JP2003171215A - Fulvic acid-containing material, fulvic acid-containing composition, plant-activating agent, method for producing fulvic acid-containing material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To produce fulvic acid more promoting the growth of plants than conventional fulvic acid produced from humic substances, in a more sufficient amount than humic substances contained in underground water in good productivity. <P>SOLUTION: This fulvic acid-containing substance is characterized by having a nitrogen content of ≥0.6 wt.% based on the total amount of carbon, hydrogen, nitrogen, sulfur and oxygen. The fulvic acid-containing substance is characterized by having an aromatic carbon content of 19% determined by<SP>13</SP>C-NMR and an aliphatic carbon content of ≥30% determined by<SP>13</SP>C-NMR. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fulvic acid-containing material mainly containing fulvic acid, a fulvic acid-containing composition mainly containing fulvic acid, and a plant vitalizing agent mainly by the action of fulvic acid.
And a manufacturing method thereof.

[0002]

2. Description of the Related Art In the natural world, when a plant dies, it decays into a humic substance. The main component of humic substances is high-molecular organic acids, and humic substances are widely distributed in soil, lakes, rivers, seabeds, etc., and are abundantly contained in peat, brown coal and weathered coal. Humic substances are natural resources with a wide range of applications, which are closely related to plant growth, mineral transitions and sedimentation.

Humic substances are roughly classified into humic acid and fulvic acid. Humic acid generally has a molecular weight of tens of thousands and is soluble in an alkaline aqueous solution, and fulvic acid generally has a molecular weight of several thousand and is soluble in an acidic aqueous solution. In addition, the exact definition of humic substances is the International Humic Substances Association (International Humic Substances).
c Substances Society, IHSS
Abbreviated as)). And, among these humic substances, fulvic acid is known to have a high plant growth promoting effect (for example, Kinhotsuru, Nishizaki Hata and Yamaguchi Tatsuaki, Chiba Institute of Technology, Research Report, Volume 46, 123-130, 1999).

However, since the main component of humic substances contained in peat, lignite, weathered coal and the like is humic acid, fulvic acid is purified from these substances and used in a sufficient amount as a plant growth agent. In some cases, it was difficult to obtain fulvic acid, and the production cost of fulvic acid was sometimes high.

On the other hand, it is known that humic substances may be contained not only in the sedimentary layers as described above but also in groundwater (for example, S. Nagao, Y.
Nakaguchi, N .; Fujitake and H.M. O
Gawa, 10th IHSS Society Proceedings, Volume 2, Volume 1
143-1146, 2000), it is expected that humic substances contained in groundwater will become a new raw material for fulvic acid.

[0006]

However, a method for inexpensively producing sufficient amount of fulvic acid from humic substances contained in ground brackish water has not yet been known, and fulvic acid obtained from ground brackish water promotes plant growth and the like. It is not yet known that it has a sufficient effect of.

[0007] In recent years, the concentration of agriculture has further advanced,
Conventional plant growth agents produced from humic substances may not be sufficiently effective, and there is a demand for higher activity plant growth agents.

[0008] Furthermore, in order to secure a sufficient yield in intensive agriculture, a plant vitalizing agent having not only a growth promoting effect on plants, but also an effect of promoting germination and imparting disease resistance, and a bactericidal effect is required. It's being done.

[0009]

According to the present invention for solving the above-mentioned problems, the nitrogen content in the total amount of carbon, hydrogen, nitrogen, sulfur and oxygen is 0.6% by mass or more. A fulvic acid-containing material is provided.

Further, according to the present invention, an aromatic carbon content as determined by ¹³ C-NMR is 19% or less, ¹³
Aliphatic carbon content determined by C-NMR is 30%
A fulvic acid-containing material characterized by the above is provided.

These fulvic acid-containing substances include a step of concentrating ground brackish water, a step of acidifying the liquidity of the concentrated ground brackish water, and a step of purifying fulvic acid from the acidic water with a porous adsorbent. It can be manufactured by the method comprising.

Further, these fulvic acid-containing substances include a step of degassing and oxidizing ground brine to obtain secondary ground brine, a step of concentrating the secondary ground brine, and a step of concentrating the secondary ground brine. It can be produced by a method comprising a step of acidifying the liquidity and a step of purifying fulvic acid from the secondary acidic water with a porous adsorbent.

