JP2789146B2 - Pesticide removal sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet used for removing pesticides that have permeated and flowed out from the soil of a greening land.

[0002]

2. Description of the Related Art In recent years, greening land has been actively developed, such as golf courses, resorts, and multipurpose plazas. However, pesticides used for maintenance and management of lawns and trees in those areas are ordinary agricultural lands. It is used more than others, and because the soil is created so that the water permeability is very good, it penetrates into the soil by irrigation and natural rainfall and easily flows out into the drainage,
As a result, it causes serious environmental problems such as water pollution of downstream rivers and eutrophication of lakes and marshes. As a method for solving these problems, several methods for removing those harmful substances contained in wastewater have been proposed. For example, in the case of a golf course, the most frequently used pesticides are used by utilizing the adsorption performance of activated carbon. A method of adsorbing and removing pesticides that permeate and flow out of soil by spreading activated carbon over a ground surface such as a green or tea ground with a certain thickness is used.

[0003]

However, in this method, (1) it is extremely difficult to uniformly spread activated carbon in a constant thickness in soil, so that it is necessary to use more than the required amount. Economy. (2) The burial work requires a great deal of labor. And so on.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, provided a partition by a plate-like material between two permeable base fabrics. It has been found that the above problem can be solved by storing a remover for adsorbing and decomposing and removing pesticides in a space formed and burying this sheet in soil to complete the work.

Here, it is preferable that the two base fabrics have a property of being easily corroded and decomposed in soil. The reason is that if a material that easily decomposes in the soil is used, it is not necessary to remove the used removal sheet when burying a new removal sheet after using it for a certain period of time. In addition to being carried out, it is considered to be very effective in preventing the occurrence of environmental problems caused by these sheets remaining in the soil without being decomposed. No.

[0006] Further, it is preferable that the plate-like material constituting the partition also has a property of being easily corroded and decomposed in soil for the same reason as described above, and examples thereof include a knitted or woven cellulose fiber fabric, a nonwoven fabric, and paper or a water-soluble film. . In addition, the shape of the plate-like material serving as a partition is not particularly limited in manufacturing the intrinsic product.

[0007] Examples of the remover for adsorbing and decomposing and removing pesticides include activated carbon, microporous natural ores such as Iwami stone and barley stone, and synthetic metal oxides such as zeolites and ceramics. A single or a plurality of removers may be used in an arbitrary ratio according to the pesticide. In addition, the finer these removal agents, the larger the surface area,
Since the removal effect is considered to be increased, it is preferable that the particle size is 5 mm or less.

[0008]

[Function] Pesticides that penetrate the soil due to natural rainfall, irrigation, etc., come into contact with the remover in the remover sheet while passing through the remover sheet buried in the soil, and are adsorbed, decomposed and removed, and purified. Only the drained water will be drained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for producing a pesticide removal sheet according to the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 1
And 1 'are base fabrics having water permeability, which are composed of fibers which are easily corroded and decomposed in soil. An adhesive is applied to the base fabric 1 in an adhesive application section 2 by a known method such as a coating method or a printing method. As the adhesive used herein, a water-soluble adhesive that does not inhibit the water permeability of the base fabric is preferable. And processed natural gums such as guar gum and locust bean gum, and vinyl derivatives such as polyvinyl alcohol, polyvinyl acetate and polyvinyl acrylate. A plate-like material 3 constituting a partition is laminated on a base fabric 1 to which an adhesive has been applied by a laminating roll 4 and dried and fixed by a dryer 5.

Next, the pesticide remover 8 is uniformly dispersed on the entire surface of the base fabric to which the plate-like material 3 has been attached through the sieve 7 from the hopper 6. Here, the application amount of the pesticide remover can be controlled mechanically according to the required amount, so that it does not become partially uneven. Base fabric 1 on which pesticide remover is sprayed
A base cloth 1 ′ on which the above-mentioned adhesive is applied in advance by a known method such as a coating method or a printing method is laminated on a laminating roll 9 and then dried and fixed by a drier 10. Pesticide removal sheet 11
Is completed.

FIG. 2 shows a sectional view of a pesticide removal sheet according to the present invention and an example of use in soil. Here, rayon nonwoven fabrics having a basis weight of 60 g / m 2 and a weight of 70 g / m 2 are used as the base fabrics 1 and 1 ′.
A seedling-growing paper pot partitioned into a square of mm was used.

The pesticide remover has a particle diameter of 1 mm.
A mixture of the following activated carbon and a zeolite-based microporous metal oxide in a ratio of 1: 1 was used.
Grams / square meter. As shown in this figure, the pesticide that penetrates into the soil by natural rainfall or irrigation passes through the water-permeable base cloth 1 with respect to the removal sheet 11 buried at an appropriate depth below the grass 12 of the golf course. To the layer of remover 8. Here, the pesticides are adsorbed, decomposed and removed, and only the purified water passes through the permeable base fabric 1 'and further penetrates into the soil below.

Table 1 shows the results of removing various pesticides when the pesticide removal sheet according to the present invention was used.

[0014]

[Table 1]

The above data indicates that fenitrothion was 1000
3.2 liters / square meter of the diluted water solution and 3.0 liters / square meter of the 2,000 times diluted solution of eclomethol were sprayed.
After 5 minutes, the residual pesticide concentration in the wastewater flowing out of the drainage hole was measured.

[0016]

As shown in FIG. 2, the pesticide removal sheet according to the present invention uniformly stores the remover in the space formed by the two water-permeable base cloths and the partition. It is possible to form a uniform layer of the pesticide adsorption and decomposition / removal agent simply by burying it in the soil, and since it is in the form of a sheet, burying work in the soil becomes very easy.

[Brief description of the drawings]

FIG. 1 is a schematic view of a method for producing a pesticide removal sheet.

FIG. 2 is a cross-sectional view of a pesticide removal sheet and an example of use in soil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1 'Base fabric 2, 2' Adhesive coating apparatus (knife coater) 3 Plate-like material 4, 9 Laminate roll 5, 10 Dryer 6 Hopper 7 Sieve 8, 8 'Pesticide remover 11 Pesticide removal sheet 12 Turf 13 soil

Continuation of the front page (56) References JP-A-4-20603 (JP, A) JP-A-5-253562 (JP, A) JP-A 4-131402 (JP, U) JP-A 62-20604 (JP) , U) (58) Fields investigated (Int. Cl. ⁶ , DB name) C02F 1/28 E01C 13/00

Claims (4)

(57) [Claims] 1. A pesticide removal sheet in which a partition made of a plate-like material is sandwiched between two water-permeable base cloths, and a remover for adsorbing and decomposing and removing the pesticide is stored in a space formed by these. . 2. The pesticide removal sheet according to claim 1, wherein the two base fabrics are a woven or knitted fabric and a nonwoven fabric made of a fiber having a property of being easily corroded and decomposed in soil. 3. The platy material forming the partition is a woven or knitted fabric, a nonwoven fabric, or a paper or a water-soluble film made of fibers having a property of being easily corroded and decomposed in soil, and the shape of the partition is arbitrary. The pesticide removal sheet according to claim 1, characterized in that: 4. The pesticide removal sheet according to claim 1, wherein the remover is activated carbon having a particle size of 5 mm or less, a microporous natural ore, a simple substance of a synthetic metal oxide, or a mixture thereof.