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Preconcentration of Nickel from Aqueous Environment Using Microspheric Nickel(II) Ion Imprinted Polymer
Journal of Water Chemistry and Technology ( IF 0.6 ) Pub Date : 2021-11-19 , DOI: 10.3103/s1063455x21050039
Behisht Ara 1 , Salma Amir 1 , Mian Muhammad 2 , Zakia Minhas 2 , Tanveer Ul Haq Zia 3
Affiliation  

Abstract

Solid-phase extraction based on molecularly imprinted polymer is developed for rapid, simple and selective preconcentration/determination of Ni(II) from aqueous solutions. Ni(II) dimethylglyoxime (DMG/Ni(II)) complex was synthesized and polymerized with cross-linker (divinyl benzene) to obtain ion imprinted polymer [poly(DVB-DMG/Ni(II))] of Ni(II). Ni(II)IIP was prepared by precipitation polymerization using dimethylglyoxime as ligand, Ni(II) as a metal ion, methacrylic acid as a functional monomer, divinyl benzene as a crosslinking agent and 2,2'-azobisisobutyronitrile as an initiator. The mixture was polymerized thermally, after polymerization, the metal was leached with a washing solvent. Blank polymer was synthesized under the same condition but in the absence of ligand and metal ion. Optimization of crosslinker, monomer and amount of Ni(DMG) was done and it was found that the optimized value for crosslinker is 0.30 mmol, monomer 3 mmol and Ni(DMG) is 8 mL. The polymer exhibited 99.98% adsorption in the presence of Zn(II), 72.50% in the presence of Mg(II), Ca(II) and Cu(II) and 73.48% in the presence of Co(II), and less than 70% adsorption was observed in the presence of Fe(II) and Cd(II). The maximum binding of Ni(II) was obtained with [poly(DVB-DMG/Ni(II))] after optimizing the amount of crosslinker, monomer and Ni(II) DMG complex for its synthesis, and the experimental parameters like effect of pH, polymer quantity, temperature and contact time during adsorption experiments. Poly(DVB-DMG/Ni(II)) microbeads were used three times without significant loss in adsorption capacity. Determination of Ni(II) in real water samples showed that the interfering matrix had been removed during preconcentration of Ni(II) from real samples on poly(DVB-DMG/Ni(II)).



中文翻译:

使用微球镍 (II) 离子印迹聚合物从水环境中预浓缩镍

摘要

开发了基于分子印迹聚合物的固相萃取,用于快速、简单和选择性地从水溶液中预浓缩/测定 Ni(II)。合成Ni(II)二甲基乙二肟(DMG/Ni(II))配合物并与交联剂(二乙烯基苯)聚合得到Ni(II)的离子印迹聚合物[聚(DVB-DMG/Ni(II))]。Ni(II)IIP 是以二甲基乙醛肟为配体、Ni(II) 为金属离子、甲基丙烯酸为功能单体、二乙烯基苯为交联剂、2,2'-偶氮二异丁腈为引发剂的沉淀聚合反应制备的。混合物进行热聚合,聚合后用洗涤溶剂浸出金属。空白聚合物在相同条件下合成,但不存在配体和金属离子。交联剂的优化,对单体和Ni(DMG)的用量进行了实验,发现交联剂的优化值为0.30 mmol,单体为3 mmol,Ni(DMG)为8 mL。聚合物在 Zn(II) 存在下的吸附率为 99.98%,在 Mg(II)、Ca(II) 和 Cu(II) 存在下为 72.50%,在 Co(II) 存在下为 73.48%,小于在 Fe(II) 和 Cd(II) 存在下观察到 70% 的吸附。Ni(II)与[poly(DVB-DMG/Ni(II))]在优化交联剂、单体和Ni(II)DMG配合物的合成量以及实验参数如吸附实验中的 pH 值、聚合物数量、温度和接触时间。聚 (DVB-DMG/Ni(II)) 微珠使用 3 次,吸附能力没有显着损失。

更新日期:2021-11-20
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