Adsorption kinetics studies of ciprofloxacin in soils derived from volcanic materials by electrochemical approaches and assessment of socio-economic impact on human health

• Published in: Chemosphere (Oxford) Vol. 321; p. 138144
• Main Authors: Canales, Camila Pía, Delgado, Sebastián, Cáceres-Jensen, Lizethly, Buason, Arnar, Kristofersson, Dadi, Urdiales, Cristian, Antilén, Mónica
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01-04-2023
• Subjects: Adsorption; Adsorption kinetics models; Adsorption mechanism; Anti-Bacterial Agents; Ciprofloxacin; Cyclic voltammetry; Fluoroquinolone; Humans; Kinetics; Socioeconomic Factors; Soil; Volcanic soils; Welfare analysis; Cyclic voltammetry; Fluoroquinolone; Volcanic soils; Adsorption kinetics models; Adsorption mechanism; Welfare analysis
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2023.138144

The use of antibiotics in the livestock sector has resulted in the entry of these drugs into the soil matrix through the disposal of manure as an organic amendment. To define the fate of these drugs, it is necessary to evaluate kinetic aspects regarding transport in the soil-solution. The aim of this paper is to evaluate the adsorption kinetic parameters of Ciprofloxacin (CIPRO) in Ultisol and Andisol soil which allows obtaining main kinetic parameters (pseudo-first and pseudo-second order models) and to establish the solute transport mechanism by applying kinetic models such as the Elovich equation, Intraparticle diffusion (IPD) and, the Two-site non-equilibrium models (TSNE). The adsorption kinetics of this fluoroquinolone (FQ), on both soils derived from volcanic ashes, is developed using electrochemical techniques for their determination. The experimental amount of CIPRO adsorbed over time (Qt) data best fit with the pseudo-second order kinetic models; R2 = 0.9855, Ɛ = 10.17% and R2 = 0.9959, Ɛ = 10.77% for Ultisol and Andisol, respectively; and where CIPRO adsorption was considered time dependent for both soils but the lower adsorption capacity in Ultisol; with 17.6 ± 2.8 μmol g−1; which could mean a greater risk in environmental. Subsequently, applying models to describe solute transport mechanisms showed differences in the CIPRO adsorption extent for the fast and slow phases. Adsorption isotherms were evaluated, where Ultisol occurs on heterogenous sites as multilayers and Andisol by monolayer with similar Qmax. Finally, the socio-economic impact of antibiotic usage is presented, giving the importance of antibiotics in the livestock sector and their effects on human health.
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•Kinetics models allowed understanding the CIPRO adsorption process.•A two-stage mechanism for CIPRO sorption on Ultisol was proposed.•Andisol showed the greatest results as adsorbent for CIPRO due the OM and allophane.•A highest type-2 sites and lowest qmax could be mean a greater environmental risk.•The socio-economic aspect should be considered in the antimicrobial pollution.