JP2005048147A - Agent for decontaminating/conditioning combined-contaminated soil and decontaminating and conditioning agent for combined-contaminated soil and stabilizing and decontaminating agent for combined-contaminated soil and decontamination method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combined-contaminated soil-decontaminating/conditioning agent, a combined-contaminated soil-decontaminating/conditioning method, a soil-conditioning and decontaminating method and combined-contaminated soil-stabilizing and decontaminating method that can penetrate/adsorb/decompose and make harmless the following substances: harmful heavy metals; Cd, hexavalent Cr, Hg, As, P, Pb, Cu, Se, B, dioxins, PCB; VOCs (dichloroethane, carbon tetrachloride, trichloroethylene, tetrachloroethylene, benzene and other 10 kinds) and oils (crude oil, gasoline, lubricant oil, heavy oil) only by mixing the agent to the combined-contaminated soil and stirring the mixture. <P>SOLUTION: The decontaminating agent and conditioning agent are added to the contaminated soil in the following order and the following contents: 1st, 25 to 40 % of natural zeolite; 2nd, 1 to 15 % of artificial zeolite; 3rd, 15 to 30 % of carbonized carbon; 4th, 1 to 15 % of activated carbon; 5th, 15 to 30 % of carbonized pulp sludge; 6th, 5 to 20 % of chaff activated carbon; 7th, 1 to 10 % of titanium oxide; 8th, 5 to 25 % of aluminum sulfate; 9th, 1 to 10 % of sodium carbonate; 10th, 15 to 30 % of bentonite; and 11th, 5 to 15 % of calcium hydroxide. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a composite contaminated soil purification / improving agent (abbreviation: DMC = Dia Melt Clear) and a compound contaminated soil improving / purifying agent (abbreviation: CIC = complex solution / improvement / clip application) as well as complex contamination soil stable purification. Heavy metals, dioxins, PCBs and VOCs (dichloroethane, carbon tetrachloride, trichlorethylene, tetrachloroethylene, benzene, etc.) using a chemical agent (abbreviation: CSC = complex solution stabilizer stabilizer) This is related to the purification / improvement method and the soil improvement purification method and the stable purification method of complex contaminated soil containing harmful substances such as oils (crude oil, gasoline, lubricating oil, heavy oil).

  In addition, it was created by blending various inorganic functional substances, and by mixing the contaminated soil with a powder purifying agent that maximizes each function, demonstrates multi-functionality, and purifies harmful substances. Hazardous heavy metals such as cadmium, hexavalent chromium, mercury, arsenic, phosphorus, lead, copper, selenium, boron, PCBs and VOCs (dichloroethane, carbon tetrachloride, trichloroethylene, tetrachloroethylene, Benzene, 10 other types) and oils (crude oil, gasoline, lubricating oil, heavy oil) are intended to be harmless by permeating, adsorbing and decomposing.

Numerous inventions of soil amendment materials and soil amendment methods for improving and purifying soil contaminated with toxic heavy metals such as cadmium, lead, hexavalent chromium, arsenic, and mercury are provided.
Japanese Patent No. 2508903 Japanese Patent No. 3215065 Japanese Patent No. 3291634 JP 2002-18413 A JP 2002-18421 A JP 2002-355665 A JP 2002-59150 A Japanese Patent Laid-Open No. 10-8029 JP 2002-334135 A

  However, each of the above disclosed inventions includes hexavalent chromium (Patent No. 2508903, JP 2002-18413), arsenic (Patent No. 3215065, JP 2002-18421), mercury (Patent No. 3916463, JP, 2003-102464), cadmium (JP 2002-355665), and selenium (JP 2002-59150), a single heavy metal is removed. In addition, lead, arsenic, mercury, cadmium, hexavalent chromium (Japanese Patent Laid-Open No. 10-8029), lead, arsenic, mercury, cadmium, hexavalent chromium, selenium (Japanese Patent Laid-Open No. 2002-334135), etc. Some are intended to remove multiple heavy metals, but they are not intended to remove anything close to all heavy metals. Moreover, the improvement processing material used for the removal of these toxic heavy metals employs a method of adding water and kneading.

  Therefore, the present invention is provided in order to solve the conventional problems and to solve the object of the invention.

