Department of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran.
Department of Chemical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran.
J Contam Hydrol. 2022 Aug;249:104048. doi: 10.1016/j.jconhyd.2022.104048. Epub 2022 Jul 8.
In this study, the adsorption of benzoic acid and phenols in the aqueous phase by MOF-Cu adsorbent was investigated. A high-performance liquid chromatography (HPLC) device was used to analyze the concentration of contaminants in the solution. Three isotherms, Freundlich, Langmuir, and Temkin were performed for adsorption of Benzoic Acid (BA) and Phenol contaminants. Correlation factor for adsorption isotherms were fitted into Langmuir aqueous BA and Phenol would be 99.89 and 99.98%, respectively. The equilibrium adsorption capacity MOF-Cu of BA and Phenol is 636.73 and 524.42 mg/g, respectively. In this study, high contaminant adsorption with π-π interaction and hydrogen bonding leads to the high capacity of MOFCu. In addition, the increase in adsorption capacity of benzoic acid is due to the electronegative property of oxygen in the carbonyl group and the similarity of the carboxylic acid functional group with the adsorbent. The result shows, that at initial time adsorption, has been a non-linear trend. In addition, the first-order kinetic model is not a suitable option for fitting the experimental data of adsorption kinetics and the adsorption kinetics of BA and Phenol is very well compatible with the semi-second order with the correlation Factor being 99.7 and 99.78, respectively. Also, the equilibrium adsorption capacity in pseudo-second order kinetic for BA and Phenol is 613.5 and 523.56 mg/g respectively.
在这项研究中，研究了 MOF-Cu 吸附剂对水相中苯甲酸和酚类物质的吸附。采用高效液相色谱（HPLC）装置分析溶液中污染物的浓度。对苯甲酸（BA）和苯酚污染物的吸附进行了三种等温线，即 Freundlich、Langmuir 和 Temkin。吸附等温线的相关因子适合 Langmuir 水相 BA 和苯酚，分别为 99.89%和 99.98%。MOF-Cu 对 BA 和苯酚的平衡吸附容量分别为 636.73 和 524.42mg/g。在这项研究中，高污染物吸附与π-π 相互作用和氢键导致 MOFCu 的高容量。此外，苯甲酸吸附容量的增加是由于羰基中氧的电负性和羧酸官能团与吸附剂的相似性。结果表明，在初始吸附时间，吸附是非线性趋势。此外，一级动力学模型不是吸附动力学实验数据拟合的合适选择，BA 和苯酚的吸附动力学非常适合半二级动力学，相关因子分别为 99.7 和 99.78。此外，在拟二级动力学中，BA 和苯酚的平衡吸附容量分别为 613.5 和 523.56mg/g。
