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Separation of copper(II), cobalt(II) and nickel(II) from chloride solutions by polymer inclusion membranes

机译:聚合物包裹膜从氯化物溶液中分离铜(II),钴(II)和镍(II)

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摘要

The separation of copper(II), cobalt(II) and nickel(II) from aqueous chloride solutions by polymer inclusion membranes is presented. The tertiary amines, i.e. tri-n-octylamine (TOA) and triisooctylamine (TIOA) have been applied as the ion carriers in membrane. The source phase was an aqueous HCl solution containing Cu(II), Co(II) and Ni(II). The selective transport of Cu(II), Co(II) and Ni(II) from aqueous chloride source phase through PIM containing cellulose triacatate (CTA) as the support, o-nitrophenyl pentyl ether (ONPPE) as the plasticizer and amines (TOA and TIOA) has been studied. Cu(II) and Co(II) ions were effectively removed from the source phase by transport through PIMs with TOA and TIOA as the ionic carriers into 0.1 M NaOH as the receiving phase. The initial fluxes of Cu(II) and Co(II) were higher with TIOA than with TOA. Ni(II) was not detected in the receiving phase. The effect of chloride ions concentration on the transport of Cu(II), Co(II) and Ni(II) has been investigated. Transport of Cu(II) and Co(II) increases with increasing of chloride ions concentration in the source phase. The metal ions fluxes decrease in the order Cu(II) > Co(II) > Ni(II).
机译:提出了通过聚合物包裹膜从氯化物水溶液中分离铜(II),钴(II)和镍(II)的方法。叔胺,即三正辛胺(TOA)和三异辛胺(TIOA)已被用作膜中的离子载体。源相是含有Cu(II),Co(II)和Ni(II)的HCl水溶液。氯化物源相中Cu(II),Co(II)和Ni(II)的选择性转运通过PIM进行,PIM包含三羧酸纤维素(CTA)作为载体,邻硝基苯基戊基醚(ONPPE)作为增塑剂和胺类(TOA)和TIOA)。通过以TOA和TIOA作为离子载体的PIM转运到0.1 M NaOH作为接收相,可以有效地从源相中除去Cu(II)和Co(II)离子。 TIOA的Cu(II)和Co(II)的初始通量高于TOA。在接收阶段未检测到Ni(II)。研究了氯离子浓度对Cu(II),Co(II)和Ni(II)迁移的影响。 Cu(II)和Co(II)的传输随着源相中氯离子浓度的增加而增加。金属离子通量以Cu(II)> Co(II)> Ni(II)的顺序减小。

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