Skip to main content
SLU publication database (SLUpub)

Abstract

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, K-F (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 K-F value for n = 1 was 1838 cm(3) g(-1)) followed by fexofenadine (K-F = 35.1 cm(3/n) mu g(1-1/n) g(-1) n = 1.19) and irbesartan (K-F = 3.96 cm(3/n) mu g(1-1/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 K-F values for different compounds (R-JRB,R-FEX = 0395, p-value

Keywords

Pharmaceuticals; Sorption; Soils; Cationic; Anionic; Zwitter-ionic and neutral molecules; Pedotransfer rules

Published in

Chemosphere
2018, volume: 195, pages: 615-623

SLU Authors

UKÄ Subject classification

Environmental Sciences

Publication identifier

  • DOI: https://doi.org/10.1016/j.chemosphere.2017.12.098

Permanent link to this page (URI)

https://res.slu.se/id/publ/102220