JPH03262805A - Agricultural chemical purifying facility, purifying method and ground structure of green of golf course and others - Google Patents

Abstract

PURPOSE:To prevent agricultural chemical from flowing into a neighbouring river system by adsorbing and removing the agricultural chemical contained in the water permeated into the ground from a green of a golf course and/or a lawn vegetation layer of a tee ground with an adsorbent in the ground. CONSTITUTION:Activated carbon layers 3, 6 are provided by accumulating them so as to cover the overall area under a sand layer 2 under a lawn vegetation layer 1 of a tee ground and/or under a sand layer 5 under a lawn vegetation layer 4 of a green. Then, agricultural chemical and others sprinkled on a lawn of the ground surface is permeated with rain water into the ground at the time of raining, and the rain water passes through from the lawn vegetation layer 1 (or 4) to the sand layer 2 (or 5) quickly and reaches the activated carbon layer 3 (or 6). Successively, the agricultural chemical contained in the permeating water is adsorbed in an activated carbon and removed at the time when the permeating water passes through the activated carbon layer 3 (or 6).

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method, ground structure, and pesticide purification equipment for purifying pesticides sprayed on a golf course, and more specifically, to a method for purifying pesticides sprayed on a golf course. The present invention relates to a purification method for preventing sprayed agricultural chemicals from being contained in rainwater and flowing into nearby water systems, a ground structure for the purpose, and purification equipment.

(Background of the Invention and Prior Art) In recent years, as the golfing population has increased, golf courses have been established in various places. This is attracting attention as a problem that causes environmental pollution.

Particularly in recent years, it has become difficult to construct new golf courses because such environmental pollution problems remain unresolved, and improvement of environmental pollution problems has become a major issue even at existing golf courses.

The problem of environmental pollution near golf courses is that as a result of pesticides being sprayed over a wide area at golf courses, water containing pesticides can seep into the ground during rainfall, reach the groundwater veins, contaminate the groundwater system, or flow into rivers. It is known as a pollution problem. One of the reasons why it is difficult to solve such problems is that pesticides, which are generally sprayed over a wide area of several tens of square meters, are diluted by rainwater, and the terrain differs from golf course to golf course. Therefore, it flows out through a complicated route.

Therefore, in order to treat wastewater containing pesticides from factories, etc., polymer flocculants are added to the wastewater to coagulate the pesticides in the wastewater, which is separated by filtration, and the trace amounts of pesticides remaining in the filtrate are adsorbed. A treatment method in which adsorption with a material (for example, JP-A-55-1
No. 42588) cannot be applied as a solution to the problem of environmental pollution caused by pesticides, which are widely sprayed outdoors at golf courses.

For this reason, no effective method has yet been proposed to solve the pollution of the surrounding environment caused by pesticides associated with golf courses.

By the way, especially on the greens and teeing grounds of a golf course, watering and drainage facilities are generally installed in order to manage and manage the cultivation and protection of the lawn. There are proposals to bury water collection pipes (for example, Japanese Patent Application Laid-Open No. 169505/1982), and methods to collect and store water from within the ground of greens when it is not easy to secure the amount of water required for greens using rainwater or groundwater alone. However, there are proposals to recycle this water as irrigation water (e.g. Japanese Patent Laid-Open No. 62-210930 and others)9, but in the latter proposal, as a result of reusing used water, water containing agricultural chemicals must not be discharged to the outside. It is explained that environmental pollution problems in the neighborhood will be avoided.

However, this proposed method does not disclose a technique for removing the pesticide itself contained in the water that is sprayed on a golf course and permeates into the ground.

(Problem to be Solved by the Invention) As mentioned above, in order to prevent water containing pesticides sprayed at golf courses from flowing into nearby water systems such as underground water veins and rivers, pesticides contained in ground seepage water, etc. Until now, there has been no proposal to remove it from this water.

In view of the above-mentioned current situation, the inventors of the present invention have conducted extensive research on the technical issue of removing agricultural chemicals themselves from soil seepage water containing agricultural chemicals used at golf courses.

