Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 16, Issue 3, 2014; Page No.(611-614)

BACTERIAL RESISTANCE TO ZINC METAL AND THEIR BIOSORPTION MECHANISM

J. JOONU AND HORNE IONA AVERAL

Abstract

In the present study with the intention of screening for heavy metal tolerance, bacteria were isolated and characterized for their resistance to metals. These samples were collected from an effluent and analyzed to assess their heavy metal contamination. The samples were isolated and characterized by the Gram staining, motility tests and biochemical tests. The analytical reports of heavy metals present in the sample were identified. Metal tolerance in all bacteria showed higher sensitivity to Zinc metal which was observed for 48hrs, 72hrs, 96hrs, 120hrs and 148hrs. Results indicate the applicability of the isolated bacteria for the removal of Nickel, Zinc and Copper from the industrial effluent. The bacteria which survived for higher concentrations of heavy metal are Enterococcus species.

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