By adopting such a method, a sufficient amount of fulvic acid-containing material can be produced at a lower cost than humic substances contained in groundwater, and the obtained fulvic acid-containing material is sufficient for promoting plant growth. It has various effects.

The fulvic acid-containing product according to the present invention not only has a growth promoting action on plants, but also promotes germination, disease resistance, drought resistance, photosynthesis, metabolism, It is considered to have effects such as activation of plant enzymes and bactericidal action, and is useful as a plant vitalizing agent.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.

The fulvic acid-containing material of the present invention has a higher nitrogen content than conventional fulvic acid-containing materials. Therefore, the fulvic acid-containing material of the present invention is considered to have high activity as a plant vitalizing agent, and from this viewpoint, the nitrogen content in the total of carbon, hydrogen, nitrogen, sulfur and oxygen is 0.6 mass. % Or more, more preferably 1% by mass or more, 1.2% by mass
The above is more preferable, and 2% by mass or more is the most preferable.

The fulvic acid-containing material of the present invention has a low carbon content and a high hydrogen content as compared with the conventional fulvic acid-containing material. Therefore, the fulvic acid-containing material of the present invention is considered to have high activity as a plant vitalizing agent, and from this viewpoint, the carbon content in the total of carbon, hydrogen, nitrogen, sulfur and oxygen is 60% by mass or less. Is more preferable, 45% by mass or less is more preferable, 43% by mass or less is further preferable, 41% by mass or less is the most preferable; 2% by mass or more of hydrogen content is preferable, 3% by mass or more is more preferable,
3.4% by mass or more is more preferable, and 4% by mass or more is most preferable.

A low carbon content and a high hydrogen content mean a low aromatic content and a high aliphatic content. Therefore, the fulvic acid-containing material of the present invention is considered to have high activity as a plant vitalizing agent,
From this viewpoint, the mass ratio of hydrogen to carbon (hydrogen content mass / carbon content mass) is preferably 0.05 or more,
0.09 or more is more preferable, and 0.1 or more is further preferable.

The content of each element can be determined by an elemental analysis method. For example, CHN C manufactured by Yanaco Co.
Measured using ORDER MT-5, and if necessary,
Calculate by subtracting dry ash.

The low content of aromatic components and the high content of aliphatic components can be quantified spectroscopically.
From this viewpoint, the aromatic carbon content determined by ¹³ C-NMR is 19% or less, more preferably 17% or less, further preferably 15% or less, while the aliphatic carbon content determined by ¹³ C-NMR is The carbon content is 30% or more,
35% or more is more preferable, 40% or more is further preferable, and 45% or more is the most preferable.

¹³ C-NMR is, for example, Bruker
It can be measured by CP / MAS using AMX-400 manufactured by the company, and the aromatic carbon content determined by ¹³ C-NMR means the peak area of 110 to 150 ppm relative to the sum of the peak areas of 0 to 230 ppm. It is the ratio of the sum, and the aliphatic carbon content determined by ¹³ C-NMR is 0 to 5 relative to the sum of the peak areas of 0 to 230 ppm.
It is the ratio of the sum of the peak areas of 0 ppm.

From the viewpoint that the aromatic carbon content is low, 110 to 1 on the chart of ¹³ C-NMR.
It is preferred that no dominant absorption of baseline noise is observed in the 50 ppm region.

For the fulvic acid-containing material as described above, a ground brackish water rich in humic substances and having specific characteristics is selected, the ground brackish water is concentrated, and the obtained concentrated ground brackish water is acidified to be acidic, By adopting a method of purifying fulvic acid from the obtained acidic water using a column packed with a porous adsorbent, it can be produced at a practical level for the first time.

Groundwater refers to groundwater having a higher salinity concentration than fresh water, for example, seawater blocked in the ground due to crustal deformation, groundwater containing salt eluted from the surrounding formation, spring water having a high salt concentration, Hot spring water with high salt concentration can be used. However, the ground brackish water as a raw material is preferably one containing a large amount of humic substances, and the ground brackish water containing a large amount of humic substances is generally colored.

