Valorization of forest by-products as bio-adsorbents for emerging contaminants

Rodríguez López, Lucía; Santas Miguel, Vanesa; Cela Dablanca, Raquel; Pérez Rodríguez, Paula; Núñez Delgado, Avelino; Álvarez Rodríguez, Esperanza; Rodriguez Seijo, Andrés; Arias Estévez, Manuel

doi:10.1016/j.jece.2023.111437

Rodríguez López, Lucía

; Santas Miguel, Vanesa

; Cela Dablanca, Raquel; Pérez Rodríguez, Paula

; Núñez Delgado, Avelino; Álvarez Rodríguez, Esperanza; Rodriguez Seijo, Andrés

; Arias Estévez, Manuel

DATE: 2023-12

UNIVERSAL IDENTIFIER: http://hdl.handle.net/11093/5360

EDITED VERSION: https://linkinghub.elsevier.com/retrieve/pii/S2213343723021760

UNESCO SUBJECT: 3199 Otras Especialidades Agrarias

DOCUMENT TYPE: article

ABSTRACT

The use of forest by-products as bio-adsorbents allows the recycling of these materials and could reduce the risks of environmental pollution due to different contaminants. This study focuses on the adsorption and release of three antibiotics (ciprofloxacin, clarithromycin and trimethoprim) on pine and oak bark materials and how pHinfluences in these processes. The results showed that the highest adsorption potential corresponds to pine bark, where the Freundlich affinity coefficient varies between 126.6 and 2979.1 Ln µmol1− n kg− 1, while, for oak bark, between 283.9 and 806.9 Ln µmol1− n kg− 1. Both bio-adsorbents show some influence of the pH affectingadsorption. Of the three antibiotics, clarithromycin was the most mobile. In general, both by-products gave satisfactory results as bio-adsorbents for the antibiotics tested. Therefore, their potential use as decontaminants could help to face environmental issues due to these emerging pollutants, reducing human and ecological risk, while contributing to a zero-waste economy.

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