Valence variation of arsenic in bioleaching process of arsenic-bearing gold ore

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	Valence variation of arsenic in bioleaching process of arsenic-bearing gold ore
其他题名	Valence variation of arsenic in bioleaching process of arsenic-bearing gold ore
	Cui Richeng; Yang Hongying; Chen Sen; Zhang Shuo; Li Kefeng
	2010
发表期刊	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN	1003-6326
卷号	20 期号:6 页码:1171-1176
摘要	The concentration and variational trend of As3+ and As5+, the bacterial resistance for the As3+ and As5+ and converting conditions from As3+ to As5+ were analyzed. The additive was used to prompt the bacterial leaching efficiency by changing valence state of arsenic. The results show that the concentration of As3+ is larger than that of As5+ in the lag phase. The concentration of As3+ decreases in the log phase, and is lower than that of As5+. HQ-0211 typed bacteria express better resistance for As3+ and As5+ and remain growing when the concentrations of As3+ and As5+ are above 6.0 g/L and 12.0 g/L, respectively. It is found that Fe3+ cannot oxidize As3+ singly as strong oxidant in the leaching system, but can cooperate with pyrite or chalcopyrite to do that. The oxidation of As3+ is prompted with addition of H2O2. The bacterial activity is improved in favor of bacterial leaching efficiency. NaClO restrains the bacterial growth to depress leaching efficiency because of the chloric compounds affecting bacterial activity.
其他摘要	The concentration and variational trend of As~(3+) and As~(5+), the bacterial resistance for the As~(3+) and As~(5+) and converting conditions from As~(3+) to As~(5+) were analyzed. The additive was used to prompt the bacterial leaching efficiency by changing valence state of arsenic. The results show that the concentration of As~(3+) is larger than that of As~(5+) in the lag phase. The concentration of As~(3+) decreases in the log phase, and is lower than that of As~(5+). HQ-0211 typed bacteria express better resistance for As~(3+) and As~(5+) and remain growing when the concentrations of As~(3+) and As~(5+) are above 6.0 g/L and 12.0 g/L, respectively. It is found that Fe~(3+) cannot oxidize As~(3+) singly as strong oxidant in the leaching system, but can cooperate with pyrite or chalcopyrite to do that. The oxidation of As~(3+) is prompted with addition of H_2O_2. The bacterial activity is improved in favor of bacterial leaching efficiency. NaClO restrains the bacterial growth to depress leaching efficiency because of the chloric compounds affecting bacterial activity.
关键词	As3+ As5+ bacterial leaching arsenic resistance oxidant arsenic-bearing gold ore
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [National High-tech Research and Development Program of China] ; [Specialized Research Fund for the Doctoral Program of Higher Education, China]
CSCD记录号	CSCD:3920442
引用统计	被引频次：8[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/153012
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Cui Richeng,Yang Hongying,Chen Sen,et al. Valence variation of arsenic in bioleaching process of arsenic-bearing gold ore[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2010,20(6):1171-1176.
APA	Cui Richeng,Yang Hongying,Chen Sen,Zhang Shuo,&Li Kefeng.(2010).Valence variation of arsenic in bioleaching process of arsenic-bearing gold ore.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,20(6),1171-1176.
MLA	Cui Richeng,et al."Valence variation of arsenic in bioleaching process of arsenic-bearing gold ore".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 20.6(2010):1171-1176.