Abstract
Selenium is toxic to aquatic life at very low levels and can also be harmful to human health. Anthropogenic sources of selenium are wide spread including electronic and photography, glass manufacturing, pigments, additives for metal processing, copper refining operations, fossil fuel combustion, petroleum refining, and agricultural drainage waters in the Western United States. This study investigates selenium removal by microbial reduction with a pure culture of selenium-reducing bacterium Escherichia coli strain EWB32213 isolated in our laboratory from a coal slurry pond. Environmental factors evaluated include temperature, pH, and selenium concentration with optimal conditions observed at pH 7 and 30°C. A two-stage reduction process, from selenate to selenite, followed by selenite to elemental selenium and subsequent precipitation was observed in the batch culture. The reduction of selenite to elemental selenium in the second stage was found to be the rate limiting process with reduction rate significantly lower than that in the first-stage.
Original language | English |
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Title of host publication | World Environmental And Water Resources Congress 2016 |
Subtitle of host publication | Water, Wastewater, and Stormwater and Urban Watershed Symposium - Papers from Sessions of the Proceedings of the 2016 World Environmental and Water Resources Congress |
Editors | Debra Reinhart, Chandra S. Pathak |
Pages | 175-184 |
Number of pages | 10 |
ISBN (Electronic) | 9780784479889 |
DOIs | |
State | Published - 2016 |
Event | 16th World Environmental and Water Resources Congress 2016: Water, Wastewater, and Stormwater and Urban Watershed Symposium - West Palm Beach, United States Duration: May 22 2016 → May 26 2016 |
Publication series
Name | World Environmental And Water Resources Congress 2016: Water, Wastewater, and Stormwater and Urban Watershed Symposium - Papers from Sessions of the Proceedings of the 2016 World Environmental and Water Resources Congress |
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Conference
Conference | 16th World Environmental and Water Resources Congress 2016: Water, Wastewater, and Stormwater and Urban Watershed Symposium |
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Country/Territory | United States |
City | West Palm Beach |
Period | 5/22/16 → 5/26/16 |
Bibliographical note
Publisher Copyright:© ASCE.
ASJC Scopus subject areas
- Environmental Engineering
- Water Science and Technology