Sorption of citalopram, irbesartan and fexofenadine in soils: Estimation of sorption coefficients from soil properties

The sorption of 3 pharmaceuticals, which may exist in 4 different forms depending on the solution pH (irbesartan in cationic, neutral and anionic, fexofenadine in cationic, zwitter-ionic and anionic, and citalopram cationic and neutral), in seven different soils was studied. The measured sorption is...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2018-03, Vol.195, p.615-623
Main Authors: Klement, Aleš, Kodešová, Radka, Bauerová, Martina, Golovko, Oksana, Kočárek, Martin, Fér, Miroslav, Koba, Olga, Nikodem, Antonín, Grabic, Roman
Format: Article
Language:English
Subjects:
Adsorption - physiology
Agriculture
Aluminum Silicates - chemistry
Anionic
Biphenyl Compounds - analysis
Biphenyl Compounds - metabolism
Cationic
Citalopram - analysis
Citalopram - metabolism
Pedotransfer rules
Pharmaceuticals
Soil - chemistry
Soil Pollutants - analysis
Soil Pollutants - metabolism
Soils
Sorption
Terfenadine - analogs & derivatives
Terfenadine - analysis
Terfenadine - metabolism
Tetrazoles - analysis
Tetrazoles - metabolism
Waste Water - analysis
Waste Water - chemistry
Zwitter-ionic and neutral molecules
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Summary:The sorption of 3 pharmaceuticals, which may exist in 4 different forms depending on the solution pH (irbesartan in cationic, neutral and anionic, fexofenadine in cationic, zwitter-ionic and anionic, and citalopram cationic and neutral), in seven different soils was studied. The measured sorption isotherms were described by Freundlich equations, and the sorption coefficients, KF (for the fixed n exponent for each compound), were related to the soil properties to derive relationships for estimating the sorption coefficients from the soil properties (i.e., pedotransfer rules). The largest sorption was obtained for citalopram (average KF value for n = 1 was 1838 cm3 g−1) followed by fexofenadine (KF = 35.1 cm3/n μg1−1/n g−1, n = 1.19) and irbesartan (KF = 3.96 cm3/n μg1−1/n g−1, n = 1.10). The behavior of citalopram (CIT) in soils was different than the behaviors of irbesartan (IRB) and fexofenadine (FEX). Different trends were documented according to the correlation coefficients between the KF values for different compounds (RIRB,FEX = 0.895, p-value
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2017.12.098