Therefore, the humic mass in groundwater can be quantified spectroscopically as chromaticity. For example, J
The dominant wavelength of chromaticity measured according to IS K 0102 is preferably 550 to 600 nm. The stimulation purity at the dominant wavelength is preferably 5% or more, more preferably 10% or more, still more preferably 15% or more. on the other hand,
70% or less is preferable, 60% or less is more preferable, and 5
0% or less is more preferable.

[0026] The content and concentration of the ground brackish water greatly vary depending on the region where it is produced. Also, in the case of underground brackish water produced from the same area, the inclusions and the concentrations of the inclusions differ greatly depending on the depth of sampling. Therefore, in order to obtain a fulvic acid-containing substance of sufficient quality with sufficient productivity, it is necessary to carefully select the ground brackish water to be used.

Among the above-mentioned ground brackish water, most of the humic substances are fulvic acid, and when such ground brackish water is used, the fulvic acid containing substantially only fulvic acid is contained. This is preferable because it can be manufactured at low cost. Specifically, ground brackish water having a fulvic acid content of 70% by mass or more in humic substances is preferable, 80% by mass or more is more preferable, and 90% by mass or more is further preferable.

By producing a fulvic acid-containing material from such underground brackish water by the method of the present invention, the fulvic acid content is preferably 80% by mass or more, more preferably 9% by mass or more.
A fulvic acid-containing substance of 0 mass% or more, and more preferably 95 mass% or more can be obtained with good productivity.

The content of fulvic acid is, for example, IHS.
It can be measured according to the acid fractionation method standardized by S.

In the underground brackish water as described above,
Some contain methane having a saturated solubility or higher, which dissolves in water at 25 ° C. under 0.098 MPa (1 atm), and iodine, 50 mass ppm or higher. Examples of such underground brackish water include brackish water accompanying water-soluble natural gas.

The iodine content can be quantified by a commonly used ion chromatography method or titration analysis method.

When the fulvic acid-containing material is produced from the ground brackish water as described above, the ground brackish water is degassed to remove natural gas components such as methane, and then at least oxidized to remove iodine. By using the obtained secondary underground brine, a fulvic acid-containing material having higher activity as a plant vitalizing agent can be obtained.

The reason for this is not clear, but it is considered that a part of fulvic acid is decomposed during the oxidation treatment to have a low molecular weight and the absorption efficiency for plants is improved. From such a viewpoint, the average molecular weight of fulvic acid is preferably 2000 or less, more preferably 1500 or less, and 1300.
The following are more preferable. The average molecular weight of fulvic acid is
It can be measured by a gel permeation chromatography method, a size exclusion chromatography method, or the like.

It is also considered that another reason is that the low molecular weight compound produced by the decomposition of fulvic acid is involved in the compound produced by further reaction and polymerization.

Further, it is considered that it is due to a chemical reaction such that an active functional group is introduced into fulvic acid and a fulvic acid decomposition product during the oxidation treatment.

In addition, there is a possibility that it is caused by iodine contained in underground brackish water and chlorine used in the oxidation treatment.

Natural type fulvic acid is known as fulvic acid, and natural type fulvic acid is considered to be a reduced type. Further, regenerated fulvic acid is known, and regenerated fulvic acid is considered to be an oxidized type. These fulvic acids are
In addition to the effect as a plant vitalizing agent, it is considered to have a bactericidal effect and an effect of chelating and transporting trace elements.

The fulvic acid-containing material as described above can be produced at a practical level for the first time by adopting a specific method as described below.

First, underground brackish water is concentrated. The concentration ratio is usually 5 times, more preferably 10 times or more, while it is usually 100 times or less, preferably 50 times or less.

As the concentration method, a vacuum evaporation method, an adsorption method,
Membrane separation method, freeze concentration method, solvent extraction method and the like can be mentioned. In particular, as the adsorbent used in the adsorption method, a hydrophobic adsorbent, an ion-exchange type adsorbent, a porous adsorbent such as activated carbon, and the like are preferable because they are expected to have high concentration efficiency and little deterioration of fulvic acid. Further, among the membrane separation methods, the ultrafiltration method, the reverse osmosis filtration method, the diafiltration method and the like are preferable because they are expected to have high concentration efficiency and less deterioration of fulvic acid.

