化工进展2017，Vol.36Issue(11)：4293-4300,8.DOI:10.16085/j.issn.1000-6613.2017-0374
光催化对多通道陶瓷膜错流超滤去除腐植酸膜污染的影响
Effects of photocatalysis on membrane fouling in cross-flow system with multichannel ceramic ultrafiltration membrane for removal of humic acid
摘要
Abstract
In order to investigate the effects of photocatalysis on membrane fouling behaviors using hybrid process of photocatalysis and multichannel ceramic ultrafiltration membrane for removal of humic acid from water,the membrane flux variations,pollutant removal rates,membrane fouling models and membrane fouling resistances under different photocatalyst concentrations were discussed. The backwash effects on membrane flux variations were also observed. The results showed that the photocatalysis could effectively improve the steady permeate fluxes and removal rates of pollutants. As the catalyst concentration was 0.4g/L,the relative membrane flux reached the lowest value of 58.6％. As the catalyst concentration was 0.6g/L,the pollutants removal rates gained the highest level,in which the DOC,UV254 and UV436 reached 76.5％,87.3％ and 96.8％, respectively. In the hybrid process of photocatalysis and ceramic membrane,the membrane fouling firstly underwent a short time of membrane pore blocking and transition stage,and then were mainly controlled by the deposition of pollutants on the membrane surface. The photocatalysis can significantly reduce the total and reversible membrane fouling resistances. Under the photocatalysis, although on-line backwashing had less effect on membrane flux recovery,its membrane fluxes also decreased limitedly prior to every backwashing.Therefore,in the periodic on-line backwashing process,the overall running range of the membrane flux under the photocatalysis was much higher than that of the situation without using photocatalysis.关键词
多通道陶瓷膜/催化/膜污染/腐植酸/超滤/氧化Key words
multichannel ceramic membranes/catalysis/membrane fouling/humic acid/ultrafiltration/oxidation分类
资源环境引用本文复制引用
杨涛,乔波,李国朝,刘芬,柏凌..光催化对多通道陶瓷膜错流超滤去除腐植酸膜污染的影响[J].化工进展,2017,36(11):4293-4300,8.基金项目
国家自然科学基金项目(21566013). （21566013）
