期刊论文

Influence of coexistent metal ions on reduction of U( Ⅵ) by Shewanella oneidensis with Fe~0

Xie, S.

中文

环境工程学报

1673-9108

2016

10

9

5269-5274

10.12030/j.cjee.201504138

11175081:国家自然科学基金 11475080:国家自然科学基金 13JJ3078:湖南省自然科学基金 14K083:湖南省高等学校创新平台开放基金

本校为第一且通讯机构

研究Fe~0-奥奈达希瓦氏菌( Shewanella oneidensis,S. oneidensis) ( MR-1)协同还原去除水相中的U( Ⅵ)时,共存金属离子Cu~(2+)、Ca~(2+)、Mn~(2+)和Zn~(2+)存在时分别对U( Ⅵ)还原效果的影响。结果表明:在10. 0 ~ 50. 0 mg·L~(-1)范围内,共存 Ca~(2+)和Zn~(2+)对U( Ⅵ)的还原有一定的抑制,且影响大小与其浓度呈正相关,共存Cu~(2+)几乎完全抑制了U( VI)的还原;在 Cu~(2+)浓度低于5. 0 mg·L~(-1)时,其对U( VI)的还原存在一定程度的抑制。在Fe~0- S. oneidensis还原U( Ⅵ)的初期, 10. 0 ~ 50. 0 mg·L~(-1)的Mn~(2+)对U( Ⅵ)的还原有抑制作用, 18 h后,Mn~(2+)对U( Ⅵ)的还原基本没有影响,且高浓...

Microbial reduction technology using Shewanella oneidensis with Fe~0 was employed to treat U( Ⅵ) in wastewater. Anaerobic experiments were conducted to evaluate the influence of the coexistent metal ions,such as Cu~(2+) ,Ca~(2+) ,Mn~(2+) ,and Zn~(2+) ,on the reductive removal rate of U( Ⅵ) . The results demonstrated that the reduction of U( Ⅵ) was significantly inhibited when the concentration of Cu~(2+) was 10. 0 to 50. 0 mg· L~(-1) . When the concentration of Cu~(2+) ions was less than 5. 0 mg·L~(-1),the reduction of U( Ⅵ) was only slig...