【摘要】 研究零价铁（ZVI）与奥奈达希瓦氏菌（S.oneidensis）协同还原去除水相中U（Ⅵ）时,共存离子Cr⁶⁺、Fe³⁺、Cu²⁺、Mn²⁺、Zn²⁺、NO₃^-和SO₄^2-分别存在时对U（Ⅵ）还原效果的影响。结果表明:溶液中共存的Cr⁶⁺和溶解态的Fe³⁺对ZVI与微生物协同还原U（Ⅵ）均存在显著的抑制作用,且当溶液中共存Cr⁶⁺的含量超过10.0 mg/L时,U（Ⅵ）的还原几乎被完全抑制。在共存金属浓度为20 mg/L时,Cu²⁺、Zn²⁺对U（Ⅵ）的还原均具有抑制作用,且Cu²⁺的影响大于Zn²⁺;Mn²⁺对U（Ⅵ）的还原有微弱的促进作用。共存阴离子SO₄^2-对U（Ⅵ）的还原有微弱的促进作用,且作用大小与其浓度成正相关;在0.5⁵.0 mmol/L浓度范围内,12 h时,共存阴离子NO₃^-对U（Ⅵ）的还原有明显的抑制作用。更多还原

【Abstract】 Microbial reduction technology by S. oneidensis with ZVI was employed to treat U（Ⅵ） from wastewater.Anaerobic experiments were conducted to evaluate the influence of coexistent ions such as Cr⁶⁺,Fe³⁺,Cu²⁺,Zn²⁺,NO₃^-and SO₄^2-on the reductive removal rate of U（Ⅵ）. The results demonstrated that coexistence of Cr⁶⁺ and Fe³⁺ showed a remarkable negative effect on U（Ⅵ） reduction,and the reduction of U（Ⅵ） was completely inhibited with the concentration of Cr⁶⁺more than 10.0 mg/L. Coexistence of Cu²⁺and Zn²⁺showed a remarkable negative effect on U（Ⅵ） reduction with the concentration 20.0 mg/L,and Zn²⁺ has less influence on the process,while coexistence of Mn²⁺ of 20.0 mg/L could slightly promote U（Ⅵ）reduction. SO₄^2-has weak promotion,and the effect on the reduction of U（Ⅵ） is positive correlated with its concentration. When the concentration of NO₃^-was in the range of 0.5⁵.0 mmol/L,it could cause seriously inhibition on the reduction of U（Ⅵ）at 12 h.更多还原