Bioremoval of cadmium by growing deepsea bacteri

Authors: Weizhi Zhou Hai’ou Zhang Yuhong Ma Jianpeng Zhou Yuzhong Zhang

Publish Date: 2013/06/28

Volume: 17, Issue: 5, Pages: 723-731

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Abstract

Effective bioremoval of heavy metals is important for water treatment Although a number of microorganism species demonstrated the ability of living cells to remove cadmium most of them were tested at fixed concentration of metals salinity and temperature This paper reported a research on the screening and performance of a newly developed deepsea bacterium Pseudoalteromonas sp SCSE7096 for CdII removal by growing cells under a range of experimental conditions 0–50 mg/L of CdII 15–30 °C of incubation temperatures 65–80 of initial pH and 15–50  of salinity Study results revealed that Pseudoalteromonas sp SCSE7096 could remove more than 96  of CdII on growth The CdII bioremoval was in correlation but not in accordance with biomass As cadmium concentrations increased the CdII removal by cell adsorption played an increasingly important role compared with that of intracellular accumulation For the removal mechanism Fourier transform infrared spectroscopy revealed that carboxyl amido and hydroxyl of saccharides and proteins in the extracellular polymeric substances are the most active groups for CdII absorption The bacterium reported in this study offers a new microbe strain for CdII bioremediation

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