Biological reduction of hexavalent chromium and mechanism analysis of detoxification by enterobacter sp. HT1 isolated from tannery effluents, Mongolia
Keywords:Indigenous Bacteria, Hexavalent chromium, Wastewater, Tannery industry
Enterobacter sp. HT1, Cr (VI) resistant bacterial strain was isolated from the wastewater sample of the tannery in Mongolia. Batch experiments on hexavalent chromium removal was carried out at 10, 20, and 30 mg/L of Cr (VI) added as potassium dichromate (K2Cr2O7), at pH 7 and temperature of 30 °C using pure culture of Enterobacter sp. HT1 as inoculum. The isolated HT1 is capable of reduction nearly 100% of Cr (VI) resulting in the decrease of Cr (VI) from 10 to 0.2 mg/L within 20 hours. When the concentration of Cr (VI) increased to 20 and 30mg/L, almost complete reduction of Cr (VI) could achieve after 72 and 96 hours, respectively.
Mongolian Journal of Chemistry 15 (41), 2014, p47-52
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