JPH0630654A - Production of water nonrepellent soil conditioning material - Google Patents

Abstract

PURPOSE:To obtain a water nonrepellent soil conditioning material being effective and safe for a long period of time for vegetation of dried land, etc. CONSTITUTION:Water repellency of peat is checked by treating part with an aqueous solution of a dialkylsulfosuccinate such as sodium diisobutylsulfosuccinate, sodium dihexylsulfosuccinate, sodium dioctylsulfosuccinate, sodium bistridecylsulfosuccinate, sodium dicyclohexylsulfosuccinate or sodium diamylsulfosuccinate or an alkylarylsulfonate such as sodium diisopropylnaphthalenesulfonate to produce a water nonrepellent soil conditioning material 3. The water nonrepellent soil conditioning material improves soil in the form of mixing with surface layer part 2a of fundamental soil 2 and raises water retaining power of the soil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a non-water repellent soil improving material suitable for vegetation and greening in arid areas.

[0002]

2. Description of the Related Art Conventionally, in deserted soil, dry land such as sandy land, the loss of water due to evaporation of water and infiltration into the ground is severe. I cannot get enough water for growth. Therefore, in such dry land, in order to artificially irrigate with sprinkler or drip irrigation, or to increase the water retention capacity of such dry soil, polyacrylate and its copolymer, maleic anhydride are used. Attempts have been made to grow plants and to establish them in a dry place by taking measures such as mixing a water-absorbing polymer, which is a copolymer of α-olefin and the like, in a powder state.

[0003]

However, it is extremely difficult to obtain a large amount of clean water as a water source for such artificial irrigation, and when the water evaporation in the surface soil is severe, the surface layer of the soil is The salt in the irrigation water has accumulated in the
Depending on the case, vegetation cannot be applied here within a short period of 1 to 2 years, and a large amount of washing water and drainage facilities are required for its maintenance. Therefore, it is impossible to effectively vegetate a dry land only by artificial irrigation, and it is inevitable that some measure to enhance the water retention capacity of the dry soil is required. . However, the water-absorbing polymer as described above, the water absorption amount is significantly reduced for water containing salts, on the other hand, when 0.3% or more of the water-absorbing polymer is mixed in the soil, the air permeability of the soil is high. It is well known that the degradation of vegetation causes deterioration of the vegetation. Furthermore, the polymer itself is very expensive, and the degradation by sunlight is fast, so the safety of the degradation products to the environment is still unknown. From the viewpoints of the above, etc., there is a concern that appropriate and safe usage standards have not yet been established, and it is natural that full consideration is required when using this. Therefore, it is a natural product and is a publicly recognized peat (i.e., peat, peat moss, grass charcoal, etc., humus soil) that has already been publicly recognized for its soil improving effect, fertilizing effect and safety. (Called Pete in the calligraphy)
If mixed with such dry soil, it is possible to create a soil effective for water supply to plants and maintain it for a long time without doubt, its safety. A proposal was made. However, since peat is a vegetable fiber that is in the process of carbonization as is known, peat in a dry state, which is in a dry state in the sun etc., has extremely high water repellency, especially in terms of distribution characteristics as a product. Therefore, if you do not perform pretreatment such as adding water over a period of several days in advance to raise the water content to a specified value (for example, 60% or more), mix it in dry soil. However, there is a problem that the effective water retention effect cannot be obtained, and it is substantially difficult to perform such pretreatment during soil preparation work in a dry land. In view of the above circumstances, the present invention is effective and safe over a long period of time, so that a soil suitable for vegetation can be created without burdening the soil creation work even in a dry land, improving non-water repellent soil A method for manufacturing a material is provided.

[0004]

That is, the present invention is constituted by using an aqueous solution containing a dialkylsulfosuccinate to suppress the water repellency of the peat. Further, the peat is constituted by using an aqueous solution containing an alkylallyl sulfonate so as to suppress the water repellency of the peat. The numbers in () are
It is to be understood that the corresponding elements in the drawings are shown for convenience and the present description is not limited to the description of the drawings. The same applies to the following action columns.

[0005]

With the above-mentioned constitution, the non-water repellent soil improving material produced by the present invention has the peat water repellency suppressed,
Acts to exert hydrophilicity.

[0006]

EXAMPLES Table 1 shows an example of a water repellent treatment agent used to inhibit the water repellency of peat, Table 2 shows another example of the water repellent treatment agent, and Table 3 shows the present invention. A table showing the hydrophilicity test results of the produced non-water repellent soil improvement material, FIG.
2 is a semi-logarithmic graph showing the results of the hydrophilicity test shown in FIG.
FIG. 4 is a diagram showing an example of soil improvement on a dry slope using a non-water repellent soil improvement material produced by the present invention.

