CN111018619A - Soil remediation modifier for red mud reservoir remediation, preparation method thereof and ecological remediation treatment method for red mud reservoir - Google Patents
Soil remediation modifier for red mud reservoir remediation, preparation method thereof and ecological remediation treatment method for red mud reservoir Download PDFInfo
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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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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C11/00—Other nitrogenous fertilisers
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Abstract
The invention discloses a soil restoration modifier for red mud reservoir restoration, a preparation method thereof and a red mud reservoir ecological restoration treatment method, and belongs to the technical field of geological restoration. The soil remediation improver for red mud bank remediation comprises the following components in parts by weight: 5-15 parts of desulfurized gypsum, 50-90 parts of biomass material and 60-80 parts of fertilizer; the biomass material is at least one of bagasse, straw and biomass sawdust. The preparation method of the soil remediation improver for red mud bank remediation comprises the following steps: uniformly mixing the biomass material with the fertilizer to obtain a mixture; and uniformly mixing the mixture and the desulfurized gypsum to obtain the desulfurized gypsum. The soil remediation modifier for red mud warehouse remediation can greatly reduce the pH of the red mud soil and improve the content of organic matters in the red mud soil by combining the effects of biomass materials and desulfurized gypsum.
Description
Technical Field
The invention relates to the technical field of geological restoration, in particular to a soil restoration modifier for red mud reservoir restoration, a preparation method thereof and a red mud reservoir ecological restoration treatment method.
Background
Red mud is waste residue generated in the production process of alumina, is red due to a large amount of iron oxide, and is called red mud. Although the output of red mud varies with ore grade and production method, 1-1.8 tons of red mud are produced at the same time for producing 1 ton of alumina in most cases, and at least 6000 million tons of red mud are produced in the alumina industry all over the world every year. At present, most of red mud generated in the alumina industry is stacked in the open air, not only a large amount of land is occupied, but also harmful ingredients in the red mud can permeate underground to cause pollution of underground water and soil, and the naked red mud can form dust which flies with wind to cause harm to the environment.
The pH value of the soil of the red mud land is high, the salinization effect is very obvious, crops cannot grow, and the soil is hardened until the waste is wasted. Because plants cannot grow, the naked red mud can further form dust which flies around, and the environmental pollution is caused. The flying dust falls into the natural water body, the pH value of the water body can be increased, the balance of the natural water body is damaged, and the natural water body loses the drinking and irrigation functions in serious cases.
The application publication number of CN108359474A of the invention is CN108359474A, which discloses a Bayer process red mud modifier, comprising glucose, yeast extract, starch, calcium dihydrogen phosphate, distilled water, bagasse and/or plant straws, wherein the modifier adopts various components to match, and can reduce the pH value of red mud soil and improve the organic matter content of the soil.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide a soil remediation improver for red mud bank remediation, which is used for solving the problems of high pH value of red mud soil and low organic matter content after the improver is used in the prior art.
The second purpose of the invention is to provide a preparation method of the soil remediation improver for red mud bank remediation, which is simple to operate, high in preparation efficiency and suitable for field operation.
The third purpose of the invention is to provide an ecological restoration and treatment method for the red mud reservoir, which can greatly reduce the pH value of the red mud soil and improve the organic matter content of the soil.
In order to achieve the first object, the invention provides the following technical scheme:
the soil remediation improver for red mud warehouse remediation comprises the following components in parts by weight: 5-15 parts of desulfurized gypsum, 50-90 parts of biomass material and 60-80 parts of fertilizer; the biomass material is at least one of bagasse, straw and biomass sawdust.
By adopting the technical scheme, the soil remediation improver for red mud warehouse remediation disclosed by the invention adopts biomass materials as main components, so that the biomass content in the remediated red mud soil can be greatly increased, the biomass materials can react with water and bacteria in the soil to generate acidic substances, the pH value of the red mud soil can be reduced, and the organic matter content in the red mud soil can be increased. The desulfurized gypsum in the repair modifier can improve the stability of alkaline anions in a red mud soil system and further reduce the pH value of the soil. The biomass material adopted by the invention is at least one of bagasse, straw and sawdust, and the biomass material has high fiber content, so that soil hardening can be fully avoided, and the treated and repaired soil is suitable for planting. In order to further improve the plant friendliness of the repaired soil, the fertilizer is added, so that the survival rate of the plants planted in the repaired soil is improved.
