CN111592419A - Composite modifier for rare earth mining area soil remediation and preparation method thereof - Google Patents
Composite modifier for rare earth mining area soil remediation and preparation method thereof Download PDFInfo
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- 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
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
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- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
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- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
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- C05G3/80—Soil conditioners
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Abstract
The invention relates to the technical field of mineral soil remediation, in particular to a composite improver for soil remediation in a rare earth mining area and a preparation method thereof. The composite modifier comprises the following components: 10-30 parts of shell powder, 10-20 parts of crop waste, 20-30 parts of livestock and poultry manure, 20-30 parts of fermented sludge and 15-35 parts of bentonite by weight, and the plant adhesive is 100g/m in total volume3. The composite modifier provided by the invention canThe method effectively adjusts the contents of organic nitrogen, phosphorus, potassium and organic matters in the soil of the ionic rare earth mine area, improves the soil structure, improves the soil fertility, solves the problem of low contents of organic matters, nitrogen, phosphorus and other nutrient components in the waste soil of the ionic rare earth mine area, and provides a good environment for the growth of plants.
Description
Technical Field
The invention relates to the technical field of mineral soil remediation, in particular to a composite improver for soil remediation in a rare earth mining area and a preparation method thereof.
Background
The ionic rare earth ore species are widely distributed in Jiangxi, Fujian, Guangdong, Yunnan, Hunan, Guangxi, Zhejiang provinces and other provinces in the south of China, are rich in medium and heavy rare earth elements, wherein the reserves of the medium and heavy rare earth elements account for more than 80 percent of the world, and are valuable mineral resources. The ionic rare earth in China is mined in the 70 s, the resource development enters a very rapid development stage in the middle of the 80 s, a large number of rare earth mining areas produced by open pond leaching and heap leaching mining processes are built, and the in-situ leaching process is gradually improved in the middle of the 90 s.
Because the environmental protection measures of the early stage ore leaching process are relatively extensive, a large area of tailing storage yard is left in the heap leaching and pool leaching processes, the stacking and the downward discharge of the tailings change the original landform and the landform of mountainous areas and ditches, occupy the land, destroy the vegetation on the ground surface and form a larger range of tailing accumulation area. The earth surface of the tailing accumulation area is sandy, the structure is loose, the water permeability is strong, water and soil loss is easily caused, in addition, the ore leaching process adopts ammonium sulfate mostly, so that the tailing is acidic, and meanwhile, the contents of organic matters, nitrogen and phosphorus nutritional ingredients in the tailing are low, so that the vegetation is not favorably grown. Therefore, the problems of soil acidification and desertification of the rare earth ore waste land need to be solved urgently.
At present, the soil improvement method of the rare earth ore waste land mainly adopts a chemical method, namely, nutrients required by plants are supplemented by adding lime, chemical fertilizer and the like, the lime is easy to cause soil hardening, the follow-up topdressing management of common chemical fertilizer is lacked, sustainability is not achieved, and secondary pollution is easy to cause.
Disclosure of Invention
Aiming at the problems of acidification and desertification of the existing ionic rare earth mining area soil, the invention provides a composite modifier for repairing the rare earth mining area soil and a preparation method thereof. The invention fully utilizes the solid waste to carry out ecological restoration, not only restores the soil ecological environment of the ionic rare earth mine wasteland, improves the pH value of the soil, improves the soil structure and improves the soil fertility, so that the acidic sand soil becomes a carrier suitable for plant growth, but also realizes the resource utilization of the waste and has good economic benefit and ecological benefit.
