Arsenic,Selenium, and Sulfate Removal using an Ethanol-Enhanced Sulfate-Reducing Bioreactor |
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| Authors: | Qian Luo T K Tsukamoto K L Zamzow G C Miller |
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| Affiliation: | (1) Department of Natural Resources and Environmental Science, MS 199, University of Nevada, Reno, NV 89557, USA;(2) College of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China;(3) Ionic Water Technologies Inc, 333 Flint St, Reno, NV 89501, USA |
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| Abstract: | A laboratory scale sulfate-reducing bioreactor column study was used to investigate removal of arsenic, selenium, and sulfate
in neutral to alkaline simulated mine water. Selenium was effectively removed as insoluble elemental selenium from 200 μg/L
to below the maximum contaminant level (50 μg/L). With the addition of ferrous chloride in the influent, arsenic was also
effectively removed to near the maximum contaminant level (10 μg/L). Sulfate removal was apparently limited by the presence
of undissociated hydrogen sulfide, which was found to limit sulfate-reducing bacterial activity in the range of 20–40 mg/L
and will need to be considered for sulfate-reducing bacteria treatment system designs. |
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| Keywords: | Arsenic Biological treatment Remediation Selenium Sulfate-reducing bioreactor Sulfide toxicity |
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