Subsequently, the liquid property of the concentrated underground brackish water is made acidic. As a result, the acid-insoluble humic substance fraction such as humic acid can be separated from the acid-soluble fulvic acid. Specifically, hydrochloric acid, acetic acid, trifluoroacetic acid (TFA), etc. are added to concentrated underground brackish water to adjust the pH to a predetermined value. However, since the added acid is volatile, desalting is easy. Hydrochloric acid is preferable because of its low deterioration of fulvic acid.

The pH is preferably 1 or more from the viewpoint of sufficient fractionation to suppress the deterioration of fulvic acid.
On the other hand, it is preferably 5 or less, more preferably 4 or less, still more preferably 3 or less.

After acidifying the concentrated underground brackish water, acid-insoluble components are removed by filtration and centrifugation, and fulvic acid in acidic water is adsorbed on the porous adsorbent. As the porous adsorbent, for example, XAD resin is used. As a column packed with XAD resin (XAD column), for example, XAD-8 manufactured by Organo Corporation can be used, and a method for purifying fulvic acid using the XAD column is standardized by IHSS.

Thereafter, the fulvic acid is eluted with 0.1 mol / L sodium hydroxide, and the fulvic acid is made sodium-free with an H ⁺ type cation exchange resin, and this is freeze-dried to obtain fulvic acid.

When the raw ground brackish water contains natural gas such as methane and iodine, the ground brackish water is first degassed to remove the natural gas.

Thereafter, the ground brackish water is subjected to an oxidation treatment to remove iodine to obtain a secondary ground brackish water. By the oxidation treatment, iodide ions in underground brackish water are oxidized to iodine molecules and removed. In addition, it is considered that the sterilization treatment is simultaneously performed by performing the oxidation treatment, and the sterilized final product can be obtained.

As a method of oxidation treatment, for example, chlorine water is added. The chlorine concentration in the chlorine water and the amount of chlorine water used are such that the redox potential (ORP) of the ground brine after the chlorine water is added falls within a predetermined range. OR
The value of P is preferably 500 meV or more in order to sufficiently oxidize iodide ions into iodine molecules, and is 60 in order to suppress generation of iodic acid and deterioration of fulvic acid.
0 meV or less is preferable.

Further, as another oxidation treatment method, sulfuric acid and an aqueous solution of sodium hypochlorite are added. By adding sulfuric acid, the optimum ORP range for the oxidation treatment can be widened. In addition, the amount of addition of sulfuric acid and sodium hypochlorite aqueous solution was ORP of 500 after groundwater addition.
Set to ~ 700 meV. As sulfuric acid,
For example, 70% dilute sulfuric acid is used.

The secondary ground brackish water obtained as described above is concentrated in the same manner as in the case of the raw water of the ground brackish water. The concentrated secondary ground brackish water is acidified, and the secondary acidic water is converted to XAD.
Fulvic acid is purified with a porous adsorbent such as a resin to produce a fulvic acid-containing product.

By producing the fulvic acid-containing material from the secondary groundwater by the method as described above, a fulvic acid-containing material having a higher activity as a plant vitalizing agent can be obtained.

The composition containing the fulvic acid-containing substance as a main component, which is produced by the method as described above, is useful as a plant vitalizing agent.

As the form of the composition, an aqueous composition containing a fulvic acid-containing substance in the form of at least one of a solution and a colloid; a dispersion-type composition containing a carrier that supports the fulvic acid-containing substance. A solid composition containing a carrier that supports the fulvic acid-containing material, and the like.

When the fulvic acid-containing composition is a fulvic acid-containing aqueous composition or a fulvic acid-containing dispersion composition, these compositions can be used, for example, as a hydroponic solution and a spraying agent. The concentration of the fulvic acid-containing material in the fulvic acid-containing aqueous composition or the fulvic acid-containing dispersion composition greatly affects the activity as a plant vitalizing agent, and in order to realize sufficient activity, 0.01 mass% ppm or more is preferable, and 0.1 mass p
pm or more is more preferable, and 1 mass ppm or more is still more preferable. On the other hand, in order to avoid the inhibitory effect due to the use of an excessive amount, it is preferably 30% by mass or less, more preferably 1% by mass or less, further preferably 100% by mass or less, and most preferably 50% by mass or less.

