Kinetics of Chromium Reduction by Mixed Cultures during Growth Phase

• Published in: Water environment research Vol. 72; no. 5; pp. 523 - 529
• Main Authors: Schmieman, Eric A., Yonge, David R., Petersen, James N., Rege, Mahesh A., Apel, William A.
• Format: Journal Article
• Language: English
• Published: Alexandria, VA Water Environment Federation 01-09-2000; Blackwell Publishing Ltd
• Subjects: Applied sciences; Bacteria; Biodegradation of pollutants; Biological and medical sciences; BIOLOGICAL KINETICS; Biomass; BIOREMEDIATION; Biotechnology; CHROMATE REDUCTION; Chromium; Cultural values; Decontamination. Miscellaneous; Earth sciences; Earth, ocean, space; Electrons; Engineering and environment geology. Geothermics; Environment and pollution; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; GROUNDWATER; Groundwaters; IN SITU; Industrial applications and implications. Economical aspects; Kinetics; METAL; Microorganisms; Natural water pollution; Nitrates; Nitrites; Null hypothesis; Pollution; Pollution, environment geology; Research Papers; SOIL; Soil and sediments pollution; Soil water; Water treatment and pollution; Biodegradation; Growth; Mixed microorganism culture; Experimental study; Soil pollution; Heavy metal; Chemical reduction; Decontamination; Water pollution; Bioremediation; Kinetics; Chromium VI; Ground water
• ISSN: 1061-4303; 1554-7531
• DOI: 10.2175/106143000X138094

Hexavalent chromium reduction kinetic parameters were estimated for several mixed cultures using molasses as the carbon source and nitrate as the terminal electron acceptor. Mixed cultures were enriched from diverse environmental sources, and kinetic parameter comparisons are made between the consortia and a pure culture grown under the same conditions. A statistical analysis of the results indicated that some kinetic parameters exhibited significant differences, whereas others did not. It should be noted that those parameters with statistically significant differences were nonetheless numerically similar. Conservative values, therefore, could be assumed, or site-specific data obtained, for those parameters to design in situ bioremediation of chromium-contaminated sites.