Effect of Ca2+ on membrane fouling in SiO2-BSA mixture

WANG Pei; WANG Lei; WU Gongzheng; FENG Min; MIAO Rui

doi:10.11918/201811046

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Effect of Ca2+ on membrane fouling in SiO2-BSA mixture

更新时间：2026-10-23

- Effect of Ca2+ on membrane fouling in SiO2-BSA mixture
- Vol. 52, Issue 2, Pages: 147-152(2020)
- 作者机构：
  
  1. 西安建筑科技大学环境与市政工程学院,西安,710055
  2. 陕西省膜分离重点实验室(西安建筑科技大学),西安,710055
  3. 陕西省环境工程重点实验室(西安建筑科技大学),西安,710055
- 作者简介：
- 基金信息：
- DOI：10.11918/201811046
  CLC： X703.1
- Published：2020
- 稿件说明：
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WANG Pei, WANG Lei, WU Gongzheng, et al. Effect of Ca2+ on membrane fouling in SiO2-BSA mixture[J]. 2020, 52(2): 147-152.
DOI：

WANG Pei, WANG Lei, WU Gongzheng, et al. Effect of Ca2+ on membrane fouling in SiO2-BSA mixture[J]. 2020, 52(2): 147-152. DOI： 10.11918/201811046.

摘要

为研究Ca2+对SiO2-BSA混合污染物膜污染行为的影响

针对SiO2与牛血清蛋白(BSA)共存体系

在不同Ca2+浓度下

使用原子力显微镜测定各污染物与聚偏氟乙烯(PVDF)超滤膜及各污染物之间的作用力

结合膜污染实验

探讨Ca2+对SiO2-BSA混合污染物膜污染行为的影响.结果表明:随着Ca2+浓度的增大

SiO2-BSA引起的膜污染逐渐减小

主要是因为Ca2+改变了SiO2-BSA混合体系中各污染物与膜及污染物之间的相互作用力.针对污染物与膜之间的相互作用力

Ca2+的加入触发了PVDF膜与BSA及SiO2之间的水合排斥力

从而削弱BSA在膜表面的吸附累计速率

有效减缓了运行初期的膜污染速率；针对污染物之间的作用力

Ca2+浓度的增加使得SiO2-SiO2及SiO2-BSA之间作用力增大

从而导致污染物团聚形成大尺寸聚集体

在膜面形成松散多孔的污染层

进而伴随着膜污染速率以及污染幅度的减小.

Abstract

To analyze the effect of Ca2+ ions on the membrane fouling behavior in the mixture of SiO2 and bovine serum albumin (BSA)

atomic force microscope (AFM) technique was used to measure the interaction between foulant-membrane and foulant-foulant under different Ca2+ ion contents. Combined with PVDF membrane fouling and cleaning experiments

effects of Ca2+ ions on the membrane fouling behavior in the mixed SiO2-BSA system were investigated. Results showed that with the increase of Ca2+ ion content

the membrane fouling caused by SiO2-BSA gradually decreased

owing to that the Ca2+ ions changed the interaction between the foulant-membrane and the foulant-foulant. The addition of the Ca2+ ions could effectively trigger the hydration repulsion between PVDF membrane and BSA or SiO2

which weakened the adsorption rate of BSA on the surface of PVDF and ultimately reduced the membrane fouling rate at the initial stage of operation. As the Ca2+ ion content increased

the interaction force between SiO2-SiO2 and SiO2-BSA increased

resulting in the formation of large aggregates and a loose porous fouling layer on the surface of the membrane

accompanied by minor membrane fouling.

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