CN112088748A - Directional humification strengthening soil making based on iron circulation regulation and control, and preparation method and application thereof - Google Patents
Directional humification strengthening soil making based on iron circulation regulation and control, and preparation method and application thereof Download PDFInfo
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- CN112088748A CN112088748A CN202011010870.9A CN202011010870A CN112088748A CN 112088748 A CN112088748 A CN 112088748A CN 202011010870 A CN202011010870 A CN 202011010870A CN 112088748 A CN112088748 A CN 112088748A
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- red mud
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/30—Growth substrates; Culture media; Apparatus or methods therefor based on or containing synthetic organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Fertilizers (AREA)
Abstract
The directional humification strengthening soil making method based on iron circulation regulation is characterized by comprising the following steps of: 1) uniformly stirring organic molecular acid and red mud according to the mass ratio, so that iron minerals in the red mud are regulated and controlled by the organic molecular acid to form surface adsorption state iron ions; 2) adding a saccharide substance and water, stirring, and then wetting the red mud with the water, wherein the saccharide substance is used as a humification precursor; 3) putting the mixture into a reaction kettle for hydrothermal treatment to realize the coupling directional humification process of the carbohydrate and the organic molecular acid. The invention also discloses a preparation method of the composition. The invention has the ecological restoration function and can be applied to the area to be subjected to ecological restoration. The invention has the advantages of resource recycling of waste, environmental protection, economy and high efficiency.
Description
Technical Field
The invention belongs to the field of site remediation and solid waste recycling, and particularly relates to directional humification strengthening soil preparation based on iron cycle regulation.
The invention also relates to a method for preparing the directional humification reinforced soil building.
The invention also relates to application of the directional humification reinforced soil building.
Background
Soil impoverishment causes serious deterioration of ecological environment, influences habitats of human beings, animals and plants and causes loss of ecological functions in local areas. The barren land needs to be repaired urgently.
The red mud is a common industrial solid waste, the annual output is up to thousands of tons, and the red mud has strong alkalinity, and the mass production and storage cause increasingly serious environmental risk problems. The conventional red mud treatment mode mainly comprises the steps of preparing building, environment-friendly and agricultural materials. However, in the application process, the strong alkalinity of the red mud needs to be overcome, and the dealkalization cost is too high. In order to overcome the high dealkalization cost, patent 201911366994.8 (an ecological restoration method and restoration system for red mud using biomass) provides a method and restoration system for preparing a red mud soil matrix by using biomass and red mud co-hydrothermal method, and provides a new scheme for red mud reuse. However, the red mud soil matrix prepared by the scheme only has a pH index, and can generate waste liquid, so that the soil aggregate structure or the function of the red mud soil matrix cannot be well explained.
In order to better utilize the red mud to reconstruct the soil and solve the serious problem of soil impoverishment in China, the invention develops a new red mud soil-making scheme.
Disclosure of Invention
The invention aims to provide directional humification strengthening soil making based on iron circulation regulation and control.
The invention also aims to provide a method for preparing the directional humification reinforced soil preparation.
In order to achieve the purpose, the invention utilizes organic molecular acid to regulate and control the form of iron minerals in the red mud to form adsorption-state iron ions and organic molecular acid, the adsorption-state iron ions induce the hydrothermal humification of carbohydrate substances at mineral interfaces through chemical bond action, the acid generated in the humification process can neutralize the strong basicity of the red mud, and meanwhile, the iron circulation regulation and the hydrothermal process coupling can accurately regulate and control the granular structure and the function of the newly-built soil.
Specifically, the directional humification strengthening soil making based on iron cycle regulation and control provided by the invention has an ecological restoration function and is obtained by the following method:
1) uniformly stirring organic molecular acid and red mud according to the mass ratio, so that iron minerals in the red mud are regulated and controlled by the organic molecular acid to form surface adsorption state iron ions;
2) adding a saccharide substance and water, stirring, and then wetting the red mud with the water, wherein the saccharide substance is used as a humification precursor;
3) putting the mixture into a reaction kettle for hydrothermal treatment to realize the coupling directional humification process of the carbohydrate and the organic molecular acid.
The invention provides a method for preparing the directional humification strengthening soil-making, which comprises the following steps:
1) uniformly stirring organic molecular acid and red mud according to the mass ratio, so that iron minerals in the red mud are regulated and controlled by the organic molecular acid to form surface adsorption state iron ions;
2) adding a saccharide substance and water, stirring, and then wetting the red mud with the water, wherein the saccharide substance is used as a humification precursor;
3) putting the mixture into a reaction kettle for hydrothermal treatment to realize the coupling directional humification process of the carbohydrate and the organic molecular acid.
