Determination of soil adsorption parameters in vadose zone based on strongly adsorbed pollutants

Abstract

The invention provides an aeration zone soil adsorption parameter tester based on strong adsorption pollutants. The aeration zone soil adsorption parameter tester comprises a detachable soil column, a buffering section, a soil column fixing device, 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 a soil sample is put into the detachable soil column; the detachable soil column is composed of a soil column inner ring, a soil column outer ring, an inner ring handle and an outer ring handle; the buffering section is composed of an organic glass tube, a gauze element A, a gauze element B, an organic glass plate with holes and a quartz sand filtering layer; 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; and the bottom of the constant water head liquid supplying device is connected with a liquid outlet pipe. The device can be used for accurately determining retardation factors and distribution factors of the pollutants with the relatively strong 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 strong adsorption of 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. [...

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Problems solved by technology

However, in the current traditional soil column, the soil column can only be cut after the experiment is over to complete the sampling, which makes the operation of the experiment complicated, and it is easy to disturb the soil, and it also increases the risk factor of the experiment.

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