膜科学与技术

腐殖酸-牛血清蛋白混合污染物的超滤膜污染行为

作者：冯敏，王磊，杨子晗，苗瑞，吕永涛

单位：西安建筑科技大学环境与市政工程学院,陕西省环境工程重点实验室,陕西省膜分离重点实验室,西安 710055

关键词：超滤膜；混合污染物；膜污染机理；微观作用力

出版年,卷(期):页码： 2020,40(3):22-27

摘要：

本研究选用PVDF超滤膜，分别过滤牛血清蛋白（BSA）、腐殖酸（HA）单种污染物溶液及HA-BSA二元混合污染物溶液，结合相应污染物在膜面吸附行为及膜污染微观作用力，解析HA-BSA混合污染物的超滤膜污染行为。结果发现，相比于BSA，HA-BSA混合物引起的膜污染速率及不可逆污染明显减缓；相反，与HA相比，HA-BSA混合物加剧了膜污染速率及不可逆污染。这主要是由膜污染微观作用力差异引起：HA―PVDF < HA-BSA混合污染物―PVDF < BSA―PVDF，且混合污染物间作用力也明显大于HA―HA但小于BSA―BSA间作用力强度，这导致混合污染物在膜面的吸附累积速率及污染层密实度间于HA和BSA污染物之间，最终导致HA-BSA混合污染物引起的膜污染速率及不可逆污染大于HA污染膜，而小于BSA污染膜。

In this study, PVDF ultrafiltration membranes were used to filter the single pollutant solution of bovine serum albumin (BSA), humic acid (HA) and HA-BSA binary mixed pollutant solution, combined with the corresponding pollutant adsorption behavior on the membrane surface and the membrane. Contamination micro-force, analysis of ultrafiltration membrane pollution behavior of HA-BSA mixed pollutants. The results show that compared with BSA, the membrane fouling rate and irreversible pollution caused by the HA-BSA mixture are significantly slowed down; on the contrary, compared with HA, the HA-BSA mixture intensifies the membrane fouling rate and irreversible pollution. This is mainly caused by the difference in micro-effects of membrane pollution: HA-PVDF

第一作者简介：冯敏(1995- )，女，陕西西安人，硕士研究生，主要从事超滤膜制备与污染机制研究，E-mail:757770624@qq.com *通讯作者，E-mail: wl0178@126.com

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