In order to achieve the purpose, the invention adopts the following technical scheme:
a composite modifier for rare earth mining area soil remediation comprises the following components: the fertilizer comprises, by weight, 10-30 parts of shell powder, 10-20 parts of crop waste, 20-30 parts of livestock manure, 20-30 parts of fermented sludge and 15-35 parts of bentonite, wherein the total volume of the shell powder, the crop waste, the livestock manure, the fermented sludge and the bentonite is 100-one-phase 200g/m3。
Preferably, in the composite modifier, by weight, 15 parts of shell powder, 15 parts of crop waste, 25 parts of livestock and poultry manure, 25 parts of fermented sludge and 20 parts of bentonite are counted, and the total volume of the shell powder, the crop waste, the livestock and poultry manure, the fermented sludge and the bentonite is counted, and the plant adhesive is 150g/m3。
Preferably, in the composite modifying agent, the shell powder is oyster shell powder, and the granularity of the oyster shell powder is 50-100 microns. Shell powder mainly contains CaCO3The calcium carbonate is used as a substitute of commercial lime, zeolite and other calcareous materials, is used as a soil conditioner, is cheap and easy to obtain, and can realize resource utilization of wastes.
Preferably, in the composite modifier, the crop waste is a mixture of sawdust and rice hulls, and more preferably, the mass ratio of the sawdust to the rice hulls is 1: 1. The crop waste sawdust and rice hulls contain various nutrient elements and organic substances, can improve the physical properties of soil, and enhance the fertilizer and water retention performance of the soil, is a solid waste resource which can be recycled, and has important significance for protecting the ecological environment in rural areas and promoting the ecological development of agriculture.
Preferably, in the composite modifier, the livestock manure is a mixture of pig manure and chicken manure after high-temperature composting fermentation, and more preferably, the mass ratio of the chicken manure to the pig manure is 2: 1. The pig manure and the chicken manure after composting not only provide a large amount of nitrogen, phosphorus and potassium compounds for plants, but also synthesize a new high molecular organic matter, namely humus, so that the soil fertility is effectively improved, and the requirements of various nutrients in the growth process of crops are met.
Preferably, in the above-mentioned composite improver, the fermented sludge is obtained by fermenting and decomposing organic matters in sludge from a sewage plant by aerobic thermophilic bacteria or thermophilic bacteria. In the invention, the fermented sludge is dewatered sludge of an urban sewage treatment plant, and organic matters in the sludge are decomposed by using the functions of aerobic thermophilic bacteria and thermophilic bacteria by adopting an aerobic composting technology to form a substance similar to humus soil. The sludge meets the relevant regulation and control standard of sludge disposal and landscaping sludge for urban sewage treatment plants (GB/T23486-2009).
Preferably, in the composite modifier, the bentonite is Na as an interlayer cation+The bentonite has strong hygroscopicity and expansibility, can absorb water with volume being 8-15 times of that of the bentonite, and has volume expansion being several times to 30 times; can be dispersed into gel and suspension in water medium; the adsorption capacity for various gases, liquids and organic substances is certain, and the maximum adsorption capacity can reach 5 times of the self weight; its admixture with water, mud or fine sand has plasticity and cohesiveness.
Preferably, in the composite modifier, the plant adhesive is obtained by compounding sesbania gum, guar gum and locust gum, and more preferably, the sesbania gum, the guar gum and the locust gum are compounded according to the mass ratio of 5:3: 2. The plant adhesive is natural polysaccharide polymer extracted from plant seeds, and is a natural adhesive. Compared with the traditional adhesive, the adhesive is easy to degrade, can promote the formation of a soil granular structure, optimizes the living environment of soil microorganisms, and further promotes the curing of soil.
The invention also provides a preparation method of the composite modifier, which comprises the following steps:
1) adding crop wastes, livestock and poultry manure, fermented sludge and bentonite into a stirrer, and stirring for a certain time to obtain a mixture A;
2) adding the mixture A obtained in the step 1) into a stirrer, and adding shell powder while stirring to obtain a mixture B;
3) adding the plant adhesive according to the volume of the mixture B obtained in the step 2), and stirring for a certain time to obtain the plant adhesive.
Preferably, in the preparation method, the livestock manure is obtained by adjusting the water content of fresh chicken manure and pig manure to 60% and the C/N ratio to 19:1 and performing high-temperature composting fermentation in a manual pile turning mode, and compost products are in loose granular structures.
