xDLVO理论解析腐殖酸微滤膜污染机理  

Fouling Mechanisms of Humic Acid Membrane Fouling during Microfiltration Using xDLVO Approach

作　　者：刘晓倩[1] 高欣玉[1] 梁爽[1] 张建[1] 

机构地区：[1]山东大学环境科学与工程学院,山东济南250100

出　　处：《中国环境管理干部学院学报》2015年第6期65-68,共4页Journal of Environmental Management College of China

基　　金：教育部博士点新教师基金项目<用扩展DLVO理论解析污水处理中可溶性有机物膜污染机理>(200804221035);国家自然科学基金项目(50908133);留学回国人员科研启动基金项目(教外司留[2010]1561号)

摘　　要：运用extended Derjaguin-Landau-Verwey-Overbeek(xDLVO)理论定量解析不同pH值下腐殖酸微滤膜污染机理。理论计算表明,随着pH升高,膜污染趋势会降低,这主要是通过改变极性相互作用而实现的,并且过滤初期的膜污染比后期更严重。过滤实验验证了xDLVO理论预测膜污染趋势的准确性。不同阶段下界面相互作用能和膜污染趋势的线性拟合表明,在粘附阶段膜污染趋势对界面作用能更敏感。The mechanisms governing humic acid fouling of microfiltration membranes under diff- erent solution pHs were quantitatively analyzed using the extended Derjaguin-Landau-Verwey- Overbeek （xDLVO） approach. According to theoretical calculations, membrane fouling would bec- ome less severe at higher pH, which is mainly attributed to the change of acid-base interracial in- teraction. Besides, membrane fouling would become more serious in the initial stage than that in the final stage. The validity of xDLVO approach for predicting the severity of membrane fouling was proved by the membrane fouling experimental results. Quantitative analysis of the relationship between fouling potential and interaction energy in different stages suggested that membrane fouling is more sensitive to the change of interfacial interaction in the adhesion stage than that in the cohesion stage.

关 键 词：xDLVO理论 腐殖酸 微滤 膜污染 PH值 

分 类 号：X703[环境科学与工程—环境工程]