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杨洪英, YANG Hong-ying, GONG En-pu, YANG Li-li, WANG Da-wen
Trans. Nonferrous Met. Soc. China Jun. 2005 Vol. 15 No.3,-0001,():
-1年11月30日
The study on arsenopyrite and realgar of bacterial oxidation shows that the chemical behaviors of differ-ent arsenic-bearing sulphides oxidated by thermophilic bacteria are quite distinct. Arsenopyrite is active and quickly eroded in bacteria-bearing solution. With a high leaching rate over 95%, the arsenopyrite phase cannot be detected by X-ray diff raction (XRD). Arsenopyrite is highly toxic to bacteria that at the initial stage of bio2oxidation, bacteri-al growth is inhibited and the number of bacterium cell drops from 2.26
thermophilic bacteria, bacterial oxidation, chemical behavior, arsenopyrite, realgar, toxicity
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杨洪英, Yang Hong-Ying, Yang Li, Fan You-Jing, Chen Gang, Zhao Yu-Shan, Lu Jiu-Ji
贵金属,2003,24(4):32~35,-0001,():
-1年11月30日
研究了广西某难处理金精矿的化学成分、矿物成分、粒度分布和金的赋存状态。研究表明金的品位为144g/t,银的品位为35g/t,砷含量为2215%。金、银含量在各粒级中分布不均匀,不同粒级金、银品位不同,在<74μm粒级中金的品位最高达154.0g/t,银的品位为45g/t,砷为2416%。金的载体矿物主要是毒砂,其次是黄铁矿,金以超微细粒和次显微金包裹于毒砂和黄铁矿中。
难处理金矿, 金赋存状态, 载金矿物, 毒砂, 黄铁矿
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杨洪英, YANG Hong-ying, YANGLi, ZHAO Yu-shan, CHEN Gang, LU Jiu-ji, FAN You-jing
Trans. Nonferrous Met. Soc. China Dec.2002 Vol. 12 No.6,-0001,():
-1年11月30日
Through the study by electronic probe it was found that many new cracks and holes appear on the surface of gold-bearing arsenopyrite crystal oxidized by Thiobacillus ferrooxidans, which are along with some directions. Then the selective bio-oxidation model of gold-bearing arsenopyrite was set up. The selective bio-oxidation resulting from the submicro-battery effect of gold/arsenopyrite mineral pairs naturally forms in the gold-bearing arsenopyrite crystal. Thiobacillus ferrooxidans has priority to oxidize the place of gold-rich and oxidizes selectedly along with the crystal border, crystal face and crack. The bacteria oxida-tion process of gold-bearing arsenopyrite is divided into three stages: the first stage is the surface oxidation, the second stage is restraining oxidation and the third stage is the filament oxidation, bacteria oxidize along with cracks of arsenopyrite.
selective bio-oxidation model, submicro-battery effect, gold-bearing arsenopyrite, Thiobacillus ferrooxidans
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杨洪英, YANG Hong-ying, YANG Li, WEI Xu-jun
中国有色金属学报,2001,11(2):323~327,-0001,():
-1年11月30日
采用优良的氧化亚铁硫杆菌SH2T菌株对含金毒砂抛光片和纯毒砂粉末进行氧化试验, 并作了定时定域的显微观察分析,研究了每一阶段毒砂表面的性质和毒砂氧化膜的形成过程。毒砂在细菌氧化后覆盖了黄色氧化膜,抑制了细菌的快速氧化。用X射线粉晶衍射法对细菌氧化产物进行物相分析,结果表明氧化物的主要成分为黄钾铁矾,其次为砷华。细菌氧化膜的X射线光电子谱分析表明毒砂晶体中As表现出[AsS]2-→As(Ⅲ) →As(Ⅴ)的价态变化过程,揭示了细菌氧化过程中毒砂形貌变化规律和晶体的内在联系。
氧化亚铁硫杆菌, 毒砂, 细菌氧化
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【期刊论文】氧化亚铁硫杆菌对难处理金矿石中常见硫化物单矿物的氧化
杨洪英, YANG Hongying, YANG Li, ZHAO Yushan, CHEN Geng, LU Jiuji, FAN Youjing
有色金属,2001,53(3):9~12,-0001,():
-1年11月30日
过对难处理金矿石中各种硫化物单矿物进行的细菌氧化试验,发现在相同的条件下,硫化物晶体显微形貌变化、氧化腐蚀的时间截然不同。黄铁矿是最难氧化的硫化物矿物。黄铁矿细菌氧化全过程可分三个阶段,各阶段的黄铁矿显示不同的显微特征。黄铜矿是比较难于细菌氧化的矿物。除了毒砂之外,闪锌矿是易于细菌氧化的矿物,其它分别为方铅矿、黝铜矿、辉锑矿。
氧化亚铁硫杆菌, 难处理金矿石, 硫化物, 细菌氧化
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