Preferably, in the preparation method, in the steps 1) to 3), the stirring is performed for 1-2 hours at a speed of 50-150 r/min.
The invention also provides an application of the composite modifier or the composite modifier prepared by the preparation method in ionic rare earth mining area soil remediation, preferably, the mass ratio of the composite modifier to the rare earth mining area soil is 1: 20-50, more preferably 1: 25.
the invention has the following beneficial effects:
(1) the invention selects shell powder, crop waste, livestock and poultry manure and fermented sludge as solid waste, is cheap and easy to obtain, has the effect of treating waste by waste, realizes resource utilization of waste, greatly controls the soil remediation cost, and has economic and environmental benefits;
(2) the composite modifier provided by the invention can effectively regulate the contents of organic nitrogen, phosphorus, potassium and organic matters in the soil of the ionic rare earth mine area, improve the soil structure, improve the soil fertility, solve the problem of low contents of organic matters, nitrogen, phosphorus and other nutritional ingredients in the waste soil of the ionic rare earth mine area, and provide a good environment for the growth of plants.
Drawings
Figure 1 is an SEM characterization of soil as such.
FIG. 2 is an SEM representation of soil after remediation by the complex conditioner of example 2.
FIG. 3 is an SEM representation of the soil after remediation by the complex conditioner of example 5.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the scope of the present invention is not limited thereto.
In the following examples:
the shell powder is oyster shell powder with particle size of 50-100 μm;
the crop waste is a mixture of sawdust and rice hulls in a mass ratio of 1: 1;
the livestock and poultry manure is obtained by mixing chicken manure and pig manure in a mass ratio of 2:1, adding sawdust, uniformly mixing, adjusting the C/N ratio to be 19:1, adding water, adjusting the water content to be 60%, adopting a manual turning mode, keeping the temperature to be above 55 ℃ for 10 days at a period of 30 days, and performing high-temperature composting fermentation;
the used fermented sludge is dewatered sludge of an urban sewage treatment plant, an aerobic composting technology is adopted, and organic matters in the sludge are decomposed by using the action of aerobic thermophilic bacteria and thermophilic bacteria to form a substance similar to humus soil; the water content of the product is 30%, and the particle size is 8 mm. The sludge meets the relevant regulation and control standard of sludge disposal and landscaping sludge for urban sewage treatment plants (GB/T23486-2009).
The bentonite is Na as interlaminar cation+The bentonite of (2);
the plant adhesives used in the embodiments 1-4 are prepared by compounding 3 natural plant adhesives of sesbania gum, guar gum and locust gum according to the mass ratio of 5:3: 2; the vegetable adhesive used in example 5 was sesbania gum; the vegetable adhesive used in example 6 was guar gum.
Example 1
Embodiment 1 provides a composite modifier for repairing acidic sandy soil in an ionic rare earth mining area, which comprises the following components: by weight, 10 parts of shell powder, 10 parts of crop waste, 20 parts of livestock and poultry manure,20 parts of fermented sludge and 15 parts of bentonite, and the plant adhesive is 100g/m in total volume of the shell powder, the crop waste, the livestock and poultry manure, the fermented sludge and the bentonite3。
The preparation method of the composite modifier comprises the following steps:
1) uniformly mixing 10 parts of crop waste, 20 parts of livestock and poultry manure, 20 parts of fermented sludge and 15 parts of bentonite at normal temperature;
2) putting the mixture obtained in the step 1) into a stirrer, adding 10 parts of shell powder, and uniformly stirring;
3) adding 100g/m calculated by the volume of the mixture obtained in the step 2)3The plant adhesive is added with water, the humidity is adjusted to be 70 percent, and the semi-fluid soil conditioner is obtained after stirring for 1.5 hours at 100 r/min.
