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首页> 外文期刊>International journal of nuclear desalination >Thin film composite type positively charged nanofiltration membrane for separation of aqueous streams and nuclear effluents
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Thin film composite type positively charged nanofiltration membrane for separation of aqueous streams and nuclear effluents

机译：薄膜复合型带正电的纳滤膜，用于分离水流和核废料

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摘要

Thin film composite type positively charged nanofiltration membrane developed by in situ polymerisation of functionalised polyethyleneimine and acid chloride has been used in various aqueous stream separations. The membrane contained fixed quaternary ammonium moieties which contributed to its positive charge. The membrane was tested for its performance in single solute feed systems containing salts of various combinations of univalcnt and bivalent ions (NaCl, Na_2SO_4, CaCl_2 and MgSO4) in test cells as well as spiral module where it gave differential separation profile for these solutes with high rejection for CaCl_2 and low rejection for Na_2SO_4. The 2512 spiral module of the membrane was further used for separation of a simulated effluent solution containing uranyl nitrate, which is a common effluent generated in the nuclear industry. The membrane gave a high separation for uranyl nitrate and low separation for ammonium nitrate indicating that both the solutes can be fractionated by the membrane when they are present together in the nuclear effluent.
机译：通过官能化的聚乙烯亚胺和酰氯的原位聚合开发的薄膜复合型带正电的纳滤膜已用于各种水流分离中。该膜包含固定的季铵部分，这有助于其正电荷。测试了该膜在单溶质进料系统中的性能，该系统包含测试容器中的单复价离子和二价离子（NaCl，Na_2SO_4，CaCl_2和MgSO4）的各种组合的盐以及螺旋组件，该组件给出了这些溶质具有高分离度的差异分离曲线。 CaCl_2的高排斥性和Na_2SO_4的低排斥性。膜的2512螺旋组件进一步用于分离含硝酸铀酰的模拟流出物溶液，硝酸铀酰是核工业中产生的常见流出物。膜对硝酸铀酰的分离度高，对硝酸铵的分离度低，表明当两种溶质一起存在于核废液中时，两种溶质均可被膜分离。

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