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

RSC Advances ◽  
2016 ◽  
Vol 6 (50) ◽  
pp. 44087-44095 ◽  
Author(s):  
Junqing Fu ◽  
Xiaoyan Wang ◽  
Jinhua Li ◽  
Yangjun Ding ◽  
Lingxin Chen

A multi-ion imprinted polymer strategy based on dithizone chelation for simultaneous removal of multiple ions in aqueous solution.

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 14916-14926 ◽  
Author(s):  
Qiugen Zhang ◽  
Jingyi Wu ◽  
Xubiao Luo

This study reveals a facile strategy to prepare magnetic Hg(ii)-ion-imprinted polymers with incorporated Fe3O4@SiO2 particles for rapid and efficient removal of Hg(ii) ions, due to the soft acid–soft base interaction of Hg(ii) and allylthiourea.


RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 54679-54692 ◽  
Author(s):  
Yan Liu ◽  
Fangfang Liu ◽  
Liang Ni ◽  
Minjia Meng ◽  
Xiangguo Meng ◽  
...  

In this paper, response surface methodology (RSM) was successfully applied to optimize the dynamic adsorption conditions for the maximum removal of Sr(ii) ion from aqueous solutions using Sr(ii) ion imprinted polymers (Sr(ii)-IIPs) as adsorbents.


2021 ◽  
Author(s):  
An Wang ◽  
Xiaoran Sun ◽  
Yinuo Yan ◽  
Simeng Bian ◽  
Kaili Fan ◽  
...  

Abstract Ion imprinted polymer, a kind of high molecular organic polymer, which can separate and enrich various metal ions in water by changing the adsorption conditions. Used humic acid as raw materials, used HNO3 and H2SO4 as modifiers to synthesize nitrosulfonated humic acid, then used it as substrate, NIPAM as the functional monomer, Pb2+ as the template ion, MBA as the crosslinking agent, K2S2O8 and NaHSO3 as initiators to prepare lead ion imprinted polymers after cross-linking reaction. Used SEM, FT-IR, TG-DSC to characterize the obtained product, and explored the structure and performance of the product. The adsorption performance of IIPs (NSA/NIPAM) was studied by ultraviolet-visible spectrophotometry (UV-vis). The results show that the maximum adsorption capacity of IIPs (NSA/NIPAM) for Pb2+ is 81.33 mg/g, the optimal number of cycles of IIPs (NSA/NIPAM) is 10, In the presence of competing ions Cu2+ and Cd2+, selectivity coefficients are 18.04 (Pb2+/Cu2+) and 19.39 (Pb2+/Cd2+). The results of simulating the thermodynamic adsorption process of the polymers with Langmuir and Freundlich thermodynamic adsorption models show that the imprinted polymer conform to the second-order kinetic model and the Langmuir thermodynamic model, and belong to monolayer chemisorption.


2020 ◽  
Author(s):  
Muhammad Ali Zulfikar ◽  
Sri Wahyuni ◽  
Muhammad Yudhistira Azis ◽  
Muhammad Bachri Amran ◽  
Handajaya Rusli ◽  
...  

2017 ◽  
Vol 9 (10) ◽  
pp. 1658-1664 ◽  
Author(s):  
C. Shi ◽  
G. S. Ding ◽  
A. N. Tang ◽  
Y. Y. Qiao

Highly selective selenite (SeO32−) ion-imprinted polymers (Se(iv)-IIPs) were prepared by the combination of surface ion-imprinting and sol–gel techniques and were then successfully used for the selective removal and preconcentration of Se(iv) in an aqueous solution.


2015 ◽  
Vol 3 (3) ◽  
pp. 1287-1297 ◽  
Author(s):  
Yan Liu ◽  
Xiangguo Meng ◽  
Min Luo ◽  
Minjia Meng ◽  
Liang Ni ◽  
...  

Scheme depicting the ion-imprinting process on GO surface by RAFT polymerization.


2011 ◽  
Vol 306-307 ◽  
pp. 705-708
Author(s):  
Qing Peng Liu ◽  
Hui Zhi Li ◽  
Hai Yan Zhuang ◽  
Mei Shan Pei

Neodymium ion imprinted polymers (IIP) were synthesized by formation of ternary complexes of neodymium ion with Vanillin Benzidine(VLB) and 4-vinylpyridine (VP) as chelating agent following copolymerizing with styrene as func­tional monomer and ethylene glycol dimethacrylate (EGDMA) as cross-linking monomer using 2,2´-azobisisobutyronitrile as initiator. Control polymers(CPs) were prepared under identical conditions without the use of neodymium imprint ion. The synthesized polymers were characterized by IR spectroscopy and elemental analyzer techniques. Of the several polymers synthesized, only the imprinted polymer formed with ternary complex of Nd3+–VLB–VP(1:1:2 IIP) showed quantitative enrichment of neodymium ion from aqueous solution.


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