When the fulvic acid-containing composition is a fulvic acid-containing solid composition, the composition can be installed and used, for example, on a cultivated land or cultivated land. The concentration of the fulvic acid-containing substance in the fulvic acid-containing solid composition greatly affects the activity as a plant vitalizing agent, and in order to realize sufficient activity, 0.1 mass ppm or more is preferable, and 1 mass ppm or more. Is more preferable and 10 mass ppm or more is still more preferable. On the other hand, in order to avoid the inhibitory effect due to the use of an excessive amount, it is preferably 90% by mass or less, more preferably 80% by mass or less, further preferably 70% by mass or less, and most preferably 50% by mass or less.

Of the fulvic acid-containing compositions, the fulvic acid-containing aqueous composition can be produced by adding a predetermined amount of the fulvic acid-containing composition to water, an aqueous solution or the like.

Further, the fulvic acid-containing aqueous composition can be produced without isolating the fulvic acid-containing substance from underground brine. In this case, the fulvic acid-containing aqueous composition can be produced by a simple method.

For example, from underground brackish water containing at least humic substances, and optionally iodine and methane,
The fulvic acid-containing aqueous composition can be produced by concentrating or diluting ground brackish water so that the concentration of fulvic acid falls within a predetermined range without isolating the fulvic acid-containing substance. If necessary, excess salts and the like may be removed or diluted to reduce the salt concentration.

Before concentrating the ground brackish water containing at least humic substances and optionally iodine, methane, etc., the ground brackish water is degassed to remove natural gas as in the case of the production of the fulvic acid-containing product. To remove iodine and further to oxidize if necessary, to concentrate or dilute the resulting secondary underground brine, remove excess salts, etc. to produce a fulvic acid-containing aqueous composition. You can also

In the fulvic acid-containing material and composition obtained from underground brackish water, there is a possibility that ammonium ions, potassium ions, phosphate ions, etc., including iodine, may remain. It is also considered to act synergistically with fulvic acid.

[0060]

The present invention will be described in more detail with reference to the following examples. Unless otherwise noted, commercially available high purity reagents were used.

(Promotion of growth) Rice seeds (Koshihikari: Or
(Yaza sativa) was germinated and uniformly grown seedlings were selected, and three seedlings were fixed on a polyethylene net placed in a plastic container. The pH of the hydroponic liquid was adjusted to 5.5, and the mixture was grown at 28 ° C. in the light for 2 weeks. Then, the dry mass of the roots was measured, and the effect of promoting growth was evaluated based on a system (control) grown with a hydroponic solution containing no fulvic acid-containing material.

(Photosynthesis) Minolta chlorophyll meter SPAD-5
The amount of chlorophyll was measured using 02 (manufactured by Minolta Camera) to evaluate the photosynthetic ability.

(Metabolism) Respiratory rate was measured using a dissolved oxygen meter (DO-measurement instrument for biochemistry, Oxygraph 9 type) to evaluate metabolic ability.

(Promotion of germination) The promotion of germination was evaluated by germinating Komatsuna seeds under the same conditions and comparing the days until germination.

(Example 1) Fulvic acid-containing material 1, fulvic acid-containing aqueous composition 1 Underground brackish water was collected from 100 to 2100 m underground in Kujukuri district, Chiba prefecture, Japan. This underground brine was colored, the main wavelength of chromaticity was 575 nm, and the excitation purity at 575 nm was 30%. This underground brine is 0.0
It contains methane having a saturated solubility of at least 25 ° C. in water under 98 MPa (1 atm) and iodine of 98 mass ppm, and after collecting underground brackish water, it is brought to normal pressure,
Natural gas mainly composed of methane was generated and degassed.

After degassing, the underground brine was concentrated 20 times using a rotary evaporator, and the pH was adjusted to 1 to 1.5 with hydrochloric acid. The precipitate generated at this time was removed by a filter. Then, according to the IHSS method, fulvic acid was purified using an XAD-8 column manufactured by Organo Corporation and a commercially available H ⁺ cation exchange resin, and lyophilized to obtain a fulvic acid-containing material 1.

