title: [Effect of simulated heavy metal leaching solution of electroplating sludge on the bioactivity of Acidithiobacillus ferrooxidans].
abstract: An Acidithiobacillus ferrooxidans strain WZ-1 was isolated from the tannery sludge in Wenzhou, Zhejiang Province in China. The cell of WZ-1 strain is Gram negative and rod-shaped, its 16S rDNA sequence is closely related to that of Acidithiobacillus ferrooxidans ATCC23270 with 99% similarity. These results reveal that WZ-1 is a strain of Acidithiobacillus ferrooxidans. The effects of Ni2+, Cr3+, Cu2+, Zn2+ and 5 kinds of simulated leaching solutions of electroplating sludge on the bioactivity of Fe2+ oxidation and apparent respiratory rate of WZ-1 were investigated. The results showed that Ni2+ and Cr3+ did not have any influence on the bioactivity of WZ-1 at concentrations of 5.0 g x L(-1) and 0.1 g x L(-1), respectively. WZ-1 showed tolerance to high levels of Ni2+, Zn2+ (about 30.0 g x L(-1)), but it had lower tolerance to Cr3+ and Cu2+ (0.1 g x L(-1) Cr3+ and 2.5 g x L(-1) Cu2+). Different kinds of simulated leaching solution of electroplating sludge had significant differences in terms of their effects on the bioactivity of WZ-1 with a sequence of Cu/Ni/Cr/Zn > Cu/Ni/Zn > Cu/Cr/Zn > Cu/Ni/Cr > Ni/Cr/Zn.
authors.affiliation: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China. xxyuan1010@126.com
authors.forename: Xin-Yuan
authors.initials: XY
authors.lastname: Xie
authors.forename: Pei-De
authors.initials: PD
authors.lastname: Sun
authors.forename: Ju-Qing
authors.initials: JQ
authors.lastname: Lou
authors.forename: Mao-Xin
authors.initials: MX
authors.lastname: Guo
authors.forename: Wang-Gang
authors.initials: WG
authors.lastname: Ma
mesh_terms: D042763:Acidithiobacillus / Q000187:drug effects*; D003198:Computer Simulation; D004595:Electroplating; D007220:Industrial Waste / Q000032:analysis*; D019216:Metals, Heavy / Q000302:isolation & purification* / Q000494:pharmacology; D012722:Sewage / Q000382:microbiology
chemical_list: D007220:Industrial Waste; D019216:Metals, Heavy; D012722:Sewage