Article
Thermodynamic and Kinetic Investigation of the Adsorption and Desorption of Trimethoprim and Its Main Metabolites in Mediterranean Crop Soils
Author/s | Mejías Padilla, Carmen
Santos Morcillo, Juan Luis Martín Bueno, Julia Aparicio Gómez, Irene Alonso Álvarez, Esteban |
Department | Universidad de Sevilla. Departamento de Química Analítica |
Publication Date | 2023 |
Deposit Date | 2023-01-20 |
Published in |
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Abstract | The adsorption–desorption processes of organic pollutants into the soil are one of the main factors influencing their potential environmental risks and distribution in the environment. In the present work, the adsorption ... The adsorption–desorption processes of organic pollutants into the soil are one of the main factors influencing their potential environmental risks and distribution in the environment. In the present work, the adsorption–desorption behavior of an antibiotic, trimethoprim (TMP), and two of its main metabolites, 3-desmethyltrimethoprim (DM-TMP) and 4-hydroxytrimethoprim (OH-TMP), were assessed in three Mediterranean agricultural soils with different physicochemical characteristics. Results showed that the adsorption kinetic is performed in two steps: external sorption and intraparticle diffusion. The adsorptions of the studied compounds in soils were similar and fitted to the three models but were better fitted to a linear model. In the case of DM-TMP and OH-TMP, their adsorptions were positively correlated with the soil organic matter. In addition, desorption was higher in less organic matter soil (from 1.3 to 30.9%). Furthermore, the desorptions measured for the TMP metabolites were lower than those measured in the case of TMP (from 2.0 and 4.0% for OH-TMP and DM-TMP, respectively, to 9.0% for TMP). |
Funding agencies | Ministerio de Ciencia e Innovación (MICIN). España |
Project ID. | PID2020-117641RB-I00 |
Citation | Mejías Padilla, C., Santos Morcillo, J.L., Martín Bueno, J., Aparicio Gómez, I. y Alonso Álvarez, E. (2023). Thermodynamic and Kinetic Investigation of the Adsorption and Desorption of Trimethoprim and Its Main Metabolites in Mediterranean Crop Soils. Molecules, 28 (1), 437. https://doi.org/10.3390/molecules28010437. |
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