CN111264113A - Modified fly ash material for improving desertified land, composite material and improvement method - Google Patents
Modified fly ash material for improving desertified land, composite material and improvement method Download PDFInfo
- Publication number
- CN111264113A CN111264113A CN202010159334.9A CN202010159334A CN111264113A CN 111264113 A CN111264113 A CN 111264113A CN 202010159334 A CN202010159334 A CN 202010159334A CN 111264113 A CN111264113 A CN 111264113A
- Authority
- CN
- China
- Prior art keywords
- fly ash
- acid solution
- modified fly
- modified
- desertified land
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- A01G24/22—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing plant material
-
- 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
- A01G24/28—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing peat, moss or sphagnum
-
- 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
-
- 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
- A01G24/40—Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure
- A01G24/44—Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure in block, mat or sheet form
- A01G24/46—Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure in block, mat or sheet form multi-layered
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/04—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only applied in a physical form other than a solution or a grout, e.g. as granules or gases
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/06—Calcium compounds, e.g. lime
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2105/00—Erosion prevention
Abstract
The invention discloses a modified fly ash material for modifying desertified land, a composite material and a modification method, wherein the modified fly ash material is prepared by performing neutralization reaction on fly ash and sulfuric acid solution, so that on one hand, heavy metal elements such as arsenic, cadmium, lead and the like in the fly ash are dissolved out and removed in an acid environment, and the content of heavy metal pollutants in the fly ash is greatly reduced, thereby being safely used for modifying desertified land in large quantities; on the other hand, the fly ash is modified by a sulfuric acid solution, calcium oxide in the fly ash reacts with sulfuric acid to generate calcium sulfate sediment which is attached to the particle surface of the fly ash, so that the water permeability of the fly ash is reduced, and the water retention capacity of the fly ash is improved; the composite material for improving the desertified land provided by the invention contains the modified fly ash material for improving the desertified land; the modified fly ash material or the composite material is used in the method for modifying the desertification land, and has the advantages of low material pollution, good water retention, good modification effect and the like.
Description
Technical Field
The invention relates to the technical field of desertification land transformation, in particular to a modified fly ash material for desertification land transformation, a composite material and a transformation method.
Background
Land desertification is a serious problem in water-deficient areas, and the modes of modification of desertified land usually include: irrigating by water diversion, planting plants to improve soil, and adding materials to soil to change its physical, chemical properties or structure.
The method of using fly ash as soil improvement material is a precedent, and the prior art mainly adopts a method of directly adding fly ash, namely: the fly ash is mixed with soil and other substances according to a certain proportion, so that the soil is loosened, and the growth conditions of plants are improved.
However, the above method of directly adding fly ash has the following problems: 1) the fly ash has strong alkalinity, generally has high content of heavy metals such as arsenic, cadmium, lead and the like, and easily causes environmental pollution which is difficult to bear if a large amount of fly ash enters soil, so that the fly ash can be only used for soil improvement in a small adding amount mode at present, for example, the current 'pollutant control standard in agricultural fly ash' (GB8173-87) clearly stipulates that 'the accumulated application amount per mu of land is not more than 30 t', the thickness of a cultivated layer per mu of land is 60cm, and the volume weight of the soil is 1.6t/m3Calculating that the total mass of the soil of the plough layer per mu of land is about 640t, and the doping proportion of the fly ash which is allowed to be doped at most is only 4.7 percent; 2) the fly ash has strong water permeability and poor water retention performance, can only be suitable for the transformation of clay soil, and if the fly ash is applied to sandy soil entering arid areas, the soil is inevitably dried further, so that the fly ash cannot play a beneficial role in the transformation of the desertification environment.
In conclusion, the existing method for directly adding fly ash has the risk of environmental pollution, cannot be used in a mode of large adding amount in soil improvement, and is particularly not suitable for the reclamation of desertification lands due to strong water permeability and poor water retention property. Therefore, how to develop a material suitable for modifying desertified land by utilizing fly ash becomes a problem to be solved urgently.
Disclosure of Invention
In view of the above, the invention discloses a modified fly ash material for desertification land reconstruction, a composite material and a reconstruction method, which at least solve the problems existing in the existing method for reconstructing desertification land by directly doping fly ash: easy environmental pollution, no addition in large amount in soil improvement, strong water permeability, poor water retention and the like.
