CN110885689A - Mining area soil composite improver and mining area soil improvement method - Google Patents
Mining area soil composite improver and mining area soil improvement method Download PDFInfo
- Publication number
- CN110885689A CN110885689A CN201911153988.4A CN201911153988A CN110885689A CN 110885689 A CN110885689 A CN 110885689A CN 201911153988 A CN201911153988 A CN 201911153988A CN 110885689 A CN110885689 A CN 110885689A
- Authority
- CN
- China
- Prior art keywords
- mining area
- soil
- area soil
- composite
- plants
- 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
-
- 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
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mycology (AREA)
- Botany (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a mining area soil composite improver and a mining area soil improvement method, wherein the mining area soil composite improver comprises the following components: humic acid adsorbent, organic acid and municipal sludge. The mining area soil improvement method comprises the following steps: improving the mining area soil by using the composite improver for 20-40 days; and planting plants on the improved soil of the mining area, and enriching heavy metals. The mining area soil composite improver and the mining area soil improvement method based on the invention can be used for improving the mining area soil polluted by heavy metals, and have low cost and environmental protection.
Description
Technical Field
The invention belongs to the technical field of soil remediation, and particularly relates to a mining area soil composite improver and a mining area soil improvement method.
Background
With the mass mining and smelting of mines, the local economic development is promoted, and meanwhile, a plurality of environmental problems are brought, such as heavy metal pollution, the environmental safety problem of waste land in mining areas and the like. At present, the restoration method of heavy metal polluted soil in a mining area is usually a physical and chemical method, such as a soil covering method, a soil leaching method, an electric restoration method, an inorganic modifier and organic waste adding method and the like, and although the traditional restoration method has obvious treatment effect and short duration, the traditional restoration method has the defects of high cost, difficult management and easy secondary pollution.
Disclosure of Invention
The technical problem solved by the invention is as follows: provides a mining area soil composite improver and a mining area soil improving method, which are used for improving mining area soil polluted by heavy metals, and have low cost and environmental protection.
The concrete solution is as follows:
the invention provides a mining area soil composite improver which comprises the following components: humic acid adsorbent, organic acid and municipal sludge.
According to the invention, the humic acid adsorbent is added, and has large specific surface area and functional groups such as carboxyl, carbonyl, methoxyl, phenolic hydroxyl and the like, so that the humic acid adsorbent can be adsorbed and combined with various heavy metals to generate a complex chelation reaction, thereby promoting the heavy metals to be converted to a stable state; the organic acid is added, so that heavy metal ions adsorbed in the solid phase of the soil can be activated, the bioavailability of the heavy metal is improved, and the subsequent enrichment of plants is facilitated; the method has the advantages that the municipal sludge is applied to the soil of the mining area, the soil structure of the mining area can be improved, the permeability of the soil can be enhanced, the growth of root systems and the activity of soil microorganisms are promoted, the municipal sludge contains a large amount of organic matters, organic matters can be decomposed into organic acids, the bioavailability of heavy metals can be improved, the form of the heavy metals is activated, the absorption of plants to the heavy metals is facilitated, the efficiency of restoring the soil of the mining area by the plants is improved, meanwhile, the effective utilization of discharged municipal sludge is realized, the use cost is low, and the environment is protected.
On the basis of the scheme, the invention can be further improved as follows:
further, the weight ratio of the humic acid adsorbent to the organic acid to the municipal sludge is (1-3): (1-3): (2-6).
Under the condition of the proportioning, the improvement effect of the composite modifier can be exerted to the greatest extent, and the restoration efficiency and restoration effect of the mining area soil are improved.
Further, the humic acid adsorbent is selected from any one or more of lignite, weathered coal or peat.
Further, the organic acid is selected from any one or more of malic acid, tartaric acid or oxalic acid.
The invention also provides a mining area soil improvement method, which comprises the following steps:
1) soil improvement: the composite modifying agent is used for modifying the soil of the mining area for 20 to 40 days;
2) planting plants: and planting plants on the improved soil of the mining area, and enriching heavy metals.
