岩石矿物学杂志2009，Vol.28Issue(6)：520-526,7.
Cr(Ⅵ)抗性菌株的筛选及其Cr(Ⅵ)去除特性研究
Isolation and characterization of bacteria with chromium (Ⅵ) removal capacity from chromium-contaminated tannery sludge
摘要
Abstract
Bacteria strains with Cr(Ⅵ) tolerant capacity were isolated from chromium-contaminated tannery sludge and the Cr (Ⅵ) removal characteristics of these isolates were studied. Twenty strains with the Cr (Ⅵ) removal efficiency greater than 50% under the condition of 50 mg/L Cr(Ⅵ) were obtained. These strains were closely related to species in the genera Acinetobacter; Microbacteri-um, Leucobacter, Ochrobactrum and Brachymonas by their 16S rRNA gene sequences. The effects of growth phase, pH and Cr (Ⅵ) concentration on the Cr (Ⅵ) reducing capacity for seven isolates were investigated. Cells with high activity showed higher Cr (Ⅵ) removal efficiency. pH affected the Cr (Ⅵ) removal capacity of these strains remarkably. The Cr (Ⅵ) removal efficiencies of strain No.16 and No.21, closely related to the species in the genus Microbacterium, were over 80% at the pH of 7-8 under the condition of 50 mg/L of Cr (Ⅵ). High concentration of Cr (Ⅵ) repressed the Cr (Ⅵ) removal capacity. However, strain No. 21 showed a removal efficiency of about 80% when the initial Cr (Ⅵ) concentration was 110 mg/L.关键词
铬污染/铬抗性菌株/Cr(Ⅵ)去除细菌/微生物分离Key words
chromium pollution/ Cr(Ⅵ) resistant bacteria/ Cr(Ⅵ) removal bacteria/ microorganism isolation分类
生物科学引用本文复制引用
吴淼,汤岳琴,于萍,周元祥,吴晓磊..Cr(Ⅵ)抗性菌株的筛选及其Cr(Ⅵ)去除特性研究[J].岩石矿物学杂志,2009,28(6):520-526,7.基金项目
国家重点基础研究发展计划(973计划)资助项目(2007CB815601) （973计划）
