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

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.

Sulfobetaine Cryogels for Preferential Adsorption of Methyl Orange from Mixed Dye Solutions

“…In some cases, the removal efficiency is higher with the nicotinamide modification, notably Zn(II), Al(III), or Cu(II), while in some cases such as Hg(II) or Pb(II), the unmodified cryogels are more effective. Using a related approach, Huseynli et al [ 10 ] employed metal cation imprinted cryogels to remove Cd(II) from water. Again, the authors used methacrylate polymers modified with cysteine methyl ester residues to generate cryogels with Cd(II) removal efficiencies reaching more than 98%.…”

Immobilization of xylanase enzyme on poly-(HEMA-co-GMA) cryogel

“…Cryogels have 3D elastic interconnected macropores, spongy morphologies and good mechanical robustness [3]. They are extremely versatile tools when converted to desired purposes [4] such as purification/adsorption of biomolecules [5][6][7][8], and removal of some pollutants [9][10][11]. Increasing the existing properties while designing cryogels will further increase their potential use in different fields [4].…”

Investigation of BSA adsorption performances of metal ion attached mineral particles embedded cryogel discs

“…They have spongy morphologies with inter-connected macroporous, elastic structures and high mechanical robustness [16]. They are multi-purpose tools that could be turn to good purpose intended practices [17], such as purification and adsorption of some biomolecules [18,19,9], removal of heavy metals, dyes, [20,21] and water treatment process [22]. The boosting of cryogel properties will carry forward its potential usage in various areas [17].…”