JP2006300909A - Soil material salt water permeating tool using dialysis membrane - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil material salt water permeating tool using a dialysis membrane that can discharge or osmose, from the soil water, only micro ions or colloids having a specific sizes dissolved material such as chloride ions and colloids dissolving in the soil water, while keeping the structure of the soil. <P>SOLUTION: A ring with a thickness of about 2 cm and inner diameter of about 6 cm is sandwiched between two circular plates. Soil molded in a cylindrical shape is stored in a space covered with two circular plates and one ring. The height of a cylindrical soil sample matches with the ring height. The dialysis membranes are stored between the upper and lower faces of the cylindrical soil sample and the circular plates. A porous stone used in a soil test can be used as a filter material. The dialysis membranes can permeate water molecules and chloride compound ions. When they are used as partitions of solutions of different concentrations, osmotic pressure occurs and moves material. The dissolved material such as ions and colloids in the soil water is moved and separated by the dialysis membranes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention enables osmosis of salt water, chloride ions and colloids into soil water such as clay, silt and sand having a soil structure by using a dialysis membrane.

Porous stone has been used as a filter material for water permeation through conventional soil (for example, see Non-Patent Document 1).

None “Method and explanation of soil test”, Geotechnical Society of Japan, 2000, p. 334-338

Only fine ions and colloids such as chloride ions and colloids dissolved in soil water are drained or permeated from soil water. By using the present invention, it is possible to maintain the soil structure.

In order not to disturb the sedimentary structure in the natural ground, it is sandwiched between two circular plates and one circular ring, ensuring the stability of the shape of the soil sample and the invariance of the soil structure.

The soil material salt water infiltration tool using the dialysis membrane invented this time has the same soil structure because the total volume of the soil sample does not change when the soil sample is infiltrated with the test solution. The soil structure does not change even when the dissolved ionic substances are infiltrated into the soil water. Therefore, laboratory tests are possible when the natural ground changes the state of dissolved substances in soil water due to soil contamination.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.

As shown in FIG. 1, two circular plates and one ring plate made of a salt corrosion resistant material SUS306 are assembled. When assembling, a cylindrical soil sample whose soil structure is not disturbed is sandwiched.

A dialysis membrane is sandwiched between the top and bottom surfaces of the soil sample and the holes drilled in the two circular plates, and the two circular plates and one ring plate are connected and fixed firmly with bolts. .

Although the dialysis membrane is sandwiched between the ring plate surface and the circular plate surface, an O-ring is provided to prevent soil water leakage from the soil sample.

After the soil sample set, circular plate, and ring plate are tightened as shown in Fig. 1, the soil material salt water infiltration device using a dialysis membrane is submerged in the test solution in the container tank as shown in Fig. 2. Let

The test solution passes through the holes provided in the circular plate, further penetrates the dialysis membrane and comes into contact with the soil water, and continuity is ensured between the test solution and the soil water.

Sectional drawing of the soil material salt water penetration tool using the dialysis membrane which shows embodiment of this invention Cross-sectional view of soil material salt water penetrating tool submerged in test solution

Explanation of symbols

1 Dialysis membrane 2 O-ring 3 Bolt 4 Earth sample 5 Circular plate 6 Ring plate 7 Container tank 8 Test solution

Claims (1)

It has a structure in which a ring having a thickness of about 2 cm and an inner diameter of about 6 cm is sandwiched between two circular plates. In a space covered with two circular plates and one ring, soil formed in a cylindrical shape is stored. However, the height of the cylindrical soil sample matches the ring height. A dialysis membrane is placed between the upper and lower surfaces of the cylindrical soil sample and the circular plate.

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