Experiment on surface charge distribution of fine sediment

被引:41
作者
Huang Lei [1 ]
Fang HongWei [1 ]
Chen MingHong [2 ]
机构
[1] Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
[2] China Agr Univ, Coll Water Conservancy & Civil Engn, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
sediment; surface charge; micro-morphology;
D O I
10.1007/s11431-011-4730-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Surface charge distribution of particles is the fundamental problem for adsorption and desorption between sediment and contaminant. In this paper, we take quartz sand for example to measure its micro-morphology and surface charge distribution using the phase mode of the electrical force microscope. Then the statistical relation of micro-morphology and surface charge distribution is obtained. Results show that quartz sand possesses complex surface morphology, which has great impact on the charge distribution. Positive and negative charges mostly concentrate on the saddle, convex and concave parts of the surface, while distribute less in the groove, ridge and flat parts. This experiment provides a new method for understanding the process of flocculation in coastal and estuarine zone.
引用
收藏
页码:1146 / 1152
页数:7
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