Example 2
Embodiment 2 provides a composite modifier for repairing acidic sandy soil in an ionic rare earth mining area, which comprises the following components: the fertilizer is characterized in that the fertilizer comprises, by weight, 15 parts of shell powder, 15 parts of crop wastes, 25 parts of livestock and poultry manure, 25 parts of fermented sludge and 20 parts of bentonite, and the plant adhesive is 150g/m based on the total volume of the shell powder, the crop wastes, the livestock and poultry manure, the fermented sludge and the bentonite3。
The preparation method of the composite modifier comprises the following steps:
1) uniformly mixing 15 parts of crop wastes, 25 parts of livestock and poultry manure, 25 parts of fermented sludge and 20 parts of bentonite at normal temperature;
2) putting the mixture obtained in the step 1) into a stirrer, adding 15 parts of shell powder, and uniformly stirring;
3) adding 150g/m calculated by the volume of the mixture obtained in the step 2)3The plant adhesive is added with water, the humidity is adjusted to be 70 percent, and the semi-fluid soil conditioner is obtained after stirring for 1.5 hours at 100 r/min.
Example 3
Embodiment 3 provides a composite modifier for repairing acidic sandy soil in an ionic rare earth mining area, which comprises the following components: in parts by weight30 portions of shell powder, 20 portions of crop waste, 30 portions of livestock and poultry manure, 30 portions of fermented sludge and 35 portions of bentonite, and the plant adhesive is 200g/m in terms of the total volume of the shell powder, the crop waste, the livestock and poultry manure, the fermented sludge and the bentonite3。
The preparation method of the composite modifier comprises the following steps:
1) uniformly mixing 20 parts of crop wastes, 30 parts of livestock and poultry manure, 30 parts of fermented sludge and 35 parts of bentonite at normal temperature;
2) putting the mixture obtained in the step 1) into a stirrer, adding 30 parts of shell powder, and uniformly stirring;
3) adding 200g/m by volume of the mixture obtained in the step 2)3The plant adhesive is added with water, the humidity is adjusted to be 70 percent, and the semi-fluid soil conditioner is obtained after stirring for 1.5 hours at 100 r/min.
Example 4
Embodiment 4 provides a composite modifier for repairing acidic sandy soil in an ionic rare earth mining area, which comprises the following components: the fertilizer is characterized by comprising, by weight, 15 parts of shell powder, 15 parts of crop wastes, 30 parts of livestock and poultry manure, 30 parts of fermented sludge and 35 parts of bentonite, wherein the total volume of the shell powder, the crop wastes, the livestock and poultry manure, the fermented sludge and the bentonite is 100g/m of plant adhesive3。
The preparation method of the composite modifier comprises the following steps:
1) uniformly mixing 15 parts of crop wastes, 30 parts of livestock and poultry manure, 30 parts of fermented sludge and 35 parts of bentonite at normal temperature;
2) putting the mixture obtained in the step 1) into a stirrer, adding 15 parts of shell powder, and uniformly stirring;
3) adding 100g/m calculated by the volume of the mixture obtained in the step 2)3The plant adhesive is added with water, the humidity is adjusted to be 70 percent, and the semi-fluid soil conditioner is obtained after stirring for 1.5 hours at 100 r/min.
Example 5
Example 5 provides a method for treating an ionic rare earth mineThe composite modifier for restoring the acid desertification soil comprises the following components: the fertilizer is characterized in that the fertilizer comprises, by weight, 15 parts of shell powder, 15 parts of crop wastes, 25 parts of livestock and poultry manure, 25 parts of fermented sludge and 20 parts of bentonite, and the total volume of the shell powder, the crop wastes, the livestock and poultry manure, the fermented sludge and the bentonite is 150g/m of plant adhesive (sesbania gum)3。
The preparation method of the composite modifier comprises the following steps:
1) uniformly mixing 15 parts of crop wastes, 25 parts of livestock and poultry manure, 25 parts of fermented sludge and 20 parts of bentonite at normal temperature;
2) putting the mixture obtained in the step 1) into a stirrer, adding 15 parts of shell powder, and uniformly stirring;
3) adding 150g/m calculated by the volume of the mixture obtained in the step 2)3The plant adhesive (sesbania gum) is added with water, the humidity is adjusted to be 70 percent, and the mixture is stirred for 1.5 hours at 100r/min, so that the semi-fluid soil conditioner is obtained.
