Fouling Behavior of Typical Organic Foulants in Polyvinylidene Fluoride Ultrafiltration Membranes: Characterization from micro-forces

Release time:2024-08-09  Hits:

• Affiliation of Author(s):环境与市政工程学院
• Journal:Environmental Science & Technology
• Key Words:中文关键字：超滤，膜污染，胶体探针，力曲线，英文关键字：
• Abstract:To further unravel the organic fouling behavior of polyvinylidene fluoride (PVDF) ultrafiltration (UF) membranes, the adhesion forces of membrane-foulant and foulant-foulant were investigated by atomic force microscopy (AFM) in conjunction with self-made PVDF colloidal probe and foulant-coated colloidal probe, respectively. Fouling experiments with bovine serum albumin, sodium alginate, humic acid and secondary wastewater effluent organic matter (EfOM) were carried out with PVDF UF membrane. Results showed a positive correlation between the membrane–foulant adhesion force and the flux decline rate and extent in the initial filtration stage, while the foulant–foulant interaction force was closely related to the pseudostable flux and the cake layer structure in the later filtration stage. For each type of foulant used, the membrane–foulant adhesion force was much stronger than the foulant–foulant interaction force, and membrane flux decline mainly occurred in the earlier filtration stage, indicating that elimination of the membrane–foulant interaction force is important for the control of membrane fouling. Upon considering the foulant–foulant interaction force and the membrane flux recovery rate of fouled membranes, it was evident that the main contributor to physically irreversible fouling is the foulant–foulant interaction force.
• Note:王磊
• Co-author:鞠凯,黄丹曦,冯玲,刘紫文
• First Author:yangyongzhe,mengxiaorong,lvyongtao,wangxudong,miaorui,wanglei
• Indexed by:Journal paper
• Volume:卷：47
• Issue:期：8
• Page Number:页：3708-3714
• Translation or Not:no
• Date of Publication:2013-03-01