Based on the method, the composite modifier is used for modifying the polluted soil, the bioavailability of the heavy metal is improved, the physicochemical property of the soil is improved, the heavy metal in the polluted soil is enriched in the plant body by planting the plant, so that the heavy metal is removed, the content of the heavy metal in the mining area soil is reduced, and the method can be used for repairing the mining area soil polluted to different degrees.
Further, the improvement mode in the step 1) is that the composite modifier is uniformly mixed with the soil of the mining area or the composite modifier is directly covered on the surface layer of the soil, and then water is poured once every 3-7 days.
Before planting plants, only a composite modifier which can be fully utilized by the plants is needed to be added, and organic/inorganic agricultural and miscellaneous fertilizers are not needed to be applied, so that secondary pollution caused by excessive use of the organic agricultural and miscellaneous fertilizers is avoided; researches show that by applying the composite modifier to the soil in the mining area, the soil fertility of the mining area can be improved, the plant growth is facilitated, and the heavy metal absorption effect can be improved.
Preferably, the improvement mode in the step 1) is that the composite improver is uniformly mixed with the soil, water is poured once every 5 days, and the humidity of the mixed soil of the composite improver and the soil of the mining area is kept to be 55% -65%.
Under the condition, the improvement effect is good, and the growth of plants and the enrichment of heavy metals are facilitated.
Further, the mass ratio of the composite modifier to the mining area soil is as follows: (4-12): 10.
under the condition, better soil improvement effect and improvement efficiency can be achieved.
Further, the heavy metal in the mining area soil comprises any one or more of Cu, Zn, Pb or Cd, and the plant is selected from one or two of Commelina communis and Polygonum sordidum.
Experiments show that the dayflower and the polygonum minus are high in metal Cu, Zn, Pb and Cd resistance and high in enrichment speed, can be used for absorbing high-content heavy metals Cu, Zn, Pb and Cd in the enriched mining area soil, and are low in cost, good in remediation effect, green, environment-friendly and easy to popularize in a large range by taking the dayflower and the polygonum minus as mining area soil remediation plants; the composite modifier can effectively improve the physicochemical property of soil, is beneficial to the growth of plants, can also change the occurrence form of heavy metal, activate the heavy metal and improve the enrichment of the heavy metal by the plants; the combined effect of the composite modifier and the plant is remarkable, and the four heavy metals can be simultaneously enriched, so that the repair period is effectively shortened, and the enrichment amount of the plant to the heavy metals is increased.
Preferably, the plant planting is carried out by adopting a mixed planting mode of the dayflower and the polygonum cuspidatum.
Specifically, the municipal sludge is composted prior to application. The municipal sludge contains a large amount of organic matters, and if the municipal sludge is directly put into a natural environment, the organic matters can be continuously decomposed under the action of microorganisms, so that the environment is harmed.
Preferably, the municipal sludge is selected from sewage treatment plants.
The sludge of the sewage treatment plant is easy to obtain.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The following detailed description of embodiments of the invention is intended to be illustrative, and is not to be construed as limiting the invention.
Example 1
Uniformly mixing a humic acid adsorbent, an organic acid and municipal sludge according to a weight ratio of 3:3:2 to obtain a composite modifier, uniformly mixing the composite modifier and soil in a mining area according to a weight ratio of 8:10, wherein the total amount is 1.5kg, filling the mixture in a flowerpot with the diameter of 25cm, watering the flowerpot once every 5 days to ensure that the water amount of the composite modifier is 60% of the field water capacity, transplanting 6 dayflower plants into the flowerpot after one month, harvesting the dayflower after 90 days of growth, detecting the pH value and the organic matter content of the mixed soil, collecting root system soil, drying and weighing the harvested plants to obtain the biomass (the plant amount, which is the total dry weight of the organic matter which is actually stored and live in a unit area at a certain moment), digesting the collected root system soil, and detecting the content of heavy metals Cu, Zn, Pb and Cd.