Example 6
Embodiment 6 provides a composite modifier for repairing acidic sandy soil in an ionic rare earth mining area, which comprises the following components: the fertilizer is characterized in that the fertilizer comprises, by weight, 15 parts of shell powder, 15 parts of crop wastes, 25 parts of livestock and poultry manure, 25 parts of fermented sludge and 20 parts of bentonite, and the total volume of the shell powder, the crop wastes, the livestock and poultry manure, the fermented sludge and the bentonite is 150g/m of plant adhesive (guar gum)3。
The preparation method of the composite modifier comprises the following steps:
1) uniformly mixing 15 parts of crop wastes, 25 parts of livestock and poultry manure, 25 parts of fermented sludge and 20 parts of bentonite at normal temperature;
2) putting the mixture obtained in the step 1) into a stirrer, adding 15 parts of shell powder, and uniformly stirring;
3) adding 150g/m calculated by the volume of the mixture obtained in the step 2)3The plant adhesive (guar gum) is added with water, the humidity is adjusted to 70 percent, and the mixture is stirred for 1.5 hours at 100r/min to obtain the semi-fluid soil conditioner.
Test examples soil remediation test
A rare earth abandoned mine in Jiangxi Ganzhou is put into use in 2001, and the ionic rare earth mine is exploited by adopting a heap leaching process and abandoned for more than 10 years. Because the heap leaching process is relatively extensive in mining, a large amount of bare waste land and tailing sand are deposited on the land, so that the mountain is seriously peeled, the surface vegetation is completely destroyed, and the ecological recovery is difficult. The field survey shows that the rare earth abandoned land has the ecological problems of bare earth surface, serious water and soil loss, serious soil desertification, extremely low soil nutrient and the like. The basic properties of the soil are shown in table 1.
TABLE 1 physicochemical Properties of the soil
6 experimental areas are arranged in the rare earth waste site dump leaching site, and the composite modifying agent of the embodiment 1-6 is respectively adopted to modify the soil of the 6 experimental areas.
The soil improvement comprises the following concrete steps:
(1) removing pumice in the waste rare earth ore field, leveling the field, wherein after the field is leveled, the horizontal elevation of each experimental block is 325m, the length is 3m, the width is 2m, the depth is 0.2m, and the ground gradient is 1-5 degrees;
(2) the composite modifying agent is uniformly scattered on the surface of a rare earth ore heap leaching field, is uniformly mixed with the acidic sandy soil, and is placed for 7 days, wherein the mass ratio of the composite modifying agent to the acidic sandy soil is 1: 25.
the following tests were carried out on the soil after the remediation with the composite improver of examples 1 to 6:
(1) pH detection
The pH of the soil after the composite modifier is repaired in different embodiments is shown in the table 2.
TABLE 2 soil pH test
As can be seen from Table 2, the pH values of the soil repaired by the composite improver of examples 1-4 are increased compared with the original soil, which shows that the composite improver of the invention can effectively improve the soil acidification problem. Wherein, the pH of the soil in the embodiment 2 reaches 6.6, and the soil is beneficial to the growth of plants in the pH range and has the optimal effect.
(2) Organic matter and nutrients
The contents of organic matters, total nitrogen, available phosphorus and available potassium in the soil after the composite modifier is repaired in different embodiments are shown in table 3. Wherein, the organic matter is determined by the soil organic matter determination method of GB 9834-1988; an automatic azotometer method for measuring total nitrogen of NY/T1121.24-2012 soil by total nitrogen sampling; the available phosphorus adopts NY/T1121.7-2014; the content of the quick-acting potassium is determined by NY/T889-2004 soil quick-acting potassium.
