Kozlowski Cezary, Zawierucha Iwona
Institute of Chemistry, Jan Dlugosz University in Czestochowa, Armii Krajowej 13/15, PL 42200 Czestochowa, Poland.
Membranes (Basel). 2025 May 12;15(5):146. doi: 10.3390/membranes15050146.
In this paper, polymer inclusion membranes (PIMs) were created using poly(vinyl chloride)-based alkyl sulfonic acid derivatives as ion carriers and dioctyl terephthalate as a plasticizer for the selective separation of Pb(II), Cu(II), and Cd(II) ions from aqueous nitrate solutions. The ion carriers were dinonylnaphthalenesulfonic acid (DNNSA) and nonylbenzenesulfonic acid (NBSA). The influence of the carrier and the plasticizer concentration in the membrane on the transport efficiency was investigated. For the PIM system, 15% wt. of carrier (DNNSA, NBSA), 20% wt. of plasticizer, and 65% wt. of polymer poly(vinyl chloride) PVC were the optimal proportions, with which the process was the most effective. Research on the transport kinetics has shown that the transport of Pb(II) ions through PIMs containing acidic carriers adheres to a first-order kinetics equation, which is characteristic of a facilitated transport mechanism. The activation parameter for these processes suggests that the high performance of these ion carriers is associated with the immobilization of the carrier within the membrane. It was found that PIMs based on DNNSA facilitate the selective separation of Pb(II)/Cu(II) and Pb(II)/Cd(II) mixtures, achieving high separation factors.
在本文中，以聚氯乙烯基烷基磺酸衍生物作为离子载体、对苯二甲酸二辛酯作为增塑剂制备了聚合物包容膜（PIMs），用于从硝酸盐水溶液中选择性分离Pb(II)、Cu(II)和Cd(II)离子。离子载体为二壬基萘磺酸（DNNSA）和壬基苯磺酸（NBSA）。研究了膜中载体和增塑剂浓度对传输效率的影响。对于PIM体系，15%重量的载体（DNNSA、NBSA）、20%重量的增塑剂和65%重量的聚合物聚氯乙烯（PVC）为最佳比例，在此比例下该过程最为有效。传输动力学研究表明，Pb(II)离子通过含有酸性载体的PIMs的传输符合一级动力学方程，这是促进传输机制的特征。这些过程的活化参数表明，这些离子载体的高性能与载体在膜内的固定化有关。结果发现，基于DNNSA的PIMs有助于选择性分离Pb(II)/Cu(II)和Pb(II)/Cd(II)混合物，实现高分离因子。
