CN110055079A - A kind of soil-repairing agent and its preparation method and application - Google Patents
A kind of soil-repairing agent and its preparation method and application Download PDFInfo
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- CN110055079A CN110055079A CN201910323964.2A CN201910323964A CN110055079A CN 110055079 A CN110055079 A CN 110055079A CN 201910323964 A CN201910323964 A CN 201910323964A CN 110055079 A CN110055079 A CN 110055079A
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- soil
- charcoal
- repairing agent
- humic acid
- repairing
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N61/00—Biocides, pest repellants or attractants, or plant growth regulators containing substances of unknown or undetermined composition, e.g. substances characterised only by the mode of action
-
- 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
-
- 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
-
- 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
- C09K2101/00—Agricultural use
-
- 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
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Wood Science & Technology (AREA)
- Agronomy & Crop Science (AREA)
- Inorganic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Soil Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a kind of soil-repairing agents, are mixed to prepare by charcoal and humic acid, and charcoal is made by agricultural waste material, and the mass ratio of the charcoal and humic acid is 1~2:1~3.The preparation method of soil-repairing agent is also disclosed, first by agricultural waste material drying and the obtained charcoal of heating, then by charcoal and humic acid mixing, soil-repairing agent is obtained after crushing, preparation process is simple, turns waste into wealth.The application of soil-repairing agent is also disclosed, can effectively reduce the content of heavy metal in soil Cd, improve soil moisture content and promotes plant growth.
Description
Technical field
The invention belongs to heavy metal pollution of soil recovery technique fields, and in particular to a kind of soil-repairing agent and its preparation side
Method and application.
Background technique
As the active process such as urbanization, industrialization are accelerated, it is sustainable that heavy metal pollution of soil has become restriction agricultural
One of critical issue of development, the unordered discharge of Industrial " three Waste " and the fertilizer containing Cd are largely using causing farmland soil heavy metals dirty
Dye problem receives significant attention.Investigation display, national farmland Cd point exceeding standard rate are 7%, and pollution cultivated area reaches 1.4 ten thousand mu
hm2, inorganic pollution first place is occupy, every year because the exceeded agricultural product of cadmium pollution reach 1,460,000 t.And Cd is with toxicity and by force
Migration, the cadmium in soil is easily absorbed by plants and enters organism by food chain, and then pacifies to the health and lives of the mankind
Serious harm is constituted entirely.Therefore how repairing heavy metal in soil Cd pollutes, and improves the bad border quality of soil and has become current agricultural
The duration hot spot of ecology and environmental science research.
Summary of the invention
One of the objects of the present invention is to provide a kind of soil-repairing agents, by charcoal with the compound improvement Polluted Soil of humic acid
Earth changes heavy metal-polluted soil occurrence patterns, reduces the content of heavy metal in soil Cd.
The second object of the present invention is to provide a kind of preparation method of soil-repairing agent, be prepared using agricultural waste material
Charcoal, then will say that charcoal is mixed with humic acid, soil-repairing agent is obtained, preparation process is simple.
The third object of the present invention be to provide soil-repairing agent in repairing polluted soil in terms of heavy metal, promote plant
Application in terms of growth aspect and raising soil moisture content.
The present invention is to be achieved through the following technical solutions:
A kind of soil-repairing agent, is mixed to prepare by charcoal and humic acid, and charcoal is made by agricultural waste material, described
The mass ratio of charcoal and humic acid is 1~2:1~3.Further, the pH value of charcoal is 11.50, the mass fraction of ash content
It is 35.98%, hydrogen-carbon ratio 0.05, carbon ratio 1.24, specific surface area 54.33m2/ g, quiet and deserted volume are 0.28cm2/ g, hole
Diameter size is 109.44nm.
Further, the pH value of humic acid is 10.13, is 30.69% containing carbon mass fraction, and hydrogeneous mass fraction is
2.82%, it is 1.57% containing nitrogen content, oxygen-containing mass fraction is 33.91%, hydrogen-carbon ratio 0.165, carbon ratio 0.46.
Further, agricultural waste material is rape waste.
