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Current Microbiology

, Volume 50, Issue 3, pp 145–150 | Cite as

Removing Selenite from Groundwater with an In Situ Biobarrier: Laboratory Studies

  • William J. HunterEmail author
  • L. David Kuykendall
Article
  • 103 Downloads

Abstract

Laboratory biobarriers were evaluated for their ability to remove selenite from flowing groundwater. Microbial activity in aquifers is usually limited by substrate availability, and biobarriers stimulate microbial activity by providing a substrate; for these studies soybean oil was used. Water containing 10 mg L−1 selenite-Se was pumped through the biobarriers for 74 days and the amount present in the effluent monitored. The amounts remained high for the first 2 weeks of the study but then declined. From day 28 until the end of the study the amount of selenite-Se in the column effluents averaged 0.20 ± 0.04 mg L−1, a decrease of approximately 98%. At the end of the study about half of the selenite-Se applied to the columns was recovered as immobilized selenium trapped by the biobarrier. This study suggests that biobarriers containing vegetable oil might be used as a process for removing selenite from contaminated groundwater.

Keywords

Selenium Nitrite Selenite Maximum Contaminant Level Sand Column 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We thank Robin Montenieri and Ryan Vaughn for technical assistance. Reference to manufacturer or product brand name is made for the reader’s convenience and does not reflect endorsement by the US Department of Agriculture. This article was the work of US government employees engaged in their official duties and is exempt from copyright.

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  1. 1.USDA-ARS, NRRCFort CollinsUSA
  2. 2.USDA-ARS, BARC-WBeltsvilleUSA

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