In the method, the organic molecular acid comprises one or more of oxalic acid, citric acid and malic acid; the red mud is solid waste produced in the aluminum industry.
In the method, the added mass of the organic molecular acid is 0.5-2% of the mass of the red mud.
In the method, the saccharide substance comprises one or more of monosaccharide, disaccharide and polysaccharide; the added mass of the saccharides is 20-200% of the mass of the red mud.
In the method, the saccharide substance comprises one or more of glucose, sucrose and starch.
In the method, the water is added until all solid red mud is wetted, and the water addition is stopped when no obvious water flow exists.
In the method, the hydrothermal reaction temperature is 160-240 ℃, and the hydrothermal reaction time is 5-18 h.
The directional humification strengthening soil building method can be used in barren soil areas needing ecological restoration.
In the application, the directional humification strengthening soil-making is sprayed in situ in a barren soil area needing ecological restoration, the mixture is uniformly stirred by an in-situ stirring device, and vegetation is planted after stabilization for one week.
The invention has the beneficial effects that:
according to the directional humification strengthening soil-making method and the application, the iron mineral form in the red mud is regulated and controlled through the organic molecular acid, the hydro-thermal humification process of the carbohydrate substances is directionally modified, the soil with reasonable structure and excellent performance is reconstructed, the soil is used for restoring the barren soil or the soil polluted by heavy metal, and the ecological function of the area is restored through vegetation cultivation. According to the technical scheme, the red mud is utilized, meanwhile, the humus soil is manufactured, bad land can be effectively restored, regional ecological restoration is realized, and the survival rate of planted vegetation is improved by more than 90%.
Detailed Description
The technical scheme of the invention is as follows:
1) firstly, uniformly stirring organic molecular acid and red mud according to a certain mass ratio, and regulating iron minerals in the red mud by the organic molecular acid to form surface adsorption state iron ions; then adding a proper amount of sugar substances and water, stirring, and soaking the red mud with the water just, wherein the sugar substances are used as humification precursors; then putting the mixture into a reaction kettle for hydrothermal for a certain time to realize the coupling directional humification process of the saccharide substances and the organic molecular acid, wherein the humus can effectively improve the granular structure of the soil; and finally, directly collecting the hydrothermal reaction product for later use, wherein the product is the new soil with the ecological restoration function.
2) The newly constructed soil is used for a poor soil area needing ecological restoration, is directly sprayed on the area to be restored in situ, is uniformly stirred by an in-situ stirring device, and is stabilized for one week to plant vegetation so as to realize the restoration of the ecological function of the area.
According to the scheme, the organic molecular acid comprises oxalic acid, citric acid, malic acid and the like. The organic molecular acid is added according to 0.5-2% of the mass of the red mud. The red mud is derived from solid waste generated in the aluminum industry.
According to the scheme, the saccharide substances comprise glucose, sucrose, starch and other monosaccharides, disaccharides and polysaccharides. The addition amount of the saccharides is 20-200% of the red mud.
According to the scheme, water is slowly added while stirring until all solid red mud is soaked and the water is stopped without obvious water flow.
According to the scheme, the hydrothermal reaction temperature is 160-240 ℃, the hydrothermal reaction time is 5-18h, the hydrothermal product is mineral-based fresh soil wrapped by humic acid, the content of organic matters and quick-acting potassium is increased by more than two times, the content of quick-acting phosphorus is increased by more than 50%, each index of soil fertility is good, and the soil aggregate structure is reasonable.
According to the scheme, the newly constructed soil is directly used for the area to be restored, the soil is uniformly stirred and then placed for 7 days, the survival rate of the planted vegetation is improved by more than 90%, and the ecological function of the area to be restored is obviously improved.
Example 1
400g of red mud and 8g of oxalic acid are weighed, stirred for 2 minutes, 80g of glucose is added, stirred for 1 minute, 25mL of water is added dropwise, stirred for 2 minutes, and placed into a reaction kettle to react for 12 hours at 200 ℃. And (3) collecting humus soil after the reaction is finished, testing the pH of the soil to be 7.23, wherein the soil aggregate structure is reasonable, and comparing with the original red mud, the survival rate of the planted amorpha fruticosa is improved by 100%, and the amorpha fruticosa cannot grow in the original red mud substrate.