In other words, in order to consider such technical issues, the present inventors first determined that at golf courses, most of the chemical substances such as pesticides are
It is used on greens and teeing grounds (hereinafter referred to as "greens, etc.") where lawn maintenance and management are particularly required (generally about 60 to 70% of the entire golf course).
I paid attention to that.

In addition to the maintenance and management of the lawn, it is common for greens to have a permeable layer called a sand layer made of sand or Java in the ground because water retention on the grass surface can be a hindrance to competitions. The special characteristics of the ground structure that exist,
This is a matter for consideration.

Furthermore, agricultural chemicals used on golf courses include not only insecticides and herbicides that provide their original effects, but also adhesives that allow these agents to adhere to the grass vegetation layer for a long time, increasing the sustainability of their effects. It was also decided that the inclusion of

Through consideration of these various matters, and based on a new idea that had not been considered before, the present inventor has determined that the pesticides sprayed on the greens, which account for the majority of the pesticides sprayed at golf courses, are contained in rainwater. The present invention has been developed to effectively solve the problem of water seeping into the ground and flowing into nearby water systems.

That is, the first object of the present invention is to provide a method for purifying agricultural chemicals that can prevent agricultural chemicals sprayed on golf course greens from being included in rainwater and flowing into nearby water systems, a ground structure for the purpose, and purification equipment. The purpose is to provide.

Another object of the present invention is to provide an excellent ground structure that can remove and purify agricultural chemicals and improve the maintenance and management of lawns such as greenery compared to conventional methods.

(Means and effects for solving the problem) The feature of the pesticide purification method of the present invention that achieves the above object is that the pesticide sprayed on the grass vegetation layer, such as greenery, is contained in rainwater and penetrates into the ground. Second, the agricultural chemicals contained in rainwater are adsorbed and removed in the ground using an adsorbent. Examples of the adsorbent include inorganic adsorbents such as zeolite and perlite, carbon adsorbents such as activated carbon and bone charcoal, and organic synthetic adsorbents such as styrene, phenol, and acrylic. Activated carbon is particularly preferred (the same applies below).

Another feature of the present invention is that in order to realize the above method,
It has a ground structure in which an adsorbent layer is provided below the grass vegetation layer such as greens, etc., and such a ground structure is either laminated with a water permeable layer provided in the ground of greens, etc., or is composed of a water permeable layer. For example, it can be formed by providing a mixed layer of sand and adsorbent.

In addition to the above configuration, the ground structure of the present invention also includes a water collection pipe provided below the adsorbent layer laminated or mixed with the permeable layer, and an impermeable water collection pipe that prevents water from penetrating downward from the water collection pipe position. A more desirable effect can be achieved by providing a layer, and such a ground structure is also one of the features of the present invention. In addition, when a water collection pipe and an impermeable layer are provided in the ground together with the adsorbent layer, it is appropriate to provide the adsorbent layer around the water collection pipe, which serves as a water passageway for water that seeps into the ground.

In addition, the purpose of purifying pesticides sprayed on greens, etc. of the present invention is to install a water collection pipe below the permeable layer in the ground of the green, etc., and an impermeable layer that prevents water from penetrating downward from the water collection pipe position. This can also be achieved by using purification equipment that provides a layer and allows water collected from this water collection pipe to pass through an adsorbent tank. When such pesticide purification equipment is installed, since the pesticides have essentially been adsorbed and removed from the water that has passed through the adsorbent tank, biological organisms are added to the subsequent stage for the purpose of decomposing and removing organic matter that is not adsorbed by the adsorbent. This is a preferable configuration since a chemical treatment tank is provided.

