Back to Search
Start Over
Point sources of emerging contaminants along the Colorado River Basin: Source water for the arid Southwestern United States
- Source :
- Science of The Total Environment. 430:237-245
- Publication Year :
- 2012
- Publisher :
- Elsevier BV, 2012.
-
Abstract
- article i nfo Emerging contaminants (ECs) (e.g., pharmaceuticals, illicit drugs, personal care products) have been detected in waters across the United States. The objective of this study was to evaluate point sources of ECs along the Colorado River, from the headwaters in Colorado to the Gulf of California. At selected locations in the Colorado River Basin (sites in Colorado, Utah, Nevada, Arizona, and California), waste stream tributaries and receiving surface waters were sampled using either grab sampling or polar organic chemical integrative samplers (POCIS). The grab sam- ples were extracted using solid-phase cartridge extraction (SPE), and the POCIS sorbents were transferred into empty SPEs and eluted with methanol. All extracts were prepared for, and analyzed by, liquid chromatography- electrospray-ion trap mass spectrometry (LC-ESI-ITMS). Log DOW values were calculated for all ECs in the study and compared to the empirical data collected. POCIS extracts were screened for the presence of estrogenic chemi- cals using the yeast estrogen screen (YES) assay. Extracts from the 2008 POCIS deployment in the Las Vegas Wash showed the second highest estrogenicity response.In the grab samples, azithromycin (an antibiotic) was detected in all but one urban waste stream, with concentrations ranging from 30 ng/L to 2800 ng/L. Concentration levels of azithromycin, methamphetamine and pseudoephedrine showed temporal variation from the Tucson WWTP. Those ECs that were detected in the main surface water channels (those that are diverted for urban use and irriga- tion along the Colorado River) were in the region of the limit-of-detection (e.g.,10 ng/L), but most were below de- tection limits. Published by Elsevier B.V.
- Subjects :
- Spectrometry, Mass, Electrospray Ionization
Empirical data
Environmental Engineering
Drainage basin
Saccharomyces cerevisiae
Rivers
Source water
Tributary
Environmental monitoring
Southwestern United States
Environmental Chemistry
Waste Management and Disposal
Hydrology
geography
geography.geographical_feature_category
Illicit Drugs
Solid Phase Extraction
Contamination
Pollution
Arid
Pharmaceutical Preparations
Environmental science
Seasons
Surface water
Water Pollutants, Chemical
Chromatography, Liquid
Environmental Monitoring
Subjects
Details
- ISSN :
- 00489697
- Volume :
- 430
- Database :
- OpenAIRE
- Journal :
- Science of The Total Environment
- Accession number :
- edsair.doi.dedup.....a23f851212daba426d35b0d86c44d151