Cellulose and Paper Department, National Research Centre, 33 El-Bohouth St., Dokki, P.O. 12622 Giza, Egypt.
Int J Biol Macromol. 2023 Dec 31;253(Pt 1):126687. doi: 10.1016/j.ijbiomac.2023.126687. Epub 2023 Sep 4.
The synthesis and characterization of a novel cellulose derivative as a potential sustainable adsorbent for cationic and anionic dyes are described through processing in ionic liquids. Cellulose was solubilized in ionic liquid with tosyl chloride to form tosyl cellulose which reacted with 4-aminophenylacetic acid through nucleophilic substitution mechanism. The new cellulose derivative was characterized and explored as an effective adsorbent for methylene blue (MB) and methyl orange (MO) removal, and the adsorption behaviors were investigated with various models. The adsorption behavior of the cellulose derivative followed Langmuir and pseudo-second-order models, and the maximum adsorption efficiency recorded 135 and 106 mg/g for MB and MO, respectively. There is possibility that the enhanced adsorption capacity of the cellulose derivative is due to the carboxylic and amino functional groups that provide sufficient active sites to enhance dye molecule affinity. The adsorption results demonstrate that the cellulose derivative containing aminophenylacetic acid was efficient adsorbent for removals of MB and MO.
通过在离子液体中的处理，描述了一种新型纤维素衍生物的合成和表征，该衍生物可用作阳离子和阴离子染料的潜在可持续吸附剂。纤维素在离子液体中用对甲苯磺酰氯溶解，形成对甲苯基纤维素，然后通过亲核取代机制与 4-氨基苯乙酸反应。对新的纤维素衍生物进行了表征，并探索了其作为有效吸附剂用于去除亚甲蓝（MB）和甲基橙（MO）的性能，并用各种模型研究了吸附行为。纤维素衍生物的吸附行为遵循朗缪尔和准二级模型，对 MB 和 MO 的最大吸附效率分别为 135 和 106 mg/g。纤维素衍生物的吸附能力增强可能是由于存在羧酸和氨基官能团，为增强染料分子的亲和力提供了足够的活性位点。吸附结果表明，含有 4-氨基苯乙酸的纤维素衍生物是去除 MB 和 MO 的有效吸附剂。
