石油烃类污染土壤电阻率特征及其影响因素

为研究不同类型土壤受到石油烃污染后电阻率的变化情况和影响因素,采用米勒盒对4种不同类型的污染土壤进行室内电阻率实验.结果表明:粗砂和细砂的电阻率随着污染物量增加而减小,粉土和黏土的电阻率随着污染物量增加而增大,呈现出相反的趋势;当含水率大于30%时,改变含水率对土壤电阻率的影响很小,此时决定污染土电阻率的因素为土壤类型和污染物含量;温度是影响土壤电阻率的一个重要外部环境因素,受污染土壤电阻率随着温度升高而降低,符合修正参数的Campbell经验公式.

Research of petroleum hydrocarbon contaminated soil resistivity and influencing factors

To study the Situation changes and influencing factors of soil resistivity when different types of soil were polluted by petroleum hydrocarbon, miller soil box was used in the indoor pollution soil resistivity experimenton the four different types of soil. The results showed that the grit and fine sand resistivity decreased when they were invaded by petroleum hydrocarbons pollutants, and silt and clay soil resistivity increased when they were invaded by petroleum hydrocarbons pollutants, which showed the opposite trend.When moisture content was more than 30%, the change of moisture contenthardly influenced the soil resistivity, and then thedecisive factors were soiltype and the pollution level.Temperature is an important external environmental factors of soil resistivity.With the temperature rising, the polluted soil resistivity reduced, which conformedt campbell's empirical formula of amendatory parameters.