The invention also discloses the preparation methods of the soil-repairing agent, comprising the following steps:
(1) it prepares charcoal: agricultural waste material is air-dried into drying, the waste after drying is pulverized and sieved, 450~
3.3~4.5h is heated at 550 DEG C, is subsequently placed in 3~4h at room temperature, cooling, charcoal needed for being made；
(2) charcoal prepared and humic acid are mixed according to the ratio, and crushes and obtains mixing powder, it is as native
Earth renovation agent.
Further, drying temperature described in step (1) is 75~85 DEG C, and drying time is 3~4h.
Further, the increase rate of heating temperature is 15~20 DEG C/min in step (1).
The invention also discloses application of the soil-repairing agent in repairing polluted soil in terms of heavy metal.
The invention also discloses application of the soil-repairing agent in terms of promoting plant growth.
The invention also discloses application of the soil-repairing agent in terms of improving soil moisture content.
Compared with prior art, the invention has the following beneficial technical effects:
Soil-repairing agent disclosed by the invention, raw material components are charcoal and humic acid, and charcoal is being lacked by biomass
Soil pH can be improved not only to drop as passivation restoring material by the solid product that thermochemical study generates in oxygen environment
The biological effectiveness of low heavy metal-polluted soil can also adsorb heavy metal-polluted soil by surface functional group；Humic acid is natural colloid
Organic substance, it is from a wealth of sources, and there is functional group abundant, and heavy metal-polluted soil can be reduced by improving soil fertility
Migration；After the soil-repairing agent is applied to heavy-metal contaminated soil, the heavy metal in soil is effectively passivated
And fixation, while polluted soil is effectively repaired, thus on the one hand the heavy metal activity in soil is significantly reduced,
Absorption of the crops to heavy metal is advantageously reduced, so that content of beary metal significantly reduces in crops, is on the other hand changed
Kind soil fertility；Soil-repairing agent of the present invention has preferable stability and environment friendly, will not generate secondary dirt
Dye, it is low in cost, it is easy to be widely applied.
Further, agricultural waste material is a kind of natural organic matter, charcoal can be prepared as, for improveing soil
Fertility, while being turned waste into wealth.
The preparation method of soil-repairing agent disclosed by the invention uses agricultural waste material to prepare charcoal first, then will
Charcoal is mixed with humic acid, obtains soil-repairing agent, and preparation process is simple.
The application that the invention discloses soil-repairing agents in repairing polluted soil in terms of heavy metal, can effectively reduce soil
The content of middle heavy metal Cd.
The invention also discloses application of the soil-repairing agent in terms of promoting plant growth, as described in Figure 4, biology
The application of charcoal and humic acid plays certain facilitation to the growth of rape, especially application humic acid after root dry weight about
Increase by 87.59%.
The invention discloses application of the soil-repairing agent in terms of improving soil moisture content, and soil moisture content is with charcoal
With humic acid proportion increase and increase.
Detailed description of the invention
Fig. 1 is the SEM aspect graph of rape waste charcoal；
Fig. 2 is the SEM aspect graph of humic acid；
Fig. 3 is the infrared spectrogram of rape waste charcoal and humic acid renovation agent；
Fig. 4 is the heavy metal-polluted soil renovation agent of different proportion to the yield of rape mutation analysis figure after repairing polluted soil；
Fig. 5 is different groups of tests to the rape cadmium concentration mutation analysis figure after repairing polluted soil；
Fig. 6 is the heavy metal-polluted soil renovation agent of different proportion to cadmium concentration mutation analysis figure in repairing polluted soil.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
Soil-repairing agent of the invention, raw material include charcoal and humic acid, the quality of the charcoal and humic acid
Than for 1~2:1~3.
More preferably, charcoal is agricultural waste material, and agricultural waste material is rape waste, soybean waste and corn
One of waste or a variety of mixtures.
Embodiment 1
(1) the rape waste material by rape waste natural air drying, in 80 DEG C of dry 3.5h, after being dried；It will
Rape waste crushing material sieving after drying, keeps its feed particles uniform, it is uniformly put into biomass pyrolytic reaction dress
In setting, 500 DEG C are heated to, heating increase rate is 15 DEG C/min, keeps the temperature 4h, is cooled to room temperature 3h taking-up, it is discarded to obtain rape
Object charcoal；
(2) it takes 1 part of brassinosteroid biosynthesis charcoal to mix with 1 part of humic acid, the two is uniformly mixed, crush and obtain charcoal soil
Renovation agent.