  In the first aspect of the present invention, in the purification / improving agent for complex contaminated soil, the blending order and blending ratio of the purifying agent and the modifying agent for the contaminated soil are firstly natural zeolite 25-40%, second is artificial zeolite 1 15%, 3rd carbonized carbon 15-30%, 4th activated carbon 1-15%, 5th carbonized pulp sludge ash 15-30%, 6th rice husk activated carbon 5-20%, 7th titanium oxide 1 -10%, 8th-Aluminum sulfate 5-25%, 9th sodium carbonate 1-10%, 10th bentonite 15-30%, 11th slaked lime 5-15% .

  The second aspect of the present invention is a composite polluted soil improvement purifier, wherein the blending order and blending ratio of the improved purifier with respect to the contaminated soil are firstly carbonized pulp sludge ash 25 to 40%, and secondly natural zeolite 10 to 30%. 3rd artificial zeolite 5-15%, 4th activated carbon 5-15%, 5th silica 1-10%, 6th titanium oxide 1-10%, 7th aluminum sulfate 5-25%, 8 Secondly, sodium carbonate 1-10%, 9th bentonite 5-20%, and 10th slaked lime 1-10%.

  The third aspect of the present invention is a composite contaminated soil stabilizing agent, wherein the blending order and blending content of the stabilizing agent with respect to the contaminated soil are firstly pulp sludge ash 25 to 50%, secondly artificial zeolite 5 to 15%, 3rd activated carbon 5-15%, 4th cement 5-25%, 5th silica 1-10%, 6th calcium sulfate 1-10%, 7th titanium oxide 1-10%, 8th Aluminum sulfate is 5-25%, 9th is sodium carbonate 1-10%, 10th is bentonite 5-20%, and 11th is slaked lime 1-15%.

In the fourth aspect of the present invention, in the purification and improvement method for complex contaminated soil, the mixing order and mixing ratio of the purifying agent and the improving agent to the contaminated soil are firstly natural zeolite 25 to 40%, secondly artificial zeolite 1 to 1 15%, 3rd carbonized carbon 15-30%, 4th activated carbon 1-15%, 5th carbonized pulp sludge ash 15-30%, 6th rice husk activated carbon 5-20%, 7th titanium oxide 1 -10%, 8th-Aluminum sulfate 5-25%, 9th sodium carbonate 1-10%, 10th bentonite 15-30%, 11th slaked lime 5-15% Obtaining a purification / improving agent, storing the purification / improving agent in a spraying machine, and digging up agricultural fields such as paddy fields and fields contaminated with heavy metals with agricultural machinery such as tractors and tillers soil 10m ³ After spraying by the amount of cleaning-improving agent or at a rate of 200Kg (= 2%) from 500Kg (= 5%) the spraying machine, or the like, and stirred again agricultural machinery.

The fifth aspect of the present invention is an improved purification method for composite contaminated soil, in which the blending order and blending ratio of the improved cleaner with respect to the contaminated soil are firstly carbonized pulp sludge ash 25-40%, and secondly natural zeolite 10-30. 3rd, artificial zeolite 5-15%, 4th activated carbon 5-15%, 5th silica 1-10%, 6th titanium oxide 1-10%, 7th aluminum sulfate 5-25%, 8 th 1-10% sodium carbonate, 200 Kg 5 to 20% bentonite to ninth, the tenth to soil improvement purifying agent obtained by mixing stirred at slaked lime 1-10%, relative to 10 m ³ (= 2 %) To 500 kg at a rate of 500 kg from the top of the contaminated soil piled up in advance and mixed and stirred, and the stirred soil is backfilled to the original excavation site.

In the sixth aspect of the present invention, in the stable purification method for complex contaminated soil, the blending order and blending ratio of the stable purifier to the contaminated soil are firstly pulp sludge ash 25 to 50%, and secondly artificial zeolite 5 to 15%. 3rd activated carbon 5-15%, 4th cement 5-25%, 5th silica 1-10%, 6th calcium sulfate 1-10%, 7th titanium oxide 1-10%, 8th 5 to 25% aluminum sulfate, 9 to 1 to 10% sodium carbonate, 10 to 5 to 20% bentonite, and 11 to 1 to 15% slaked lime to obtain a soil stabilizing cleaner. the soil stabilizer cleaning agent at a rate of 500Kg from 200Kg (= 2%) relative to 10 m ^3, were charged into soft ground composed of contaminated soil, and the mixture was stirred at excavating machine such as a backhoe, leveling flooring bulldozed, Rodoro In which was to stabilize the ground while the rolling pressure in error. The order of blending from the first invention to the sixth invention is an important factor, and if this order is changed, a failure reaction occurs and the desired effect cannot be obtained.

