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Selenium, selected inorganic elements, and organochlorine pesticides in bottom material and biota from the Colorado River delta

Journal of Arid Environments

By:
, , , , , and
https://doi.org/10.1006/jare.2001.0836

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Abstract

Concentrations of selenium (Se) in bottom material ranged from 0.6 to 5.0 μg g−1, and from 0.5 to 18.3 μg g−1in biota; 23% of samples exceeded the toxic threshold. Concentrations of DDE in biota exceeded the toxic threshold in 30% of the samples. Greater concentrations of selenium in biota were found at sites with strongly reducing conditions, no output, alternating periods of drying and flooding or dredging activities, and at sites that received water directly from the Colorado River. The smallest Se concentrations in biota were found at sites where an outflow and exposure or physical disturbance of the bottom material were uncommon.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Selenium, selected inorganic elements, and organochlorine pesticides in bottom material and biota from the Colorado River delta
Series title:
Journal of Arid Environments
DOI:
10.1006/jare.2001.0836
Volume:
49
Issue:
1
Year Published:
2001
Language:
English
Publisher:
Elsevier
Contributing office(s):
Columbia Environmental Research Center
Description:
25 p.
First page:
65
Last page:
89