RT Journal Article T1 Simultaneous adsorption of amoxicillin and ciprofloxacin on agricultural soils and by-products used as bio-adsorbents: unraveling the interactions in complex systems A1 Cela Dablanca, Raquel A1 Míguez González, Ainoa A1 Barreiro Buján, Ana A1 Rodríguez López, Lucía A1 Arias Estévez, Manuel A1 Núñez Delgado, Avelino A1 Fernández Sanjurjo, María J. A1 Castillo Ramos, Ventura A1 Álvarez Rodríguez, Esperanza K1 Antibiotics pollution K1 Crop soils K1 Emerging pollutants K1 Release K1 Retention K1 Synergistic adsorption AB The presence of pharmaceuticals in agricultural soils, like amoxicillin (AMX) and ciprofloxacin (CIP), poses a significant environmental challenge with potential implications for ecosystems and human well-being. This study explores the simultaneous adsorption of AMX and CIP on crop soils and bio-adsorbents, focusing on competitive adsorption dynamics. Tests were conducted with varying pharmaceutical concentrations in six soils and three bio-adsorbents. CIP consistently exhibited higher adsorption than AMX, particularly at higher concentrations. In the binary system, AMX's adsorption exceeded the individual system at higher concentrations, implying a synergistic effect. Bio-adsorbents, especially pine bark and oak ash, displayed superior adsorption capacities compared to soils. Some soils exhibited enhanced adsorption and retention of both antibiotics simultaneously, aligning with the cooperative adsorption model. Freundlich's adsorption model described the competitive adsorption systems well. These findings have implications for addressing antibiotic contamination in agricultural ecosystems, offering insights into complex interactions in soil environments amid rising pharmaceutical concerns. PB Elsevier SN 0013-9351 YR 2024 FD 2024 LK https://hdl.handle.net/10347/39020 UL https://hdl.handle.net/10347/39020 LA eng NO Cela-Dablanca, R., Míguez-González, A., Barreiro, A., Rodríguez-López, L., Arias-Estévez, M., Núñez-Delgado, A., Fernández-Sanjurjo, M. J., Castillo-Ramos, V., & Álvarez-Rodríguez, E. (2024). Simultaneous adsorption of amoxicillin and ciprofloxacin on agricultural soils and by-products used as bio-adsorbents: Unraveling the interactions in complex systems. Environmental Research, 240, 1-9. https://doi.org/10.1016/j.envres.2023.117535 NO This is the author’s version of the work. The definitive version was published in Environmental research, vol. 240 (2024), available online at: https://doi.org/10.1016/j.envres.2023.117535 NO The authors gratefully acknowledge the financial supports from the project “Problemas ambientales del uso de antibióticos ionóforos en producción animal: Diagnóstico, adsorción-desorción, efecto sobre los microorganismos y control con bioadsorbentes - GENERACION DE CONOCIMIENTO 2021” (PID2021-1229200B–C21) of the National Spanish Program. DS Minerva RD 24 abr 2026