Study on Effects of Chromium on Heavy Metal Removing Strains
- VernacularTitle:铬对重金属去除菌影响的研究
- Author:
Xian-Yan LU
;
Hua YIN
;
Hui PENG
;
Jin-Shao YE
;
Na ZHANG
;
- Publication Type:Journal Article
- Keywords:
Heavy metal,Chromium,Resistance,Yeast
- From:
Microbiology
1992;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Effects of Cr 6+ concentration and culture time on four heavy metal removing strains,stability of these four strains removing Cr 6+,configuration changes inside or outside their cells,effects of Cr 6+ on soluble reductive sugar inside their cells,and effect of several factors on these strains had been studied,and the Cr 6+ resistance mechanisms of these strains have been discussed elementarily. The results showed that the Lethality of these strains caused by Cr 6+ was similar with one another, namely, increasing at first, then decreasing, and finally increasing again as culture time passed. Acclimatization of Candida sp. was better than Sporobolomycetaceae sp.,and the Cr 6+ resistance of Sporobolomycetaceae sp. 7-3 was the best of the four. The research also demonstrated that the metabolic activity of these strains had been influenced by Cr 6+ in a certain extent. Scanning electron microscopy,transmission electron microscopy,and atomic force microscopy observations approved that removal of Cr 6+ by Candida sp. was depended on both surface adsorption and intracellular accumulation. Effects of Cr 6+ concentration, pH, culture time, nitrogen source, carbon source and adsorption time on these strains are not the same.