The invention is further configured to: also comprises 20-30 parts of ferrous sulfate.
By adopting the technical scheme, the ferrous sulfate is beneficial to promoting the polymerization of iron, silicon and aluminum in the red mud, the stability of the ions is improved, and the influence of the ions on the soil and plants planted on the soil is avoided.
The invention is further configured to: the biological agent also comprises 2-5 parts of a microbial agent, wherein the microbial agent is at least one of photosynthetic bacteria and yeast.
By adopting the technical scheme, the microbial preparation is added into the soil remediation improver for red mud bank remediation, and the added biomass material is degraded by using the strain to generate more acidic substances, so that the pH value of the red mud soil is further reduced.
The invention is further configured to: also comprises 30-50 parts of ammoniated humic acid.
By adopting the technical scheme, the content of organic matters in the soil can be further improved by the added ammoniated humic acid, the soil is prevented from hardening, and the survival rate of plants planted in the soil is also improved. The ammoniated humic acid can also neutralize and adjust the pH value of the soil and reduce the alkalinity of the red mud soil.
The invention is further configured to: the fertilizer is at least one of a chemical fertilizer and an organic fertilizer.
Through adopting above-mentioned technical scheme, adopt the mode that chemical fertilizer and fertilizer inter combination with fertilizer, both utilized the fertilizer to improve organic matter content and soil fertility in the soil, can also utilize the cation in the chemical fertilizer to promote the bridging effect between the soil granule, avoid soil granule structure to be destroyed, and then avoid soil hardening. In addition, abundant microorganisms in the organic fertilizer can degrade biomass, the degradation products are utilized to reduce the alkalinity of the soil, and the organic matter content in the soil can be improved.
The invention is further configured to: the fertilizer is obtained by mixing a chemical fertilizer and an organic fertilizer according to the mass ratio of (1-3) to (1-3).
By adopting the technical scheme, the proportion of the fertilizer and the organic fertilizer in the fertilizer is proper, and the promotion of the bridging effect of the cations in the fertilizer on soil granules and the full play of the organic fertilizer are ensured. Because the consumption of the microorganisms to the carbon is increased when the nitrogen element is increased, the reasonable proportion of the fertilizer and the organic fertilizer is set, and the increase of the nitrogen element in the soil caused by the improper proportion of the fertilizer and the organic fertilizer can be avoided.
The invention is further configured to: the fertilizer is a phosphate fertilizer.
By adopting the technical scheme, phosphate ions in the phosphate fertilizer can be combined with metal ions in the soil to generate stable phosphate, so that the damage of the metal ions in the soil to the acid-base balance of the repaired soil is avoided.
In order to achieve the second object, the invention provides the following technical scheme:
the preparation method of the soil remediation improver for red mud bank remediation comprises the following steps:
1) uniformly mixing the biomass material with the fertilizer to obtain a mixture;
2) and (2) uniformly mixing the mixture obtained in the step 1) with the desulfurized gypsum to obtain the desulfurized gypsum.
By adopting the technical scheme, the preparation method of the soil remediation improver for red mud bank remediation firstly uniformly mixes the biomass material and the fertilizer, then mixes the mixture with the desulfurization gypsum, and can firstly disperse the fertilizer by using the biomass material so as to avoid the influence of the components in the fertilizer on the remediation effect of the remediation improver due to the reaction with the desulfurization gypsum added later. In addition, the preparation method of the repair modifier is simple to operate, can be used for field production near a red mud reservoir, reduces the transportation cost, can be prepared at the present time, and avoids the failure of the modifier caused by the influence of the environment.
The invention is further configured to: and 2) uniformly mixing the mixture and the desulfurized gypsum in the step 2), adding ammoniated humic acid, and uniformly mixing.
By adopting the technical scheme, because ammoniation humic acid is when preparing, the humic acid has adsorbed a large amount of ammonia, mix after biomass material and fertilizer mix and mix with the desulfurization gypsum, add ammoniation humic acid again, can avoid the composition in the fertilizer to cause the influence to the ammonia in the humic acid.
