Tutus Elcin, Kanmaz Nergiz, Hayri-Senel Tugba, Demircivi Pelin, Nasun-Saygili Gulhayat, Erdol-Aydin Nalan
Chemical Engineering Department, Chemical and Metallurgical Faculty, Istanbul Technical University, 34469, Maslak, Istanbul, Türkiye.
Department of Chemical Engineering, Faculty of Engineering, Yalova University, 77200, Yalova, Türkiye.
Sci Rep. 2025 May 22;15(1):17863. doi: 10.1038/s41598-025-03127-z.
The present study focuses on solvothermal in-situ synthesis of copper-based metal-organic framework (Cu-MOF) supported montmorillonite (MMT) composites (CuMMT) with various Cu-MOF mass ratios (5%, 10%, and 20%) and examine these composites as adsorbents for adsorption of tetracycline (TC) antibiotic. CuMMT composites were characterized by performing FTIR, XRD, BET/N, SEM, and zeta potential analyses. The impacts of temperature, initial antibiotic concentration, contact time, and solution pH on adsorption were investigated deeply. The pseudo-second-order and Elovich kinetic models were consistent with the obtained kinetic results which proposed chemical interactions. According to the studies, the monolayer Langmuir isotherm model fits the adsorption systems rather well. TC adsorption constituted a spontaneous endothermic reaction. As a result of the adsorption experiments, 10CuMMT composite showed the highest adsorption capacity as 319.57 mg g at a contact time of 240 min, pH 7.32 (natural pH of TC solution), at a temperature of 318 K. To enhance the TC adsorption process, the Box-Behnken experimental design was used. The optimized conditions (contact time = 200 min; solid/liquid ratio = 0.08 g L; temperature = 318 K) enhanced TC adsorption capacity to 330.70 mg g.
本研究聚焦于溶剂热原位合成不同铜基金属有机框架（Cu-MOF）质量比（5%、10%和20%）的负载蒙脱石（MMT）复合材料（CuMMT），并将这些复合材料作为吸附剂用于吸附四环素（TC）抗生素。通过傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、比表面积分析（BET/N）、扫描电子显微镜（SEM）和zeta电位分析对CuMMT复合材料进行了表征。深入研究了温度、初始抗生素浓度、接触时间和溶液pH值对吸附的影响。拟二级动力学模型和埃洛维奇动力学模型与所获得的表明存在化学相互作用的动力学结果一致。根据研究，单层朗缪尔等温线模型能较好地拟合吸附体系。TC吸附构成自发吸热反应。吸附实验结果表明，在318K温度、240分钟接触时间、pH值7.32（TC溶液自然pH值）条件下，10%CuMMT复合材料表现出最高吸附容量，为319.57mg/g。为了强化TC吸附过程，采用了Box-Behnken实验设计。优化条件（接触时间 = 200分钟；固液比 = 0.08g/L；温度 = 318K）将TC吸附容量提高到330.70mg/g。
