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Asian Journal of Biological Sciences

Year: 2019  |  Volume: 12  |  Issue: 4  |  Page No.: 869 - 876

Biosorption of Zinc from Aqueous Solution by the Bacterial Strain, Morganella morganii ACZ05

Duraisamy Ramya and Antony Joseph Thatheyus

Abstract

Background and Objective: Many industries discharge their effluents in to the environment without treatment. Heavy metals present in these effluents cause damage to organisms present in polluted habitats. Microorganisms play an important role in bioremediation of heavy metal polluted soil and wastewater. This study is focused on studying removal of zinc from aqueous solution by bacterial biosorbent. Methodology: Bacterial strain was isolated from electroplating industrial effluent contaminated soil. The isolate was identified by biochemical tests and 16S rRNA sequencing analysis. Various parameters which influence metal removal like pH, biomass and percent removal were investigated. Results: Isolated bacterial strain was identified as Morganella morganii ACZ05. It was exposed to 250, 500, 750 and 1000 ppm concentrations of zinc for 4 days and pH, biomass and percent removal of zinc were observed. Maximum zinc removal was found at 500 ppm concentration on fourth day. The pH, biomass and percent removal were found increased. The highest biosorption capacity (72.6%) was observed at pH 6.8-7.8. The results indicated that M. morganii ACZ05 can be an attractive choice for the removal of zinc. Conclusion: Compared to other biosorbents reported in the literature, the M. morganii ACZ05 tested in this study showed very good promise for practical applicability.

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