化工进展2018，Vol.37Issue(1)：359-367,9.DOI:10.16085/j.issn.1000-6613.2017-1246
正渗透膜污染影响因素的研究与分析
Research and analysis on influencing factors of forward osmosis membrane fouling
摘要
Abstract
In this paper,sodium alginate(ALG)was used as the typical organic pollutant,and the water flux decrease rate and fouling resistance were used as the evaluation index of membrane fouling. The influence of the membrane orientation(FO mode and PRO mode),the feed solution(FS) and the driving solution(DS) concentration,Ca2+concentration and pH in FS on the TFC FO membrane fouling were studied. And a suitable membrane cleaning protocol was proposed. The results showed that the membrane fouling resistance was 3.38×1011m–1in the PRO mode,and only 3.88×1010m–1in the FO mode,which indicated that the degree of fouling in PRO mode was more serious. When the concentration of FS or DS increased,led to the increase of fouling resistance,it made the fouling more serious. When there was no Ca2+and the concentration of Ca2+was 1mmol/L and 2mmol/L in FS,the flux reduction rate was 15.40%,18.49% and 24.93% respectively. When the Ca2+concentration increased from 1mmol/L to 2mmol/L compared with the initial flux,the membrane resistance increased by 1.6 times. When the pH of FS was 4.2,7.0 and 10.7,the water flux reduction rate increased by 14.56%,14.82% and 18.78%,respectively. In order to recover the membrane performance,the membrane was cleaned with deionized water,HCl solution with pH 3.0,NaOH solution at pH 11.8 and SDS(pH =11.0)solution,respectively. The results showed that SDS solution was the more effective cleaning protocol and the flux recovery rate was 90.70%.关键词
正渗透/膜污染/FO模式/PRO模式/化学清洗Key words
forward osmosis/membrane fouling/FO mode/PRO mode/chemical cleaning分类
化学化工引用本文复制引用
肖芹芹,徐世昌,王越,王红柳..正渗透膜污染影响因素的研究与分析[J].化工进展,2018,37(1):359-367,9.基金项目
天津市海洋经济创新发展区域示范项目(CXSF2014-10). （CXSF2014-10）
