Department of Chemistry, University of Malakand, Chakdara 18800, Lower Dir, Khyber Pakhtunkhwa, Pakistan.
Department of Biochemistry, University of Malakand, Chakdara 18800, Lower Dir, Khyber Pakhtunkhwa, Pakistan.
Molecules. 2023 Feb 6;28(4):1555. doi: 10.3390/molecules28041555.
Herein, a molecularly imprinted polymer (MIP) was prepared using bulk polymerization and applied to wastewater to aid the adsorption of targeted template molecules using ethylene glycol dimethacrylate (EGDMA), methacrylic acid (MAA), acid black-234 (AB-234), 2,2'-azobisisobutyronitrile (AIBN), and methanol as a cross linker, functional monomer, template, initiator, and porogenic solvent, respectively. For a non-molecularly imprinted polymer (NIP), the same procedure was followed but without adding a template. Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and a surface area analyzer were used to determine the surface functional groups, morphology and specific surface area of the MIP and NIP. At pH 5, the AB-234 adsorption capability of the MIP was higher (94%) than the NIP (31%). The adsorption isotherm data of the MIP correlated very well with the Langmuir adsorption model with Qm 82, 83 and 100 mg/g at 283 K, 298 K, and 313 K, respectively. The adsorption process followed pseudo-second-order kinetics. The imprinted factor (IF) and Kd value of the MIP were 5.13 and 0.53, respectively. Thermodynamic studies show that AB-234 dye adsorption on the MIP and NIP was spontaneous and endothermic. The MIP proved to be the best selective adsorbent for AB-234, even in the presence of dyes with similar and different structures than the NIP.
在此，使用本体聚合制备了分子印迹聚合物（MIP），并将其应用于废水中，以使用乙二醇二甲基丙烯酸酯（EGDMA）、甲基丙烯酸（MAA）、酸性黑 234（AB-234）、2,2'-偶氮二异丁腈（AIBN）和甲醇作为交联剂、功能单体、模板、引发剂和致孔剂，分别吸附目标模板分子。对于非分子印迹聚合物（NIP），遵循相同的程序，但不添加模板。傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）和比表面积分析仪用于确定 MIP 和 NIP 的表面官能团、形态和比表面积。在 pH 5 下，MIP 对 AB-234 的吸附能力（94%）高于 NIP（31%）。MIP 的吸附等温线数据与 Langmuir 吸附模型非常吻合，在 283 K、298 K 和 313 K 时，Qm 值分别为 82、83 和 100 mg/g。吸附过程遵循准二级动力学。MIP 的印迹因子（IF）和 Kd 值分别为 5.13 和 0.53。热力学研究表明，AB-234 染料在 MIP 和 NIP 上的吸附是自发和吸热的。MIP 被证明是 AB-234 的最佳选择性吸附剂，即使在存在与 NIP 结构相似和不同的染料的情况下也是如此。
