摘要
根据黄铜矿的X射线粉末衍射图谱建立了晶体结构模型,应用ICP-MS,AFM和XPS分析研究了黄铜矿在氩气与氧气环境中不同机械搅拌时间和不同pH值水溶液中的溶解特性和表面性质,建立了黄铜矿在水溶液中的溶解模型。实验结果表明,在纯水中,溶液中的铜和铁的浓度与时间的关系可定义为方程c=ksat+b;低pH值有利于黄铜矿的溶解;表面氧化缓慢,对黄铜矿溶解性影响微弱;纯水中黄铜矿的溶解性对有效比表面积影响不大,酸性条件下黄铜矿的溶解由表面化学反应控制;长时间溶解后黄铜矿表面呈富铜状态;溶解使表面粗糙度和晶格缺陷增加。
The dissolubility and surface properties of chalcopyrite were studied in different mechanical stirring time and different pH value solution under argon and oxygen atmosphere by ICP-MS,AFM and XPS analysis.Besides,the XRD diffraction pattern and crystal structure of chalcopyrite and its dissolution model in aqueous solution were established.The laboratory results indicate that the relationship between copper and iron concentrations in solution and time in pure water can be derived as the equation c=ksat＋b.The lower pH value makes it easier for chalcopyrite to dissolve,and that the surface oxidation is slow has minor effect on the dissolubility.In pure water,the dissolution of chalcopyrite has little influence on the effective specific surface area,and the dissolution is controlled by surface chemical reaction under acidic conditions.After long time dissolution,the surface of the chalcopyrite assumes copper-rich state relative to iron and the surface roughness and lattice imperfections increase.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2012年第2期519-524,共6页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金云南联合基金项目(u0837602)
云南省教育厅科学研究基金项目(2010J056)
昆明理工大学分析测试基金项目(No.2009-113)和昆明理工大学优秀博士学位论文培育基金项目(201009)资助
