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基于光谱研究确定Dowex PSR2和Dowex PSR3离子交换剂对镍（II）离子的吸附机制

Determination of the Ni(II) Ions Sorption Mechanism on Dowex PSR2 and Dowex PSR3 Ion Exchangers Based on Spectroscopic Studies.

作者信息

Bąk Justyna, Sofińska-Chmiel Weronika, Gajewska Maria, Malinowska Paulina, Kołodyńska Dorota

机构信息

Department of Inorganic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 2, 20-031 Lublin, Poland.

Analytical Laboratory, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Skłodowska University, Maria Curie Skłodowska Sq. 3, 20-031 Lublin, Poland.

出版信息

Materials (Basel). 2023 Jan 9;16(2):644. doi: 10.3390/ma16020644.

DOI:10.3390/ma16020644
PMID:36676380
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9866840/
Abstract

This paper estimates the suitability of the strongly basic anion exchangers, Dowex PSR2 and Dowex PSR3, as sorbents of nickel ions in aqueous solutions. These actions are aimed at searching for new solutions due to the growing discharge of nickel into wastewaters, primarily due to its addition to steel. The nickel sorption experiments were conducted under static conditions and resulted in the optimization of pH, phase contact time, initial solution concentration, and temperature. The next step was to calculate the kinetic, isothermal, and thermodynamic parameters. Moreover, the ion exchangers were characterized by means of Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and CHN elemental analysis. It was found that the sorption process was most effective at pH 6 after 240 min and at the temperature of 293 K. The values of the thermodynamic parameters revealed that the adsorption was exothermic and spontaneous. The physicochemical analyses combined with the experimental research enabled determination of the sorption mechanism of Ni(II) ions.

摘要

本文评估了强碱性阴离子交换树脂Dowex PSR2和Dowex PSR3作为水溶液中镍离子吸附剂的适用性。由于镍向废水中的排放量不断增加，主要是因为其在钢铁生产中的添加，这些举措旨在寻找新的解决方案。镍吸附实验在静态条件下进行，对pH值、相接触时间、初始溶液浓度和温度进行了优化。下一步是计算动力学、等温线和热力学参数。此外，通过傅里叶变换红外光谱、X射线光电子能谱和CHN元素分析对离子交换剂进行了表征。结果发现，在pH值为6、240分钟后以及温度为293 K时，吸附过程最为有效。热力学参数值表明吸附是放热且自发的。物理化学分析与实验研究相结合，确定了Ni(II)离子的吸附机制。

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