Example 2
Uniformly mixing a humic acid adsorbent, an organic acid and municipal sludge according to a weight ratio of 3:3:4 to obtain a composite modifier, uniformly mixing the composite modifier and soil in a mining area according to a weight ratio of 10:10, wherein the total amount is 1.5kg, filling the mixture into a flowerpot with the diameter of 25cm, watering the flowerpot once every 5 days to ensure that the water amount of the composite modifier is 60% of the field water capacity, transplanting 6 dayflower plants into the flowerpot after one month, harvesting the dayflower after 90 days of growth, detecting the pH value and the organic matter content of the mixed soil, collecting root system soil, drying and weighing the harvested plants to obtain biomass, digesting the collected root system soil, and detecting the contents of heavy metals Cu, Zn, Pb and Cd.
Example 3
Uniformly mixing a humic acid adsorbent, an organic acid and municipal sludge according to a weight ratio of 3:3:6 to obtain a composite modifier, uniformly mixing the composite modifier and the soil in a mining area according to a weight ratio of 12:10, wherein the total amount is 1.5kg, filling the mixture into a flowerpot with the diameter of 25cm, watering the flowerpot once every 5 days to ensure that the water amount of the composite modifier is 60% of the field water capacity, transplanting 6 dayflower plants into the flowerpot after one month, harvesting the dayflower after 90 days of growth, detecting the pH value and the organic matter content of the mixed soil, collecting root system soil, drying and weighing the harvested plants to obtain biomass, digesting the collected root system soil, and detecting the contents of heavy metals Cu, Zn, Pb and Cd.
Example 4
Uniformly mixing a humic acid adsorbent, an organic acid and municipal sludge according to a weight ratio of 3:3:2 to obtain a composite modifier, directly covering the composite modifier on the surface layer of the soil in a mining area, wherein the weight ratio of the composite modifier to the soil in the mining area is 8:10, the total amount is 1.5kg, filling the composite modifier in a flowerpot with the diameter of 25cm, watering the flowerpot once every 5 days to keep the water amount of the composite modifier to be 60% of the field water holding capacity, transplanting 6 dayflower plants into the flowerpot after one month, harvesting after the dayflower grows for 90 days, detecting the pH value and the organic matter content of the mixed soil, collecting root system soil, drying and weighing the harvested plants to obtain biomass, digesting the collected rhizosphere soil, and detecting the contents of heavy metals Cu, Zn, Pb and Cd.
Example 5
Uniformly mixing a humic acid adsorbent, an organic acid and municipal sludge according to a weight ratio of 3:3:2 to obtain a composite modifier, uniformly mixing the composite modifier and soil in a mining area according to a weight ratio of 8:10, wherein the total amount is 1.5kg, filling the composite modifier into a flowerpot with the diameter of 25cm, watering the flowerpot once every 5 days to keep the water amount of the composite modifier to be 60% of the field water holding capacity, transplanting 3 dayflower and polygonum sorgholium plants into the flowerpot after one month, harvesting after the plants grow for 90 days, detecting the pH value of the mixed soil and the content of organic matters, collecting root system soil, drying and weighing the harvested plants to obtain the biomass, digesting the collected root system soil, and detecting the content of heavy metals Cu, Zn, Pb and Cd.
Example 6
Uniformly mixing a humic acid adsorbent, an organic acid and municipal sludge according to a weight ratio of 3:3:2 to obtain a composite modifier, directly covering the composite modifier on the surface layer of soil, wherein the weight ratio of the composite modifier to the soil in a mining area is 8:10, the total amount is 1.5kg, filling the composite modifier in a flowerpot with the diameter of 25cm, watering the composite modifier once every 5 days to ensure that the water amount of the composite modifier is 60% of the field water capacity, transplanting 3 dayflower and polygonum cuspidatum plants into the flowerpot after one month, harvesting after the plants grow for 90 days, detecting the pH value and the content of organic matters of the mixed soil, collecting root system soil, drying the harvested plants, weighing the biomass of the plants, digesting the collected rhizosphere soil, and detecting the content of heavy metals Cu, Zn, Pb and Cd.