TABLE 3 soil organic matter and nutrient detection
As can be seen from table 3, the contents of organic matters, nitrogen, available phosphorus and available potassium in the soil repaired by the composite conditioner of examples 1 to 4 are all significantly increased compared with the original soil form, which indicates that the composite conditioner of the present invention can significantly increase the contents of organic matters and nutrients in the soil, increase the soil fertility, improve the physical properties thereof, and provide a favorable environment for plant growth.
(3) SEM characterization
SEM characterization was performed on the soil as such and the soil after the composite modifier remediation of examples 2 and 5, as shown in FIG. 1, FIG. 2 and FIG. 3. As can be seen from FIG. 1, the original soil consists of particles with different sizes, and the particles are sparse; as can be seen from fig. 2, the fine particles in the soil repaired by the composite modifier in example 2 are attached to the surface of the large particles, the soil body is dense, the stability is high, and the granular structure of the soil is improved. Example 5 sesbania gum was used as a plant binder, and as can be seen from fig. 3, part of the fine particles in the soil after remediation were attached to the surface of the large particles, but the bonding was insufficient and the soil was loose. In example 6, guar gum was used as a vegetable binder, and the soil after mixing was too viscous, resulting in soil hardening.
In conclusion, the composite modifier prepared by mixing the shell powder, the crop wastes, the animal wastes, the fermented sludge, the bentonite and the plant adhesive according to different proportions can improve the soil structure of the waste land of the ionic rare earth mining area and improve the soil fertility, thereby creating a soil environment suitable for plants to grow. Meanwhile, the composite modifying agent utilizes solid waste, realizes resource utilization, avoids secondary pollution to the environment, reduces the cost of ecological restoration engineering, creates great environmental benefit, social benefit and economic benefit, and promotes the development of circular economy.
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The composite improver for rare earth mining area soil remediation is characterized by comprising the following components: 10-30 parts of shell powder, 10-20 parts of crop waste, 20-30 parts of livestock and poultry manure, 20-30 parts of fermented sludge and 15-35 parts of bentonite by weight, and the plant adhesive is 100-200g/m in total volume of the shell powder, the crop waste, the livestock and poultry manure, the fermented sludge and the bentonite3。
2. The compound improver according to claim 1, wherein 15 parts by weight of shell powder, 15 parts by weight of crop wastes, 25 parts by weight of livestock and poultry excrements, 25 parts by weight of fermented sludge and 20 parts by weight of bentonite are contained, and the vegetable binder is 150g/m in total volume of the shell powder, the crop wastes, the livestock and poultry excrements, the fermented sludge and the bentonite3。
3. The compound improver according to claim 1 or 2, wherein the shell powder is oyster shell powder, and the particle size of the shell powder is 50-100 microns.
4. Composite improver according to any one of claims 1 to 3, wherein the crop waste is a mixture of sawdust and rice hulls, preferably in a mass ratio of 1: 1.
5. A compound improver according to any one of claims 1 to 4, wherein the livestock manure is a mixture of chicken manure and pig manure after high-temperature composting fermentation, and preferably the mass ratio of the chicken manure to the pig manure is 2: 1.
6. The agent for improving sludge quality according to any one of claims 1 to 5, wherein the fermented sludge is obtained by decomposing organic substances in sludge by aerobic thermophilic bacteria or thermophilic bacteria fermentation of sludge from sewage plants.
7. The composite improver according to any one of claims 1 to 6, wherein the plant adhesive is compounded from sesbania gum, guar gum and locust gum, preferably the sesbania gum, the guar gum and the locust gum are compounded according to a mass ratio of 5:3: 2.
8. The method for preparing a composite modifier according to any one of claims 1 to 7, characterized by comprising the steps of:
1) adding crop wastes, livestock and poultry manure, fermented sludge and bentonite into a stirrer, and stirring for a certain time to obtain a mixture A;
2) adding the mixture A obtained in the step 1) into a stirrer, and adding shell powder while stirring to obtain a mixture B;
3) adding a plant adhesive according to the volume of the mixture B obtained in the step 2), and stirring for a certain time to obtain the plant adhesive;
preferably, the livestock manure is obtained by adjusting the water content of fresh chicken manure and pig manure to 60% and the C/N ratio to 19:1 and performing high-temperature composting fermentation in an artificial turning mode.