Embodiment 2
(1) the rape waste material by rape waste natural air drying, in 75 DEG C of dry 3h, after being dried；It will do
Rape waste crushing material sieving after dry, keeps its feed particles uniform, it is uniformly put into biomass pyrolytic reaction unit
In, 450 DEG C are heated to, heating increase rate is 20 DEG C/min, keeps the temperature 3h, is cooled to room temperature 3h taking-up, obtains rape waste
Charcoal；
(2) it takes 2 parts of brassinosteroid biosynthesis charcoals to mix with 1 part of humic acid, the two is uniformly mixed, crush and obtain charcoal soil
Renovation agent.
Embodiment 3
(1) the rape waste material by rape waste natural air drying, in 85 DEG C of dry 4h, after being dried；It will do
Rape waste crushing material sieving after dry, keeps its feed particles uniform, it is uniformly put into biomass pyrolytic reaction unit
In, 550 DEG C are heated to, heating increase rate is 20 DEG C/min, keeps the temperature 4h, is cooled to room temperature 4h taking-up, obtains rape waste
Charcoal；
(2) it takes 1 part of brassinosteroid biosynthesis charcoal to mix with 2 parts of humic acid, the two is uniformly mixed, crush and obtain soil remediation
Agent.
Embodiment 4
(1) the rape waste material by rape waste natural air drying, in 80 DEG C of dry 3h, after being dried；It will do
Rape waste crushing material sieving after dry, keeps its feed particles uniform, it is uniformly put into biomass pyrolytic reaction unit
In, 450 DEG C are heated to, heating increase rate is 15 DEG C/min, keeps the temperature 3h, is cooled to room temperature 3h taking-up, obtains rape waste
Charcoal；
(2) it takes 1 part of brassinosteroid biosynthesis charcoal to mix with 3 parts of humic acid, the two is uniformly mixed, crush and obtain soil remediation
Agent.
As shown in Figure 1, the charcoal surface texture that Examples 1 to 4 obtains is loose, more active sites, hole are exposed
Diameter size is about 109.44nm, based on micropore.
The charcoal that Examples 1 to 4 is obtained carries out elemental analysis and infrared spectrum analysis, the results are shown in Table 1, table 2 and figure
3。
The elemental analysis of 1 charcoal of table
The infrared spectrum analysis of 2 charcoal of table
* indicates identifiable peak in table 2, and biological carbon surface has a functional group abundant, and containing aromatic substance,
NH4 +(1396.4cm-1)、—C-H(696cm-1), this adsorbs Cd for charcoal and provides the foundation, and in alkalinity, soil is adjusted
PH value.
Humic acid of the present invention makes the science and technology prosperous Co., Ltd purchased from Shanxi Province's perseverance, carries out infrared spectrum analysis to it,
It the results are shown in Table 3 and Fig. 3.
The infrared spectrum analysis of 3 humic acid of table
* indicates identifiable peak in table 3, and humic acid surfaces contain a large amount of functional group, and contain 900~670cm-1It
Between aromatizations and the heterocyclic compound such as pyridine, indoles, the adsorbate stability with higher formed with heavy metal.
This research uses potting soil simulating pollution experimental method.In the unpolluted original of Xi'an Weiyang District agricultural land soil
Beginning soil, the loess parent material of soil types Wei Lou great soil group.It air-dries, be sieved after fresh soil collection, added into the soil of 1kg
1%~3% renovation agent, adjusting and keeping soil moisture content is the 70% of field capacity, is air-dried after aging 60d, ground
2mm sieve, is used as cadmium pollution soil fuel feeding dish pot experiment.
