Bioreduction of selenate and selenite.
Adams-DJ; Altringer-PB; Gould-WD
Biohydrometallurgical technologies: fossil energy materials, bioremediation, microbial physiology: Proceedings of an International Biohydrometallurgy Symposium, August 22-25, 1993, Jackson Hole, Wyoming, USA. Torma AE, Apel ML, Brierley CL, eds. Warrendale, PA: Minerals, Metals and Materials Society, 1993 Sep; 2:755-771
The U.S. Bureau of Mines, Salt Lake City Research Center and CANMET, Department of Energy, Mines, and Resources, Ottawa, Ontario, Canada, are cooperating on research investigating the biological removal of selenate and selenite from process wastewaters. Bacterial isolates, obtained from agricultural (Alcaligenes xylosoxydans) and mining wastes (Hydrogenophaga pseudoflava), reduce both selenate and selenite ions in mining wastewaters. Selenium reduction has been observed under both aerobic and microaerophilic conditions. Eighty-three to ninety-seven percent selenium removal from wastewaters, containing 0.6 to 30 ppm selenium, has been attained using these bacteria in trickling-column and stirred-tank bioreactors. In laboratory tests, rapid selenate and selenite reductions were obtained with Pseudomonas stutzeri and Escherichia coli. In other tests with P. stutzeri, both selenate and selenite reduction were unaffected by a number of other anions present. An exception was the inhibition of both growth and selenite reduction by the sulfite ion.
Waste treatment; Mining industry; Metals; Bacteria
Salt Lake City Research Center, U.S. Bureau of Mines U.S. Department of the Interior, Salt Lake City, UT, USA
Torma-AE; Apel-ML; Brierley-CL
Biohydrometallurgical technologies: fossil energy materials, bioremediation, microbial physiology: Proceedings of an International Biohydrometallurgy Symposium, August 22-25, 1993, Jackson Hole, Wyoming, USA