Adsorption of emerging pollutants on lignin-based activated carbon: Analysis of adsorption mechanism via characterization, kinetics and equilibrium studies
Entity
UAM. Departamento de Ingeniería QuímicaPublisher
ElsevierDate
2022-09-23Citation
10.1016/j.cej.2022.139399
Chemical Engineering Journal 452 (2023): 139399
ISSN
1385-8947 (print)DOI
10.1016/j.cej.2022.139399Editor's Version
https://doi.org/10.1016/j.cej.2022.139399Subjects
Acetaminophen; Acetamiprid; Activated carbon; Adsorption; QuímicaRights
© 2022 The Author(s)Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Abstract
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
Files in this item
Google Scholar:Sellaoui, L.
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Gómez Avilés, Almudena
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Dhaouadi, D.
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Bedia García-Matamoros, Jorge
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Bonilla Petriciolet, A.
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Rtimi, S.
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Belver Coldeira, Carolina
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