Huseynli Sabina, Bakhshpour Monireh, Qureshi Tahira, Andac Muge, Denizli Adil
Department of Chemistry, Biochemistry Division, Hacettepe University, 06800 Ankara, Turkey.
Department of Environmental Engineering, Hacettepe University, 06800 Ankara, Turkey.
Polymers (Basel). 2020 May 18;12(5):1149. doi: 10.3390/polym12051149.
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.
在本研究中，通过使用镉（II）印迹聚（甲基丙烯酸羟乙酯 - N - 甲基丙烯酰基 -（L）- 半胱氨酸甲酯）珠粒和具有两种不同功能单体摩尔比的聚（甲基丙烯酸羟乙酯）冷冻凝胶柱，制备了复合聚合物冷冻凝胶柱。N - 甲基丙烯酰基 -（L）- 半胱氨酸甲酯用作功能单体，与镉（II）的摩尔比分别为1:1和2:1，随后分别标记为MIP1和MIP2。通过扫描电子显微镜、傅里叶变换红外光谱 - 衰减全反射和溶胀试验等多种表征方法，证实了MIP1和MIP2复合冷冻凝胶柱的结构转变。通过改变镉（II）的初始浓度、温度和pH值，测定了复合冷冻凝胶柱对镉（II）的最大吸附量。所获得的MIP1和MIP2复合冷冻凝胶柱的最大吸附容量分别为76.35和98.8 μmol/g复合冷冻凝胶。吸附研究表明，MIP2对镉（II）具有良好的吸附性能。所获得的复合冷冻凝胶柱在从水溶液中去除镉（II）方面具有选择性、可重复使用且成本低廉的潜力，并且可以多次使用而不会显著降低其吸附容量。MIP1和MIP2复合冷冻凝胶柱对合成废水样品中镉（II）的去除率测定为98.8%。所获得的冷冻凝胶柱吸附材料对废水样品中的镉（II）表现出良好的定向去除性能。