In order to achieve the third object, the invention provides the following technical solutions:
a red mud reservoir ecological restoration treatment method comprises the following steps: leveling the red mud, carrying out rotary tillage, then spreading the soil remediation modifier for red mud warehouse remediation on the red mud land, uniformly raking, watering, and curing for 15-30 days; planting the restoration plants and watering.
By adopting the technical scheme, the soil remediation improver for red mud bank remediation is applied after rotary tillage of the red mud land, and is watered and cured after being raked uniformly, so that the soil remediation improver for red mud bank remediation can fully act with the red mud, the pH of the red mud soil is reduced, organic matters in the soil are increased, the soil planting conditions are improved, and then remediation plants are planted on the soil, thereby realizing remediation and greening of the red mud land.
In conclusion, the invention has the following beneficial effects:
the soil remediation modifier for red mud warehouse remediation can greatly reduce the pH of the red mud soil and improve the content of organic matters in the red mud soil by combining the effects of biomass materials and desulfurized gypsum.
Detailed Description
The present invention will be described in further detail with reference to examples.
The corn stalks adopted by the invention are fresh corn stalks which are planted near the mining area and are mature in the current year. The photosynthetic bacteria adopted by the invention are commercial photosynthetic bacteria powder, wherein the viable count is 50 hundred million/gram. Preferably, the photosynthetic bacteria are cyanobacteria or purple bacteria. The bagasse adopted by the invention is obtained by drying the residual bagasse in sugar production of sugarcane in sugar factories.
In the soil remediation improver for red mud bank remediation, the biomass material is preferably obtained by mixing straw and biomass sawdust in a mass ratio of (3-5): 1. Or the biomass material is prepared by mixing bagasse, straw and biomass sawdust in a mass ratio of (20-30) to (40-50) to (10-20). The straws are corn straws or sorghum straws. Further preferably, the straw is straw granules, and the water content of the straw granules is 15-25%. The organic fertilizer is obtained by fermenting animal manure.
The ammoniated humic acid is prepared by the method comprising the following steps: adding the lignite particles into ammonia water, uniformly mixing, and carrying out closed reaction for 5-10 days to obtain the lignite particles. The lignite is coke as local produced lignite. The mass fraction of humic acid in the lignite is not less than 50%. The particle size of the lignite particles is 100-170 meshes. The lignite particles are obtained by crushing, sieving and drying lignite. The mass fraction of ammonia water is 15-28%. The mass ratio of the ammonia water to the lignite particles is 1: 4-7.
According to the method for ecological restoration and treatment of the red mud reservoir, the planting restoration plants are mixed planting of herbaceous plants and woody plants. The planting depth of the herbaceous plants is 2cm, and the planting depth of the woody plants is 30 cm. Preferably, the repair plant is at least one of Lolium perenne, Suaeda glauca, splendid achnatherum, Australian fir, Carcinia kwangsiensis, Opuntia ficus-indica and bamboo. 5000-10000kg of the soil remediation improver for red mud warehouse remediation is applied to each mu of red mud land.
In the following embodiment, the restoration of the red mud bank of the zhou branch company of the limited aluminum industry in china is taken as an example for explanation, during the restoration, the on-site preparation of the ammoniated humic acid can be carried out by utilizing the lignite produced nearby, and the local materials can be obtained by utilizing the straws produced in the nearby farmlands and the animal manure produced in the breeding farms, so that the restoration cost is reduced.
Example 1
The soil remediation improver for red mud bank remediation of the embodiment comprises the following components in parts by weight: 5 parts of desulfurized gypsum, 50 parts of biomass material, 60 parts of organic fertilizer, 28 parts of ferrous sulfate, 2 parts of microbial preparation and 48 parts of ammoniated humic acid. Wherein the biomass material is corn straw granular material, and the water content of the corn straw granular material is 24.5%; the fertilizer is obtained by fermenting cow dung; the microbial preparation is photosynthetic bacteria powder.