  Since the present invention has the above-described configuration, the following effects can be obtained. That is, in the composite contaminated soil purification / improving agent, all of the raw materials are blended by selecting highly functional inorganic functional materials. In addition, the material function "adsorption / ion exchange / catalyst / photocatalytic oxidation-reduction" is maximized, and it is a compound that can fully demonstrate its multifunctionality. The photocatalytic reaction of titanium oxide generates electron (−) reducing power and hole (+) oxidizing power, and reacts with water, oxygen, and the like to generate active oxygen such as OH radicals and superoxide anions. Furthermore, it can be oxidized and reduced by “adsorption / ion exchange / catalyst function” by zeolite and activated carbon, and partly fused and decomposed into carbon dioxide gas, carbon dioxide, water, and chlorine to make them harmless.

Next, in the case of complex contaminated soil improvement and purification agent, by using this, it adsorbs “heavy metals, dioxins, PCBs, VOCs, oils” which are harmful substances, ion exchange, catalyst, It can cause photocatalytic (redox) reaction, decompose and detoxify.
And in the composite contaminated soil improvement purification agent and the composite contamination soil stable purification agent, the inorganic material is the main raw material, the pH value is neutral, and it is friendly to the soil environment. In addition, the application range of the purpose of use is wide, the effect is fast, and it can be used with a simple work procedure.

Next, in the case of complex polluted soil improvement purification agent, by using it, it adsorbs “heavy metals, dioxins, PCBs, VOCs, oils” which are harmful substances, and ion exchange, catalyst, photocatalyst (Oxidation reduction) reaction can be caused, decomposed, and rendered harmless.
In addition, the composite contaminated soil improvement purification agent and the composite contamination soil stable purification agent are artificially prepared at the same time as gas phase adsorption, surface liquid phase adsorption, chemical adsorption on the pore internal surface, and physical adsorption inside the pore. It has the function of destroying (decomposing) and releasing the generated molecular fusion into a molecule that exists normally in nature.
And in the composite contaminated soil improvement purification agent and the composite contamination soil stable purification agent, the inorganic material is the main raw material, the pH value is neutral, and it is friendly to the soil environment.

Regarding the efficiency of the work, excavation, “input / spraying”, agitation, “backfilling / laying”, and rolling of the contaminated soil can be performed without using a special method.
Moreover, since the application range is wide, there is no significant change in the amount added due to changes in the soil to be treated, which is advantageous in terms of process management.
According to the present invention, a purification effect of 50% or more appears in 2 to 3 weeks after construction, and a maximum of 80% or more of purification can be expected after 3 months.
As a result of the pack test, no harmful substances were detected after 10 to 20 seconds.

  According to the present invention, seedling material, soil improvement material, disease prevention agent, yield increasing material, continuous cropping failure prevention material, compost ripening promotion material, cooling damage and drought prevention material, soil detoxification material, harmful gas adsorbing material, water purification material Can be used effectively.

In the above configuration, a special osmosis membrane is formed when the composite contaminated soil improving purification agent and the composite contaminated soil stable purification agent according to the present invention are mixed with harmful substances.
In addition, the composite contaminated soil improving purification agent and the composite contaminated soil stabilizing purification agent have the ability to reduce and chemisorb ionic substances and to retain them in a large amount in carbon.

Heavy metals (cadmium, all cyanide, organic phosphorus, lead, hexavalent chromium / arsenic, total mercury, alkyl mercury / dioxins / PCB / VOC “dichloromethane, carbon tetrachloride, trichlorethylene, tetrachlorethylene, benzene, and other 10 types” Decomposition of oils (crude oil, gasoline, lubricating oil, heavy oil)) is possible to penetrate into details by using the complex contaminated soil improving purification agent and the complex contaminated soil stable purification agent, loosening intermolecular bonds, adsorption, and partly fusing It is decomposed and returned to natural elements to be purified.
When dibenzofuran, polychlorinated dibenzo, dioxin, polychlorinated dibenzofuran, and the like pass through CIC and CSC, they return to natural elements such as H, O, C, and C1, and fuse with carbon.
In addition, the combined polluted soil improving cleaner and the combined contaminated soil stabilizing cleaner loosen the bonds and more easily and quickly return to natural elements.
Since CI does not exist as a simple substance, it binds to metals and harmful compounds, and part of it becomes hypochlorous acid.

