Identifying polyvinylidene fluoride UF fouling behavior of different effluent organic matter fractions using colloidal probes

Release time:2024-08-09  Hits:

• Affiliation of Author(s):环境与市政工程学院
• Journal:Water Research
• Key Words:中文关键字：胶体探针；原子力显微镜；膜污染；二级出水有机物；相互作用力，英文关键字：Colloidal probes；Atomic force microscopy；Membrane
• Abstract:The interaction forces between effluent organic matter (EfOM) fractions and membrane were measured by atomic force microscopy in conjunction with self-made membrane material colloidal probes. The inter-EfOM-fraction and intra-EfOM-fraction interactions were investigated using corresponding EfOM-fraction-coated colloidal probe. We combined this analysis with corresponding fouling experiments to identify the EfOM fractions responsible for polyvinylidene fluoride (PVDF) ultrafiltration membrane fouling. Results show that hydrophilic and hydrophobic fractions were the dominant fractions responsible for membrane fouling and flux decline in the initial and later filtration stages, respectively, which was mainly attributed to the stronger PVDF-hydrophilic fraction and intrahydrophobic-fraction interaction forces. This phenomenon, in conjunction with the fact that each interaction force of PVDFeEfOM fraction was stronger than corresponding intra- EfOM-fraction force, suggests that the elimination of the PVDF-hydrophilic fraction interaction force is the best strategy for controlling EfOM fouling. Moreover, the inter-EfOMfraction interaction force was mainly controlled by the corresponding intra-EfOMfraction interaction forces. And, while the membraneeEfOM fraction and intra-EfOMfraction interactions for each type of EfOM fraction are equivalent, the EfOM fractions with the molecular weight smaller than the molecular weight cutoff of the membranes used were mainly responsible for membrane fouling rather than the relatively highmolecular-weight fractions.
• Note:王磊
• Co-author:冯玲,刘紫文,黄丹曦
• First Author:yangyongzhe,wangxudong,lvyongtao,wanglei,miaorui
• Indexed by:Journal paper
• Volume:卷：55
• Issue:期：
• Page Number:页：313-322
• Translation or Not:no
• Date of Publication:2014-05-01