In the present invention, which is explained by the above-mentioned several characteristic configurations, in order to provide an adsorbent layer under a grass vegetation layer such as a green, it is generally several tens of centimeters to a layer made of sand.
Although it is often provided in a layered manner below a sand layer of approximately 1 m, an adsorbent layer can also be provided in a layered manner above a water-permeable layer as long as the adsorbent material does not adversely affect the vegetation of the lawn. The above-mentioned adverse effect refers to a problem in which activated carbon or the like adsorbs pesticides that should act on the roots of lawns, and as a result, for example, the pesticides do not have an effect on root-cutting insects of lawns. Therefore, the method of spreading activated carbon etc. on the lawn surface defeats the insecticidal purpose of spraying pesticides, so the effect of spraying pesticides and the purpose of the present invention, which is to remove pesticides at the stage where they permeate into the ground, are It cannot be accomplished conveniently.

The layer thickness when adsorbent is laminated in the ground depends on the particle size of the adsorbent used, but generally when activated carbon is used as the adsorbent, it is 1 to 100111111, preferably 10 to 100. In many cases, it is appropriate to set it to about 5011Im.

Moreover, it is also a preferable configuration to form an adsorbent layer as a mixed layer by mixing it with sand that forms a water-permeable layer. According to this, the adsorbent is widely distributed in the vertical direction of the ground, and the time for contact with agricultural chemicals that permeate into the ground together with rainwater can be obtained for a longer time than when a thin adsorbent layer is provided.

The adsorbent used to form the adsorbent layer as such a laminated or mixed layer may be in the form of spheres, crushed particles, or powder, but especially in the mixed layer, the adsorbent may have an effect on water permeability. Therefore, powdered adsorbents with high adsorption reaction rates are preferably used.

The required amount of adsorbent when forming the above-mentioned ground structure can be calculated in relation to the amount of pesticide sprayed per unit area. For example, when using activated carbon as an adsorbent,
Assuming that the period of use is 10 years, the amount of activated carbon required to adsorb the total amount of pesticides etc. sprayed every year should be 10 times. In reality, the amount of activated carbon required for a standard 18-hole golf course is calculated to be approximately 140.

The greens etc. at golf courses are maintained for several years (generally 5 years).
It is normal for it to be dug up and rebuilt in about 20 years, so
There are no technical or resource problems in practical application of the present invention;
Furthermore, it is economically feasible considering the cost of current adsorbents.

In addition, the ground with a layer of activated carbon as an adsorbent can improve the water retention capacity of the ground without reducing the drainage (water permeability) required for greenery, making it advantageous for the management of lawn vegetation. There are also some advantages. This is because compared to sand, which is generally a material that constitutes a water-permeable layer in the ground such as greens, adsorbents, especially granular activated carbon, have water permeability between roads, etc., but sand has a water retention capacity of about 14%. This is because the water retention capacity of activated carbon is about twice as high.

In addition to the structure with an adsorbent layer as described above,
A ground structure with a water collection pipe and an impermeable layer that prevents water from penetrating downward from the water collection pipe can better adsorb and remove pesticides and more reliably prevent pesticides from flowing into the groundwater system. .

For such a ground structure, a synthetic resin sheet or the like is used as the above-mentioned impermeable layer, and for example, the green is wrapped slightly outside of the green in a forest-like manner, and a water collection pipe is installed at the center bottom of the green. An example of this is a structure in which adsorbents are placed and buried in a concentrated manner around a water collection pipe, but the invention is not particularly limited to such an example.

In the present invention, agricultural chemicals include various agricultural chemicals such as insecticides, fungicides, and herbicides used to protect lawns, flowers, and trees, as well as agricultural chemical additives such as surfactants, casein, P.V.A.

Contains adhesives such as gelatin. Although most adhesives are not normally adsorbed by adsorbents, these types of substances are generally decomposed and removed by microorganisms that breed in the ground. In addition, in the ground having the adsorbent layer of the present invention, microorganisms that are difficult to breed in the presence of pesticides, etc. can be adsorbed and removed by the adsorbent in the ground, creating an environment suitable for breeding. It has the advantage of being able to decompose and remove even substances that are not directly related to environmental pollution.

