Selective Transport of Cu(II) across a Polymer Inclusion Membrane with 1-Alkylimidazole from Nitrate Solutions
Selective Transport of Cu(II) across a Polymer Inclusion Membrane with 1-Alkylimidazole from Nitrate Solutions
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DOI：
10.1080/01496395.2011.646378
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发表时间：
2012-01-01
影响因子：
2.8
通讯作者：
Ulewicz, Malgorzata
中科院分区：
文献类型：
--
作者：
Radzyminska-Lenarcik, Elzbieta;Ulewicz, Malgorzata
本文报道了铜（II）、锌（II）、钴（II）和镍（II）离子在硝酸溶液中通过聚合物包合膜（pim）的选择性传输，该包合膜由三醋酸纤维素作为聚合物载体，邻硝基苯基戊醚作为增塑剂，1-烷基咪唑（烷基从己基变为癸基）作为离子载体。采用原子力显微镜（AFM）技术对PIM进行了表征。结果表明，Cu（II）与Zn（II）、Co（II）、Ni（II）等过渡金属阳离子(浓度均为10（-3)mol/dm(3)）的分离效果较好。咪唑环上1号位置的烷基取代基影响了金属离子的疏水性和初始通量。1-烷基咪唑对金属离子的分离效率依次为：Cu(II) > Zn(II) > Co(II) > Ni（II）。在PIM中，1-己基咪唑及其1 mol/dm(3)溶液对Cu（II）的选择性系数最高。离子的分离对硝酸盐(V)比氯化物更有效。
The selective transport of copper(II), zinc(II), cobalt(II), and nickel(II) ions from nitrate solutions across polymer inclusion membranes (PIMs), which consist of cellulose triacetate as polymeric support, o-nitrophenyl pentyl ether as plasticizer, and 1-alkylimidazole (alkyl from hexyl-to decyl) as ion carrier was reported. PIM was characterized by using atomic force microscopy (AFM) technique. The results show that Cu(II) can be separated very effectively from other transition metal cations as Zn(II), Co(II), and Ni(II) (at a concentration of 10(-3) mol/dm(3) each). Alkyl substituents at position 1 of the imidazole ring have been found to affect the hydrophobic properties and initial flux of the transported metal ions. The efficiency of separation of metal ions by 1-alkylimidazole followed the sequence: Cu(II) > Zn(II) > Co(II) > Ni(II). The highest selectivity coefficient for Cu(II) was found with 1-hexylimidazole and its 1 mol/dm(3) solution in PIM. Separation of the ions was more effective for the nitrates(V) than for chlorides.