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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。
A method for indirect determination of the Stern potential of suspended particles was first proposed. By measuring the zeta potential of the suspended particles in solutions of NaCl (0.01-0.20 mol / L) at different concentrations, the logarithm of the general formula of Gouy Chapman’s theory Transform, used to calculate the Stern potential of suspended particles. The method was used to study the variation of Stern potential of suspended particles in the Yellow River estuary. The results showed that the Stern potential of suspended particles decreased rapidly in the early stage of light and salt water mixing. When S> 3.5, the Stern potential no longer changed with the increase of salinity. Therefore, it is suggested that the adsorption of Ca2 + and Mg2 + is the main factor that affects the change of Stern potential of aerosol.