Molecules, Vol. 29, Pages 1760: Adsorption of Ciprofloxacin on Clay Minerals in Argentinian Santa Rosa-Corrientes Soils

Molecules, Vol. 29, Pages 1760: Adsorption of Ciprofloxacin on Clay Minerals in Argentinian Santa Rosa-Corrientes Soils Molecules doi: 10.3390/molecules29081760 Authors: Nelly L. Jorge María V. Garrafa Jorge M. Romero María J. Jorge Lilian C. Jorge Mario R. Delfino Yumeida V. Meruvia-Rojas Alfonso Hernández-Laguna C. Ignacio Sainz-Díaz 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, an...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research