摘要
首次提出了一种间接测定悬浮粒子Stern电位的方法 ,即通过测定悬浮粒子在不同浓度NaCl( 0 .0 1～ 0 .40mol/L)溶液中的 ζ 电位 ,按照Gouy Chapman理论一般公式之对数变换式 ,用作图法计算悬浮粒子的Stern电位。用该方法研究了黄河口悬浮粒子Stern电位的变化规律。结果表明 ,在淡、咸水混合初期 ,悬浮粒子的Stern电位迅速减小 ;当S >3.5时 ,Stern电位不再随盐度的增大而变化。由此提出 ,对Ca2 +和Mg2 +的吸附是影响河口悬浮粒子Stern电位变化的主要因素。
This article puts forward for the first time an indirect method of determining the Stern potential of suspended particles. This method consists in frist determining the Zeta potential of suspended particles in the solution of NaCl (0.01～0.40mol/L) and then obtaining the Stern potential according to the equation of Gouy Chapman theory by using the linear construction method. The regularity of the variation in the Stern potential of the suspended particles from the Huanghe River estuary was then studied by this method. The results indicate that the Stern potential of the suspended particles from the Huanghe River estuary decreases rapidly at the beginning of the estuarine mixing, but it does not change along with the increasing of salinity when the salinity is greater than 3.5. It was believed that the adsorption of Ca 2+ and Mg 2+ on the surface of suspended particles is the main factor which affect the Stern potential of estuarine suspended particles.
出处
《黄渤海海洋》
CSCD
2000年第2期73-78,共6页
Journal of Oceanography of Huanghai & Bohai Seas
基金
山东省自然科学基金资助项目!( 91E0 659)
关键词
Stern电位
悬浮粒子
测定方法
黄河口
Stern potential
suspended particle
determining method
Huanghe River estuary
