Effects of Tween-80 and sodium isobutyl-xanthate on the growth and sulfur-oxidizing activities of Acidithiobacillus albertensis BY-05

Cheng-Gui Zhang; Jin-Lan Xia; Rui-Yong Zhang; Peng Anan; Nie Zhenyuan; Qiu Guanzhou

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Effects of Tween-80 and sodium isobutyl-xanthate on the growth and sulfur-oxidizing activities of Acidithiobacillus albertensis BY-05

Cheng-Gui Zhang,Jin-Lan Xia,Rui-Yong Zhang * #,Peng Anan,Nie Zhenyuan,Qiu Guanzhou

School of Resources Processing and Bioengineering, Central South University

*Correspondence author

#Submitted by

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Funding: 国家重大基础研究项目“973”,国家自然科学基金（No.2004CB619201,50674101）

Opened online:29 March 2007

Accepted by: none

Citation: Cheng-Gui Zhang,Jin-Lan Xia,Rui-Yong Zhang.Effects of Tween-80 and sodium isobutyl-xanthate on the growth and sulfur-oxidizing activities of Acidithiobacillus albertensis BY-05[OL]. [29 March 2007] http://en.paper.edu.cn/en_releasepaper/content/11774

This paper presents the effects of two typical surfactants Tween-80 and sodium isobutyl-xanthate (NaIBX) with different concentrations on the growth and sulfur-oxidizing activities of a new strain Acidtithiobacillus albertensis BY-05, one of acidophilic sulfur-oxidizing bacteria. The results indicated that (1) both these two surfactants can enhance the growth and sulfur-oxidizing activities of A. albertensis BY-05 in only some limited concentrations, e.g., 10^-4～10^-8g/L for NaIBX and lower than 10^-8g/L for Tween-80, but inhibit and are even harmful at higher concentrations; (2) both these two surfactants can not be metabolized by A. albertensis BY-05; and (3) The contact between the bacterial cells and the sulfur particles may be dependent upon both the extracellular substance and the surfactants, both of which provide the amiphiphilic environment that leads to the improvement of attachment of the bacteria to the sulfur particles surfaces. These data could be significant for enhancing the applications of both A. albertensis BY-05 and some typical surfactants to industrial bioleaching of sulfides minerals.

Keywords:Acidithiobacillus albertensis BY-05; Surfactants; Growth activity; Sulfur-oxidizing activity

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