The invention provides a modified fly ash material for modifying desertified land, which is prepared by the following steps:
1) acid leaching: mixing the fly ash with an acid solution, and carrying out a neutralization reaction until the pH value of the solution after the reaction is less than 7;
2) solid-liquid separation: performing solid-liquid separation on the mixture reacted in the step 1) by adopting a mechanical separation mode to obtain separated fly ash and a separated acid solution;
3) rinsing: rinsing the fly ash separated in the step 2) by using clean water, and then performing solid-liquid separation by using a mechanical separation mode again to obtain a rinsing solution and modified fly ash;
the acid solution contains sulfuric acid solution.
Preferably, the mechanical separation mode in the step 2) and the step 3) is one of gravity settling separation, centrifugation, vacuum filtration or filter pressing.
Further preferably, the acid solution separated in step 2) and the rinsing solution in step 3) are both recycled as the acid solution in step 1).
Further preferably, Ca (OH) is added to a part of the acid solution in the step 1), the acid solution separated in the step 2) and/or the rinsing solution in the step 3)2And/or tannic acid, forming precipitates of heavy metals (arsenic, cadmium and the like) and rare metals (germanium and gallium) in the solution, carrying out solid-liquid separation, and adding the separated liquid into the acid solution in the step 1) again for recycling.
The invention also provides a composite material for improving the desertified land, which consists of a modified fly ash material and an admixture;
the modified fly ash material is the modified fly ash material, and the content of the modified fly ash material is more than or equal to 50% in percentage by weight.
Preferably, the admixture is one or more of inorganic fertilizer, organic fertilizer, humic acid, polyacrylamide, crushed straw, sandy soil or metal ore dressing tailings.
In addition, the invention also provides a method for transforming the desertified land, which comprises the following steps: laying a water-retaining layer on the desertified land, and covering a soil layer and a sand layer on the upper surface of the water-retaining layer;
the water-retaining layer is made of the modified fly ash material or the composite material for modifying desertified land.
Preferably, the thickness of the water retention layer is 0.1-5 m; the thickness of the soil and sand layer is 0.1-5 m.
According to the modified fly ash material for improving the desertified land, the fly ash and a sulfuric acid solution are subjected to a neutralization reaction, so that on one hand, heavy metal elements (arsenic, cadmium, lead and the like), rare elements (germanium or gallium) and aluminum elements in the fly ash are dissolved out in an acid environment and are removed from a fly ash solid phase, and the dissolved metal elements are enriched and recovered in the form of precipitates, so that not only is resources recovered, but also the pollution to the environment is reduced, and therefore, the use amount of the fly ash in the desertified land improvement can be greatly increased; on the other hand, the fly ash is modified by a sulfuric acid solution, calcium oxide in the fly ash reacts with sulfuric acid to generate calcium sulfate sediment which is attached to the particle surface of the fly ash, so that the water permeability of the fly ash is reduced, the water retention capacity of the fly ash is improved, and the problems existing in the conventional method for modifying the desertified land by directly doping the fly ash are effectively solved: the pollution to the environment, the inability to add in large quantities in soil improvement, strong water permeability, poor water retention and the like.
The composite material for improving the desertified land, provided by the invention, contains the modified fly ash material and the admixture for improving the desertified land, and the physical and chemical properties of the modified fly ash material, such as nutrient, water retention, shearing resistance, erosion resistance and the like, are changed correspondingly according to the difference of the admixture, so that the composite material can meet different requirements of various specific use environments when being used in the method for improving the desertified land.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Detailed Description
The present invention is further illustrated by the following specific embodiments, but is not intended to limit the scope of the present invention.