In addition, the purpose of purifying pesticides sprayed on greens, etc. of the present invention is to install a water collection pipe below the permeable layer in the ground of the green, etc., and an impermeable layer that prevents water from penetrating downward from the water collection pipe position. This can be achieved later by providing a purification system in which a layer is provided and the water collected from the water collection pipe is passed through an adsorbent tank. When such pesticide purification equipment is installed, since the pesticides have essentially been adsorbed and removed from the water that has passed through the adsorbent tank, biological organisms are added to the subsequent stage for the purpose of decomposing and removing organic matter that is not adsorbed by the adsorbent. It is also a preferable configuration to provide a chemical treatment tank. In addition, in the case of such a configuration, by providing a buffer tank on the way from the water collection pipe to the adsorbent tank, it is possible to artificially control the amount of water flowing into the adsorbent tank, and the amount of agricultural chemicals in the adsorbent can be controlled. It has the advantage of improving removal efficiency and achieving efficient removal with a smaller amount of adsorbent.

(Example) The present invention will be described below based on embodiments shown in the drawings.

Example 1 This example shows an example in which activated carbon is layered as an adsorbent in the ground of a green or the like.

Figure 1 (a) is a diagram explaining the outline of the ground structure of the teeing ground. In this diagram, 1 is the surface grass vegetation layer, 2 is the sand layer as a permeable layer, and 3 is the sand layer below this sand layer 2. This shows activated carbon layers stacked to cover the entire area.

Figure 1(b) is a diagram explaining the outline of the ground structure of the green, which, like the ground structure of the teeing ground described above, includes a grass vegetation layer 4 on the surface, a sand layer 5 as a water permeable layer below it, and a sand layer 5 below. Activated carbon layers 6 are stacked and provided so as to cover the entire area below the sand layer 5.

In the above structure, the surface lawn vegetation layer 1.4 and the sand layer 2.5 below it may be the same as those provided in the conventional green ground.

Figure 2 shows in detail a vertical section of the ground structure formed in such greens, etc., and shows the grass vegetation layer 1 (or 4), the sand layer 2 (or 5) below it, and
There is an activated carbon layer 3 (or 6) provided below this sand layer 2 (or 5), and below the activated carbon layer there is a normal soil layer 7 and a gravel layer 8.

In greens with such a ground structure, pesticides, etc. sprayed on the grass on the ground permeate into the ground together with rainwater during rainfall, and the rainwater quickly passes from the grass vegetation layer 1 to the sand layer 2, and then the activated carbon layer. 3.

When the permeated water passes through this adsorbent layer 3, pesticides and the like contained in the permeated water are adsorbed to the activated carbon and removed from the water, and the water that permeates further downward does not contain substantially any agricultural chemicals. become. Therefore, the water passing through the soil layer 7 and the gravel layer 8 below does not contain pesticides, and even if this water flows into the groundwater vein, the problem of environmental pollution caused by pesticides, which has been a problem in the past, will not occur at all. Moreover, since there are no pesticides in the water flowing through the soil layer 7 below the activated carbon layer 3, it is possible to provide an environment similar to the breeding environment for organic matter decomposing microorganisms in ordinary soil, and organic matter that is not adsorbed to the activated carbon can also be absorbed. It has the effect of being decomposed.

Additionally, activated carbon has twice the water-holding capacity compared to sand layers, which improves the water-holding capacity of the ground itself.
This also has the effect of being beneficial for growing and maintaining lawns such as greens.

In order to confirm that the above configuration adsorbs and removes the pesticides contained in the permeated water that has passed through the activated carbon layer, we compared the amount of pesticides sprayed on an actual golf course and the amount of adsorbent used. ,
A confirmation test was conducted on the removal efficiency and the removal efficiency using the following reduced model.

(1) Announcement of the model green A circular ground with a diameter of 30 cm was prepared as follows for the model green.

Soil structure Lawn vegetation layer The lawn vegetation soil layer is approximately 2 cm thick including the roots.
A sand layer of approximately 2 cm was placed underneath.

