吸附
弗伦德利希方程
双氯芬酸钠
化学工程
化学
吸热过程
化学稳定性
环境修复
傅里叶变换红外光谱
环境污染
无机化学
色谱法
污染
有机化学
生态学
生物
环境保护
环境科学
工程类
作者
Juan L. Obeso,Herlys Viltres,Catalina V. Flores,Alfredo López‐Olvera,Amin Reza Rajabzadeh,Seshasai Srinivasan,Ilich A. Ibarra,Carolina Leyva
标识
DOI:10.1016/j.jece.2023.109872
摘要
The presence and persistence of pharmaceuticals in water affect human health, causing drug resistance and adverse effects on aquatic life. This study reports on the exceptional adsorption properties of Al(III)-based MOFs such as DUT-5 and MOF-303 for diclofenac sodium (DCF) remediation with remarkable chemical stability and cyclability. MOF-303 and DUT-5 displayed a maximum adsorption capacity of 334.89 and 103.36 mg g−1, respectively. The adsorbents exhibited high chemical stability at different pH levels ranging from 4 to 10 during adsorption. In both MOFs, the adsorption kinetic data were based on the pseudo-second-order (PSO) model. DUT-5 showed faster adsorption due to the increased diffusion because of a large surface area for this MOF material. The adsorption isotherms followed the Temkin and Freundlich models for DUT-5 and MOF-303, respectively, which suggested the involvement of physicochemical forces in the adsorption mechanisms. Thermodynamic analysis proved the endothermic nature of the adsorption for both MOFs. Interaction mechanisms such as metal-π, π-π stacking, and electrostatic interaction were proposed based on the effect of pH and support by FTIR and XPS data. Therefore, both materials are viable adsorbing agents that may considerably impact pharmaceutical wastewater treatment; even MOF-303 showed higher adsorption capacity than different reported pristine and modified MOFs. This study also explores the facile synthesis of MOF materials with efficient adsorption behavior. It confirms the potential application of hydroxo-functionalized MOFs for the remediation of wastewater contaminated with DCF.
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