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Bioremediation process of Cd2+ removal from soil by bacteria a biomineralization

Cheng, L., Qian, C., Wang, R. and Wang, J. (2008) Bioremediation process of Cd2+ removal from soil by bacteria a biomineralization. Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society, 36 (SUPPL). pp. 215-221.


The behavior of biomineralization of bacteria A in the presence of Cd2+ and the effect of Cd2+ polluted soil repaired by bacteria A were investigated. The results show that while the bacteria A had a high urease constant Km of 1.231 mol/L and the Cd2+ concentration was 0.595 mg/L, the bacteria grew well. The growth of bacteria changed from accelerated to restrained with the increase of Cd2+ concentration. Bacteria A have high urease activity in Cd2+ polluted solution and soil. Free Cd2+ ions can react with CO3 2- induced by bacteria urease to form insoluble CdCO3 crystals. By pot experiment, the Cd2+ content in soil and Cd2+ concentration in wheat can be efficiently reduced after the polluted soil was recovered by bacteria A culture medium. The extensive prospect of applying bacteria A to soil and water remediation has been shown.

Item Type: Journal Article
Publisher: Chinese Ceramic Society
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