Aiming at solving the problems that the existing method for modifying the desertified land by directly adding fly ash comprises the following steps: the pollution to the environment, the inability to add in large quantities in soil improvement, strong water permeability, poor water retention and the like. The embodiment provides a modified fly ash material for modifying desertified soil, a composite material and a modification method, wherein the modified fly ash material and the composite material not only have reduced heavy metal content and reduced alkalinity, but also have greatly improved water retention property of the modified fly ash, so that the modified desertified soil is more suitable for plant growth, and the preparation method of the material comprises the following steps:
1) acid leaching: mixing the fly ash and an acid solution, and carrying out a neutralization reaction until the pH value of the solution after the reaction is less than 7, wherein the acid solution contains a sulfuric acid solution, the step is that heavy metal elements (arsenic, cadmium, lead and the like), rare-earth elements (germanium or gallium) and aluminum elements in the fly ash are dissolved out in an acid environment and dissolved in the solution by adding the sulfuric acid solution, and calcium sulfate generated after the reaction of the sulfuric acid solution and calcium oxide in the fly ash is attached to the surfaces of fly ash particles, so that the water permeability of the fly ash is reduced, and the water retention is improved;
2) solid-liquid separation: carrying out solid-liquid separation on the solution reacted in the step 1) by adopting a mechanical separation mode to obtain separated fly ash, and thoroughly removing arsenic, cadmium, lead and other heavy metal elements dissolved in the solution and aluminum and other metal elements from the solid-phase fly ash by adopting a solid-liquid separation mode;
3) rinsing: rinsing the fly ash separated in the step 2) by using clean water, and then performing solid-liquid separation by using a mechanical separation mode again to obtain a rinsing solution and the modified fly ash, wherein the acid solution remained on the surface of the fly ash can be rinsed through the rinsing step, so that the influence on land improvement and use is avoided.
The acid solution in step 1) may be only sulfuric acid in theory, or may be a mixed acid of sulfuric acid and oxalic acid, citric acid, or other acids, where the specific added acidic component may be selected according to actual conditions, for example, oxalic acid may be added to the sulfuric acid to improve the dissolution rate of arsenic or other heavy metal elements in the fly ash.
The mechanical separation method in the above step 2) and step 3) may be any method as long as the purpose of solid-liquid separation can be achieved, for example: gravity settling separation, centrifugation, vacuum filtration or filter pressing.
In order to save the use amount of the acid solution and reduce the preparation cost of the modified fly ash, the acid solution separated in the step 2) and the rinsing solution in the step 3) are preferably recycled as the acid solution in the step 1).
As the acid solution generated after the neutralization reaction of the fly ash is rich in a large amount of arsenic and other heavy metal elements and also contains valuable elements such as aluminum, germanium, gallium and the like, in order to avoid the excessive accumulation of the elements caused by the circulation process of the acid solution, as an improvement of the technical scheme, part of the acid solution in the step 1), the acid solution separated in the step 2) and/or the rinsing solution in the step 3) is added with Ca (OH)2And (2) reacting heavy metals (arsenic, cadmium and the like) and rare metals (germanium, gallium) in the solution with the chemical agent to form a precipitate after tannic acid or other chemical agents, separating and recovering the precipitate from the acid solution after solid-liquid separation, and adding the separated liquid into the acid solution in the step 1) again for recycling.
Based on the development of the modified fly ash material in the above embodiment, the embodiment provides a composite material for improving desertified land, which is formed by mixing and doping other admixtures for improving nutrients and shear and erosion resistance into the modified fly ash material, wherein the mass (dry basis) of the admixtures is less than that of the modified fly ash material, and the admixtures can be: inorganic fertilizer, organic fertilizer, humic acid, Polyacrylamide (PAM), crushed straw or other plants rich in fiber, sandy soil, metal ore dressing tailings and other materials.
The addition amount of the admixture in the composite material is determined according to the specific situation of improving the composite material nutrient and the parameters of shearing resistance and erosion resistance, such as: chemical fertilizers such as potassium fertilizer, nitrogen fertilizer, phosphate fertilizer and the like or organic fertilizers consisting of livestock and poultry excrement, biogas slurry and residues thereof and biochemical sludge can be added to improve the nutrients of the composite material, PAM or crushed straws can be added to enhance the shear resistance and erosion resistance of the composite material, and the porosity, the porosity and the air permeability of the composite material can be adjusted by adding sandy soil.
Based on the modified fly ash material and the composite material for modifying the desertified land, the embodiment provides a method for modifying the desertified land, which comprises the following steps: laying a water-retaining layer on the desertified land, and covering soil and a sand layer on the upper surface of the water-retaining layer, wherein the components of the water-retaining layer are the modified fly ash material or the composite material for the desertified land improvement provided in the embodiment.
In the modification method, a loose layer with high porosity can be constructed between the upper surface of the water-retaining layer and the ground surface by paving the water-retaining layer for absorbing and accumulating subsurface seepage water and blocking the subsurface seepage water as much as possible from permeating towards the lower part of the water-retaining layer, so that the water-retaining layer is prevented from being directly exposed in the air to form strong evaporation, and the water-retaining layer is used for conveying water to the ground surface due to strong capillary action and evaporating to cause water loss of the water-retaining layer, thereby realizing the modification of desertification land and enabling the desertification land to be suitable for the growth of plants, wherein the thickness of the water-retaining layer is preferably 0.1-5 m; the thickness of the soil and sand layer is 0.1-5 m.