Phosphorus Pack Test In FIG. 1, when a phosphorus pack test was performed with the composite contaminated soil improvement purification agent (CIC-2) having the blending ratio of claim 2, the dark purple sample stock solution changed to an almost colorless and transparent liquid. . In addition, the display of (CIC-1) of FIG. 1 is what was tested by the other compounding rate of the composite contaminated soil improvement purification agent, and is the same until FIG.

Hexavalent Chromium Pack Test In FIG. 2, when a hexavalent chrome pack test was performed with the composite contaminated soil improvement cleaner (CIC-2) having the blending ratio of claim 2, the purple sample stock solution was almost colorless and transparent. Changed to liquid.

Arsenic Pack Test In FIG. 3, when a arsenic pack test was performed with the composite contaminated soil improvement purification agent (CIC-2) having the blending ratio of claim 2, the purple specimen stock solution changed to a nearly colorless and transparent liquid. .

Copper pack test In FIG. 4, when a copper pack test was performed with the composite contaminated soil improvement purification agent (CIC-2) of the blending ratio of claim 2, the yellow sample stock solution changed to a substantially colorless and transparent liquid. .

When the "composite contaminated soil purification / improvement" test was conducted using the soil conditioner according to the present invention, the following results were obtained.
First, soil (soil) is collected from rice fields (paddy fields). “Soil Collection Box”, “Cadmium Reagent Sample Box (Cadmium Contaminated Soil)”, “3% Complex Contaminated Soil Cleanup / Improvement Agent to the Weight of Cadmium Contaminated Soil, Stir and Improve Soil Make a box. Then, water is added to the “collecting soil box”, “cadmium-contaminated soil box”, and “soil box to which a complex contaminated soil purification / improving agent is added” and stirred. Finally, seedlings are planted.

The growth comparison of “rice seedlings planted in contaminated soil containing cadmium (FIG. 5A) and rice seedlings planted in soil added with complex contaminated soil purification / improving agent (FIG. 5A-1)” is as follows. is there.
"May 22, 2003" Rice seedling planting (Figure 5A "Right box" and below, same up to Figure 14J)-(Figure 5A-1 "Left box" and below, same up to Figure 14J-1), both Rice seedlings height 12cm
"June 03, 2003" (Fig. 5A) 12cm (Fig. 5A-1) 14cm
"June 11, 2003" (Figure 5A) 13cm (Figure 5A-1) 18cm
"June 18, 2003" (Figure 5A) 17cm (Figure 5A-1) 24cm
"June 25, 2003" (Figure 5A) 22cm (Figure 5A-1) 32cm
"07/07/2003" (Figure 5A) 28cm (Figure 5A-1) 43cm

The growth comparison between “rice seedlings planted in contaminated soil containing phosphorus (FIG. 6B) and rice seedlings planted in soil added with complex contaminated soil purification / improving agent (FIG. 6B-1)” is as follows. is there.
"May 22, 2003" Rice seedling planting (Fig. 6A), (Fig. 6A-1), height of rice seedling ≒ 12cm.
"June 03, 2003" (Fig. 6B) 12cm (Fig. 6B-1) 14cm
"June 11, 2003" (Figure 6B) 13cm (Figure 6B-1) 17cm
"June 18, 2003" (Fig. 6B) 17cm (Fig. 6B-1) 23cm
"June 25, 2003" (Fig. 6B) 21cm (Fig. 6B-1) 30cm
"07/07/2003" (Figure 6B) 27cm (Figure 6B-1) 40cm

The growth comparison of “rice seedlings planted in contaminated soil containing lead (FIG. 7C) and rice seedlings planted in soil added with complex contaminated soil purification / improving agent (FIG. 7C-1)” is as follows. is there.
"May 22, 2003" Rice seedling planting (Fig. 7C), (Fig. 7C-1), height of rice seedling ≒ 12cm.
"June 03, 2003" (Fig. 7C) 12cm (Fig. 7C-1) 14cm
"June 11, 2003" (Figure 7C) 13cm (Figure 7C-1) 17cm
"June 18, 2003" (Figure 7C) 16cm (Figure 7C-1) 22cm
"June 25, 2003" (Figure 7C) 20cm (Figure 7C-1) 30cm
"07/07/2003" (Figure 7C) 25cm (Figure 7C-1) 39cm

