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Imidazole modified acrylate-containing photocured hydrogels for the efficient removal of malachite green dye from aqueous solutions
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-07-19 , DOI: 10.1002/app.51415
Esra Duygu Aracier 1 , Oya Aydın Urucu 1 , Emrah Çakmakçi 1
Affiliation  

In this work, we aimed to prepare a simple and an efficient adsorbent for the removal of toxic, cationic dye; malachite green (MG). We reviewed many previous studies and designed our adsorbent based on the rationale that (1) acidic groups containing monomers which are capable of making hydrogen bonds (or electrostatic interactions) with MG are very effective in adsorption and (2) π-π stacking enhances the adsorption capacity. We first synthesized an imidazole-acrylate adduct and used it for the preparation of photocured hydrogels. The imidazole-acrylate adduct was characterized by H NMR and FTIR spectroscopy. The effect of experimental conditions on the MG adsorption properties of the hydrogels such as the effect of pH, time and MG concentration were also investigated. Under the optimum conditions (pH = 6 and 220 min contact time) at room temperature, the maximum adsorption capacity was found as high as 714.28 mg/g. The results showed that the adsorption process of the optimum hydrogel, which can be used 4 times without a significant loss in its adsorption capacity, fits the Langmuir isotherm model. The hydrogel adsorbent displayed good selectivity and reusability.

中文翻译:

含咪唑改性丙烯酸酯的光固化水凝胶可有效去除水溶液中的孔雀石绿染料

在这项工作中,我们旨在制备一种简单有效的吸附剂,用于去除有毒的阳离子染料;孔雀石绿 (MG)。我们回顾了许多先前的研究,并基于以下原理设计了我们的吸附剂:(1)含有能够与 MG 形成氢键(或静电相互作用)的单体的酸性基团在吸附方面非常有效;(2)π-π 堆积增强了吸附吸附能力。我们首先合成了咪唑-丙烯酸酯加合物并将其用于制备光固化水凝胶。咪唑-丙烯酸酯加合物的特征在于 H NMR 和 FTIR 光谱。还研究了实验条件对水凝胶 MG 吸附性能的影响,例如 pH、时间和 MG 浓度的影响。在室温下最佳条件(pH = 6 和 220 分钟接触时间)下,发现最大吸附容量高达 714.28 mg/g。结果表明,最佳水凝胶的吸附过程符合Langmuir等温线模型,可重复使用4次,吸附容量无明显损失。水凝胶吸附剂表现出良好的选择性和可重复使用性。
更新日期:2021-09-09
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