Preparation of the thermosensitive metal ion imprinted polymer in supercritical carbon dioxide: application in the selective recognition of copper (II)

2011 ◽  
Vol 23 (8) ◽  
pp. 1174-1180 ◽  
Author(s):  
Li-Juan Zhang ◽  
Li-Qin Cao ◽  
Xiao-Hu Wang ◽  
Ji-De Wang
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Metal Ion ◽  
Selective Recognition ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Ion Imprinted ◽  
Supercritical Carbon

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.

Characterization and adsorptive properties of poly(1-vinylimidazole)/silica nanocomposites synthesized in supercritical carbon dioxide

e-Polymers ◽  
2015 ◽  
Vol 15 (4) ◽  
pp. 245-254 ◽  
Author(s):  
Wei Wang ◽  
Liqin Cao ◽  
Jide Wang ◽  
Jie Zhao ◽  
Xiujuan Wu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Metal Ion ◽  
Maximum Adsorption Capacity ◽  
Hydroxyl Groups ◽  
One Pot ◽  
Nanocomposite Particles ◽  
Silica Nanocomposite ◽  
Supercritical Carbon

AbstractPoly(1-vinylimidazole) (PVIm)/silica nanocomposite particles were prepared via free radical polymerization of VIm in the presence of unmodified silica and crosslinker N,N′-methylenebisacrylamide without any surfactant by a one-pot route in supercritical carbon dioxide. The strong acid-base interaction between the hydroxyl groups (acidic) of silica surfaces and the imidazole groups (basic) of 1-VIm was strong enough to promote the formation of long-stable PVIm/silica nanocomposite particles. Transmission electron microscopy and scanning electron microscopy results showed that the silica nanoparticles were encapsulated into the polymer and with a specific pore structure. Fourier transform infrared spectroscopy results suggested the strong interaction between PVIm and silica. The nanocomposites were shown to possess higher thermal stability than PVIm. A maximum surface area of 60.76 m2/g was obtained via standard nitrogen adsorption analysis. The property of the composite materials in terms of heavy metal ion removal was investigated. The maximum adsorption capacity of Cr (VI) is 331.5 mg/g in the experimental range.

Application of a metal ion-imprinted polymer based on salen–Cu complex to flow injection preconcentration and FAAS determination of copper

Talanta ◽  
2008 ◽  
Vol 76 (1) ◽  
pp. 96-101 ◽  
Author(s):  
Stanisław Walas ◽  
Anna Tobiasz ◽  
Marta Gawin ◽  
Bartosz Trzewik ◽  
Marcin Strojny ◽  
...  
Keyword(s):  
Flow Injection ◽  
Metal Ion ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Cu Complex ◽  
Ion Imprinted ◽  
Determination Of Copper
Sign in / Sign up

Export Citation Format

Share Document