吸附
活性炭
化学
污染物
吸热过程
啶虫脒
化学工程
动力学
放热反应
有机化学
杀虫剂
物理
益达胺
量子力学
农学
生物
工程类
作者
Lotfi Sellaoui,Almudena Gómez‐Avilés,Fatma Dhaouadi,Jorge Bedia,Adrián Bonilla‐Petriciolet,Sami Rtimi,Carolina Belver
标识
DOI:10.1016/j.cej.2022.139399
摘要
Lignin has been employed as a precursor to synthesize activated carbons with the aim of lignin-biomass revalorization. The properties of these activated carbons were compared, and the best adsorbent was employed to remove two emerging pollutants from water, acetaminophen and acetamiprid. The adsorption mechanisms of pharmaceutical and pesticide compounds were analyzed, modeled and interpreted via statistical physics models. In particular, adsorption kinetics and isotherms of acetaminophen and acetamiprid at temperatures between 20 and 60 °C were quantified experimentally. Equilibrium data were fitted to different statistical physics-based isotherm models to establish the corresponding adsorption mechanism. A double layer adsorption model with one type of functional group was the best to correlate and explain the removal of these organic molecules. Steric parameters for the adsorption of these organic compounds were also calculated thus determining that their adsorption was multi-molecular. At tested operating conditions, acetaminophen adsorption was endothermic, while acetamiprid removal was exothermic. Physical adsorption forces were expected to be responsible for the removal of both compounds. This study reports new insights on the adsorption mechanisms of relevant emerging pollutants commonly found in water worldwide.
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