Activated carbon layer Under the above sand layer, granular activated carbon with a grain size of 20 to 30 mesh is placed at thicknesses of 10 mm, 30 mm, 50 m+m, and 100 m, respectively.
They were stacked in layers to form model greens.

permeable layer A shari layer of approximately 5 cm was provided below the activated carbon layer.

(2) ゛ The standard concentration of pesticides actually used on golf courses is about 200 ppm as a undiluted solution of pesticides, but it is important to note that the pesticides contained in the water that permeates into the ground are diluted by rainwater. Taking into account, 50 ppm for each of the following three pesticides,
Sample pesticide solutions of 200 ppm and 500 ppm were prepared, and each of these samples was independently tested.

Herbicide: Cremato (manufactured by Sumitomo Chemical Co.) Insecticide: Sumithion (manufactured by Sumitomo Chemical Co., Ltd.) Fungicide...
...Glancer (manufactured by Sumitomo Chemical Co., Ltd.) (3) Dongfujo Ushi The above sample pesticide liquid was intermittently rained on the above model green at 200 mm/hour separately, and the water permeable layer (Java layer) of the model green was Collect water flowing down from below,
The last sample 112 at the time of collection of IE5j2 from the start of rain was used as a sample solution for measuring residual agricultural chemicals.

(4) After extracting the above sample solutions of '8 with dichloromethane, use a gas chromatograph Shimadzu GC-14^ (manufactured by Shimadzu Corporation).
It was measured with

As a result of the measurement, residual pesticides were found to be 0.0 in all samples.
It was below the detection limit of 0.001 ppm or less. As is clear from the above results, according to the ground structure of this example in which an activated carbon layer was formed below the sand layer in the ground, it was possible to spread green etc. It has been empirically confirmed that the problem of pesticides being contained in rainwater and penetrating into the ground and flowing into the groundwater system can be effectively prevented.

Example 2 Figure 3 shows an example in which a layer of adsorbent (e.g. activated carbon) is mixed with sand to form a sand layer to provide a mixed permeable layer that is essentially a mixture of sand and adsorbent. ing. That is, 9 is a mixed permeable layer (simultaneously forming an adsorbent layer) in which sand and adsorbent are mixed at a predetermined ratio, and a gravel layer 8 exists below it.

According to the ground with such a structure, the contact rate between the pesticide in the permeated water and the adsorbent is greater in the vertical section of the ground than when the sand layer and adsorbent layer are laminated, and therefore the removal efficiency of pesticides is improved. It has the advantage of reducing the amount of adsorbent used, and also has the advantage of improving water retention while maintaining water permeability to the same level as a conventional sand layer, so it is possible to maintain the grass vegetation layer with less adsorbent. It also has the effect of being easy to manage.

Example 3 This example shown in FIG. 4 has the advantages of Example 1.2 above.
This is to explain an example in which it is used more effectively. Specifically, an impermeable sheet 1O is provided to wrap around the lawn vegetation layer 5 such as the green 4, and on top of this impermeable sheet 1O. An example is shown in which a water collection pipe 11 is provided and an adsorbent layer 12 is provided around the water collection pipe 11 in which an adsorbent (for example, activated carbon) is buried in a concentrated manner so as to remove agricultural chemicals contained in flowing water.

According to this embodiment of the present invention, water that collects in the water collection pipe 11 always passes through the adsorbent layer 12 during its passage.
Since it comes into contact with the pesticide, reliable removal of pesticides can be achieved.
Moreover, since the water collection from the water collection pipe 11 can be controlled artificially, there is an advantage that the amount of adsorbent used in the adsorbent layer 12 can be reduced.

By adjusting and setting the height of the outlet from the water collection pipe 11, the height of water retention in the ground within the impermeable sheet 10 can be determined. It is possible to ensure long-term contact between the adsorbent and the accumulated water.

Example 4 Compared to the ground structure explained in Example 3, this example has the same structure as Example 3 except that no adsorbent layer is provided in the ground.The characteristics of this example are as shown in Fig. 5. The water collected from the water collection pipe 12 is collected in a water collection pond 13, and the stored water is passed through an adsorbent tank 14 to adsorb and remove agricultural chemicals.

