纳滤膜的MgSO_4脱盐率测试方法研究  

Research on Test Methods of Nanofiltration Membrane Desalination Rate

作　　者：于慧[1] 宋杰[1] 李强[1] 潘献辉[1] 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《中国给水排水》2014年第19期72-75,共4页China Water & Wastewater

基　　金：海洋公益性行业科研专项经费资助项目(201405009-3)

摘　　要：选取3种类型的纳滤膜元件，根据我国海洋行业标准《纳滤膜及其元件》（HY／T113—2008）中规定的条件进行测试。分别采用电导率法、滴定法、ICP法测定纳滤膜的脱盐率，分析3种不同方法对脱盐率测试结果的影响。结果表明，采用这3种方法测得的MgSO4脱盐率差别不大，滴定法和ICP法测定结果略高于电导率法，普遍高0．4％以上。为了证明电导率法的合理性，配制了一系列浓度的MgSO4溶液，分析MgSO4浓度和电导率的对应关系。结果表明，MgSO4浓度为0～4000mg／L时，其浓度和电导率基本呈线性关系。虽然电导率法测试结果略低，但却是一种比较科学、合理且便捷的方法。Three types of commercial nanofihration membrane elements were tested according to the China＇ s marine industry standards Membrane and Element of Nanofiltration （HY/T 113 -2008）. Conductivity method, titration method and the ICP method were used respectively to test the nanofihration membrane desalination rate. The impacts of the three different methods on the test results of desalination rate were analyzed. The results showed that there was little difference in the desalination rates （MgSO4 ） tested by the three methods, and the results of titration and ICP methods were higher than that of conduc- tivity method, generally above 0.4%. In order to prove the rationality of the conductivity method, a se- ries of concentrations of MgSO4solution were prepared, and the corresponding relation of MgSO4concen- tration with conductivity was analyzed. The basic linear relation of MgSO4concentration with conductivity was found at MgSO4 concentration of 0 to 4 000 mg/L. Although the test results of the conductivity meth- od were slightly lower, it was a scientific, reasonable and convenient method.

关 键 词：纳滤膜 脱盐率 MgSO4 电导率法 滴定法 ICP法 

分 类 号：TQ051.893[化学工程]