In order to verify the actual performance of the modified fly ash material in the above embodiment, the performance tests before and after modification of the fly ash of the inner Mongolia are respectively carried out, specifically as follows:
before modification: mixing dry fly ash and water according to a solid-to-liquid ratio of 1:2, releasing and draining gravity water for 4 hours, wherein the water content (mass ratio) of wet fly ash is 35.3%; when the above wet fly ash is naturally accumulated, the permeability coefficient of the wet fly ash is measured to be 7.46X 10-2cm/s; the method comprises the following steps of taking wet fly ash before modification with the volume of 12.57 liters, placing the wet fly ash into a vertically placed PVC (polyvinyl chloride) material pipe with the diameter of 20cm, the height of 40cm and the closed lower end and the open upper end, wherein the inner space of the PVC pipe is filled with the wet fly ash, the upper surface of the wet fly ash is flush with the upper end opening of the PVC pipe, placing the wet fly ash for 15d (360 hours) under the indoor condition of the temperature of 25 ℃ and the relative humidity of 35%, reducing the water content (mass ratio) of the wet fly ash from 35.3% to 21.7%, and enabling the water evaporation loss to.
After modification: carrying out acid leaching for 2 hours, solid-liquid separation, rinsing with clear water and solid-liquid separation again on the fly ash by adopting 10% sulfuric acid according to the solid-liquid mass ratio of 1:3 to form a modified fly ash material (wet state), wherein after releasing and losing gravity water for 4 hours, the water content (mass ratio) of the wet fly ash is 42.7%, and is improved by 7.4% compared with that before modification; when the wet modified fly ash material is naturally stacked, the permeability coefficient is measured to be 1.66 multiplied by 10-4cm/s, the permeability coefficient is greatly reduced compared with that before modification, and is only 0.22 percent of that before modification; the modified fly ash material (wet state) with the same volume of 12.57 liters is taken and placed in a vertically placed PVC material pipe with the diameter of 20cm, the height of 60cm and the closed lower end and the open upper end to form a modified fly ash material (wet state) cylinder with the height of 40cm, fine sand with the height of 20cm is covered on the upper surface of the modified fly ash material (wet state) cylinder, the upper surface of a fine sand covering layer is kept flat with the upper end of the PVC pipe, the modified fly ash material (wet state) cylinder is placed for 15d (360 hours) under the indoor condition of the temperature of 25 ℃ and the relative humidity of 35 percent, the water content (mass ratio) of the wet fly ash is reduced from 42.7 percent to 39.6 percent, the water evaporation loss is 12.0 percent, and is greatly reduced.
The results of the experiments summarize: compared with the fly ash before modification, the formed modified fly ash material can accumulate more water and has lower permeability coefficient, is a good water retention material, and when a structure that the modified fly ash material water retention layer is paved at the lower part and the sand layer is covered at the upper part is formed, the water evaporation loss speed of the modified fly ash material water retention layer is greatly reduced. Therefore, the modified fly ash material and the modification method developed by the application can realize the effects of better accumulating moisture, preventing the moisture from infiltration loss and preventing the loss of a large amount of moisture by evaporation in use, and are suitable for the modification of the desertification land.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. The modified fly ash material for improving the desertified land is characterized by being prepared by the following steps:
1) acid leaching: mixing the fly ash with an acid solution, and carrying out a neutralization reaction until the pH value of the solution after the reaction is less than 7;
2) solid-liquid separation: performing solid-liquid separation on the mixture reacted in the step 1) by adopting a mechanical separation mode to obtain separated fly ash and a separated acid solution;
3) rinsing: rinsing the fly ash separated in the step 2) by using clean water, and then performing solid-liquid separation by using a mechanical separation mode again to obtain a rinsing solution and modified fly ash;
the acid solution contains sulfuric acid solution.
2. The modified fly ash material for modifying the desertified land as claimed in claim 1, wherein the mechanical separation mode in the step 2) and the step 3) is one of gravity settling separation, centrifugation, vacuum filtration or filter pressing.