Comparative example 1
The soil of the mining area is improved and repaired in a similar way as in example 1, except that: no composite modifier and no plant.
Comparative example 2
The soil in the mining area was improved and restored in a similar manner to example 1, except that no plants were planted.
Comparative example 3
The soil in the mining area was improved and restored in a similar manner to example 2, except that no plants were planted.
Comparative example 4
The soil in the mining area was improved and restored in a similar manner to example 3, except that no plants were planted.
Comparative example 5
The soil of the mining area is improved and repaired by a method similar to that of the example 3, except that the dayflower is only planted and the compound improver is not added.
The data measured in examples 1 to 6 and comparative examples 1 to 5 are shown in the following table 1:
table 1: test results
| Item | pH | Organic matter (g/kg) | Biomass (g) | Cu(mg/kg) | Zn(mg/kg) | Pb(mg/kg) | Cd(mg/kg) |
| Comparative example 1 | 6.84 | 10.16 | - | 800.10 | 603.00 | 390.75 | 71.35 |
| Comparative example 2 | 6.78 | 46.34 | - | 822.12 | 608.07 | 398.70 | 55.97 |
| Comparative example 3 | 6.70 | 63.67 | - | 834.60 | 614.74 | 408.34 | 56.89 |
| Comparative example 4 | 6.64 | 84.86 | - | 851.15 | 619.42 | 419.30 | 68.17 |
| Comparative example 5 | 6.81 | 9.16 | 0.2745 | 789.30 | 592.49 | 382.42 | 68.96 |
| Example 1 | 6.62 | 29.91 | 0.6495 | 749.83 | 564.32 | 367.34 | 64.11 |
| Example 2 | 6.59 | 45.43 | 0.5673 | 757.82 | 579.77 | 378.92 | 65.82 |
| Example 3 | 6.57 | 57.89 | 0.4789 | 779.78 | 589.30 | 374.95 | 67.53 |
| Example 4 | 6.74 | 44.56 | 0.3482 | 783.30 | 591.81 | 377.42 | 67.56 |
| Example 5 | 6.61 | 25.91 | 0.9945 | 724.89 | 546.62 | 349.83 | 63.41 |
| Example 6 | 6.69 | 43.46 | 0.4252 | 779.35 | 587.84 | 374.92 | 65.73 |
As can be seen from the data analysis in Table 1, the contents of heavy metals in the contaminated soils in examples 1 to 6 were all reduced to different degrees as compared with those in comparative examples 1 to 5. The composite modifying agent can adsorb heavy metals in the mining area soil, so that the mining area soil can be repaired.
Examples 1, 2, 3, 4, 5 and 6 can promote the enrichment of plants on heavy metals, and the organic matter content is obviously higher than that of comparative example 1, which shows that the application of the composite improver increases the fertility of the soil of the mining area.
The heavy metal data of examples 1, 2 and 3 show that the three can remove heavy metals in polluted soil to different degrees, and example 1 shows that when the ratio of humic acid adsorbent, organic acid and municipal sludge in the composite modifier is 3:3:2, the ratio of the composite modifier to the mining area soil is 8: the best effect is obtained in 10.
According to the heavy metal data of rhizosphere soil in the embodiments 1 and 4 and the embodiments 5 and 6, the application mode of the municipal sludge has different influences on the heavy metal enrichment of plants, the experimental effect of the embodiment 1 is better than that of the embodiment 4, the experimental effect of the embodiment 5 is better than that of the embodiment 6, the soil conditioner and the mining area soil are uniformly mixed and then subjected to subsequent treatment, and the repairing effect of the composite conditioner and the plants on the mining area soil can be obviously improved.
