Underground water colloid in-situ tangential flow ultrafiltration device

Abstract

The invention discloses an underground water colloid in-situ tangential flow ultrafiltration device. The underground water colloid in-situ tangential flow ultrafiltration device comprises an ultrafiltration unit, a pre-filtration unit, a sampling unit, and a control unit; inert gas is adopted by the control unit for driving, underground water colloid samples are driven to flow into the sampling unit; the control unit is mainly used for program controlling of opening and closing time of an accommodating bottle, and setting the N2 pressure in the accommodating bottle based on sampling depth. According to the underground water colloid in-situ tangential flow ultrafiltration device, the bamboo slip type tangential flow ultrafiltration unit is designed for assembling with a underground water sampling device, inert gas pressure is adopted to drive water samples to flow into the tangential flow ultrafiltration unit and realize separation of colloid in the water samples; after in-situ separation, the colloid is taken out from the underground water colloid in-situ tangential flow ultrafiltration device for laboratory analysis; a difficult problem in the prior art that separation of colloidin sampled underground water is easily influenced by the environment is solved. The underground water colloid in-situ tangential flow ultrafiltration device can be widely used in sampling and separating of underground water colloid, and providing reliable technology approaches for study on influences of colloid on underground pollutant migration in the field of environment safety.

Description

technical field [0001] The invention relates to the field of environment and geotechnical engineering, in particular to an in-situ tangential flow ultrafiltration device for ground water colloid. Background technique [0002] Groundwater colloid is a general term for various suspended solid particles in groundwater, generally referring to suspended particles with a size of 1nm to 1000nm. Groundwater colloids can adsorb and carry heavy metal elements and radioactive nuclides in water, making pollutants flow with colloidal particles in the groundwater medium, which has an important impact on the migration of pollutants in groundwater. In order to study the influence of groundwater colloids on the migration of pollutants, it is first necessary to accurately characterize the colloids in water, including colloid content, composition, and particle size distribution, and the primary task of characterization is to enrich and separate trace colloids in water. Tangential flow ultrafi...

AI Technical Summary

Problems solved by technology

However, if the groundwater is sampled to the surface and the colloids are separated by a tangential flow ultrafiltration device, the composition characteristics of the colloids will change due to changes in environmental pressure and atmosphere, which will affect the understanding of the characteristics of the colloids in the groundwater

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