Example 2
Firstly, 400g of red mud and 2g of citric acid are weighed and stirred for 2 minutes, 800g of cane sugar is added and stirred for 1 minute, 20mL of water is added dropwise and stirred for 2 minutes, and the mixture is put into a reaction kettle to react for 18 hours at 160 ℃. And (3) collecting humus soil after the reaction is finished, testing the pH of the soil to be 4.62, wherein the soil aggregate structure is reasonable, uniformly mixing the humus soil with saline-alkali soil (pH is 8.35) in Shandong according to the mass ratio of 1:3, and planting 10 corn kernels after uniformly mixing the soil and the saline-alkali soil in Shandong. The physical and chemical properties of the soil are analyzed, and the effective components (K and organic matters) are obviously improved by about 70 percent, the water retention rate of the soil is improved by 43 percent, the germination rate of the corn is improved by 90 percent, namely 10 corn grains in the mixed soil completely germinate compared with the saline-alkali soil.
Example 3
Firstly, 400g of red mud and 4g of malic acid are weighed, stirred for 2 minutes, added with 200g of starch, stirred for 1 minute, added with 20mL of water drop by drop, stirred for 2 minutes and put into a reaction kettle for reaction at 240 ℃ for 5 hours. And (3) collecting humus soil after the reaction is finished, testing the pH of the soil to be 6.25, wherein the soil aggregate structure is reasonable, uniformly mixing the humus soil with saline-alkali soil (pH is 8.35) in Shandong according to the mass ratio of 1:2, and planting 20 corn kernels in the mixture of 6 kilograms of soil. The physical and chemical properties of the soil are analyzed, and the effective components (K and organic matters) are obviously improved by about 90 percent, the water retention rate of the soil is improved by 57 percent, the germination rate of the corn is improved by 95 percent, namely 20 corn grains in the mixed soil completely germinate compared with the saline-alkali soil.
Claims (10)
1. The directional humification strengthening soil making method based on iron circulation regulation is characterized by comprising the following steps of:
1) uniformly stirring organic molecular acid and red mud according to the mass ratio, so that iron minerals in the red mud are regulated and controlled by the organic molecular acid to form surface adsorption state iron ions;
2) adding a saccharide substance and water, stirring, and then wetting the red mud with the water, wherein the saccharide substance is used as a humification precursor;
3) putting the mixture into a reaction kettle for hydrothermal treatment to realize the coupling directional humification process of the carbohydrate and the organic molecular acid.
2. The method for preparing the directional humification strengthening soil building of claim 1:
1) uniformly stirring organic molecular acid and red mud according to the mass ratio, so that iron minerals in the red mud are regulated and controlled by the organic molecular acid to form surface adsorption state iron ions;
2) adding a saccharide substance and water, stirring, and then wetting the red mud with the water, wherein the saccharide substance is used as a humification precursor;
3) putting the mixture into a reaction kettle for hydrothermal treatment to realize the coupling directional humification process of the carbohydrate and the organic molecular acid.
3. The method of claim 2, wherein the organic molecular acid comprises one or more of oxalic acid, citric acid and malic acid; the red mud is solid waste produced in the aluminum industry.
4. The method according to claim 2, wherein the mass of the organic molecular acid added is 0.5-2% of the mass of the red mud.
5. The method of claim 2, wherein the saccharide comprises one or more of monosaccharides, disaccharides and polysaccharides; the added mass of the saccharides is 20-200% of the mass of the red mud.
6. The method of claim 5, wherein the carbohydrate material comprises one or more of glucose, sucrose and starch.
7. The method of claim 2 wherein the water is added in an amount such that all solid red mud is wetted and the addition of water is stopped without significant flow of water.
8. The method as claimed in claim 2, wherein the hydrothermal reaction temperature is 160-240 ℃ and the hydrothermal reaction time is 5-18 h.
9. Use of the directional humification enhanced soil building of claim 1 in areas of barren soil where ecological remediation is required.
10. The application of the fertilizer of claim 9, wherein the directional humation-enhanced soil-making is sprayed in situ in the barren soil area needing ecological restoration, stirred uniformly by an in-situ stirring device, and vegetation is planted after stabilization.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114431106A (en) * | 2022-02-15 | 2022-05-06 | 东北农业大学 | Construction method of acid rice seedling raising soil rich in artificial humus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114431106A (en) * | 2022-02-15 | 2022-05-06 | 东北农业大学 | Construction method of acid rice seedling raising soil rich in artificial humus |
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