When the obtained fulvic acid-containing material 1 was analyzed, the carbon content was 31.7% by mass and the hydrogen content was 3.4.
The mass% and the nitrogen content were 1.2 mass%. Also, fulvic acid is considered to be a natural type.

Further, the obtained fulvic acid-containing material 1 was dissolved in Kasugai hydroponics solution so that the final concentration was 10 mass ppm, to prepare a fulvic acid-containing aqueous composition 1.

When rice was grown using this aqueous composition 1 containing fulvic acid, the dry mass of roots was 2% of that of the control.
It was 40%. Further, by using the fulvic acid-containing aqueous composition 1, the photosynthetic ability and metabolic ability of rice were improved.

Comparative Example 1 Weathered coal (NEI MONGG)
The fulvic acid obtained from U.) had a carbon content of 40.2% by mass, a hydrogen content of 3.3% by mass, and a nitrogen content of 0.5% by mass; ¹³ C-NMR The aromatic carbon content determined by C was 20%, and the aliphatic carbon content determined by ¹³ C-NMR was 23%.

A ¹³ C-NMR chart is shown in FIG. Absorption derived from aromatic carbon is confirmed in the range of 110 to 150 ppm.

When the above-mentioned fulvic acid was dissolved in Kasugai hydroponic solution and the final concentration was used as 10 mass ppm, the dry mass of the root was 120% of the control.

Example 2 Fulvic Acid-Containing Substance 2, Fulvic Acid-Containing Aqueous Composition 2 Natural gas was degassed from the underground brackish water used in the production of the fulvic acid-containing substance 1 and then chlorine water was added to remove iodine molecules. It was removed and used as secondary underground brine.

A fulvic acid-containing material 2 was produced in the same manner as the fulvic acid-containing material 1 using this secondary ground brine. When the obtained fulvic acid-containing product 2 was analyzed, the carbon content was 40.5% by mass, the hydrogen content was 4.3% by mass, and the nitrogen content was 2.2% by mass; by ¹³ C-NMR. The determined aromatic carbon content is 11.2%, ¹³ C-
Aliphatic carbon content determined by NMR is 47.5%
The average molecular weight of fulvic acid was 1200. Also, fulvic acid is considered to be regenerative.

Further, as shown in FIG. 1, on the ¹³ C-NMR chart, no significant absorption was observed in the region of 110 to 150 ppm with respect to the baseline.

The above-mentioned fulvic acid-containing substance 2 was dissolved in Kasugai hydroponic solution to a final concentration of 5 mass ppm to prepare fulvic acid-containing aqueous composition 2.

When rice was grown using this aqueous composition 2 containing fulvic acid, the dry mass of roots was 3% of that of the control.
It was 50%. Further, by using the fulvic acid-containing aqueous composition 2, the photosynthetic ability and metabolic ability of rice were improved.

Example 3 Fulvic Acid-Containing Aqueous Composition 3 The ground brackish water used in the production of the fulvic acid-containing substance 1 was diluted so that the electric conductivity was 1 mS / cm or less, and the fulvic acid-containing aqueous composition 3 was obtained. Was manufactured. By using the obtained aqueous composition 3 containing fulvic acid, germination of Japanese mustard spinach was promoted.

(Example 4) Fulvic Acid-Containing Aqueous Composition 4 The underground brine used in the production of the fulvic acid-containing substance 1 was concentrated 20 times to remove precipitated salts, and the electric conductivity was 1 mS.
A fulvic acid-containing aqueous composition 4 was produced by diluting the aqueous solution to a concentration of not more than / cm. By using the obtained fulvic acid-containing aqueous composition 4, germination of Japanese mustard spinach was promoted.

[0080]

The fulvic acid-containing material having a nitrogen content of 0.6% by mass or more in the total amount of carbon, hydrogen, nitrogen, sulfur and oxygen, and the aromatic carbon content determined by ¹³ C-NMR are By using a fulvic acid-containing material having an aliphatic carbon content of 19% or less and determined by ¹³ C-NMR of 30% or more, not only the growth of plants is promoted,
It can promote germination, improve disease resistance, improve drought resistance, promote photosynthesis, promote metabolism, and activate plant enzymes.