The preparation method of the soil remediation improver for red mud bank remediation comprises the following steps:
1) removing roots and leaves of the corn straws, only keeping the corn straws, drying in the shade for 10 days, crushing by a crusher to obtain the corn straw granules with the particle size of 8mm, then sending the corn straw granules into a drying furnace, drying for 10min at 80 ℃, taking out and airing for 12h to obtain the corn straw granules.
2) The method comprises the following steps of crushing lignite, sieving the crushed lignite by a 100-mesh sieve to obtain lignite particles, adding the lignite particles into a stirrer, and adding 28 mass percent of ammonia water into the stirrer, wherein the mass of the added ammonia water accounts for 17 mass percent of the lignite particles. And then stirring the material added with the ammonia water for 15min at the rotating speed of 20r/min under a sealed condition, taking out, filling into a tank, sealing and storing for 3 days, and taking out to obtain the ammoniated humic acid.
3) Adding the corn straw granules prepared in the step 1) and the fermented cow dung into a stirrer, stirring and mixing at a rotating speed of 20r/min for 10min, then adding a microbial preparation, continuously stirring and mixing at a rotating speed of 20r/min for 30min, discharging, and hermetically storing for 20 h.
4) Adding the mixture subjected to the sealed preservation in the step 3), the desulfurized gypsum and the ferrous sulfate into a stirrer, stirring and mixing for 15min at the rotating speed of 50r/min, then adding the ammoniated humic acid, and continuously stirring and mixing for 10min at the rotating speed of 50r/min to obtain the composite material.
The method for ecological restoration and treatment of the red mud reservoir comprises the following steps:
1) flattening red mud lands, carrying out rotary tillage, wherein the rotary tillage depth is 30cm, and then spreading the red mud bank repairing soil repairing improver on the red mud lands, wherein the application amount of the red mud bank repairing soil repairing improver is 5300kg of the red mud bank repairing soil repairing improver applied to each mu of red mud lands. Then raking evenly, watering and curing for 15 days. The amount of watering is 30t per mu of land.
2) And (4) planting restoration plants on the cured land, and then watering. The restoring plants are ryegrass and bamboos which are planted in a crossed mode, the planting depth of the ryegrass is 2cm, and the planting depth of the bamboos is 20 cm.
Example 2
The soil remediation improver for red mud bank remediation of the embodiment comprises the following components in parts by weight: 8 parts of desulfurized gypsum, 60 parts of biomass material, 70 parts of organic fertilizer, 25 parts of ferrous sulfate, 3 parts of microbial preparation and 40 parts of ammoniated humic acid. The biomass material is a mixture obtained by mixing corn straw granules and biomass sawdust in a mass ratio of 5:1, and the water content of the corn straw granules is 18%; the fertilizer is obtained by fermenting cow dung; the microbial preparation is photosynthetic bacteria powder.
The preparation method of the soil remediation improver for red mud bank remediation comprises the following steps:
1) removing roots and leaves of the corn straws, only keeping the corn straws, drying in the shade for 12 days, crushing by a crusher to obtain the corn straw granules with the particle size of 5mm, then sending the corn straw granules into a drying furnace, drying for 5min at 100 ℃, taking out and airing for 10h to obtain the corn straw granules.
2) The method comprises the following steps of crushing lignite, sieving through a 120-mesh sieve to obtain lignite particles, adding the lignite particles into a stirrer, and adding 25% by mass of ammonia water into the stirrer, wherein the mass of the added ammonia water accounts for 20% of the mass of the lignite particles. And then stirring the material added with the ammonia water for 15min at the rotating speed of 25r/min under a sealed condition, taking out, filling into a tank, sealing and preserving for 5 days, and taking out to obtain the ammoniated humic acid.
3) Adding the corn straw granules prepared in the step 1) and the biomass sawdust granules into a stirrer, stirring for 20min at a rotating speed of 15r/min, then adding the fertilizer into the stirrer, stirring and mixing for 15min at a rotating speed of 20r/min, then adding the microbial preparation, continuing stirring and mixing for 20min at a rotating speed of 30r/min, unloading, and hermetically storing for 15 h.
4) Adding the mixture subjected to the sealed preservation in the step 3), the desulfurized gypsum and the ferrous sulfate into a stirrer, stirring and mixing for 15min at the rotating speed of 35r/min, then adding the ammoniated humic acid, and continuously stirring and mixing for 15min at the rotating speed of 50r/min to obtain the composite material.
