Erdem Yayayürük Aslı, Çankaya Nevin, Yayayürük Onur
Faculty of Science, Department of Chemistry, Ege University, İzmir 35100, Turkey.
Vocational School of Health Services-Oral and Dental Health Department, Uşak University, Uşak 64200, Turkey.
ACS Omega. 2024 Dec 12;9(51):50147-50157. doi: 10.1021/acsomega.4c00354. eCollection 2024 Dec 24.
A novel environmentally friendly adsorbent, poly(limonene--divinylbenzene--2-acrylamido-2-methyl-1-propanesulfonic acid, LIM--DVB--AMPS), was synthesized and applied for the adsorption of methylene blue from aqueous solutions in this study. The structure, morphology, and thermal stability of the green adsorbent were determined by the FTIR, SEM, TGA/DTA/DTG, and BET techniques, ζ potential, and elemental analysis. The efficiency of the adsorption process was improved with respect to several experimental conditions, viz., adsorbent dose, pH, and contact time. The adsorption process was found to fit very well with the Langmuir isotherm and the pseudo-second-order model. Benefiting from the higher number of surface sites, porous structure, and good surface area, poly(LIM--DVB--AMPS) particles exhibited a superior adsorption performance for MB with a Langmuir adsorption capacity of 98 mg g. The selectivity of the sorbent does not depend on the coexisting ions, and the sorbent is applicable in complex matrixes in the presence of these ions. The elution process was employed using ethanol within a 1.0 M hydrochloric acid (HCl) medium, leading to a remarkable usability exceeding 90% even after five consecutive adsorption/desorption cycles. Spike recovery experiments conducted using real water samples substantiate the practical applicability of the adsorbent. The high efficiency, utilization of cost-effective materials, and ease of fabrication, coupled with their selective nature and lower environmental impact through sorbent reuse, collectively confer superior advantages. These distinctive features render the environmentally benign adsorbent highly applicable for promising applications in the removal of methylene blue from aqueous solutions.
本研究合成了一种新型环保吸附剂聚（柠檬烯 - 二乙烯基苯 - 2 - 丙烯酰胺 - 2 - 甲基 - 1 - 丙磺酸，LIM - DVB - AMPS），并将其用于从水溶液中吸附亚甲基蓝。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、热重/差热/微商热重联用（TGA/DTA/DTG）、比表面积分析仪（BET）技术、ζ电位和元素分析确定了这种绿色吸附剂的结构、形态和热稳定性。考察了吸附剂用量、pH值和接触时间等几个实验条件对吸附过程效率的影响。发现吸附过程非常符合朗缪尔等温线和准二级动力学模型。聚（LIM - DVB - AMPS）颗粒由于具有更多表面位点、多孔结构和良好的比表面积，对亚甲基蓝表现出优异的吸附性能，朗缪尔吸附容量为98 mg/g。吸附剂的选择性不依赖于共存离子，在这些离子存在的情况下，该吸附剂适用于复杂基质。采用在1.0 M盐酸（HCl）介质中用乙醇进行洗脱过程，即使经过连续五次吸附/解吸循环，其显著的可用性仍超过90%。使用实际水样进行的加标回收率实验证实了该吸附剂的实际适用性。其高效性、使用经济高效的材料、易于制备，再加上其选择性和通过吸附剂再利用对环境影响较小，共同赋予了其卓越的优势。这些独特的特性使得这种环境友好型吸附剂在从水溶液中去除亚甲基蓝的应用中极具前景。
