Influence and Mechanism of Cu2+ on Removal of U(VI) by Sulfate Reducing Bacteria

Yue Lin Liu; Shui Bo Xie; Hui Ling; Wen Tao Wang; Shi You Li; Ying Jiu Liu

doi:10.4028/www.scientific.net/AMR.236-238.903

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 236-238Influence and Mechanism of Cu2+ on Removal of...

Influence and Mechanism of Cu²⁺ on Removal of U(VI) by Sulfate Reducing Bacteria

Abstract:

In order to research on the inhibition of Cu²⁺ to removal of U(Ⅵ) by sulfate reducing bacteria(SRB), the experiment investigated the removal of U(Ⅵ) by SRB through H₂S reduction process, elecrton transfer process and adsorption process respectively. The results showed that the electron transfer was the main process in removing of U(Ⅵ) by SRB, It accounted for 80% of the total removal. Extracellular polymeric substances (EPS) adsorption of U(Ⅵ) had little effect. When the concentration of Cu²⁺ was 5mg/L, Cu²⁺ had little effect on the removal U(Ⅵ) by SRB; It inhibited the removal of U(Ⅵ) significantly when the concentration was 15mg/L because of the competition of H₂S and the electronics of lactic acid between Cu²⁺ and U(Ⅵ); When the concentration of Cu²⁺ exceeded 25mg/L, it would damage the integrity of SRB’s membrane and the removal of U(Ⅵ) was completely inhibited.

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Periodical:

Advanced Materials Research (Volumes 236-238)

Pages:

903-908

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.236-238.903

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Online since:

May 2011

Authors:

Yue Lin Liu, Shui Bo Xie, Hui Ling, Wen Tao Wang, Shi You Li, Ying Jiu Liu

Keywords:

Cu²⁺, Inhibition Mechanism, Sulfate-Reducing Bacteria (SRB), Uranium

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