Comparative example 2, example 1 and example 5 in the table show that the planting mode of the plants has different effects on the enrichment of the plants with heavy metals, and the experimental effect of example 5 is better than that of example 1 with single-plant planting and comparative example 2 without plants. The adoption of the dayflower and the polygonum cuspidatum can obviously improve the remediation effect on the soil containing heavy metals in mining areas.
Research also finds that the embodiment 1-6 added with the composite modifier has obviously higher void degree and filling power of mixed soil than the comparative example 5 without the composite modifier when plants are harvested, and the composite modifier based on the invention obviously improves the soil structure of a mining area, enhances the permeability of the mining area, and promotes the growth of root systems and the activity of soil microorganisms.
Although embodiments of the present invention have been described in detail above, those of ordinary skill in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The mining area soil composite improver is characterized by comprising the following components: humic acid adsorbent, organic acid and municipal sludge.
2. The mining area soil composite improver according to claim 1, wherein the weight ratio of the humic acid adsorbent to the organic acid to the municipal sludge is (1-3): (1-3): (2-6).
3. The mining area soil composite improver according to claim 1, wherein the humic acid adsorbent is selected from any one or more of lignite, weathered coal or peat.
4. A composite amendment for mine soil according to any one of claims 1 to 3, wherein the organic acid is selected from any one or more of malic acid, tartaric acid or oxalic acid.
5. A mining area soil improvement method is characterized by comprising the following steps:
1) soil improvement: improving the mining area soil for 20-40 days by using the composite improver as claimed in any one of claims 1-4;
2) planting plants: and planting plants on the improved soil of the mining area, and enriching heavy metals.
6. The mining area soil improvement method according to claim 5, characterized in that the improvement mode in the step 1) is that the composite modifier is firstly mixed with the soil uniformly or directly covered on the surface layer of the soil, and then water is poured once every 3-7 days.
7. The mining area soil improvement method according to claim 5, wherein the mass ratio of the composite improver to the mining area soil is (4-12): 10.
8. the method for improving the soil of a mining area as claimed in any one of claims 5 to 7, wherein the heavy metals in the mining area soil comprise any one or more of Cu, Zn, Pb or Cd, and the plants are selected from one or two of Commelina communis and Polygonum sordidum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911153988.4A CN110885689A (en) | 2019-11-22 | 2019-11-22 | Mining area soil composite improver and mining area soil improvement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911153988.4A CN110885689A (en) | 2019-11-22 | 2019-11-22 | Mining area soil composite improver and mining area soil improvement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110885689A true CN110885689A (en) | 2020-03-17 |
Family
ID=69748388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911153988.4A Pending CN110885689A (en) | 2019-11-22 | 2019-11-22 | Mining area soil composite improver and mining area soil improvement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110885689A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111438175A (en) * | 2020-04-13 | 2020-07-24 | 中南林业科技大学 | Method for repairing manganese ore slag by combining modifier and plants |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827613A (en) * | 2012-08-31 | 2012-12-19 | 中国农业大学 | Rhizosphere regulating agent for increasing phytoremediation efficiency and application thereof |
| CN103521508A (en) * | 2013-09-30 | 2014-01-22 | 中国农业科学院农田灌溉研究所 | Phytoremediation method for soil with cadmium pollution |
| CN104550208A (en) * | 2013-10-12 | 2015-04-29 | 中环循(北京)环境技术中心 | Farmland soil heavy metal pollution restoration method through coupling activating and passivating |
| CN108580534A (en) * | 2018-05-24 | 2018-09-28 | 益阳创惠技术服务有限公司 | A method of utilizing flower plant of common fouroclock restoration of soil polluted by heavy metal |
