Determination of Adsorption Parameters in Vadose Zone Soil Based on Weakly Adsorbed Pollutants

Abstract

The invention provides an aeration zone soil adsorption parameter tester based on weak adsorption pollutants. The aeration zone soil adsorption parameter tester at least comprises a sealing cover, an experiment section, a sampling device, a constant water head fixing device, a constant water head water feeding device, a constant water head liquid supplying device and a water supplying and liquid supplying switching device, wherein the experiment section is composed of a soil column, gauze elements, an organic glass plate with holes, a quartz sand filtering layer and a soil column bracket; the sealing cover is mounted at the top of the soil column and is used for sealing the top of the soil column; the sampling device is arranged on the upper part of the soil column; the constant water head water feeding device and the constant water head liquid supplying device are mounted on the constant water head fixing device, and the upper and lower positions of the constant water head water feeding device and the constant water head liquid supplying device can be adjusted; the bottom of the constant water head water supplying device is connected with a water outlet pipe; the bottom of the constant water head liquid supplying device is connected with a liquid outlet pipe; and the water outlet pipe, the liquid outlet pipe and an input pipe are connected with the water supplying and liquid supplying switching device. The device can be used for accurately determining retardation factors and distribution factors of the pollutants with the relatively weak adsorption effect in aeration zone soil; and meanwhile, the method is simple and reliable.

Description

technical field [0001] The invention relates to a device for measuring adsorption parameters of vadose zone soil, in particular to a device for measuring adsorption parameters of vadose zone soil based on weakly adsorbed pollutants. Background technique [0002] With the rapid development of modern soil physics and computer technology, more and more mathematical models are used to study and master the migration process of chemical fertilizers and pesticides in unsaturated soil in the quantitative study of solute transport. Therefore, it is necessary to correctly determine the necessary parameters in the mathematical model, such as the retardation factor and partition coefficient of the governing equation of solute transport—the convection-diffusion equation. It is of great significance to the research on the pollution of groundwater by chemical fertilizers and pesticides, the law of regional water and salt movement, and the technology of sewage treatment and reuse. [0003]...

AI Technical Summary

Problems solved by technology

However, a large number of studies have shown that the measurement results of static experiments are significantly higher than the experimental results under osmotic conditions.

Images