Note that it is preferable to adopt a configuration in which the water treated in the adsorbent tank 14 is biologically decomposed in the activated sludge tank 15; It may be reused or released for water management at golf courses.

According to this example, chemical substances such as agricultural chemicals sprayed at golf courses are substantially removed from the water stored in the reservoir 16, and there is no problem even if the water is discharged. Alternatively, if necessary, the water can be used as water needed for lawn vegetation on a golf course.

(Effects of the Invention) As explained above, according to the present invention, pesticides sprayed on the greens, etc., where most of the chemical substances such as pesticides are used at golf courses, are contained in rainwater, etc., and enter nearby water systems. This has the effect of preventing water from flowing in.

Therefore, the effect of solving the problem of environmental pollution near golf courses, which has become a problem in recent years, can be obtained.

In addition, the ground structure of the present invention with an adsorbent layer removes pesticides, improves the water retention capacity of the ground, and provides a better breeding environment for microorganisms than the conventional sand layer.
It also has a beneficial effect on the decomposition of chemicals other than pesticides and the maintenance and management of green lawns.

Furthermore, the ground structure of the greens, etc. of the present invention can be applied not only to newly constructed golf courses, but also to existing golf courses when digging up and reconstructing the greens, etc. This has the effect of eliminating most of the pesticides and other substances sprayed in the area from causing environmental pollution in the surrounding area, and its social significance is extremely significant.

[Brief explanation of drawings]

FIG. 1 shows the green of Example 1 of the present invention (FIG. 1(a))
A cross-sectional view of the ground to explain the outline of the ground structure of the teeing ground (Fig. 1 (b)), and Fig. 2 is Example 1 of the same.
3 is a diagram for explaining the details of the ground structure of Embodiment 2 of the present invention.
The figure is a diagram for explaining the configuration of the ground structure according to the third embodiment of the present invention, and FIG. 5 is a diagram for explaining the outline of the configuration of the purification equipment according to the fourth embodiment of the present invention. ■. 3゜7: 9: 1O: 12: 13: 15= 4: Lawn vegetation layer 6: Adsorbent layer Soil layer Mixed permeable layer Impermeable sheet Activated carbon layer Water collection basin Activated sludge tank 2.5: Permeable layer 8: Gravel layer 1: Water collection pipe 14: Adsorbent tank 16: Reservoir pond Figure 1 Figure 2 Figure 3 Figure 4 Figure procedure amendment document February 22, 2004 2nd year, 2019 application for retention period 3rd year 4th? Applicant related to the person making the amendment case 1 Company 8゜Contents of Amendment As shown in the attached sheet, Amendment Procedures Amendment June 1991 fB The following matters will be amended in the specification of the application. On page 9, second line from the bottom, is the 1990 Permit Application No. i! ;, f71IL? In the issue of ``Pesticide Purification,'' the text should be corrected to ``Pesticide Purification.'' Related to the case Applicant 2, page 11, lines 1 and 2, says, ``The purpose of spraying pesticides is to kill insects.'' , for this purpose.'' Address: 3303 Marunouchi Shigesu Building, 2-6-2 Marunouchi, Chiyoda-ku, Tokyo, page 16, 2nd line, it says ``3 is for this sand layer 2.'' R3 and 6 are for this sand layer 2.'' 5゜Date of correction order@issued. 7゜Amendments to be made The following matters in the specification of the application will be amended. Note 1: The scope of claims is amended as shown in the attached sheet. 2. In the first line of page 5, the words "dispersed" are corrected to "dispersed". 3. On page 8, lines 12-13, the phrase "in the case of penetration" is corrected to "in the case of penetration." 4. In the third line from the bottom of page 11, the phrase ``to form'' is corrected to ``to form.'' 5. On page 14, line 9, it says "On the ground". Correct it to "On the ground". 6. In the first line of page 17, the word "green" is corrected to "green, etc." 7. In the second line from the bottom of page 21, the phrase "to wrap around" is corrected to "to wrap around." 8. In the second line of page 23, the phrase "water collection pipe 12" is corrected to "water collection pipe 11." 9. On page 23, lines 3 and 6, the words ``r-adsorbent tank 14'' are corrected to ``activated carbon adsorbent tank 14.'' 10. In the third line from the bottom of page 25, the text "12: Activated carbon layer" is corrected to "12: Adsorbent tank." Claim 1 is characterized in that pesticides contained in trees that permeate underground from the grass vegetation layer of the green and/or teeing ground of a golf course are adsorbed and removed within the ground (with a laminated or dispersed adsorbent). A method for purifying agricultural chemicals, etc. on golf course greens, etc. 2. Features: An easily permeable layer and an adsorbent layer are laminated and provided below the grass vegetation layer on the golf course green and/or teeing ground. 3. In claim 2, a water collection pipe is provided below the laminated layer of an easily permeable layer and an adsorbent layer, and water flows downward from the installation position of the water collection pipe. A ground structure for golf course greens, etc., characterized by providing an impermeable layer to prevent seepage. 4. Mixing and dispersing an adsorbent under the grass vegetation layer of the golf course green and/or teeing ground. TaJ!lI
A ground structure at a golf course that is characterized by having a water-permeable layer. In claim 5, ii, below the easily permeable layer in which the adsorbent is mixed and dispersed, a water collection pipe and an impermeable layer that prevents water from penetrating downward from the water collection pipe position are provided. The ground structure of greens, etc. of golf courses is a characteristic feature. 6. The ground structure at a golf course green or the like according to any one of claims 1 to 5, wherein the adsorbent is activated carbon. 7. A water collection pipe and an impermeable layer that prevents water from penetrating downward from the water collection pipe position are installed below the permeable layer provided under the grass vegetation layer of the green and/or teeing ground of the golf course. 1. Pesticide purification equipment for golf course greens, etc., characterized in that it is further provided with an adsorbent tank that adsorbs and removes agricultural chemicals, etc. contained in the collected water by passing collected water from a water collecting pipe. 8. The pesticide purification equipment for golf course greens, etc. according to claim 7, wherein the adsorbent is activated carbon.

