SUVA值与超滤膜污染的关系  

Relationship between SUVA value and ultrafiltration pollution

作　　者：陈卫[1] 袁哲[1] 陶辉[1] 李令春 

机构地区：[1]河海大学环境科学与工程学院,江苏南京210098 [2]东营南郊自来水厂,山东东营257091

出　　处：《华中科技大学学报（自然科学版）》2011年第2期129-132,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家水体污染控制与治理重大科技专项基金资助项目(2008ZX07422-005);江苏省建设科技项目(2009061660001)

摘　　要：以比紫外吸光度(SUVA)值作为水样中有机物亲疏水特性的表征,基于滤饼过滤模型分析SUVA值变化对膜通量的影响,探究其与膜污染的关系.对以胡敏酸和富里酸配制不同SUVA值的水样进行试验,结果发现:随着水样中胡敏酸质量浓度的升高,SUVA值增大,水中疏水性有机物比例提高,亲水性有机物质量浓度减少;水样经过超滤后SUVA值降低8.35%～43.4%;超滤对有机物的截留以强疏水性有机物为主,截留率在65.79%以上.滤饼过滤模型能很好地拟合试验结果,模型中反应滤饼阻力的kp值与SUVA值显著相关,SUVA值较高的水样,其膜污染程度较高.Characterizing water samples as hydrophilic or hydrophobic with the SUVA （scale ultraviolet absorbance） value, the influence of different SUVA value to membranes flux and pollution was analyzed. Samples of different SUVA values with humic acid and fulvic acid were prepared for the test. The results showed that： with the water content of humic acid increases, SUVA value increases and so as the hydrophobic organic matter content, while the hydrophilic organic matter content decreases. After ultrafiltration the SUVA value decreases by 8.35%-43.4%. Ultrafiltration mainly removals the very hydrophobic part of organic matter with a removal rate of more than 65.79%. Cake filtration mode could be a good fit of the test results. The kp values in the model which response to the cake re- sistance has a significant correlation with the samples＇ SUVA values, higher SUVA value means more serious uhrafiltration pollution.

关 键 词：超滤膜污染 比紫外吸光度 有机物 分级 模型 

分 类 号：X131.2[环境科学与工程—环境科学]