Experiment on surface charge distribution of fine sediment  

作　　者：HUANG Lei FANG HongWei CHEN MingHong 

机构地区：[1]Department of Hydraulic Engineering,State Key Laboratory of Hydro-Science and Engineering,Tsinghua University,Beijing 100084,China [2]College of Water Conservancy and Civil Engineering,China Agricultural University,Beijing 100083,China

出　　处：《Science China(Technological Sciences)》2012年第4期1146-1152,共7页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50909095);Chinese Universities Scientific Fund (Grant No. 2011JS131)

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.

关 键 词：SEDIMENT surface charge MICRO-MORPHOLOGY 

分 类 号：TQ153.2[化学工程—电化学工业] O441.1[理学—电磁学]