Claims (1)

[Claims] 1. Agricultural chemicals contained in water permeating underground from the grass vegetation layer of the green and/or teeing ground of a golf course are adsorbed and removed by an adsorbent layered or dispersed in the ground. A method for purifying pesticides, etc. on golf course greens, etc. 2. A ground structure for a golf course green, etc., characterized in that an easily permeable layer and an adsorbent layer are laminated and provided below the grass vegetation layer of the golf course green and/or teeing ground. 3. In claim 2, a water collection pipe and an impermeable layer that prevents water from penetrating downward from the installation position of the water collection pipe are provided below the laminated layer of easily water permeable layer and adsorbent layer. The ground structure of golf course greens etc. is characterized by: 4. A ground structure at a golf course, characterized in that a highly permeable layer containing an adsorbent mixed and dispersed is provided below the grass vegetation layer on the green and/or teeing ground of the golf course. 5. Claim 4 provides that a water collection pipe and an impermeable layer that prevents water from penetrating downward from the water collection pipe position are provided below the easily permeable layer in which the adsorbent is mixed and dispersed. The ground structure of greens, etc. of golf courses is a characteristic feature. 6. The ground structure at a golf course green or the like according to any one of claims 2 to 5, wherein the adsorbent is activated carbon. 7. A water collection pipe and an impermeable layer that prevents water from penetrating downward from the water collection pipe position are installed below the permeable layer provided under the grass vegetation layer of the green and/or teeing ground of the golf course. 1. Pesticide purification equipment for golf course greens, etc., characterized in that it is further provided with an adsorbent tank that adsorbs and removes agricultural chemicals, etc. contained in the collected water by passing collected water from a water collecting pipe. 8. The pesticide purification equipment for golf course greens, etc. according to claim 7, wherein the adsorbent is activated carbon.