The growth comparison of “rice seedlings planted in contaminated soil containing hexavalent chromium (FIG. 8D) and rice seedlings planted in soil added with complex contaminated soil purification / improving agent (FIG. 8D-1)” is as follows. Street.
"May 22, 2003" Rice seedling planting (Fig. 8D) (Fig. 8D-1), height of rice seedling ≒ 12cm.
"June 03, 2003" (Fig. 8D) 12cm (Fig. 8D-1) 14cm
"June 11, 2003" (Figure 8D) 13cm (Figure 8D-1) 18cm
"June 18, 2003" (Figure 8D) 16cm (Figure 8D-1) 23cm
"June 25, 2003" (Fig. 8D) 22cm (Fig. 8D-1) 30cm
"07/07/2003" (Figure 8D) 28cm (Figure 8D-1) 39cm

The growth comparison of “rice seedlings planted in contaminated soil containing arsenic (FIG. 9E) and rice seedlings planted in soil added with complex contaminated soil purification / improving agent (FIG. 9E-1)” is as follows. is there.
"May 22, 2003" Rice seedling planting (Fig. 9E), (Fig. 9E-1), height of rice seedling ≒ 12cm.
"June 03, 2003" (Figure 9E) 12cm (Figure 9E-1) 14cm
"June 11, 2003" (Figure 9E) 13cm (Figure 9E-1) 16cm
"June 18, 2003" (Figure 9E) 16cm (Figure 9E-1) 21cm
"June 25, 2003" (Figure 9E) 21cm (Figure 9E-1) 28cm
"07/07/2003" (Figure 9E) 27cm (Figure 9E-1) 36cm

Comparison of the growth of “rice seedlings planted in contaminated soil containing mercury (FIG. 10A) and rice seedlings planted in soil contaminated with complex contaminated soil purification / improving agent (FIG. 10A-1)” is as follows. is there.
“May 22, 2003” Rice seedling planting (Fig. 10F), (Fig. 10F-1), height of rice seedling ≒ 12cm.
"June 03, 2003" (Fig. 10F) 12cm (Fig. 10F-1) 14cm
"June 11, 2003" (Figure 10F) 13cm (Figure 10F-1) 17cm
"June 18, 2003" (Figure 10F) 16cm (Figure 10F-1) 22cm
"June 25, 2003" (Figure 10F) 20cm (Figure 10F-1) 29cm
"07/07/2003" (Figure 10F) 26cm (Figure 10F-1) 37cm

The growth comparison of “rice seedlings planted in contaminated soil containing copper (FIG. 11G) and rice seedlings planted in soil added with complex contaminated soil purification / improving agent (FIG. 11G-1)” is as follows. is there.
"May 22, 2003" Rice seedling planting (Fig. 11G), (Fig. 11G-1), height of rice seedling ≒ 12cm.
"June 03, 2003" (Figure 11G) 12cm (Figure 11G-1) 14cm
"June 11, 2003" (Figure 11G) 13cm (Figure 11G-1) 17cm
"June 18, 2003" (Fig. 11G) 16cm (Fig. 11G-1) 23cm
"June 25, 2003" (Figure 11G) 20cm (Figure 11G-1) 30cm
"07/07/2003" (Figure 11G) 26cm (Figure 11G-1) 38cm

The growth comparison of “rice seedlings planted in contaminated soil containing selenium (FIG. 12H) and rice seedlings planted in soil added with complex contaminated soil purification / improving agent (FIG. 12H-1)” is as follows. is there.
“May 22, 2003” Rice seedling planting (Fig. 12H), (Fig. 12H-1), height of rice seedling ≒ 12cm.
"June 03, 2003" (Fig. 12H) 12cm (Fig. 12H-1) 13cm
"June 11, 2003" (Figure 12H) 13cm (Figure 12H-1) 16cm
"June 18, 2003" (Figure 12H) 15cm (Figure 12H-1) 20cm
"June 25, 2003" (Figure 12H) 19cm (Figure 12H-1) 26cm
"07/07/2003" (Figure 12H) 25cm (Figure 12H-1) 36cm

