摘要
以不同浓度的葡萄糖、蔗糖溶液作为正渗透汲取液,对比了三醋酸纤维素(CTA)膜和聚酰胺(PA)膜在不同膜朝向下的水通量变化情况。结果表明:当膜的活性层朝向汲取液(ALDS)时,相同汲取液浓度的PA膜水通量高于CTA膜,且随着汲取液浓度的增大,两种FO膜的水通量均增大,但水通量的增幅均随浓度的提高而减小,且蔗糖汲取液对应水通量的增幅高于葡萄糖汲取液;当膜的活性层朝向原料液(AL-FS)时,两种FO膜的水通量均远小于AL-DS模式下的水通量,此时相同汲取液浓度的CTA膜水通量反而高于PA膜,对于CTA膜,水通量变化规律与ALDS模式相似,对于PA膜,随着汲取液浓度的增大,水通量几乎不变,增至高浓度时,水通量反而略有下降。
Glucose and sucrose solution with different concentrations were used as draw solution for forward osmosis, and the water flux change rule of the cellulose triacetate （CTA） membrane and polyam- ide （PA） membrane was compared under different membrane orientations. The results showed that when the membrane orientation was active layer-facing-draw solution （ AL-DS）, the water flux of PA membrane was higher than that of CTA membrane under identical draw solution concentration. With the increase of the draw solution concentration, the water flux of the two FO membranes both increased, but the amplifi- cation of water flux decreased, and the water flux amplification of sucrose solution was higher than that of glucose solution. When the membrane orientation was active layer-facing-feed solution （AL-FS）, the wa- ter flux of the two FO membranes was far less than that in the AL-DS mode, the water flux of CTA mem- brane was higher than that of PA membrane under identical draw solution concentration. The water flux change rule of CTA membrane was similar with that in the AL-DS mode, but with the increase of the draw solution concentration, the water flux of PA membrane was approximately unchanged, as the concentra- tion increased, the water flux slightly decreased instead.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第1期80-83,88,共5页
China Water & Wastewater
基金
重庆市重大科技攻关项目(cstc2012gg-sfgc00002)
2013年重庆高校创新团队建设计划项目(KJTD201340)
关键词
正渗透
CTA膜
PA膜
膜朝向
水通量
forward osmosis
cellulose triaeetate membrane
polyamide membrane
merebrahe orientation
water flux
作者简介
刘帅（1990-），男，河南驻马店人，硕士研究生，从事正向渗透净水技术研究。E—mall：15213304834@163．com
通信作者：周宁玉E-mail：zningyu02@163．com.