-
2019
- 2019-11-22 CN CN201911153988.4A patent/CN110885689A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827613A (en) * | 2012-08-31 | 2012-12-19 | 中国农业大学 | Rhizosphere regulating agent for increasing phytoremediation efficiency and application thereof |
| CN103521508A (en) * | 2013-09-30 | 2014-01-22 | 中国农业科学院农田灌溉研究所 | Phytoremediation method for soil with cadmium pollution |
| CN104550208A (en) * | 2013-10-12 | 2015-04-29 | 中环循(北京)环境技术中心 | Farmland soil heavy metal pollution restoration method through coupling activating and passivating |
| CN108580534A (en) * | 2018-05-24 | 2018-09-28 | 益阳创惠技术服务有限公司 | A method of utilizing flower plant of common fouroclock restoration of soil polluted by heavy metal |
Non-Patent Citations (6)
| Title |
|---|
| 宋立杰等: "《农用地污染土壤修复技术》", 31 January 2019, 冶金工业出版社 * |
| 方星等: "《矿山土地复垦理论与方法》", 31 August 2015, 地质出版社 * |
| 王红旗等: "《污染土壤植物-微生物联合修复技术及应用》", 30 September 2015, 中国环境出版社 * |
| 王荫槐: "《土壤肥料学》", 31 May 1992, 农业出版社 * |
| 蔡湘文等: "《外源有机酸和肥料对李氏禾富集铬的影响及其栽培生物态条件研究》", 30 June 2016, 地质出版社 * |
| 马越等: "《现代生物技术概论》", 31 January 2015, 中国轻工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111438175A (en) * | 2020-04-13 | 2020-07-24 | 中南林业科技大学 | Method for repairing manganese ore slag by combining modifier and plants |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105542775B (en) | A kind of passivator and its application for faintly acid cadmium pollution soil | |
| CN101724404B (en) | Heavy metal contaminated soil conditioner and plant and chemistry combined remediation method | |
| CN102630474B (en) | Method for repairing garbage compost heavy metal by adopting NTA (Nitrilotriacetic acid) of waste interlayer | |
| CN111205877B (en) | Composite repairing agent for treating farmland cadmium-polluted soil and repairing method | |
| CN108856282B (en) | Composite remediation method for heavy metal contaminated farmland soil | |
| CN103210714A (en) | Thin layer coating covering ecological restoration method for acidic coal gangue storage yard | |
| CN103130337A (en) | Method utilizing charcoal to achieve rural non-point source pollution denitrogenating | |
| CN111472366A (en) | Composite improved planting soil for repairing vegetation on mine side slope and preparation thereof | |
| CN105669331A (en) | Mining area land repair agent and repair method | |
| Bramryd | Effects of liquid and dewatered sewage sludge applied to a Scots pine stand (Pinus sylvestris L.) in central Sweden | |
| CN102757792A (en) | Compound ecological stand stabilizing agent prepared from sewage sludge as well as preparation method and application of compound ecological stand stabilizing agent | |
| CN111018619A (en) | Soil remediation modifier for red mud reservoir remediation, preparation method thereof and ecological remediation treatment method for red mud reservoir | |
| CN103964968B (en) | A kind of promote vegetation repair organic fertilizer produced from sludge generated and preparation method and application | |
| CN111974791B (en) | Ecological energy farm remediation method for multi-scene application of ionic rare earth mining area soil | |
| CN113929522A (en) | Mine restoration base material and method for restoring mine pollution by using same | |
| CN112893430A (en) | Method for soil remediation by using coal-based solid waste remediation material | |
| CN101597182B (en) | Application of ammonium sulfate mixed liquor in extracting heavy metals from waste composts with lawn plants | |
| CN110885689A (en) | Mining area soil composite improver and mining area soil improvement method | |
| Qian et al. | Effect of Bio char on plant growth and aluminium form of soil under aluminium stress | |
| CN110129063B (en) | Composite material suitable for safe utilization of heavy metal combined pollution farmland | |
| CN109479674B (en) | Composite improved matrix for repairing antimony ore area tailing sand | |
| CN116871317A (en) | Soil remediation method | |
| CN116694333A (en) | Solid waste-based biological soil restoration agent, application thereof and soil restoration method | |
| CN110606775A (en) | Method for preparing fertilizer by fermenting river sludge and waste garden biomass | |
| CN111662720A (en) | Organic soil conditioner and preparation method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200317 |