With rape pot experiment come the effect of verifying soil-repairing agent prepared by the present invention, every basin dress pollutes dry ground 1kg, if
8 processing, are respectively as follows: the control group (CK) for not adding any material；Only addition heavy metal Cd processing (T0)；Add heavy metal Cd
(T1) is handled with charcoal；Add heavy metal Cd and humic acid processing (T2)；The soil for adding heavy metal Cd and being prepared with embodiment 1
Earth renovation agent handles (T3)；It adds heavy metal Cd and (T4) is handled with soil-repairing agent prepared by embodiment 2；Add heavy metal Cd
(T5) is handled with the soil-repairing agent prepared with embodiment 3；Add heavy metal Cd and with embodiment 4 prepare soil-repairing agent at
It manages (T6).
Each processing sets 5 repetitions.Entire incubation carries out in artificial greenhouse, and the diurnal temperature in greenhouse is controlled 26
DEG C/20 DEG C, the time is 16h/8h, relative humidity 60% round the clock.After soil, additives matter are mixed well, soil is adjusted
Earth water content is the 70% of field capacity, and every basin sows 6-8 rape seed after balance, is periodically mended during growth of rape
Water harvests after growth of rape 1 month.Rapeseed plants are divided into part above and below the ground, is disappeared after dries pulverizing with nitric acid and is boiled, with original
The Cd content at sub- absorption spectrophotometer measurement each position of rape, as shown in figure 5, in addition taking a part of pot experiment soil, air-dry,
It mixes to be disappeared after being sieved with nitric acid and hydrofluoric acid and boil, measure soil available Cd content, such as Fig. 6 with atomic absorption spectrophotometer
It is shown.
Influence of 4 different disposal of table to the nutrient of polluted soil
As shown in table 4, charcoal can reach absorption heavy metal by influencing the content of pH, CEC and P elements in soil
The purpose of Cd is in increasing trend, soil moisture content is with charcoal and humic acid with the increase that charcoal and humic acid match
The increase of proportion and increase, the CEC of other different ratio charcoals and humic acid is reduced in various degree, different ratio charcoal
It can influence the physicochemical property of soil to some extent with humic acid.
As shown in Figure 4, it can be seen that in a certain concentration range, the growth of rape is played in the application of charcoal and humic acid
Root dry weight increases about 87.59% after certain facilitation, especially application humic acid.
As shown in figure 5, being added after charcoal and humic acid, cadmium content is substantially reduced in plant, with the increasing for applying ratio
Add, cadmium content successively successively decreases 30% in plant, this illustrates that the content of cadmium in plant can be effectively reduced in charcoal and humic acid.
It can as shown in fig. 6, singly applying the Passivation Treatments such as charcoal and the humic acid of charcoal and humic acid and different ratio
To be effectively reduced the validity of Cd in cadmium pollution vegetable field soil, and compound passivator is significantly better than single passivator.
Claims (10)
1. a kind of soil-repairing agent, which is characterized in that be mixed to prepare by charcoal and humic acid, charcoal is by agricultural waste material
It is made, the mass ratio of the charcoal and humic acid is 1~2:1~3.
2. soil-repairing agent according to claim 1, which is characterized in that the pH value of charcoal is 11.50, the matter of ash content
Measuring score is 35.98%, hydrogen-carbon ratio 0.05, carbon ratio 1.24, specific surface area 54.33m2/ g, quiet and deserted volume are
0.28cm2/ g, pore size 109.44nm.
3. soil-repairing agent according to claim 1, which is characterized in that the pH value of humic acid is 10.13, carbon containing quality
Score is 30.69%, and it is 1.57% containing nitrogen content that hydrogeneous mass fraction, which is 2.82%, and oxygen-containing mass fraction is
33.91%, hydrogen-carbon ratio 0.165, carbon ratio 0.46.
4. soil-repairing agent according to claim 1, which is characterized in that agricultural waste material is rape waste.
5. the preparation method of soil-repairing agent described in Claims 1 to 4 any one, which comprises the following steps:
(1) it prepares charcoal: agricultural waste material is air-dried into drying, the waste after drying is pulverized and sieved, 450~550
3.3~4.5h is heated at DEG C, is subsequently placed in 3~4h at room temperature, cooling, charcoal needed for being made；
(2) charcoal prepared and humic acid are mixed according to the ratio, and crushes and obtains mixing powder, as soil is repaired
Multiple agent.
6. the preparation method of soil-repairing agent according to claim 5, which is characterized in that drying described in step (1)
Temperature is 75~85 DEG C, and drying time is 3~4h.
