期刊论文

EXPERIMENTAL STUDY ON INTERACTION OF PSEUDOMONAS CEPACIA AND U(Ⅵ)

中文

环境工程

1000-8942

2019

37

8

27-31,106

10.13205/j.hjgc.201908005

11475080:国家自然科学基金 CX2018B606:湖南省研究生科研创新项目

本校为第一机构

利用土著洋葱假单胞菌进行试验,探讨了其对低浓度含铀废水处理的性能。结果表明: ρ[U(Ⅵ)]为10 mg/L, pH为6.0,温度为30 ℃时,菌体对U(Ⅵ)的最大平衡吸附量可达到160.4 mg/g。重金属离子(Cu~(2+)、Pb~(2+)、Zn~(2+)等)对U(Ⅵ)去除存在较大影响。重金属离子浓度为100 mg/L时,Cu~(2+)、Pb~(2+)对菌体去除U(Ⅵ)有明显的抑制作用,而Zn~(2+)的影响微弱。采用SEM-EDX、XRD、FTIR表征分析,阐明铀-细菌相互作用的反应机理。结果表明: U(Ⅵ)以絮状磷酸铀化合物沉积在细胞表面,羟基、羧基和磷酸盐基团促进了U(Ⅵ)的生物沉积。土著洋葱假单胞菌可以耐受U(Ⅵ)和其他重金属毒性,可与U(Ⅵ)发生矿化反应,可在低...

Treatment of low-concentration uranium-containing wastewater was tested by indigenous Pseudomonas cepacia for its performance. The results showed that the maximum equilibrium adsorption capacity of U(Ⅵ) was 160.4 mg/g in U(Ⅵ) solution of 10 mg/L,pH 6.0,and 30 ℃. The removal of U(Ⅵ) was greatly affected by the existence of heavy metal ions (Cu~(2+),Pb~(2+),Zn~(2+),etc.). The removal of U(Ⅵ) was obviously inhibited by Cu~(2+) and Pb~(2+),while the effect of Zn~(2+) was weak,with the heavy metal ions'concentration of 100 mg/L. The reaction me...