3. The modified fly ash material for reclamation of desertified land as claimed in claim 1, wherein the acid solution separated in the step 2) and the rinsing solution in the step 3) are both recycled as the acid solution in the step 1).
4. The modified fly ash material for reclamation of desertified land as claimed in claim 3, wherein Ca (OH) is added to a part of the acid solution in the step 1), the acid solution separated in the step 2) and/or the rinsing solution in the step 3)2And/or tannic acid, generating precipitate, performing solid-liquid separation, and adding the separated liquid into the acid solution in the step 1) again for recycling.
5. The composite material for improving the desertified land is characterized by consisting of a modified fly ash material and an admixture;
the modified fly ash material is the modified fly ash material in claims 1-4, and the content of the modified fly ash material is greater than or equal to 50% by weight.
6. The composite material for reclamation of desertified land as claimed in claim 5, wherein the admixture is one or more of inorganic fertilizer, organic fertilizer, humic acid, polyacrylamide, crushed straw, sandy soil or metal ore dressing tailings.
7. A method for modifying desertified land is characterized by comprising the following steps: laying a water-retaining layer on the desertified land, and covering a soil layer and a sand layer on the upper surface of the water-retaining layer;
the water-retaining layer comprises the modified fly ash material of claims 1 to 4 or the composite material of claims 5 and 6.
8. A reclamation method as claimed in claim 7, wherein said water-retaining layer has a thickness of from 0.1 to 5 m; the thickness of the soil and sand layer is 0.1-5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010159334.9A CN111264113A (en) | 2020-03-09 | 2020-03-09 | Modified fly ash material for improving desertified land, composite material and improvement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010159334.9A CN111264113A (en) | 2020-03-09 | 2020-03-09 | Modified fly ash material for improving desertified land, composite material and improvement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111264113A true CN111264113A (en) | 2020-06-12 |
Family
ID=70991396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010159334.9A Pending CN111264113A (en) | 2020-03-09 | 2020-03-09 | Modified fly ash material for improving desertified land, composite material and improvement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111264113A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276815A (en) * | 2020-09-27 | 2022-04-05 | 中国科学院过程工程研究所 | Preparation method of modified fly ash, modified fly ash prepared by preparation method and application of modified fly ash |
| CN114874054A (en) * | 2021-02-05 | 2022-08-09 | 中国科学院过程工程研究所 | Desert sandy soil conditioner and preparation method and application thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884434A (en) * | 2006-06-09 | 2006-12-27 | 中国矿业大学(北京) | Modified clay base water-guiding materials and process for preparing same |
| CN101376094A (en) * | 2008-10-13 | 2009-03-04 | 郑州航空工业管理学院 | Method for preparing modified coal ash phosphorus sorbent and uses thereof |
| CN101492187A (en) * | 2009-03-09 | 2009-07-29 | 中国科学院地球化学研究所 | Method for treating antimony ore beneficiation wastewater with modified coal ash |
| CN101695649A (en) * | 2009-11-09 | 2010-04-21 | 湖南大学 | Modified flyash as well as preparation method and application thereof in urban sludge conditioning |
| CN102964802A (en) * | 2012-11-14 | 2013-03-13 | 安徽江威精密制造有限公司 | Rubber capacitor case packaging material with thermal shock resistance |
| CN104209088A (en) * | 2014-09-24 | 2014-12-17 | 陕西华陆化工环保有限公司 | Preparation method of modified fly ash used for absorbing nitrophenol in waste water |
| CN106000288A (en) * | 2016-06-17 | 2016-10-12 | 广东省资源综合利用研究所 | Preparing method of rare-earth-carried modified fly ash |
| CN106076248A (en) * | 2016-06-17 | 2016-11-09 | 广东省资源综合利用研究所 | A kind of preparation method of rare earth modified flyash |
| CN107903105A (en) * | 2017-11-08 | 2018-04-13 | 马鞍山菌菌食品科技有限公司 | A kind of biogas residue organic fungi-manure and preparation method thereof |
| CN109603738A (en) * | 2019-01-16 | 2019-04-12 | 谢天宇 | A kind of application of flyash modified method and modified coal ash |
-
2020