7. the preparation method of soil-repairing agent according to claim 5, which is characterized in that heating temperature in step (1)
Increase rate is 15~20 DEG C/min.
8. application of the soil-repairing agent described in Claims 1 to 4 any one in repairing polluted soil in terms of heavy metal Cd.
9. application of the soil-repairing agent described in Claims 1 to 4 any one in terms of promoting plant growth.
10. application of the soil-repairing agent described in Claims 1 to 4 any one in terms of improving soil moisture content.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655186A (en) * | 2019-11-19 | 2020-01-07 | 云南大学 | Biochar-based filter bed device and method for treating acidic heavy metal wastewater |
| CN111250050A (en) * | 2020-01-19 | 2020-06-09 | 招商局生态环保科技有限公司 | Preparation method of modified biochar and modified biochar |
| CN111330541A (en) * | 2020-03-12 | 2020-06-26 | 陕西科技大学 | Modified biochar and preparation method thereof |
| CN112403437A (en) * | 2020-10-30 | 2021-02-26 | 太原师范学院 | Iron tailing heavy metal adsorbent and application thereof |
| CN112592240A (en) * | 2020-11-26 | 2021-04-02 | 标优美生态工程盐城有限公司 | Bio-carbon-based composite conditioner for repairing soil cadmium pollution and preparation method thereof |
| CN113278422A (en) * | 2021-05-28 | 2021-08-20 | 陕西科技大学 | Modified biochar material for preventing and controlling soil pesticide residues and preparation and use methods thereof |
| CN113714269A (en) * | 2020-05-24 | 2021-11-30 | 中国环境科学研究院 | Technical method for optimizing and regulating soil nutrients |
| CN113861994A (en) * | 2021-09-30 | 2021-12-31 | 广西壮族自治区农业科学院 | Biochar soil restoration agent and preparation method thereof |
| CN114804972A (en) * | 2021-01-27 | 2022-07-29 | 中国环境科学研究院 | Method for regulating and controlling heavy metal activity by using biochar in cooperation with soil humus |
| CN115322053A (en) * | 2022-08-23 | 2022-11-11 | 祖宗田(成都)科技有限公司 | Preparation method and application of saline-alkali soil remediation agent |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655186A (en) * | 2019-11-19 | 2020-01-07 | 云南大学 | Biochar-based filter bed device and method for treating acidic heavy metal wastewater |
| CN111250050A (en) * | 2020-01-19 | 2020-06-09 | 招商局生态环保科技有限公司 | Preparation method of modified biochar and modified biochar |
| CN111330541A (en) * | 2020-03-12 | 2020-06-26 | 陕西科技大学 | Modified biochar and preparation method thereof |
| CN113714269A (en) * | 2020-05-24 | 2021-11-30 | 中国环境科学研究院 | Technical method for optimizing and regulating soil nutrients |
| CN112403437A (en) * | 2020-10-30 | 2021-02-26 | 太原师范学院 | Iron tailing heavy metal adsorbent and application thereof |
| CN112592240A (en) * | 2020-11-26 | 2021-04-02 | 标优美生态工程盐城有限公司 | Bio-carbon-based composite conditioner for repairing soil cadmium pollution and preparation method thereof |
| CN114804972A (en) * | 2021-01-27 | 2022-07-29 | 中国环境科学研究院 | Method for regulating and controlling heavy metal activity by using biochar in cooperation with soil humus |
| CN114804972B (en) * | 2021-01-27 | 2023-08-01 | 中国环境科学研究院 | Method for regulating heavy metal activity by cooperation of biochar and soil humus |
| CN113278422A (en) * | 2021-05-28 | 2021-08-20 | 陕西科技大学 | Modified biochar material for preventing and controlling soil pesticide residues and preparation and use methods thereof |
| CN113861994A (en) * | 2021-09-30 | 2021-12-31 | 广西壮族自治区农业科学院 | Biochar soil restoration agent and preparation method thereof |
| CN115322053A (en) * | 2022-08-23 | 2022-11-11 | 祖宗田(成都)科技有限公司 | Preparation method and application of saline-alkali soil remediation agent |
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