Resistance and Adsorption of Several Bacterial Strains to Heavy Metals
- VernacularTitle:几株细菌的重金属抗性水平和吸附量
- Author:
Han-Bo ZHANG
;
Yue ZHENG
;
Fan ZENG
;
Zhi-Ying ZHU
;
Jie WANG
;
- Publication Type:Journal Article
- Keywords:
Lead-zinc mine tailings, Arthrobacter, Agromyces, Heavy metals
- From:
Microbiology
1992;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Six bacterial strains were isolated from lead-zinc mine tailings with the age of about 100 years, and their phylogenetic position was determined by the analysis of partial 16S rRNA gene sequence. Three strains belonged to genus Arthrobacter, and were close to A. nicotinovorans and A. histidinolovorans. Other three strains belonged to genus Agromyces, and were close to Ag. mediolanus. All of them were resistant to Pb(NO_(3))_(2), CdCl_(2), ZnSO_(4), CuSO_(4) and CoCl_2. Relatively, minimal inhibitory concentration(MIC)of Zn~(2+) and Co~(2+) of three Arthrobacter strains was significantly higher than that of three Agromyces strains. Additionally, these strains displayed strong adsorption of Pb(NO_(3))_(2), CdCl_(2), ZnSO_(4). Averagely three Arthrobacter strains could adsorb about 400mg of Pb~(2+), 177mg of Cd~(2+) or 80mg of Zn~(2+) per gram of dried cells. Therefore, these strains were important candidates for application in bioremediation of heavy metal-contaminated environment.