- 2020-03-09 CN CN202010159334.9A patent/CN111264113A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884434A (en) * | 2006-06-09 | 2006-12-27 | 中国矿业大学(北京) | Modified clay base water-guiding materials and process for preparing same |
| CN101376094A (en) * | 2008-10-13 | 2009-03-04 | 郑州航空工业管理学院 | Method for preparing modified coal ash phosphorus sorbent and uses thereof |
| CN101492187A (en) * | 2009-03-09 | 2009-07-29 | 中国科学院地球化学研究所 | Method for treating antimony ore beneficiation wastewater with modified coal ash |
| CN101695649A (en) * | 2009-11-09 | 2010-04-21 | 湖南大学 | Modified flyash as well as preparation method and application thereof in urban sludge conditioning |
| CN102964802A (en) * | 2012-11-14 | 2013-03-13 | 安徽江威精密制造有限公司 | Rubber capacitor case packaging material with thermal shock resistance |
| CN104209088A (en) * | 2014-09-24 | 2014-12-17 | 陕西华陆化工环保有限公司 | Preparation method of modified fly ash used for absorbing nitrophenol in waste water |
| CN106000288A (en) * | 2016-06-17 | 2016-10-12 | 广东省资源综合利用研究所 | Preparing method of rare-earth-carried modified fly ash |
| CN106076248A (en) * | 2016-06-17 | 2016-11-09 | 广东省资源综合利用研究所 | A kind of preparation method of rare earth modified flyash |
| CN107903105A (en) * | 2017-11-08 | 2018-04-13 | 马鞍山菌菌食品科技有限公司 | A kind of biogas residue organic fungi-manure and preparation method thereof |
| CN109603738A (en) * | 2019-01-16 | 2019-04-12 | 谢天宇 | A kind of application of flyash modified method and modified coal ash |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276815A (en) * | 2020-09-27 | 2022-04-05 | 中国科学院过程工程研究所 | Preparation method of modified fly ash, modified fly ash prepared by preparation method and application of modified fly ash |
| CN114874054A (en) * | 2021-02-05 | 2022-08-09 | 中国科学院过程工程研究所 | Desert sandy soil conditioner and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hylander et al. | Phosphorus retention in filter materials for wastewater treatment and its subsequent suitability for plant production | |
| Geiger et al. | Changes in a sandy Sahelian soil following crop residue and fertilizer additions | |
| Fenn et al. | Ammonia loss and associated reactions of urea in calcareous soils | |
| Dowdy et al. | Movement of heavy metals in soils | |
| Nguyen et al. | Accumulation of soil sulphur fractions in grazed pastures receiving long-term superphosphate applications | |
| Vlahos et al. | Reducing phosphorus leaching from sandy soils with red mud bauxite processing residues | |
| CN111264113A (en) | Modified fly ash material for improving desertified land, composite material and improvement method | |
| CN110899317A (en) | Cadmium-polluted farmland soil remediation method based on magnetic biochar | |
| CN106034458B (en) | It is a kind of to prevent and treat the method that red mud dump produces airborne dust and environmental pollution | |
| CN104262059A (en) | Method of utilizing electrolytic manganese residue to improve red mud land | |
| CN107090297A (en) | A kind of heavy metal polluted soil of farmland renovation agent and its preparation method and application | |
| CN108929693A (en) | A kind of soil heavy metal combined passivator and its application method | |
| CN109877143B (en) | Straw waste recycling treatment method and adsorbent | |
| CN111492937A (en) | Application of river channel solid waste in spongy soil and preparation method of spongy soil | |
| Ho et al. | Leachate quality from gypsum neutralized red mud applied to sandy soils | |
| JPH0726260A (en) | Production of soil conditioner | |
| Ruan et al. | Phosphorus accumulation in farm ponds and dams in Southwestern Australia | |
| CN107960168A (en) | A kind of greening method of high water level strand barged-in fill | |
| Zewd et al. | The effects of alkalinity on physical and chemical properties of soil | |
| Logan et al. | The effects of reduced tillage on phosphate transport from agricultural land | |
| Cucarella et al. | Recycling of calcium-silicate material after wastewater filtration to agriculture-Soil condition impact | |
| CN113089691B (en) | Landscape reconstruction-based high and steep hard slope restoration system and restoration method thereof | |
| Tishmack et al. | Use of coal combustion by-products to reduce soil erosion | |
| Brinkman | Mineralogy and surface properties of the clay fraction affecting soil behavior and management | |
| CN101417851A (en) | Method for reducing heavy metal biological effectiveness in activated sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200612 |