Synthesis of multi-ion imprinted polymers based on dithizone chelation for simultaneous removal of Hg²⁺, Cd²⁺, Ni²⁺ and Cu²⁺ from aqueous solutions

Abstract

Simultaneous analysis and removal of various heavy metal ions has received increasing concerns because they are usually co-existent with different toxicological effects. Ion imprinted polymers (IIPs) can effectively identify water-soluble ions especially heavy metal ions, however, multi-ion imprinting is rarely performed owing to possible cross-reactivity and matrix interferences. In this work, a novel and generally applicable IIPs strategy was proposed for simultaneous preconcentration and removal of four heavy metal ions based on dithizone chelation. Multi-ion imprinted polymers (MIIPs) embedded in a sol-gel matrix were prepared by using Hg Consequently, the MIIPs were used as solid-phase extraction sorbents for preconcentration of trace Hg 2+ , Cd 2+ , Ni 2+ and Cu 2+ , presenting high detectability up to 6.0-22.5 ng L À1 and satisfactory recoveries ranging from 94.7-110.2% in seawater samples. The developed MIIPs-based method proved to be a practically feasible method in heavy metal removal and water pretreatment.

Molecularly Imprinted Polymers for Removal of Metal Ions: An Alternative Treatment Method

“…A multi-ion imprinting method was proposed for pre-concentration and removal of different ions (copper (II), mercury (II), cadmium (II) and nickel (II)) by Fu et al [27]. The physical and chemical properties of multi-ion imprinted polymeric sorbents were characterized by various analyses.…”

Advances in molecularly imprinted supramolecular technology for monitoring and controlling trace environmental pollutants

“…附能力, 分子动力学模拟和红外光谱分析证明其印迹 作用源于模板分子与功能单体2-乙烯基吡啶之间的 氢键作用. Fu等 [80] 的研究结果表明, 多模板印迹技术 同样适用于多种重金属离子的同时选择性吸附去除.…”

Pressure-Stable Imprinted Polymers for Waste Water Remediation

“…The strong metal-ligand forces allow for specificity of binding, but some of the acrylate sites also bind other ions in the water, helping to reduce hardness at the same time. The efficacy of this approach has been demonstrated using resins imprinted with Pb +2 , Cd +2 , Hg +2 , Zn +2 , Cs + , Fe +3 , Cu +2 , Ag + , Cr +3 , As +3 , and Cu +2 cations [9,10,11,12,13,14,15,16,17,18,19].…”