Chromium-tolerant bacteria isolated from industrial effluents and their use in detoxication of hexavalent chromium

• Published in: Folia microbiologica Vol. 44; no. 1; pp. 50 - 54
• Main Authors: SHAKOORI, A. R, TAHSEEN, S, HAQ, R. U
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Praha Academia 01.01.1999; Springer Nature B.V
• Subjects: Action of physical and chemical agents on bacteria; Bacteria; Bacteriology; Biodegradation of pollutants; Biodegradation, Environmental; Biological and medical sciences; Biotechnology; Cadmium; Cadmium - metabolism; Chromium; Chromium - metabolism; Effluents; Environment and pollution; Environmental cleanup; Fundamental and applied biological sciences. Psychology; Gram-Negative Bacteria - growth & development; Gram-Negative Bacteria - isolation & purification; Gram-Negative Bacteria - metabolism; Gram-Positive Cocci - growth & development; Gram-Positive Cocci - isolation & purification; Gram-Positive Cocci - metabolism; Heavy metals; Hexavalent chromium; Hydrogen-Ion Concentration; Industrial applications and implications. Economical aspects; Industrial effluents; Industrial Microbiology; Industrial wastes; Industrial wastewater; Lead; Lead - metabolism; Leather; Metal concentrations; Microbiology; pH effects; Steel; Strains (organisms); Temperature; Temperature effects; Time Factors; Pollutant; Reduction; Tolerance; Bacteria; Detoxication; Bioremediation; In vitro; Biological activity; Chromium VI; Heavy metal
• ISSN: 0015-5632; 1874-9356
• DOI: 10.1007/BF02816221

Three bacterial strains were isolated from effluents of leather (CMBL Cr13, CMBL Cr14) and steel (CMBL Cr15) industries for their possible use in chromium(VI) detoxication of industrial waste. CMBL Cr13 was found to tolerate chromium(VI) up to a concentration of 45 g/L in the medium, while CMBL Cr14 and CMBL Cr15 could tolerate up to 40 g/L. These bacteria were also checked for resistance to other metals. They resisted a lead concentration of 1 g/L and cadmium concentration of 550 mg/L in the medium. They showed optimum growth at pH 7.3-7.5 at a temperature of 35-37 degrees C. CrVI-reducing ability of the three strains ranged from 70 to 80% after 3 d of incubation. The possible use of these bacteria in environmental cleanup is discussed.