The growth comparison of “rice seedlings planted in contaminated soil containing boron (FIG. 13I) and rice seedlings planted in soil added with complex contaminated soil purification / improving agent (FIG. 13I-1)” is as follows. It is.
“May 22, 2003” Planting rice seedlings (Fig. 13I) (Fig. 13I-1), height of rice seedlings ≈ 12cm.
"June 03, 2003" (Fig. 13I) 12cm (Fig. 13I-1) 13cm
"June 11, 2003" (Fig. 13I) 13cm (Fig. 13I-1) 16cm
"June 18, 2003" (Fig. 13I) 15cm (Fig. 13I-1) 20cm
"June 25, 2003" (Fig. 13I) 19cm (Fig. 13I-1) 27cm
"07/07/2003" (Figure 13I) 25cm (Figure 13I-1) 36cm

The growth comparison of “rice seedlings planted in normal soil (FIG. 14J) and rice seedlings planted in soil to which a complex contaminated soil purification / improving agent is added (FIG. 14J-1)” is as follows.
"May 22, 2003" Rice seedling planting (Fig. 14J), (Fig. 14J-1), height of rice seedling ≒ 12cm.
"June 03, 2003" (Fig. 14J) 12cm (Fig. 14J-1) 14cm
"June 11, 2003" (Figure 14J) 13cm (Figure 14J-1) 18cm
"June 18, 2003" (Figure 14J) 16cm (Figure 14J-1) 23cm
"June 25, 2003" (Figure 14J) 20cm (Figure 14J-1) 30cm
"07/07/2003" (Figure 14J) 24cm (Figure 14J-1) 38cm

  From the above-mentioned “FIG. 1A, FIG. 1A-1” to “FIG. 14J, FIG. 14J-1”, it is found that the combined contamination is higher than the rice seedlings “FIG. 1A” to “FIG. 9I” and “FIG. 14J” in the contaminated soil box. From the rice seedlings "Fig. 5A-1" to "Fig. 15J-1" to which soil remediation / improving agents are added, the height and stem grow about twice as fast, and the leaves are light yellow. The green color is deeper and stronger than the contaminated soil. In addition, as shown in FIG. 15, soil obtained by adding complex contaminated soil purification / improving agent to contaminated soil containing cadmium has the effect of decomposing, releasing, and purifying harmful substances on the water surface. is doing.

    “Soil crushing”: A 1m layer (deep layer) 30cm below the surface soil of agricultural fields such as paddy fields and fields is dug up with a plow equipped with a large tractor. It is constructed to produce effects such as exposure to sunlight on the deep soil, improving air permeability, air permeability, chemicals, improved materials, microorganism activation, and soil natural purification.

    "Inverted tillage": The soil from the surface layer to 35cm below is roughly crushed while digging it back with a paddle / rotary crusher equipped on a large tractor. Under the surface soil, there is impermeable skin about 30cm. The tightly tightened layer has a negative effect on the plant root tension. Air permeability, permeability, hindering the activation of microorganisms, and a layer of contaminants such as agricultural chemicals and fertilizers. By crushing the impermeable layer, the surface layer and lower layer are turned upside down (soil upside down) to promote soil improvement and soil purification.

    “Soil preparation, leveling and repression”: The soil that has been dug up roughly by subsoil crushing and reversal plowing is crushed into fine particles by a rotary agitator equipped on a large tractor. While leveling the particles evenly, give them pressure (appropriate rolling pressure is applied to keep the soil from rising by the wind).

  After the construction of “subsoil breakage”, “inverted plowing”, and “leveling / leveling / squeezing”, the complex contaminated soil purification / improving agent and complex contaminated soil improvement / purification are carried out by a spreader equipped on a large tractor. Spread the agent on the soil. In the case of fields, etc., after stirring, it is naturally purified by penetrating water such as sunlight and rain.

    “Oyaki Kaki”: Fill the paddy field before planting. Using a rotary stirrer equipped in a large tractor or the like, the mixed soil in which the composite contaminated soil purification / improving agent / soil and the composite contaminated soil improvement purification agent are sprayed is agitated. By replacing the paddy before paddy planting, the improved soil purification is promoted in a short period of time.

“Example of work and construction of complex contaminated soil remediation / improving agent” The compound contaminated soil remediation / improving agent is a combination of soil remediation and soil improvement by heavy metals in agricultural fields such as paddy fields and fields.
In the construction of paddy fields, the contaminated soil purification and soil improvement soil is dug up with a machine such as a large tractor, and then the spraying machine combined soil purification and improvement agent is sprayed. Next, thoroughly agitate the soil and complex contaminated soil purification / improving agent with a tractor. Purification is promoted in a short period of time by paddy before rice planting. The construction of the field involves digging up the soil with a tiller or tractor, and spraying a contaminated soil purification / improving agent such as a spraying machine. The soil and the sprayed complex contaminated soil purification / improving agent are well agitated with a tiller or tractor. After construction, purification is promoted in a natural state by penetrating water such as sunlight and rain.

