School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300, Nibong Tebal, Penang, Malaysia.
Instituto Tecnológico de Aguascalientes, Aguascalientes, 20256, México.
Environ Sci Pollut Res Int. 2023 Dec;30(60):124596-124609. doi: 10.1007/s11356-022-20815-9. Epub 2022 May 24.
This study reports the analysis of diclofenac removal from aqueous solution using a novel adsorbent coating with amphoteric surface. This adsorbent coating was improved using a new amphoteric ratio to increase its performance for the removal of pharmaceuticals such as diclofenac. The adsorbent coating was formulated using acrylic polymer emulsion, smectite-based clay powder and epichlorohydrin-dimethylamine to obtain a layer form via the implementation of a facile synthesis method. In a previous study, this adsorbent coating was successful to remove cationic and anionic dyes. Therefore, this research aimed to further investigate and test its application in the removal of other emerging water pollutants like pharmaceuticals. SEM, EDX, and FTIR analyses were carried out for the characterization of this novel adsorbent. The effects of adsorbent composition, diclofenac concentration, temperature, and solution pH were studied and modeled. The best conditions to improve the diclofenac adsorption was 303 K and pH 3 where the adsorption capacity was 25.59 mg/g. Adsorption isotherms and kinetics were quantified and modeled, and the corresponding adsorption mechanism was also analyzed. Diclofenac adsorption with this novel material was exothermic and spontaneous. This alternative adsorbent is promising for diclofenac removal from industrial wastewater systems.
本研究报告了使用具有两性表面的新型吸附剂涂层从水溶液中去除双氯芬酸的分析。为了提高其对双氯芬酸等药物的去除性能，使用新的两性比来改进这种吸附剂涂层。该吸附剂涂层是通过使用丙烯酸聚合物乳液、基于蒙脱石的粘土粉末和表氯醇-二甲胺来制备的，通过实施简单的合成方法获得层状形式。在之前的研究中，这种吸附剂涂层成功地去除了阳离子和阴离子染料。因此，本研究旨在进一步研究并测试其在去除其他新兴水污染物（如药物）方面的应用。对这种新型吸附剂进行了 SEM、EDX 和 FTIR 分析。研究并模拟了吸附剂组成、双氯芬酸浓度、温度和溶液 pH 的影响。为了提高双氯芬酸吸附的最佳条件是 303 K 和 pH 3，此时吸附容量为 25.59 mg/g。对吸附等温线和动力学进行了量化和建模，并分析了相应的吸附机制。这种新型材料对双氯芬酸的吸附是放热和自发的。这种替代吸附剂有望用于从工业废水系统中去除双氯芬酸。