The method for ecological restoration and treatment of the red mud reservoir comprises the following steps:
1) flattening red mud lands, carrying out rotary tillage, wherein the rotary tillage depth is 25cm, and then spreading the red mud bank repairing soil repairing improver on the red mud lands, wherein the application amount of the red mud bank repairing soil repairing improver is 6500kg of the red mud bank repairing soil repairing improver applied to each mu of red mud lands. Then raking evenly, watering and curing for 25 days. The amount of watering is 20t per mu of land.
2) And (4) planting restoration plants on the cured land, and then watering. The restoring plants are ryegrass and bamboos which are planted in a crossed mode, the planting depth of the ryegrass is 2cm, and the planting depth of the bamboos is 20 cm.
Example 3
The soil remediation improver for red mud bank remediation of the embodiment comprises the following components in parts by weight: 15 parts of desulfurized gypsum, 90 parts of biomass material, 80 parts of organic fertilizer, 21 parts of ferrous sulfate, 5 parts of microbial preparation and 48 parts of ammoniated humic acid. The biomass material is a mixture obtained by mixing bagasse, corn straw granules and biomass sawdust in a mass ratio of 3:5:1, and the water content of the corn straw granules is 20.7%; the fertilizer is obtained by fermenting cow dung; the microbial preparation is photosynthetic bacteria powder.
The preparation method of the soil remediation improver for red mud bank remediation comprises the following steps:
1) removing roots and leaves of the corn straws, only keeping the corn straws, drying in the shade for 15 days, crushing by a crusher to obtain the corn straw granules with the particle size of 10mm, then sending the corn straw granules into a drying furnace, drying for 15min at 70 ℃, taking out and airing for 15h to obtain the corn straw granules.
2) The method comprises the following steps of crushing lignite, sieving the crushed lignite by a 140-mesh sieve to obtain lignite particles, adding the lignite particles into a stirrer, and adding 25% by mass of ammonia water into the stirrer, wherein the mass of the added ammonia water accounts for 23% of the mass of the lignite particles. And then stirring the material added with the ammonia water for 10min at the rotating speed of 30r/min under a sealed condition, taking out, filling into a tank, sealing and preserving for 5 days, and taking out to obtain the ammoniated humic acid.
3) Adding the corn straw granules prepared in the step 1), bagasse and biomass sawdust granules into a stirrer, stirring for 10min at a rotating speed of 20r/min, then adding the fertilizer into the stirrer, stirring and mixing for 10min at a rotating speed of 30r/min, then adding the microbial preparation, continuing stirring and mixing for 20min at a rotating speed of 25r/min, discharging, and hermetically storing for 15 h.
4) Adding the mixture subjected to the sealed preservation in the step 3), the desulfurized gypsum and the ferrous sulfate into a stirrer, stirring and mixing for 10min at the rotating speed of 40r/min, then adding the ammoniated humic acid, and continuously stirring and mixing for 15min at the rotating speed of 40r/min to obtain the composite material.
The method for ecological restoration and treatment of the red mud reservoir comprises the following steps:
1) flattening red mud lands, carrying out rotary tillage, wherein the rotary tillage depth is 25cm, and then spreading the red mud bank repairing soil repairing improver on the red mud lands, wherein the application amount of the red mud bank repairing soil repairing improver is 8100kg of the red mud bank repairing soil repairing improver applied to each mu of red mud lands. Then raking evenly, watering and curing for 20 days. The amount of watering was 25t per acre of land.
2) And (4) planting restoration plants on the cured land, and then watering. The restoring plants are ryegrass and bamboos which are planted in a crossed mode, the planting depth of the ryegrass is 2cm, and the planting depth of the bamboos is 20 cm.
