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Composite Polymeric Cryogel Cartridges for Selective Removal of Cadmium Ions from Aqueous Solutions

1
Department of Chemistry, Biochemistry Division, Hacettepe University, 06800 Ankara, Turkey
2
Department of Environmental Engineering, Hacettepe University, 06800 Ankara, Turkey
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(5), 1149; https://doi.org/10.3390/polym12051149
Received: 28 March 2020 / Revised: 8 May 2020 / Accepted: 14 May 2020 / Published: 18 May 2020
(This article belongs to the Special Issue Polymeric Materials for Wastewater Purification)
In this study, composite polymeric cryogel cartridges were achieved by using Cd(II) imprinted poly(hydroxyethyl methacrylate N-methacryloly-(L)-cysteine methylester) beads and poly(hydroxyethyl methacrylate) cryogel cartridges with two different mole ratios of functional monomer. The N-methacryloly-(L)-cysteinemethylester was used as a functional monomer and Cd(II) 1:1 and 2:1, which were then notated as MIP1 and MIP2, respectively. Various characterization methods have confirmed the structural transformation on the MIP1 and MIP2 composite cryogel cartridges by scanning electron microscopy, Fourier-transform infrared spectroscopy-Attenuated Total Reflectance, and swelling tests. The maximum amount of Cd(II) adsorption with composite cryogel cartridges was determined by altering the Cd(II) initial concentration, temperature, and pH values. The maximum adsorption capacity of MIP1 and MIP2 composite cryogel cartridges obtained was 76.35 and 98.8 µmol/g of composite cryogels, respectively. The adsorption studies revealed that the MIP2 possessed a good adsorption performance for Cd(II). The obtained composite cryogel cartridges have a selective, reusable, and cost-friendly potential for the removal of Cd(II) from aqueous solutions, and are used many times without decreasing their adsorption capacities significantly. The Cd(II) removal rate of the MIP1 and MIP2 composite cryogel cartridges from synthetic wastewater samples was determined as 98.8%. The obtained cryogel cartridges’ adsorption material exhibited a good directional removal performance for Cd(II) from wastewater samples. View Full-Text
Keywords: Ion imprinting; Composite cryogel cartridge; Cd(II) ions; Selective adsorption; Wastewater Ion imprinting; Composite cryogel cartridge; Cd(II) ions; Selective adsorption; Wastewater
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MDPI and ACS Style

Huseynli, S.; Bakhshpour, M.; Qureshi, T.; Andac, M.; Denizli, A. Composite Polymeric Cryogel Cartridges for Selective Removal of Cadmium Ions from Aqueous Solutions. Polymers 2020, 12, 1149.

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