[Brief description of drawings]

FIG. 1 is the ¹³ C-NMR measurement result of the fulvic acid-containing product of the present invention.

FIG. 2 is a result of ¹³ C-NMR measurement of conventional fulvic acid.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akira Sakuma             3-20 Nihonbashi Muromachi, Chuo-ku, Tokyo             Kanto Natural Gas Development Co., Ltd. (72) Inventor Hideyuki Yamaguchi             3-20 Nihonbashi Muromachi, Chuo-ku, Tokyo             Kanto Natural Gas Development Co., Ltd. (72) Inventor Masaomi Sato             3-20 Nihonbashi Muromachi, Chuo-ku, Tokyo             Kanto Natural Gas Development Co., Ltd. F-term (reference) 2B022 EA01                 4H011 AB03 BB20 DA13 DD01 DD04                       DG06                 4H061 AA01 AA02 CC58 DD11 GG22                       GG29 LL02 LL03 LL12 LL26

Claims (18)

[Claims] 1. A fulvic acid-containing product, wherein the nitrogen content in the total of carbon, hydrogen, nitrogen, sulfur and oxygen is 0.6% by mass or more. 2. The mass ratio of the hydrogen to the carbon is
The fulvic acid-containing product according to claim 1, which is 0.05 or more. 3. A fulvocarbon having an aromatic carbon content determined by ¹³ C-NMR of 19% or less and an aliphatic carbon content determined by ¹³ C-NMR of 30% or more. Acid inclusions. 4. The fulvic acid-containing product according to claim 1, which is obtained from a humic substance in ground brackish water and contains substantially only fulvic acid. 5. The dominant wavelength of the chromaticity of the underground brine is 550.
˜600 nm, and the excitation purity at the dominant wavelength is 5 to 70
%, And the fulvic acid-containing product according to claim 4. 6. The fulvic acid-containing product according to claim 4, wherein the content of fulvic acid in the humic substance of the ground water is 70% by mass or more. 7. The ground brine is 0.098 MPa.
The fulvic acid-containing product according to any one of claims 4 to 6, which contains methane having a saturated solubility in water at 25 ° C under (1 atm) or more and iodine in an amount of 50 mass ppm or more. 8. The fulvic acid-containing product according to claim 4, wherein the fulvic acid-containing material is produced from a secondary ground brackish water obtained by at least oxidizing the ground brackish water after degassing. 9. The fulvic acid-containing product according to claim 8, wherein the fulvic acid has an average molecular weight of 2000 or less. 10. The fulvic acid is at least one of a natural type and a regenerated type.
10. The fulvic acid-containing product according to any one of 9 to 9. 11. A fulvic acid-containing composition comprising the fulvic acid-containing material according to any one of claims 1 to 10 as a main component. 12. An aqueous composition containing the fulvic acid-containing material in the form of at least one of a solution and a colloid, or a dispersion composition containing a carrier supporting the fulvic acid-containing material. The fulvic acid-containing composition according to claim 11, which is a solid composition containing a carrier that supports the fulvic acid-containing material. 13. The concentration of the fulvic acid-containing substance is 0.0
The fulvic acid-containing aqueous composition or the fulvic acid-containing dispersion composition according to claim 12, which is 1 mass ppm to 30 mass%. 14. The concentration of the fulvic acid-containing substance is 0.1.
The fulvic acid-containing solid composition according to claim 12, wherein the solid content is from ppm to 90% by mass. 15. A plant vitalizing agent comprising the fulvic acid-containing composition according to any one of claims 11 to 14. 16. A method comprising: a step of concentrating underground brackish water; a step of acidifying the liquidity of the concentrated underground brackish water; and a step of purifying fulvic acid from the acidic water with a porous adsorbent. And a method for producing a fulvic acid-containing product. 17. A step of degassing and oxidizing ground brine to obtain secondary ground brine, a step of concentrating the secondary ground brine, and a step of making the concentrated secondary ground brine water acidic. And a step of purifying fulvic acid from the secondary acidic water with a porous adsorbent, the method for producing a fulvic acid-containing product. 18. The method for producing a fulvic acid-containing product according to claim 17, wherein the oxidation treatment is performed by adding chlorine water or by adding sulfuric acid and an aqueous solution of sodium hypochlorite. .