煤中黄铁矿表面细菌氧化的XRD及SEM/TEM研究  

Research on SEM/TEM and XRD of Germ Oxidizing Pyrite Surface in Coal

作　　者：张东晨[1] 张明旭[1] 陈清如[2] 

机构地区：[1]安徽理工大学材料科学与工程系,安徽淮南232001 [2]中国矿业大学化工学院,江苏徐州221008

出　　处：《中国矿业大学学报》2005年第6期761-765,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50344037);高等学校博士学科点专项科研基金项目(20020290006)

摘　　要：借助于XRD和SEM/TEM等表面分析测试技术,对煤中黄铁矿表面经氧化亚铁硫杆菌作用前后的表面微观结构的变化进行了研究.作为对比,同时采用了氧化剂(H2O2)对黄铁矿表面进行氧化试验.结果表明,氧化亚铁硫杆菌在黄铁矿表面的氧化形式与氧化剂(H2O2)在黄铁矿表面的氧化形式不同.从黄铁矿表面微观结构的变化来看,氧化剂氧化的结果多出现钮扣状的片起,表现为较为剧烈的直接强氧化作用,而氧化亚铁硫杆菌氧化则呈现坑蚀,表现为相对缓和的吸附氧化作用.这为研究细菌对煤中黄铁矿表面的作用机理提供了一定的参考.Based on modern surface analysis test technology such as XRD and SEM/TEM, the microscopic structural changes of pyrite surface were studied by Thiobacillus ferrooxidans oxidation. As contrast, at the same time, an oxidize experiment was carried out by adopting oxidizer （H2O2）. The results show that oxidization form of Thiobacillus ferrooxidans in pyrite surface differs from that of oxidizer （H2O2）. The surface microscopic structure of pyrite oxidized by oxidizer appears as protuberant button form, which results from strongly direct oxidization. But the surface microscopic structure of pyrite oxidized by Thiobacillus ferrooxidans appears as hollow lose, which results from mitigative adsorption oxidation. This results provide a basis for revealing the role mechanism of germ on pyrite surface in coal.

关 键 词：煤 黄铁矿 氧化亚铁硫杆菌 双氧水 X射线衍射(XRD) 扫描电镜(SEM) 透射电镜(TEM) 

分 类 号：TD92[矿业工程—选矿]