scholarly journals Multi-templated Pb-Zn-Hg Ion Imprinted Polymer for the Selective and Simultaneous Removal of Toxic Metallic Ions from Wastewater

2017 ◽  
Vol 9 (2) ◽  
pp. 10 ◽  
Author(s):  
Morlu G. F. Stevens ◽  
Bareki S. Batlokwa
Keyword(s):  
Metal Ion ◽  
Crosslinking Agent ◽  
Bulk Polymerization ◽  
Complexing Agent ◽  
Simultaneous Removal ◽  
Ion Imprinted Polymer ◽  
Metallic Ions ◽  
Operational Parameters ◽  
Imprinted Polymer ◽  
Ion Imprinted

A multi-templated Pb-Zn-Hg ion imprinted polymer was synthesized to demonstrate the selective and simultaneous removal of the named targeted ions. Molecular Imprinting Technology was employed, guided by thermal bulk polymerization method, methacrylic acid as the functional monomer and ethylene glycol dimethylacrylate as crosslinking agent in the presence of the initiator azobisisobutyronitrile; Pb(II), Zn(II) and Hg(II) ions as template ions, and 1,10-phenanthroline as the complexing agent. Rigorous, optimal template removal method was employed. Physical and chemical properties of the sorbent were investigated using Fourier Transform Infrared Spectroscopy, X-ray Diffraction and Atomic Force Microscopy. Operational parameters: time, pH and sorbent dosage for the rebinding batch experiments were optimized and found to be 15 min, 7.5 and 666.7 mg/L respectively. Percentage recoveries of the removed targeted ions from spiked samples were: 92.14 ± 0.16%, 106.09 ± 0.17% and 99.86 ± 0.04%. The synthesized sorbents showed good selectivity towards the targeted metal ion by removing 90% - 98% of the templated ions as compared to 58% - 62% of the competitive ions.

scholarly journals Preparation of Nitrosulfonated Humic Acid-based Ion-imprinted Polymer and Study on Its Adsorption Properties

2021 ◽  
Author(s):  
An Wang ◽  
Xiaoran Sun ◽  
Yinuo Yan ◽  
Simeng Bian ◽  
Kaili Fan ◽  
...  
Keyword(s):  
Humic Acid ◽  
Crosslinking Agent ◽  
Organic Polymer ◽  
Lead Ion ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Ion Imprinted ◽  
Ion Imprinted Polymers

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.

Synthesis, Characterization and Selective Recognition of Lead Using a New Ion Imprinted Polymer Material

2011 ◽  
Vol 306-307 ◽  
pp. 688-691 ◽  
Author(s):  
Hai Yan Zhuang ◽  
Hui Zhi Li ◽  
Yang Xue
Keyword(s):  
Crosslinking Agent ◽  
Absorption Spectrometry ◽  
Lead Ion ◽  
Binary Complex ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Flame Atomic Absorption ◽  
Relative Standard ◽  
Ion Imprinted

A new ion-imprinted polymer (IIP) material was synthesized by copolymerization of 4-vinylpyridine(VP) as monomer, ethylene glycol dimethacrylate(EGDMA) as crosslinking agent and 2,2΄-azobisisobutyronitrile(AIBN) as initiator in the presence of Pb–1,5-diphenylcarbazone(Pb-DHCB) complex. Blank non-imprinted polymer (NIP) were prepared under identical conditions without the use of lead 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 binary complex of Pb2+–DHCB showed quantitative enrichment of lead ion from aqueous solution. The relative standard deviation of the five replicate determinations of Pb (II) was3.26%. The detection limit for 150 mL of sample was 1.6 µg L-1 using flame atomic absorption spectrometry. The developed method was successfully applied to the determination of trace lead in environmental samples with satisfactory results.

Preparation and adsorption characteristics of an imprinted polymer for selective removal of Cr(vi) ions from aqueous solutions

2014 ◽  
Vol 2 (42) ◽  
pp. 17952-17961 ◽  
Author(s):  
Zhongqi Ren ◽  
Delong Kong ◽  
Keyuan Wang ◽  
Weidong Zhang
Keyword(s):  
Aqueous Solutions ◽  
Selective Adsorption ◽  
Bulk Polymerization ◽  
Functional Monomer ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
High Adsorption ◽  
Ion Imprinted ◽  
Vinyl Pyridine ◽  
High Adsorption Capacity

To achieve a fast adsorption rate and a high adsorption capacity in the selective adsorption of Cr(vi) from wastewater, a novel Cr(vi) ion imprinted polymer (Cr(vi)-IIP) was synthesized by bulk polymerization with 4-vinyl pyridine (4-VP) as a functional monomer.

