A competitive transport across polymeric membranes. Study of complexation and separation of ions

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• 作者：Fatima Smail ; Omar Arous ; Mourad Amara ; Hac¨¨ne Kerdjoudj
• 关键词：Complexation ; Separation ; Polyelectrolytes ; Metals ; Polymeric membranes
• 刊名：Comptes Rendus Chimie
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：16
• 期：6
• 页码：605-612
• 全文大小：672 K

文摘

The removal and separation of Cu(II), Zn(II) and Ni(II) from nitrate aqueous solutions were studied by competitive transport across cellulose triacetate plasticized membranes modified with polyelectrolytes: polyethyleneimine (PEI) and polyethyleneglycol (PEG). Competitive transport of trace ions from aqueous solutions across polymer inclusion membranes containing a mixture of the three polymers (cellulose triacetate as the support) and tris(2-ethylhexyl-phosphate) (TEHP) as the plasticizer provide the selectivity order: Cu(II) > Ni(II) > Zn(II). A long-term transport experiment was carried out to demonstrate the durability of polymer inclusion membranes. A separation of bivalents cations (Cu²⁺, Ni²⁺, Zn²⁺) and monovalent cations (K⁺ and Na⁺) is achieved.