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
分类号: TQ028.8
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

基金项目:
陕西省科技创新引导专项(2018HJCG-18) ;陕西省重点科技创新团队计划(2017KCT-19-01)

作者简介:
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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