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运用带电颗粒表面性质联合分析法,测定了不同pH值条件下(pH7和4.5)下红壤、黄壤和石灰性紫色土的表面电荷性质.结果表明:在相同pH值条件下,石灰性紫色土比可变电荷土壤有较高的表面电位、表面电场强度、表面电荷数量和比表面积,且3种土壤的表面电场强度都可达108 V/m的数量级;随着pH值的降低,3种土壤的表面电荷数量和表面电荷密度显著减小;pH值为4.5时,红壤和黄壤的表面电位和表面电荷数量接近.
The surface charge properties of red soil, yellow soil and calcareous purple soil under different pH values (pH7 and 4.5) were measured by the method of the joint analysis of charged particle surface properties.The results showed that under the same pH value, the ratio of calcareous purple soil The surface charge of the three kinds of soils is higher than that of the surface soil, and the surface electric field intensity of the three kinds of soils can reach the magnitude of 108 V / m. With the decrease of pH value, The number of surface charges and the surface charge density were significantly reduced. At pH 4.5, the surface potentials and surface charges of red soil and yellow soil were similar.