9. The preparation method according to claim 8, wherein the stirring is performed at 50-150 r/min for 1-2 h in the steps 1) -3).
10. Use of the composite improver of any one of claims 1 to 7 or the composite improver prepared by the preparation method of claim 8 or 9 in ionic type rare earth mining area soil remediation, wherein the mass ratio of the composite improver to the rare earth mining area soil is preferably 1: 20-50.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113042523A (en) * | 2021-04-01 | 2021-06-29 | 江西省农业科学院土壤肥料与资源环境研究所 | Method for repairing soil pollution of rare earth mine |
| CN113305145A (en) * | 2021-07-06 | 2021-08-27 | 矿冶科技集团有限公司 | Reclamation soil reconstruction method for heap-leaching field and application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103947326A (en) * | 2014-05-12 | 2014-07-30 | 中山大学 | Method for ionic rare earth mine tailing land improvement and vegetation reclamation |
| CN105061001A (en) * | 2015-04-17 | 2015-11-18 | 北京林业大学 | Acidic copper tailing matrix improver, improving matrix, preparation method of improver and application of improving matrix |
| CN107141177A (en) * | 2017-06-14 | 2017-09-08 | 合肥助航生态农业科技有限公司 | Modifying agent increase soil fertility and preparation method thereof |
| CN108059518A (en) * | 2017-12-05 | 2018-05-22 | 上海永通生态工程股份有限公司 | A kind of suspension type liquid fertilizer and preparation method thereof |
| CN110172004A (en) * | 2019-06-12 | 2019-08-27 | 赣州哈克生物科技有限公司 | A kind of ion type rareearth tailing soil conditioner and preparation method thereof |
-
2020
- 2020-04-28 CN CN202010352170.1A patent/CN111592419A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103947326A (en) * | 2014-05-12 | 2014-07-30 | 中山大学 | Method for ionic rare earth mine tailing land improvement and vegetation reclamation |
| CN105061001A (en) * | 2015-04-17 | 2015-11-18 | 北京林业大学 | Acidic copper tailing matrix improver, improving matrix, preparation method of improver and application of improving matrix |
| CN107141177A (en) * | 2017-06-14 | 2017-09-08 | 合肥助航生态农业科技有限公司 | Modifying agent increase soil fertility and preparation method thereof |
| CN108059518A (en) * | 2017-12-05 | 2018-05-22 | 上海永通生态工程股份有限公司 | A kind of suspension type liquid fertilizer and preparation method thereof |
| CN110172004A (en) * | 2019-06-12 | 2019-08-27 | 赣州哈克生物科技有限公司 | A kind of ion type rareearth tailing soil conditioner and preparation method thereof |
Non-Patent Citations (5)
| Title |
|---|
| OWEN R.FENNEMA: "《食品化学》", 30 April 2003, 中国轻工业出版社 * |
| 中国环境科学学会: "《中国环境科学学会学术年会论文集2012第四卷》", 30 June 2012, 中国农业大学出版社 * |
| 杜永林: "《无公害水稻标准化生产》", 31 January 2006, 中国农业出版社 * |
| 王显伦等: "《面食品改良剂及应用技术》", 30 September 2006, 中国轻工业出版社 * |
| 蒋建新等: "《功能性多糖胶开发与利用》", 31 January 2013, 中国轻工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042523A (en) * | 2021-04-01 | 2021-06-29 | 江西省农业科学院土壤肥料与资源环境研究所 | Method for repairing soil pollution of rare earth mine |
| CN113305145A (en) * | 2021-07-06 | 2021-08-27 | 矿冶科技集团有限公司 | Reclamation soil reconstruction method for heap-leaching field and application |
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Application publication date: 20200828 |