| Literature DB >> 25038376 |
Paul M Bradley1, Larry B Barber2, Joseph W Duris3, William T Foreman4, Edward T Furlong5, Laura E Hubbard6, Kasey J Hutchinson7, Steffanie H Keefe8, Dana W Kolpin9.
Abstract
Pharmaceutical contamination of shallow groundwater is a substantial concern in effluent-dominated streams, due to high aqueous mobility, designed bioactivity, and effluent-driven hydraulic gradients. In October and December 2012, effluent contributed approximately 99% and 71%, respectively, to downstream flow in Fourmile Creek, Iowa, USA. Strong hydrologic connectivity was observed between surface-water and shallow-groundwater. Carbamazepine, sulfamethoxazole, and immunologically-related compounds were detected in groundwater at greater than 0.02 μg L(-1) at distances up to 6 m from the stream bank. Direct aqueous-injection HPLC-MS/MS revealed 43% and 55% of 110 total pharmaceutical analytes in surface-water samples in October and December, respectively, with 16% and 6%, respectively, detected in groundwater approximately 20 m from the stream bank. The results demonstrate the importance of effluent discharge as a driver of local hydrologic conditions in an effluent-impacted stream and thus as a fundamental control on surface-water to groundwater transport of effluent-derived pharmaceutical contaminants. Published by Elsevier Ltd.Entities:
Keywords: Bank filtration; Groundwater; Hydrologic transport; Pharmaceuticals; Surface water; Wastewater contamination
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Year: 2014 PMID： 25038376 DOI： 10.1016/j.envpol.2014.06.028
Source DB: PubMed Journal: Environ Pollut ISSN： 0269-7491 Impact factor: 8.071