Use of Nanoporous Cu(II) Ion Imprinted Polymer as a New Sorbent for Preconcentration of Cu(II) in Water, Biological, and Agricultural Samples and its Determination by Electrothermal Atomic Absorption Spectrometry

2014 ◽  
Vol 97 (4) ◽  
pp. 1159-1166 ◽  
Author(s):  
Hamid Fazelirad ◽  
Mohammad Ali Taher ◽  
Hamid Ashkenani
Keyword(s):  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Selective Extraction ◽  
Bulk Polymerization ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Polymeric Particles ◽  
Ion Imprinted ◽  
Maximum Sorption

Abstract A new and selective Cu(II) ion imprinted polymer was prepared by formation of 1-(2-pyridylazo)-2-naphthol complex for selective extraction and preconcentration of Cu ions. Polymerization was performed with ethylene glycol dimethacrylate as a crosslinking monomer and methacrylic acid as a functional monomer in the presence of 2,2′-azobis(isobutyronitrile) as an initiator via a bulk polymerization method. The Cu(II) imprinted polymeric particles were characterized by scanning electron microscopy and IR spectrometry. The imprint Cu ion was removed from the polymeric matrix using 2 M HNO3. Optimum pH for maximum sorption was 5–8. Maximum sorbent capacity and the enrichment factor for Cu(II) were 11.3 mg/g and 100, respectively. The RSD and LOD of the method were evaluated as ±4.3% and 8.7 ng/L, respectively. The proposed method is simple, highly selective, and sensitive and can be applied to the determination of ultratrace amounts of Cu in water, biological, and agricultural samples.

Preparation and Application of Nanostructure Ion-Imprinted Polymer for Selective Solid-Phase Extraction of Pb Ions in Water, Hair, and Food Samples

2016 ◽  
Vol 99 (5) ◽  
pp. 1363-1369 ◽  
Author(s):  
Maryam Dehghani Soltani ◽  
Mohammad Ali Taher ◽  
Mansoureh Behzadi
Keyword(s):  
Solid Phase ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Bulk Polymerization ◽  
Food Samples ◽  
Ion Concentration ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Ion Imprinted ◽  
Pb Ions

Abstract In this research, nanostructure Pb(II) ion-imprinted polymer (IIP) was prepared by formation of 1,5-diphenylthiocarbazon (dithizone) complex. Polymerization was performed via bulk polymerization, with methacrylic acid as the functional monomer and ethylene glycol dimethacrylate as the cross-linking monomer in the presence of ammonium persulfate as the initiator. To characterize the synthesized IIP, FTIR spectroscopy and field emission scanning electron microscopy were used. This polymer was used for selective preconcentration of ultra-trace amounts of Pb ions through the SPE method. The Pb ion concentration was determined by electrothermal atomic absorption spectrometry. In the optimization process, the effects of various factors, such as pH of the sample solution, type and concentration of eluent, equilibrium sorption and desorption times, and sample volume, were investigated. Under optimized conditions, the maximum sorbent capacity was 38.46 mg/g and the enrichment factor was 200. Linearity was within the range 1.0–320.0 ng/L, with good r2 values. The LOD was 0.55 ng/L, and the intraday and interday RSD values (n = 7, 20 ng/L Pb ions) were 2.8 and 3.5%, respectively. This selective and sensitive proposed method was applied successfully to the determination of Pb in water, hair, and food samples, with high recoveries.

Facile preparation of rubidium ion-imprinted polymer by bulk polymerization for highly efficiency separation of rubidium ions from aqueous solution

2021 ◽  
Author(s):  
Zhiyong Zhou ◽  
Yulei Hu ◽  
Zhuo Wang ◽  
Hewei Zhang ◽  
Biing Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methacrylic Acid ◽  
Bulk Polymerization ◽  
Functional Monomer ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Selective Ligand ◽  
Ion Imprinted ◽  
Facile Preparation

A novel rubidium ion-imprinted polymer (Rb+-IIP) was successfully prepared by bulk polymerization with Rb+ ion as template ion, methacrylic acid (MAA) as functional monomer, 18-crown-6 (18C6) ether as selective ligand,...

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