School of Resources and Environment, University of Electronic Science and Technology of China, P.O. Box 611731, Xiyuan Ave, Chengdu, PR China; Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran; Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein Campus, 2028, Johannesburg, South Africa.
Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran.
Environ Res. 2021 Apr;195:110809. doi: 10.1016/j.envres.2021.110809. Epub 2021 Jan 28.
In the present study, a novel 1-butyl-3-methylimidazolium bromide (BmImBr) impregnated chitosan beads were prepared and characterized using different methods, including XRD, FT-IR, EDX, SEM and BET. The FTIR analysis revealed that the BmImBr was successfully conjugated with the chitosan in the beads structure. The prepared beads were used as an efficient sorbent for the fast removal of methylene blue, as cationic dye model, from aqueous solution, whereas just 25 min was required to reach 86% removal efficiency. The increasing of BmImBr amount improved the adsorption performance of prepared beads. Also, it was found that the dye can be higher adsorbed on the beads surface by increasing the sorbent dosage and pH of solution, while the optimum dosage and pH were obtained 3 mg/L and 11, respectively. The kinetic study showed that the MB adsorption onto the CS-BmImBr beads follows the pseudo-fist order model and the intrinsic penetration controls the adsorption process. The properties of prepared chitosan- BmImBr IL conjugation confirmed that it can be exploited as an efficient adsorbent in the wastewater treatment.
在本研究中，使用不同的方法制备了一种新型的 1-丁基-3-甲基溴化咪唑（BmImBr）浸渍壳聚糖珠，并对其进行了表征，包括 XRD、FT-IR、EDX、SEM 和 BET。FTIR 分析表明，BmImBr 成功地与珠体结构中的壳聚糖结合。所制备的珠用作从水溶液中快速去除亚甲蓝（作为阳离子染料模型）的有效吸附剂，仅需 25 分钟即可达到 86%的去除效率。BmImBr 用量的增加提高了制备珠的吸附性能。此外，还发现通过增加吸附剂用量和溶液的 pH 值，可以在珠体表面更高地吸附染料，而最佳的用量和 pH 值分别为 3mg/L 和 11。动力学研究表明，MB 吸附到 CS-BmImBr 珠上遵循伪一级动力学模型，并且内扩散控制吸附过程。所制备的壳聚糖-BmImBr IL 接枝的性能证实，它可用作废水处理中的有效吸附剂。