The non-water repellent soil improver produced by the present invention is composed of peat (hereinafter referred to as peat in the present specification) made of humus soil called peat moss or grass charcoal as a raw material, Pete, as a product distribution unit, dried to some extent, in a form that has been subjected to compression molding, that is, fine powder, coarse powder, granules, pellets, string,
It is formed into an appropriate shape such as a net shape, a sheet shape, or a mat shape, and is supplied in the form of being piled up in bulk or packed. The peat that constitutes the non-water repellent soil improver is surface- and permeation-treated with a water repellent treatment agent that suppresses its water repellency and increases hydrophilicity. A dialkylsulfosuccinate composed of an alkyl group selected from octyl, cyclohexyl, isobutyl, decyl, amyl and the like and salts selected from sodium, potassium and the like is used.
More specifically, as a dialkyl sulfosuccinic acid,
As shown in Table 1 shown below, sodium diisobutylsulfosuccinate, sodium dihexylsulfosuccinate, sodium dioctylsulfosuccinate, sodium bistridecylsulfosuccinate, sodium dicyclohexylsulfosuccinate, sodium diamylsulfosuccinate, or the like is used. As another example of the water repellent deterrent treating agent for treating peat, an alkylallyl sulfonic acid comprising an alkyl group similar to that constituting the dialkyl sulfosuccinate and an allyl group selected from phenyl, naphthalene, etc. A salt is used, and more specifically, sodium diisopropylnaphthalene sulfonate or the like is used as the alkylallyl sulfonate as shown in Table 2 below. These water repellent treatments have been confirmed to be safe, that is, all of the treatments shown in Tables 1 and 2 are approved for use by the US Food and Drug Administration (FDA). The safety of the water repellent deterrent treatment agent used for deterring the water repellency of peat is secured.

[Table 1]

[Table 2] Further, the non-water repellent soil improver produced by the present invention is kneaded with magnesia lime, slaked lime, etc. in a predetermined ratio for adjusting the pH of peat. That is, peat without any treatment for adjusting the pH, addition, etc. is generally known to be acidic, for example, about pH 3 to 5, but soil improvers are mixed in the soil to be improved. Before
By adding and kneading such limes, the pH is adjusted to, for example, 6 to 8.

In the production of a non-water repellent soil improver, in order to suppress the water repellency of peat by using a water repellent inhibitor such as dialkylsulfosuccinic acid or alkylallyl sulfonate as described above, for example, soil amendment is used. The peat in a dry state as a product for lumber is subjected to surface and permeation treatment in a form of passing through the aqueous solution of the water repellent inhibiting agent. For example, the water repellent deterrent treatment has a concentration of 0.01-10%.
In a state of aqueous solution of a certain degree, by immersing peat in the water-repellent inhibiting treatment agent which is in the aqueous solution state, or by spraying the treatment agent aqueous solution to the peat, to pass through the treatment agent solution, Apply water repellent suppression treatment. Then, the peat before the water-repellent treatment is highly water-repellent by nature because it is a vegetable fiber that is in the process of carbonization, and especially peat dried in the sun or the like has extremely strong water-repellency. It is known that the water repellency suppressing treatment described above suppresses the water repellency that Pete originally possesses, and in lieu of this, it becomes more hydrophilic.
The peat may be treated to suppress its water repellency in a dry state or a wet state as a raw material, or in an appropriate shape (granular form) suitable for distribution as a peat product. , Pellet-shaped, string-shaped, sheet-shaped, etc.) before or after processing, but at least before the water-repellent inhibiting treatment is completed before being mixed into the basic soil to be improved. .

In order to numerically represent the hydrophilicity of the non-water-repellent soil amendment and improver produced according to the present invention, a peat treated with a water-repellent inhibiting treatment with sodium dihexylsulfosuccinate and sodium dioctylsulfosuccinate shown in Table 1 was used. Table 3 shows the results of hydrophilicity tests of several test pieces prepared using peat that was not subjected to any water repellent treatment.

