Journal
WATER RESEARCH
Volume 46, Issue 17, Pages 5472-5482Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2012.07.013
Keywords
Column experiments; Geosorbents; beta-Blocker; Sorption; K-OC; Cation exchange; Competition
Funding
- Energie Baden-Wurttemberg (EnBW, Karlsruhe)
- German Ministry for Environment, Nature Conservation and Nuclear Safety (BMU) [0325111B]
- German Federal Ministry of Education and Research [02WRS1277A]
Ask authors/readers for more resources
The influence of cation exchange processes on the transport behavior of the cationic beta-blockers atenolol and metoprolol was investigated by applying saturated laboratory column experiments. Breakthrough curves using natural sediments under different competitive conditions were generated and resulting sorption coefficients were compared. For the cationic species of atenolol (at pH = 8), the existence and dominating role of cation exchange processes were demonstrated by varying calcium concentrations. No effect of atenolol concentration on its retardation was observed within a wide concentration range. The breakthrough curve comparison of atenolol and the more hydrophobic metoprolol under constant conditions showed a significantly stronger retardation for metoprolol than for atenolol. However, additional non-polar interactions cannot explain the observed differences as they are determined to be negligible for both compounds. Due to the dominating role of cation exchange processes for the cationic species on overall sorption, a simple prediction of beta-blocker transport in the subsurface by using K-OC values derived from log K-OW-log K-OC correlations is not feasible. (C) 2012 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available