Example 4
The soil remediation improver for red mud bank remediation of the embodiment comprises the following components in parts by weight: 12 parts of desulfurized gypsum, 75 parts of biomass material, 75 parts of organic fertilizer, 26 parts of ferrous sulfate, 5 parts of microbial preparation and 36 parts of ammoniated humic acid. The biomass material is a mixture obtained by mixing bagasse, corn straw granules and biomass sawdust in a mass ratio of 20:40:15, and the water content of the corn straw granules is 20.7%; the fertilizer is obtained by mixing a chemical fertilizer and an organic fertilizer in a mass ratio of 1:3, wherein the chemical fertilizer is a calcium magnesium phosphate fertilizer, and the organic fertilizer is obtained by fermenting cow dung; the microbial preparation is photosynthetic bacteria powder.
The preparation method of the soil remediation improver for red mud bank remediation is the same as that in example 3, and the ecological remediation and treatment method for the red mud bank is the same as that in example 3.
Example 5
The soil remediation improver for red mud bank remediation of the embodiment comprises the following components in parts by weight: 12 parts of desulfurized gypsum, 80 parts of biomass material, 75 parts of organic fertilizer, 22 parts of ferrous sulfate, 5 parts of microbial preparation and 45 parts of ammoniated humic acid. The biomass material is a mixture obtained by mixing bagasse, corn straw granular material and biomass sawdust in a mass ratio of 20:45:15, and the water content of the corn straw granular material is 20.7%; the fertilizer is obtained by mixing a chemical fertilizer and an organic fertilizer in a mass ratio of 3:1, wherein the chemical fertilizer is a calcium magnesium phosphate fertilizer, and the organic fertilizer is obtained by fermenting cow dung; the microbial preparation is obtained by mixing photosynthetic bacteria powder and yeast according to the mass ratio of 1: 1.
The preparation method of the soil remediation improver for red mud bank remediation is the same as that in example 3, and the ecological remediation and treatment method for the red mud bank is the same as that in example 3.
Example 6
The soil remediation improver for red mud bank remediation of the embodiment comprises the following components in parts by weight: 10 parts of desulfurized gypsum, 85 parts of biomass material, 70 parts of organic fertilizer, 25 parts of ferrous sulfate, 5 parts of microbial preparation and 32 parts of ammoniated humic acid. The biomass material is a mixture obtained by mixing bagasse, corn straw granular material and biomass sawdust in a mass ratio of 25:40:20, and the water content of the corn straw granular material is 20.7%; the fertilizer is obtained by mixing a chemical fertilizer and an organic fertilizer in a mass ratio of 1:1, wherein the chemical fertilizer is a calcium magnesium phosphate fertilizer, and the organic fertilizer is obtained by fermenting cow dung; the microbial preparation is obtained by mixing photosynthetic bacteria powder and yeast according to the mass ratio of 1: 1.
The preparation method of the soil remediation improver for red mud bank remediation is the same as that in example 3, and the ecological remediation and treatment method for the red mud bank is the same as that in example 3.
Example 7
The soil remediation improver for red mud bank remediation of the embodiment comprises the following components in parts by weight: 5 parts of desulfurized gypsum, 50 parts of biomass material, 60 parts of organic fertilizer, 21 parts of ferrous sulfate and 3 parts of microbial agent. Wherein the biomass material is corn straw granular material, and the water content of the corn straw granular material is 20.7%; the fertilizer is an organic fertilizer and is obtained by fermenting cow dung; the microbial preparation is photosynthetic bacteria powder.
The preparation method of the soil remediation improver for red mud bank remediation of the embodiment is different from that of the embodiment 3 in that the preparation and addition steps of the ammoniated humic acid are not performed, and the rest is the same as that of the embodiment 3. The method for the ecological restoration and treatment of the red mud reservoir is the same as that in example 3.
Example 8
The soil remediation improver for red mud bank remediation of this example is different from example 7 in that it does not contain a microbial preparation, and is otherwise the same as that of example 7. The preparation method of the soil remediation improver for red mud bank remediation and the ecological remediation and treatment method for the red mud bank are the same as those in example 3.
Example 9
The soil remediation improver for red mud bank remediation of the present example is different from example 7 in that it does not contain ferrous sulfate and a microbial preparation, and is otherwise the same as that of example 7. The preparation method of the soil remediation improver for red mud bank remediation and the ecological remediation and treatment method for the red mud bank are the same as those in example 3.