“Example of work and construction of complex contaminated soil improvement cleaner” For the construction of factory sites, residential land, and reclaimed land to which the complex contaminated soil improvement cleaner is applied, the contaminated soil is dug up with a drilling machine such as a backhoe.
The excavated contaminated soil is piled up at about 10 m ³ . 500 kg (5%) of the complex-contaminated soil-improving decontaminant is put on the piled soil by lifting it with a backhoe, and the soil and the complex-contaminated soil-improving decontaminant are mixed well. Backfill the agitated soil.
The backfilled soil is compacted while rolling with a bulldozer or tire roller.
After construction, it is purified in natural condition by infiltration water such as sunlight and rain.
Construction of paddy fields involves excavating contaminated soil with a machine such as a tractor and spreading it with a spreading machine. Next, thoroughly agitate the soil and complex contaminated soil purification / improving agent with a tractor. Purification is promoted in a short period of time by paddy before rice planting.
In the field construction, soil is dug up with a tiller or a tractor, and a complex contaminated soil improvement purification agent such as a spraying machine is sprayed. The soil and the sprayed composite contaminated soil improvement cleaner are well agitated with a tiller or tractor. After construction, purification is promoted in a natural state by penetrating water such as sunlight and rain.

“Example of work and operation of complex contaminated soil stabilization agent” The use of the complex contaminated soil stabilization agent is different from the complex contaminated soil improvement agent. That is, it is constructed only for the purpose of dealing with softly contaminated soil ground in factory sites, residential land, land development, and the like. Not suitable for cultivated land such as paddy fields and fields.
The composite contaminated soil stabilization agent is blended with a solidifying agent such as cement in order to stabilize the soft ground of the contaminated soil (flow prevention, etc.) and provide the strength of the ground. The construction sequence in the weak factory site, residential land, and land development site is the same as the construction of the composite contaminated soil improvement purification agent.

  INDUSTRIAL APPLICABILITY The present invention is suitable for soil purification improvement of food harvesting areas such as fields and ground purification improvement of construction sites such as residential land and factory ruins, and can greatly improve soil improvement efficiency and expand applications.

It is a drawing substitute photograph which shows the pack test of phosphorus. It is a drawing substitute photograph which shows the pack test of hexavalent chromium. It is a drawing substitute photograph showing the pack test of arsenic. It is a drawing substitute photograph which shows the pack test of copper. It is a drawing substitute photograph which shows the comparison of the seedling planted in the cadmium-contaminated soil and the seedling planted in the soil of the composite contaminated soil purification / improvement agent addition. It is a drawing substitute photograph which shows the comparison of the seedling planted in phosphorus contaminated soil and the seedling planted in the soil of compound contaminated soil purification and improvement agent addition. It is a drawing substitute photograph which shows the comparison of the seedling planted in the lead-contaminated soil and the seedling planted in the soil of the composite contaminated soil purification / improving agent addition. It is a drawing substitute photograph which shows the comparison of the seedling planted in the hexavalent chromium contaminated soil, and the seedling planted in the soil of compound contaminated soil purification / improvement agent addition. It is a drawing substitute photograph which shows the comparison of the seedling planted in the arsenic contaminated soil and the seedling planted in the soil of the compound contaminated soil purification / improvement agent addition. It is a drawing-substituting photograph showing a comparison between seedlings planted in mercury-contaminated soil and seedlings planted in soil contaminated with complex-contaminated soil purification / improving agent. It is a drawing substitute photograph which shows the comparison of the seedling planted in the copper contaminated soil and the seedling planted in the soil of the complex contaminated soil purification / improving agent addition. It is a drawing substitute photograph which shows the comparison of the seedling planted in the selenium contaminated soil and the seedling planted in the soil of the complex contaminated soil purification / improving agent addition. It is a drawing-substituting photograph showing a comparison between seedlings planted in boron-contaminated soil and seedlings planted in soil contaminated with complex-contaminated soil purification / improving agent. It is a drawing substitute photograph which shows the comparison of the seedling planted in normal soil and the seedling planted in the soil of complex contamination soil purification and improvement agent addition. It is a drawing-substituting photograph showing the detoxification status of the target substance due to decomposition, release, and purification action by adding complex contaminated soil purification / improving agent to cadmium-contaminated soil.