[Table 3] The test method is that the peat with a water content of 45% is treated with 0.5% of sodium dihexylsulfosuccinate or
Specimens A1 and A2 immersed in a 1.0% aqueous solution, specimens B1 and B2 immersed in a 0.1% or 0.5% aqueous solution of sodium dioctylsulfosuccinate, and simple peat specimens without any water repellency inhibiting treatment. Sample C 5
Prepare 5 kinds of specimens, these 5 kinds of specimen A1,
A certain amount of each of A2, B1, B2, and C was packed in a tea bag and immersed in pure water, and the water absorption amount with respect to the water immersion time (water absorption weight with respect to peat absolute dry weight) was measured. In addition, each specimen A1, A2, B1 after immersion treatment,
The water content of B2 and C was 40%. As a result, in this test, when the water absorption at the time when the water immersion time of 1 day has passed is regarded as the maximum saturated water absorption, the maximum saturated water absorption is the sample A1,
A2, B1, and B2 are both twice as large as the sample C,
In addition, the specimens A1, A2, B1 and B2 required only 10 seconds to reach the maximum saturated water absorption. As shown in FIG. 1, the hydrophilicity test results shown in Table 3 are compared with each other in the form of semi-logarithmic representation of the water immersion time in the X-axis direction. Specimen A that was treated to suppress water repellency by being immersed in one of the aqueous solutions
1, A2, B1 and B2 are all Line1 in FIG.
On the other hand, the mere Pete specimen C is
Follow ne2. As is clear from this, the specimens A1, A2, B1, and B2 made of peat subjected to the water-repellent inhibition treatment
Is superior in both the elapsed time up to the water absorption start time and the maximum amount of water supply, compared to the sample C made of peat that has not been subjected to any water repellent treatment, that is, that peat is subjected to a water repellent treatment. It was found that the non-water repellent soil improver obtained by the above method exhibits a markedly hydrophilic property. The test results shown in Table 3 are obtained by comparing the hydrophilicity of the sample using sodium dihexylsulfosuccinate or sodium dioctylsulfosuccinate as the water repellent inhibitor for peat with the hydrophilicity of the simple peat sample. However, as the water repellent deterrent treatment agent for producing non-water repellent soil, for example, an aqueous solution containing a dialkylsulfosuccinate or an alkylallylsulfonate shown in Table 1 or Table 2 is used. It has been confirmed by the same test that even if it is used, the water repellency of peat is suppressed in the same manner as the result of the hydrophilic test.

Therefore, in order to improve soil by using the non-water repellent soil improver produced by the present invention, for example, on a dry sloped land such as a sandy soil suitable for vegetation, as shown in FIG.
This is performed in the form of arranging the soil improving material 3 on the surface layer portion 2a of the basic soil 2 of the dry slope land 1, and thereby,
The water retention property of the surface layer portion 2a is increased. That is, using the non-water repellent soil improver produced by the present invention, the fine soil, coarse powder, and granular soil improver 3 is applied to the surface layer portion 2a.
Of the improvement material 3 formed into a string or a net in a form of being mixed with the sand ground constituting the above, or seeded with the pellet-shaped improvement material 3 or covering the basic soil 2. The soil improving material 3 is arranged on the surface layer portion 2a by expanding and fixing, laying the improving material 3 formed in a sheet shape or a mat shape, or by any other appropriate method. In this way, the well-known drip irrigation is applied to the basic soil 2 of the inclined dry land 1 to form the perforated pipe 5
When the water 6 for irrigation is supplied to the surface layer portion 2a through the water, the water 6 is dripped into the surface layer portion 2a from the hole 5a of the perforated pipe 5. Then, the surface layer portion 2 is treated with a water repellent treatment such as a dialkyl sulfosuccinate or an alkyl allyl sulfonate to suppress the water repellency of the peat so that the soil improving material has a significantly hydrophilic form. From the place where 3 is mixed, the water 6 permeates underground from the surface layer portion 2a shown in the lower part of FIG. 2 or evaporates by the sun through the gaps between the sand particles constituting the basic soil 2. The water 6 is retained there without being lost due to the water-repellent-inhibiting peat that constitutes the soil conditioner 3 without losing water. As a result, the surface layer portion 2a of the basic soil 2 has a much higher water retention than before soil improvement, and a soil suitable for plant growth is formed here, whereby the sloped dry land 1 Is effective for vegetation by artificial irrigation in addition to natural rainfall (that is, water replenishment for plants) and soil improvement of the surface layer portion 2a of the basic soil 2 (that is, property improvement on the soil side as a plant growth base). Stable soil conditions can be maintained over a long period of time.

