Coupled Reduction and Removal of Heavy Metals by a Mixed Microbial Ecosystem
Contamination of surface water by conglomerate mixtures of metals is a significant health problem in aquatic environments near mining and metal (tannery) processing operations. Metals, such as hexavalent chromium (CrVI), manganese (Mn), lead (Pb), selenium (Se), and zinc (Zn) have been shown to occur at elevated levels in many near-shore environments (Capone et al., 1983). In situ bioremediation of these metals has been suggested as a mechanism to alleviate the presence of these contaminants. In this regard, our laboratory has examined the bioremediation and removal of various individual heavy metals from soil and water, in simulated ponds using a mixed microbial ecosystem. In these experiments 80–90% of the metals examined were reduced and recovered from both soil and water in the biomass formed on the pond surface (Ibeanusi et al., 1989; Archibold et al., 1989; Bender et al, 1987).
KeywordsMicrobial Biomass Hexavalent Chromium Elemental Selenium Pond Surface Couple Reduction
Unable to display preview. Download preview PDF.
- Archibold, E.R., Ibeanusi, V.M., Bender, J.A., and Gould, J.P. (1989). Use of a mixed microbial system in the removal of lead from contaminated water. In: Biodeterioration Research 2, pp 161–174 ( C. O’Rear and Llewellyn, ed.), Plunum Press, N.Y.Google Scholar
- Capone, D.G., Reese, D., and Kiene, R. (1983). Effects of meta Ison methanogenesis, sulfate reduction, carbon dioxide evolution, and microbial biomass in anoxic salt marsh sediments. Appl. Environ. Microbiol., 45, 1586–1591.Google Scholar
- Doran, J., and Alexander, M. (1977). Microbial transformations of selenium. ADDI. Environ. Microbiol., 33, 31–37.Google Scholar
- Ibeanusi, V., and Archibold, E., Bender, J, and Gould, J. (1989). Mechanisms of mixed microbial mobilization and recovery of heavy metals in a simulated pond system. Abst. 89th Annu Meeting. Am. Soc. Microbiol., 89, 362.Google Scholar