石英与水溶液作用的界面反应特征  

CHARICTERISTICS OF REACTION AT INTERFACE BETWEEN QUARTZ AND AQUEOUS SOLUTION

作　　者：吴宏海[1] 黄瑞敏[1] 胡勇有[1] 郭晓磊[1] 

机构地区：[1]华南理工大学造纸与环境工程学院,广东广州510640

出　　处：《化学研究与应用》2001年第3期280-283,共4页Chemical Research and Application

基　　金：华南理工大学自然科学基金项目 !(E5- 3 0 2 0 80 );广东省博士后科学基金资助项目

摘　　要：In this paper,the surface sites of quartz and their protonation were first analyzed and discussed,and then the surface reaction of heavy metal ions,involving Cu 2+ ,Pb 2+ ,Cd 2+ and Ni 2+ ,with quartz were completely investigated.The pH PPZC (pristine point of zero charge) for quartz was about 2.8 and the surface protonation constants in log form,lg K int 1 and lg K int 2,were about -1.5,7.0,respectively.The adsorption mass of Cu 2+ decreased with the ionic strength changing from 0.1 to 1.0mol/L;while the adsorption mass of heavy metal ions,including Cu 2+ ,Pb 2+ ,Cd 2+ and Ni 2+ ,decreased with raise in temperature.The experimental results showed that the surface reaction of heavy metal ions with quartz was surface complexation adsorption in model and the supporting electrolyte ions had taken part in competing adsorption under the experimental conditions.In this paper,the surface sites of quartz and their protonation were first analyzed and discussed,and then the surface reaction of heavy metal ions,involving Cu 2+ ,Pb 2+ ,Cd 2+ and Ni 2+ ,with quartz were completely investigated.The pH PPZC (pristine point of zero charge) for quartz was about 2.8 and the surface protonation constants in log form,lg K int 1 and lg K int 2,were about -1.5,7.0,respectively.The adsorption mass of Cu 2+ decreased with the ionic strength changing from 0.1 to 1.0mol/L;while the adsorption mass of heavy metal ions,including Cu 2+ ,Pb 2+ ,Cd 2+ and Ni 2+ ,decreased with raise in temperature.The experimental results showed that the surface reaction of heavy metal ions with quartz was surface complexation adsorption in model and the supporting electrolyte ions had taken part in competing adsorption under the experimental conditions.

关 键 词：表面位 石英 重金属 界面反应 水溶液 质子化反应 重金属离子 吸附 

分 类 号：O647.3[理学—物理化学]