Radzyminska-Lenarcik Elżbieta, Pyszka Ilona, Urbaniak Wlodzimierz
Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, 85-796 Bydgoszcz, Poland.
Faculty of Chemistry, Adam Mickiewicz University, 61-712 Poznan, Poland.
Polymers (Basel). 2021 Apr 28;13(9):1424. doi: 10.3390/polym13091424.
The new polymer inclusion membrane (PIM) with a 1-alkyltriazole matrix was used to separate palladium(II) ions from aqueous chloride solutions containing a mixture of Zn-Pd-Ni ions. The effective conditions for transport studies by PIMs were determined based on solvent extraction (SX) studies. Furthermore, the values of the stability constants and partition coefficients of M(II)-alkyltriazole complexes were determined. The values of both constants increase with the growing hydrophobicity of the 1-alkyltriazole molecule and have the highest values for the Pd(II) complexes. The initial fluxes, selectivity coefficients, and recovery factors values of for Pd, Zn and Ni were determined on the basis of membrane transport studies. The transport selectivity of PIMs were: Pd(II) > Zn(II) > Ni(II). The initial metal ion fluxes for all the cations increased with the elongation of the alkyl chain in the 1-alkyltriazole, but the selectivity coefficients decreased. The highest values of the initial fluxes at pH = 4.0 were found for Pd(II) ions. The best selectivity coefficients Pd(II)/Zn(II) and Pd(II)/Ni(II) equal to 4.0 and 13.4, respectively, were found for 1-pentyl-triazole. It was shown that the microstructure of the polymer membrane surface influences the kinetics of metal ion transport. Based on the conducted research, it was shown that the new PIMs with 1-alkyltriazole can be successfully used in an acidic medium to separate a mixture containing Pd(II), Zn(II) and Ni(II) ions.
采用具有1-烷基三唑基质的新型聚合物包容膜（PIM）从含有Zn-Pd-Ni离子混合物的氯化物水溶液中分离钯（II）离子。基于溶剂萃取（SX）研究确定了PIM进行传输研究的有效条件。此外，还测定了M（II）-烷基三唑配合物的稳定常数和分配系数值。这两个常数的值都随着1-烷基三唑分子疏水性的增加而增大，并且对于钯（II）配合物具有最高值。基于膜传输研究确定了Pd、Zn和Ni的初始通量、选择性系数和回收率因子值。PIM的传输选择性为：Pd（II）>Zn（II）>Ni（II）。所有阳离子的初始金属离子通量均随着1-烷基三唑中烷基链的延长而增加，但选择性系数降低。在pH = 4.0时，发现钯（II）离子的初始通量最高。对于1-戊基三唑，发现最佳的选择性系数Pd（II）/Zn（II）和Pd（II）/Ni（II）分别等于4.0和13.4。结果表明，聚合物膜表面的微观结构影响金属离子传输的动力学。基于所进行的研究，结果表明具有1-烷基三唑的新型PIM可以成功地用于酸性介质中，以分离含有Pd（II）、Zn（II）和Ni（II）离子的混合物。
