Abstract
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.
Highlights
In current times, the balance of water quality is getting disturbed by various factors, such as natural calamities, anthropogenic activities, etc
Removal rate of the MIP1 and MIP2 composite cryogel cartridges from synthetic wastewater samples was determined as 98.8%
The 500 mg/L Cd(II) solution was spiked in 10 mL of the artificial wastewater sample, and the sample was treated with MIP1 and MIP2 composite cryogel cartridges at a flow rate of 1.0 mL/min at room temperature for 2 h
Summary
The balance of water quality is getting disturbed by various factors, such as natural calamities, anthropogenic activities, etc. The removal of heavy metals from polluted wastewaters requires. It is obvious that remediation technologies require new, proficient, highly specific, selective, and sensitive materials for the removal of toxic and other contaminants. Cryogels have disadvantages such as a low surface area, and a low adsorption capacity for the removal of metals. Ion-imprinted polymer beads were used for the selective separation of Cd(II) ions from the solution. Cd(II) adsorption and selectivity studies of cadmium versus other metal ions are reported here. The use of cryogels is promising in cases where the selective removal of imprinted metal ions from a complex mixture like wastewater is crucial [38]
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