　　金：厦门大学人才引进基金项目(0000X071C1)

摘　　要：以腐殖酸类物质作为废水中有机物的代表,研究了水体中腐殖酸在纳米TiO2颗粒上的吸附行为及以此为催化剂对水中腐殖酸进行的光催化氧化行为。考察了不同催化剂质量浓度、初始pH值、腐殖酸初始质量浓度等因素对腐殖酸去除率的影响。结果表明:腐殖酸在TiO2颗粒上的平衡吸附量对溶液的初始pH值依赖性很小;初始pH值降低、腐殖酸初始质量浓度减小,均能显著提高腐殖酸的去除率。同时将光催化氧化与单纯紫外线照射的去除率作对比,光催化氧化法明显优于单纯紫外线照射。Humid acid （HA） is the representation of organic matter in wastewater. The behaviors of adsorption and photocatalytic oxidation of HA in water on TiO2 particles were studied. The effects of different factors on removal of HA from water were investigated, such as mass concentration of catalyst, initial value of pH, initial mass concentration of HA, etc. The results show that the adsorption amount of HA in balance on TiO2 particles is independent of initial pH value of the solution. The removal efficiency of HA is improved greatly with the decreasing of initial pH value and initial mass concentration of HA. Comparing the removal efficiency of photocatalytic oxidation with that of ultraviolet radiation alone, the photocatalytic oxidation is better than ultraviolet radiation alone.

关 键 词：光催化氧化 腐殖酸 TIO2 吸附 

分 类 号：X703[环境科学与工程—环境工程] O625[理学—有机化学]