Adsorption of Ciprofloxacin on Clay Minerals in Argentinian Santa Rosa-Corrientes Soils

The presence of antibiotics in soils is increasing drastically in last decades due to the intensive farming industry and excessive human consumption. Clay minerals are one of the soil components with great adsorption capacity for organic pollutants. The study of interactions between antibiotics and...

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Published inMolecules (Basel, Switzerland) Vol. 29; no. 8; p. 1760
Main Authors Jorge, Nelly L, Garrafa, María V, Romero, Jorge M, Jorge, María J, Jorge, Lilian C, Delfino, Mario R, Meruvia-Rojas, Yumeida V, Hernández-Laguna, Alfonso, Sainz-Díaz, C Ignacio
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 01.04.2024
Subjects
Adsorption
adsorption/desorption isotherms
Analysis
Antibiotics
Ciprofloxacin
Clay
DFT
Drug dosages
Farming
force field
Livestock
Manures
Minerals
Montmorillonite
Oxytetracycline
Pollutants
soil pollution
Soils
Temperature
Argentina
Spain
force field
montmorillonite
DFT
adsorption/desorption isotherms
molecular modelling
soil pollution
ciprofloxacin
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Summary:The presence of antibiotics in soils is increasing drastically in last decades due to the intensive farming industry and excessive human consumption. Clay minerals are one of the soil components with great adsorption capacity for organic pollutants. The study of interactions between antibiotics and mineral surfaces will give us scientific knowledge of these pollutants through soils. In this work, we study the adsorption of the antibiotic ciprofloxacin in the clay mineral fraction of soils from the Argentinian zone of Santa Rosa (Corrientes), in a collaborative research of experiments and atomistic modelling calculations of the intercalation of ciprofloxacin in the interlayer space of montmorillonite. Adsorption and desorption isotherms were performed and compared with different isotherm models. Additionally, enthalpy, entropy, and free energy were determined from equilibrium constants at a function of temperature. All these experiments and calculations lead to the conclusions that two adsorption types of ciprofloxacin are found on clay minerals: one weakly sorbed that is released during the desorption experiments, and other one strongly joined that remains in the soil.
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ISSN:1420-3049
1420-3049
DOI:10.3390/molecules29081760