As described above, the peat which constitutes the soil improving material 3 is a natural peat, which suppresses the water repellency which the peat originally has, that is, the hydrophilic property of the improving material 3. Since the water repellent deterrent treatment agent used for increasing the safety is also officially recognized as the safety, the soil improving material 3 can be used depending on the environmental conditions of the area such as the slope dry land 1 where the soil should be improved. It is completely safe with no risk of inducing environmental pollution, etc. Further, in order to improve the ground so that the basic soil 2 is suitable for vegetation, it is sufficient to simply mix the soil improving material 3 with the surface layer portion 2a thereof, and thus, the soil improving material 3 is previously flooded in the inclined dry land 1 for a predetermined time. Since it is not necessary to perform complicated water increase treatment such as, it is possible to perform efficient soil improvement in soil preparation work. It should be noted that the soil improving material 3 once mixed with the surface layer portion 2a of the basic soil 2 and supplied with the water 6 is always slightly discharged because the water repellency originally held by Pete is removed from the surface portion thereof. The improvement material 3 can supply sufficient water for the growth and maintenance of the plant while retaining the water content of the plant, that is, having spring water, and at the same time, the humus component originally possessed by Pete is added to the plant. It can also be used as a fertilizer to effectively produce fertilizer.

In addition, when improving the soil of the basic soil 2,
When the soil improving agent 3 is mixed in the surface layer portion 2a, a known soil improving agent such as vermiculite, perlite, bentonite, zeolite or charcoal is added and mixed into the sand ground constituting the surface layer portion 2a. Alternatively, these known soil improvers may be added and mixed into the soil improver 3 according to the present invention in advance. It is needless to say that a known inorganic or organic fertilizer, a water-absorbing polymer or the like may be appropriately added and used in the surface layer portion 2a of the basic soil 2. In the examples, the soil conditioner 3
Has described an example of using this by adjusting the pH by adding and kneading young soil lime, slaked lime, etc., but when applied to plants that do not dislike acidity, or in alkaline soil, even without using pH adjustment Of course good things. In addition, when the soil improving material according to the present invention is used to improve the basic soil 2 and the like of the dry sloping land 1, it is not always necessary to use the above-mentioned drip irrigation together, for example, relying only on natural rainfall, or other There is no problem even if the artificial irrigation method of is used. Furthermore, the non-water repellent soil improver produced by the present invention,
Its application is not limited to sandy soils on dry slopes, but poor desertification or steep slopes, hard soils, or other natural rainfall, where water loss due to water evaporation or infiltration into the ground is severe. Even if it is applied to an area where the plant cannot obtain sufficient water absorption for its growth,
The same effect as described above, that is, the soil effective for vegetation and safe for a long period of time can be easily obtained without burdening the construction work.

[0013]

As described above, according to the present invention, peat is constituted by using an aqueous solution containing a dialkylsulfosuccinate so as to suppress the water repellency of the peat. The non-water repellent soil improver can exhibit hydrophilicity by suppressing the water repellency of peat. Therefore, if the non-water repellent soil improving material produced by the present invention is mixed in the surface layer portion 2a of the basic soil 2 which is the soil to be improved in the vegetation difficult area such as the slope dry land 1, the soil Since the water retention capacity can be increased, soil suitable for vegetation can be easily formed even in a dry land without burdening the soil preparation work. Then, the dialkyl sulfosuccinate used to suppress the water repellency of peat in the production of the non-water repellent soil improver is that the safety has been approved, and thus the soil was improved by the non-water repellent soil improver. The soil is a safe soil that is effective for vegetation for a long period of time and has no fear of environmental damage. In addition, when peat is used for soil improvement, it is not necessary to preliminarily increase the water content of the peat, which enables economical construction work, and at the same time as the soil improvement, peat possesses It is possible to feed fertilizer as humus soil to the soil to be improved and to make this soil rich in nutrients, and as a result, soil with improved water retention capacity by non-water repellent soil improver. It is possible to provide high-quality nutrient-rich soil in which fertilizer is stored in the interstices of particles to difficult-to-vegetate areas. Further, even if the peat is constituted by using an aqueous solution containing an alkylallyl sulfonate so as to suppress the water repellency of the peat, the same effect as described above can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a semilogarithmic graph of the hydrophilicity test results shown in Table 3.

FIG. 2 is a diagram showing an example of soil improvement on a dry slope using a non-water repellent soil improving material produced by the present invention.

[Explanation of symbols]

 1 …… Slope dry land 2 …… Basic soil 3 …… Soil conditioner

Claims (2)

[Claims] 1. A method for producing a non-water repellent soil improver, wherein peat is used in an aqueous solution containing a dialkylsulfosuccinate to suppress the water repellency of the peat. 2. A method for producing a non-water repellent soil improver, which comprises using an aqueous solution containing an alkylallyl sulfonate to suppress the water repellency of the peat.