天津工业大学学报2018，Vol.37Issue(2)：26-30,5.DOI:10.3969/j.issn.1671-024x.2018.02.005
反洗水组分对PVDF超滤膜污染的影响
Effect of backwash water composition on ultrafiltration membrane fouling
摘要
Abstract
In order to investigate the contribution of different components in the backwash water to the removal of membrane fouling,the humic acid solution was used as filter media and periodic filter backwashing experiment was carried out with single membrane in this experiment.The experimental results show that small molecular organic com-pounds in backwash water have little effect on membrane flux recovery and reverse washing efficiency compared with pure water.However,metal cations such as Ca2+and Na+can produce charge shielding and bridge effect on the inner and outer walls of the hollow fiber membrane,which strengthen the accumulation of pollutants on the surface of the membrane and lead to a more serious irreversible fouling.AFM picture shows that the removal of the membrane surface contaminants becomes more difficult with the addition of metal cations such as Ca2+and Na+in the backwash water.This experiment provides a new way of method for controlling membrane pollution by regulating the water components of the backwash water.关键词
反洗水组分/PVDF/反洗效率/超滤膜/膜污染Key words
backwash water composition/PVDF/backwash efficiency/ultrafiltration membrane/membrane fouling分类
轻工纺织引用本文复制引用
赵学辉,胡岩,张宏伟..反洗水组分对PVDF超滤膜污染的影响[J].天津工业大学学报,2018,37(2):26-30,5.基金项目
国家自然科学基金面上项目(51578374) （51578374）
天津市高等学校科技发展基金计划项目(20140517) （20140517）