Comparative example 1
The soil remediation improver for red mud bank remediation in the comparative example comprises corn straw particles and an organic fertilizer in a mass ratio of 1:1, wherein the corn straw particles and the organic fertilizer are the same as those in example 1. The preparation method of the soil remediation improver for red mud warehouse remediation of the comparative example comprises the step of adding the corn straw particles and the organic fertilizer into a stirrer and stirring for 50min at a rotating speed of 20 r/min. The method for ecological restoration and treatment of the red mud reservoir in the comparative example refers to example 1.
Comparative example 2
The soil remediation improver for red mud bank remediation in the comparative example consists of biomass sawdust and ferrous sulfate in a mass ratio of 3: 1. The preparation method of the soil remediation improver for red mud warehouse remediation of the comparative example comprises the steps of adding the biomass sawdust and the ferrous sulfate into a stirrer and stirring for 30min at a rotating speed of 20 r/min. The method for ecological restoration and treatment of the red mud reservoir in the comparative example refers to example 1.
Comparative example 3
The soil remediation improver for red mud bank remediation in the present comparative example is desulfurized gypsum. The method for ecological restoration and treatment of the red mud reservoir in the comparative example refers to example 1.
Test examples
The effects of the red mud storehouse ecological restoration treatment methods in examples 1 to 9 and comparative examples 1 to 3 after treatment are shown in the following table.
TABLE 1 treatment effect of the red mud storehouse ecological restoration treatment method
Note: and measuring the organic matter content in the soil by adopting an oil bath heating potassium dichromate method to measure the organic matter content in the dry soil.
As can be seen from the above table, the red mud land restored by the red mud reservoir ecological restoration and treatment method of the invention has moderate pH value, lower soil volume weight and rich organic matters, and can provide sufficient nutrients for plant growth. In addition, the ecological restoration treatment method for the red mud warehouse can better maintain the granular structure in the soil of the red mud land after restoration treatment, can not cause soil hardening, and is beneficial to plant growth.
Claims (10)
1. The soil remediation improver for red mud bank remediation is characterized by comprising the following components in parts by weight: the composition comprises the following components in parts by weight: 5-15 parts of desulfurized gypsum, 50-90 parts of biomass material and 60-80 parts of fertilizer; the biomass material is at least one of bagasse, straw and biomass sawdust.
2. The soil remediation improver for red mud bank remediation according to claim 1, which is characterized in that: also comprises 20-30 parts of ferrous sulfate.
3. The soil remediation improver for red mud bank remediation according to claim 1, which is characterized in that: the biological agent also comprises 2-5 parts of a microbial agent, wherein the microbial agent is at least one of photosynthetic bacteria and yeast.
4. The soil remediation improver for red mud bank remediation according to claim 1, which is characterized in that: also comprises 30-50 parts of ammoniated humic acid.
5. The soil remediation improver for red mud bank remediation according to any one of claims 1 to 4, characterized in that: the fertilizer is at least one of a chemical fertilizer and an organic fertilizer.
6. The soil remediation improver for red mud bank remediation according to claim 5, which is characterized in that: the fertilizer is obtained by mixing a chemical fertilizer and an organic fertilizer according to the mass ratio of (1-3) to (1-3).
7. The soil remediation improver for red mud bank remediation according to claim 6, which is characterized in that: the fertilizer is a phosphate fertilizer.
8. The preparation method of the soil remediation improver for red mud bank remediation according to claim 1, characterized by comprising the following steps:
1) uniformly mixing the biomass material with the fertilizer to obtain a mixture;
2) and (2) uniformly mixing the mixture obtained in the step 1) with the desulfurized gypsum to obtain the desulfurized gypsum.
9. The preparation method of the soil remediation improver for red mud depots according to claim 8, wherein the mixture obtained in step 2) is uniformly mixed with the desulfurized gypsum, and then ammoniated humic acid is added and uniformly mixed.
10. The method for ecological restoration and treatment of the red mud reservoir is characterized by comprising the following steps: leveling the red mud, carrying out rotary tillage, then spreading the soil remediation improver for red mud bank remediation of claim 1 on a red mud land, raking uniformly, watering, and curing for 15-30 days; planting the restoration plants and watering.
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