摘要
采用自制的荷正电胍盐纳滤膜进行染料脱盐研究.结果表明,该膜对相对分子质量较高的刚果红和活性蓝截留率较高,分别在95%及90%以上,对相对分子质量小的甲基橙在80%以上.膜对无机盐NaCl和Na2SO4的截留率均较低,说明该膜可以实现染料和盐的有效分离.染料浓度和盐浓度对膜的分离性能有重要影响.随着染料浓度的增加,膜通量降低,但刚果红和NaCl的截留率变化不大,甲基橙、活性蓝19及Na2SO4的截留率略有增大.无机盐浓度的增加对膜通量影响不大,但使膜对染料和盐的截留率都降低.对于刚果红-NaCl、甲基橙-NaCl以及活性蓝19-NaCl 3种模拟污染体系来说,经过4次污染-清洗循环后,膜相对通量均比较高,表明膜具有良好的抗污染性能.此外,在针对甲基橙-NaCl体系的24 h长期运行过程中,膜保持了较好的稳定性.
The self-made positively charged guanidine nanofiltration membrane was used for dye desalination. Results showed that the retention rate of congo red and reactive blue 19 with higher molecular weight was higher than 95% and 90%, respectively, followed by methyl orange with lower molecular weight. The retention of NaCl and Na2SO4 by the membrane is low, which indicated that the membrane can effectively separate dye and salt. The concentration of dyes and salts has an important effect on the separation performance of the membrane. With the increase of dye concentration, the membrane flux decreased, while the retention of congo red and NaCl changed little, the retention of methyl orange, reactive blue 19 and Na2SO4 increased slightly. The increase of inorganic salt concentration had little effect on the membrane flux, but led to the decrease of the rejections of dye and salt. For three simulated pollution systems, including congo red-NaCl, methyl orange-NaCl and reactive blue 19-NaCl, after four pollution-cleaning cycles, all of the membrane showed relatively high fluxes, which demonstrated that the membrane had satisfactory antifouling performance. Furthermore, the membrane maintained good stability in the long-term filtration operation of methyl orange-NaCl system for 24 h.
作者
李霞
岳献阳
杨红英
汪青
梅松林
张秋实
吴件潮
吴万桦
LI Xia;YUE Xianyang;YANG Hongying;WANG Qing;MEI Songlin;ZHANG Qiushi;WU Jianchao;WU Wanhua(Textile College,Zhongyuan University of Technology,Zhengzhou 450007,China;Henan Collaborative Innovation Center of Textile and Garment Industry,Zhengzhou 450007,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2020年第5期62-69,共8页
Membrane Science and Technology
基金
中国纺织工业联合会科技指导性计划项目(2018069)
河南省科技攻关项目(182102310660)
河南省高等学校重点科研项目(20B610008)
河南省质量技术监督局科技计划项目(2019NQ05)
关键词
纳滤膜
荷正电
染料脱盐﹔抗污染
nanofiltration membrane
positively charged
dye desalination
antifouling
