RT Journal Article
T1 Adsorption of antibiotics on bio-adsorbents derived from the forestry and agro-food industries
A1 Míguez González, Ainoa
A1 Cela Dablanca, Raquel
A1 Barreiro Buján, Ana
A1 Rodríguez López, Lucía
A1 Rodríguez Seijo, Andrés
A1 Arias Estévez, Manuel
A1 Núñez Delgado, Avelino
A1 Fernández Sanjurjo, María J.
A1 Castillo Ramos, Ventura
A1 Álvarez Rodríguez, Esperanza
K1 Antibiotics retention
K1 Bio-adsorbents
K1 Emerging pollutants
K1 Retention
K1 Release
AB Antibiotic consumption at high levels in both human and veterinary populations pose a risk to their eventual entry into the food chain and/or water bodies, which will adversely affect the health of living organisms. In this work, three materials from forestry and agro-food industries (pine bark, oak ash and mussel shell) were investigated as regards their potential use as bio-adsorbents in the retention of the antibiotics amoxicillin (AMX), ciprofloxacin (CIP) and trimethoprim (TMP). Batch adsorption/desorption tests were conducted, adding increasing concentrations of the pharmaceuticals individually (from 25 to 600 μmol L−1), reaching maximum adsorption capacities of  12000 μmol kg−1 for the three antibiotics, with removal percentages of  100% for CIP, 98–99% adsorption for TMP onto pine bark, and 98–100% adsorption for AMX onto oak ash. The presence of high calcium contents and alkaline conditions in the ash favored the formation of cationic bridges with AMX, whereas the predominance of hydrogen bonds between pine bark and TMP and CIP functional groups explain the strong affinity and retention of these antibiotics. The Freundlich's model provided the best prediction for AMX adsorption onto oak ash and mussel shell (heterogeneous adsorption), whereas the Langmuir's model described well AMX adsorption onto pine bark, as well as CIP adsorption onto oak ash (homogeneous and monolayer adsorption), while all three models provided satisfactory results for TMP. In the present study, the results obtained were crucial in terms of valorization of these adsorbents and their subsequent use to improve the retention of antibiotics of emerging concern in soils, thereby preventing contamination of waters and preserving environment quality.
PB Elsevier
SN 0013-9351
YR 2023
FD 2023
LK https://hdl.handle.net/10347/38500
UL https://hdl.handle.net/10347/38500
LA eng
NO Míguez-González, A., Cela-Dablanca, R., Barreiro, A., Rodríguez-López, L., Rodríguez-Seijo, A., Arias-Estévez, M., Núñez-Delgado, A., Fernández-Sanjurjo, M. J., Castillo-Ramos, V., & Álvarez-Rodríguez, E. (2023). Adsorption of antibiotics on bio-adsorbents derived from the forestry and agro-food industries. Environmental Research, 233, 1-8. https://doi.org/10.1016/j.envres.2023.116360
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. Funding for open access charge: Universidad de Granada / CBUA.
DS Minerva
RD 24 abr 2026