摘要
采用卷式纳滤膜进行了MgSO4、K2SO4、MgCl2等5种物质的脱盐性能研究,考察了进料操作压力和浓度对表观截留率和膜通量的影响,在此基础上研究了操作压力对海水脱盐性能的影响.实验表明,纳滤膜性能稳定,能除去海水中90%以上的SO42-以及50%以上的Mg2+和Ca2+,大幅度降低了海水的硬度,可解决传统上海水淡化过程中易结垢离子对膜的污染问题;纳滤膜软化海水可以降低海水淡化后期处理的成本和能耗;采用纳滤膜软化海水在技术上是可行的.
Desalination experiments of five inorganic salt solutions(MgSO4,K2 SO4,MgCl2,etc)have been carried out by spiral-wound nanofiltration membrane.The effects of the species and the concentration of salt as well as the operation pressure on the the apparent rejection and the flux of penetrating fluid.Studies on desalination performance of artificial seawater are also introduced.Results from the studies of desalination show that nanofiltration membrane is stable during the experiment.For SO42 in seawater nanofiltration membrane could achieved salt rejection up to 90%,and Mg2+,Ca2+up to 50%,It could solve the problems of nanofiltration membranes pollution that existed on the traditional desalination process.Compared with distillation,nanofiltration reduce the cost of seawater desalination and energy consumption.Therefore,nanofiltration technology could be used to pretreat seawater.
作者
张莉娜
黄婕
熊丹柳
杨俊和
ZHANG Lina;HUANG Jie;XIONG Danliu;YANG Junhe(College of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;School of Materials Science and Technology,University of Shanghai for Science and Technology,200093,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2012年第1期97-101,共5页
Membrane Science and Technology
基金
国家自然科学基金(50773040)
国家973项目(2010CB234609)
关键词
海水
软化
纳滤
膜分离
seawater
softening
nanofiltration
membrane separation