Claims (6)

  The blending order and blending ratio of the purifying agent and the improving agent for the contaminated soil are firstly natural zeolite 25 to 40%, secondly artificial zeolite 1 to 15%, thirdly charcoal 15 to 30% and fourthly. Activated carbon 1-15%, 5th carbonized pulp sludge ash 15-30%, 6th rice husk activated carbon 5-20%, 7th titanium oxide 1-10%, 8th aluminum sulfate 5-25%, 9th 1 to 10% sodium carbonate, 10 to 15 to 30% bentonite, 11 to 5 to 15% slaked lime, and mixed and stirred. The blending order and blending ratio of the improved purifier for the contaminated soil are: carbonized pulp sludge ash 25-40% first, natural zeolite 10-30%, third artificial zeolite 5-15%, fourth Activated carbon 5-15%, 5th silica 1-10%, 6th titanium oxide 1-10%, 7th aluminum sulfate 5-25%, 8th sodium carbonate 1-10%, 9th bentonite 5 -20%, 10th mixed slaked lime improvement agent characterized by mixing and stirring with 1-10% slaked lime.   The blending order and blending ratio of the stable cleaning agent for the contaminated soil are: 1st pulp sludge ash 25-50%, 2nd artificial zeolite 5-15%, 3rd activated carbon 5-15%, 4th cement 5 ~ 25%, 5th silica 1-10%, 6th calcium sulfate 1-10%, 7th titanium oxide 1-10%, 8th aluminum sulfate 5-25%, 9th sodium carbonate 1 10%, 10th bentonite 5-20%, 11th mixed slaked lime 1-15% mixed and stirred, characterized in that the composite contaminated soil stability purification agent. The blending order and blending ratio of the purifying agent and the improving agent for the contaminated soil are firstly natural zeolite 25 to 40%, secondly artificial zeolite 1 to 15%, thirdly charcoal 15 to 30% and fourthly. Activated carbon 1-15%, 5th carbonized pulp sludge ash 15-30%, 6th rice husk activated carbon 5-20%, 7th titanium oxide 1-10%, 8th aluminum sulfate 5-25%, 9 First, sodium carbonate 1-10%, 10th bentonite 15-30%, 11th mixed slaked lime 5-15% to obtain soil purification / improving agent. Agricultural lands such as paddy fields and fields that are stored and contaminated with heavy metals are dug up with agricultural machinery such as tractors and tillers, and the amount of purification / improving agent added per 10 m ^{3 of} contaminated soil is 200 kg (= 2%) to 50 A method for purifying and improving composite contaminated soil, characterized in that after spraying with the spraying machine or the like at a rate of 0 kg (= 5%), the mixture is stirred again with an agricultural machine. The blending order and blending ratio of the improved purifier for the contaminated soil are: carbonized pulp sludge ash 25-40% first, natural zeolite 10-30%, third artificial zeolite 5-15%, fourth Activated carbon 5-15%, 5th silica 1-10%, 6th titanium oxide 1-10%, 7th aluminum sulfate 5-25%, 8th sodium carbonate 1-10%, 9th bentonite 5 Contaminated soil that has been dug up and piled up at a rate of 200 kg (= 2%) to 500 kg per 10 m ^{3 of} soil improvement purification agent obtained by mixing and stirring with ˜20% and 10% slaked lime first. A mixed contaminated soil improvement and purification method, which is charged from above and mixed and agitated, and the agitated soil is backfilled to the original excavation site. The blending order and blending ratio of the stable cleaning agent for the contaminated soil are: 1st pulp sludge ash 25-50%, 2nd artificial zeolite 5-15%, 3rd activated carbon 5-15%, 4th cement 5 ~ 25%, 5th silica 1-10%, 6th calcium sulfate 1-10%, 7th titanium oxide 1-10%, 8th aluminum sulfate 5-25%, 9th sodium carbonate 1 10% 5-20% bentonite 10 th, 11 th and mixed stirred at slaked lime 1% to 15% to obtain a soil stabilizer cleaning agent, 200 Kg (= 2% this this soil stabilizer cleaning agent to 10 m ³ ) To 500 kg of soft soil consisting of contaminated soil, agitated with a backhoe or other excavating machine, leveled with a bulldozer, and stabilized by rolling with a road roller. Complex contaminated soil stability purification method that.