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Single adsorption of diclofenac and ronidazole from aqueous solution on commercial activated carbons: effect of chemical and textural properties

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Abstract

The importance of the textural and physicochemical characteristics upon the adsorption capacity of the commercial activated carbons (ACs) Coconut, Wood, Merck, Darco, and Norit towards ronidazole (RNZ) and diclofenac (DCF) from water solution was investigated thoroughly in this work. At pH = 7, Coconut AC and Wood AC presented the highest adsorption capacity towards RNZ (444 mg/g) and DCF (405 mg/g). The maximum mass of RNZ adsorbed onto Coconut AC was higher in this study than those outlined previously in other works. Besides, the maximum capacity of Wood AC for adsorbing DCF was comparable to those found for other ACs. The adsorption capacity of all the ACs was increased by surface area and was favored by incrementing the acidic site concentration. The π-π stacking interactions were the predominant adsorption mechanism for the RNZ and DCF adsorption on ACs, and the acidic sites favored the adsorption capacity by activating the π-π stacking. Electrostatic interactions did not influence the adsorption of RNZ on Coconut AC, but electrostatic repulsion decreased that of DCF on Wood AC. The adsorption of DCF on Wood AC was reversible but not that of RNZ on Coconut AC. Besides, the adsorption of RNZ and DCF on the Coconut and Wood ACs was endothermic in the range of 15–25 °C.

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Datasets used during the current study and supplementary data are available from the corresponding author on reasonable request.

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Acknowledgements

E. Mendoza-Mendoza thanks for the financial support to CONACyT through the Catedras program, project No. 864.

Funding

This study was financially supported by Fondo de Apoyo a la Investigación (FAI)-Universidad Autonoma de San Luis Potosi (UASLP), through grant No.: C20-FAI-10–27.27.

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AIMR carried out data curation, methodology, investigation, writing—original draft preparation, and visualization. RLR performed funding acquisition, investigation, project administration, supervision, methodology, writing, reviewing, and editing. EMM accomplished conceptualization, supervision, methodology, writing, reviewing, and editing. PEDF engaged in methodology, writing—original draft preparation, and visualization. DHCA participated in data curation, methodology, and writing—original draft preparation. MFAF carried out methodology, investigation, and characterization of activated carbons. CFG performed methodology, investigation, and characterization of activated carbons.

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Correspondence to Roberto Leyva-Ramos.

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The authors declare no competing interests.

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Moral-Rodríguez, A.I., Leyva-Ramos, R., Mendoza-Mendoza, E. et al. Single adsorption of diclofenac and ronidazole from aqueous solution on commercial activated carbons: effect of chemical and textural properties. Environ Sci Pollut Res 30, 25193–25204 (2023). https://doi.org/10.1007/s11356-021-17466-7

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  • DOI: https://doi.org/10.1007/s11356-021-17466-7

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