CN108929696A - A kind of soil-repairing agent and preparation method thereof - Google Patents
A kind of soil-repairing agent and preparation method thereof Download PDFInfo
- Publication number
- CN108929696A CN108929696A CN201810645105.0A CN201810645105A CN108929696A CN 108929696 A CN108929696 A CN 108929696A CN 201810645105 A CN201810645105 A CN 201810645105A CN 108929696 A CN108929696 A CN 108929696A
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- Prior art keywords
- soil
- repairing agent
- biomass carbon
- cyclodextrin
- diatomite
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Classifications
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- 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
-
- 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
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- 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
Abstract
The present invention provides a kind of soil-repairing agent and preparation method thereof, which consists of the following compositions by weight: biomass carbon 30-50%, calcium hydroxy phosphate 10-20%, humic acid potassium 10-20%, alpha-cyclodextrin 10-20%, diatomite 5-10%, plant ash 5-10%；Said components give full play to synergistic effect, by chelating, precipitating, absorption, improvement, adjust the effects of pH value, so that the available heavy metal content in soil substantially reduces, soil-repairing agent, which is prepared, has good effect when repairing cadmium lead arsenic combined contamination soil, and reparation medicament of the invention has the advantages that preparation method is simple, feasible, regulation effect is good.
Description
The application is application No. is 201610079842X, and the applying date is on February 04th, 2016, and invention and created name is
The divisional application of the patent of " a kind of combined contamination soil renovation agent and application ".
Technical field
The present invention relates to soil pollution recovery technique fields, and in particular to a kind of combined contamination soil renovation agent and application.
Background technique
Heavy metal pollution of soil is gradually at the focal issue of public concern.
According to announcement " the national Soil Pollution Investigation bulletin " display in 2014 of Environmental Protection Department and Ministry of Land and Resources: the whole nation
Soil environment situation totally allows of no optimist, and some areas soil pollution is heavier, and arable soil environmental quality causes anxiety, and industry and mining are discarded
Ground soil environment outstanding problem.The human activities such as industry and mining, agricultural and Environmental Background Values of Soils height be cause soil pollution or
The main reason for exceeded.The total exceeding standard rate of national soil is 16.1%, wherein slightly, slightly, moderate and serious pollution point ratio
Example is respectively 11.2%, 2.3%, 1.5% and 1.1%.Based on inorganic type, organic type takes second place pollution type, compound pollution
Specific gravity is smaller, and exceeded digit of inorganic pollution accounts for the 82.8% of all exceeded points.
In terms of pollution distribution situation, soils in south china pollution overweights the north；Yangtze River Delta, the Delta of the Pearl River, the old work in northeast
The partial regions such as industry base soil contamination problem is more prominent, and southwest, variable charge soil heavy metals exceeding standard range are larger；Cadmium,
The situation gradually risen from northwest to the southeast, from northeast to southwestward is presented in 4 kinds of mercury, arsenic, lead level of inorganic contaminants distributions.
Major pollutants are cadmium, nickel, copper, arsenic, mercury, lead, DDT and polycyclic aromatic hydrocarbon.If with second national land investigation
As a result subject to, China arable land latest data is 2,030,770,000 mu to calculate, and the cultivated area of middle serious pollution accounts for 2.9%,
Reach 58,890,000 mu.
Mainly there is immobilization/stabilisation for the administering method of heavy metal pollution of soil at present, elution method, wash local method, electricity
Dynamics repairing method, chemical reduction method, phytoremediation, microorganism remediation.But overall that there are remediation efficiencies is low, processing cost is high etc.
Problem.
Therefore, it is necessary to learn from other's strong points to offset one's weaknesses from existing various methods, a kind of soil remediation medicament is invented.
Summary of the invention
Technical problem to be solved by the invention is to provide it is a kind of prepare be simple and convenient to operate, the combined pollution that effect is good
Soil-repairing agent and application.
In order to solve the above technical problems, the present invention provides a kind of combined contamination soil renovation agents, it is characterised in that: described
Reparation each raw material of medicament weight percent are as follows:
Biomass carbon 30-50%；
Calcium hydroxy phosphate 10-20%；
Humic acid potassium 10-20%；
Alpha-cyclodextrin 10-20%；
Diatomite 5-10%；
Plant ash 5-10%；
The biomass carbon is the mass ratio of the stalk and calcium oxide using the mixture of stalk and calcium oxide as raw material
It is obtained for 20:1, vacuum pyrolysis 30min under conditions of system pressure is 20kPa, pyrolysis temperature is 500 DEG C by milled processed
The partial size arrived is 3mm solid powder below；
The calcium hydroxy phosphate, humic acid potassium, alpha-cyclodextrin, diatomite, plant ash are respectively 2mm solid powder below
End.
Further, in the renovation agent each raw material mass percent are as follows:
Biomass carbon 40%；
Calcium hydroxy phosphate 15%；
Humic acid potassium 15%；
Alpha-cyclodextrin 15%；
Diatomite 10%；
Plant ash 5%.
A kind of combined contamination soil renovation agent of the present invention, by by biomass carbon, calcium hydroxy phosphate, humic acid potassium, α-ring
Dextrin, diatomite, plant ash uniformly mix according to the above ratio, and reparation medicament can be obtained.
A kind of application method of combined contamination soil renovation agent of the present invention, comprising the following steps:
(1) pedotheque containing heavy-metal composite pollution is taken, is detected using specified in " soil environment monitoring technical specification "
Method measures the content of available heavy metal in pedotheque；
(2) according to testing result, it heavy-metal composite pollution soil in mass ratio: repairs medicament=50~200:1 addition and repairs
Multiple medicament, will repair the uniform shakedown of medicament and is sprinkled upon soil surface to be processed；
(3) use the mode for turning over stirring soil to be processed is connected to the reparation medicament spilt on its upper berth be stirred 3 times with
On, mixed soil is formed, adding water to keep the water content of mixed soil is more than 50%；
(4) the plastic covering film on mixed soil, maintenance 3 days or more reparation medicament and the heavy metals made in mixed soil
Heavy metal in contaminated soil is sufficiently reacted and is stabilized；
(5) in sample detecting mixed soil available heavy metal ion content.
A kind of present invention --- combined contamination soil renovation agent, reference " standard of soil environment quality " (GB15618-1995),
Using single factor contaminant index evaluation assessment, repairing and treating is carried out to combined contamination soil.Compared with prior art, of the invention to repair
Multiple medicament has the advantages that preparation method is simple, feasible, regulation effect is good.
Compared with the existing technology, the beneficial effects of the present invention are:
1, the biomass carbon in renovation agent is obtained by vacuum pyrolysis biomass, under vacuum conditions biomass carbon obtained
Porosity is high, and adsorptive value is high；Using biomass such as stalks as raw material, resource is made full use of, avoids environmental pollution caused by burning because of it.
The yield of stalk charcoal during vacuum pyrolysis is promoted to increase by addition calcium oxide, the biomass obtained by vacuum pyrolysis
Charcoal has large specific surface area, and duct is abundant, easily adsorbs all kinds of heavy metal ion, reduces migration heavy metal ion in soil
Concentration；Calcium oxide itself in biomass carbon obtained can make soil pH value improve the increase of soil surface negative electrical charge, thus soil
The compatibility of heavy metal is increased；Another aspect pH value increases, and is also beneficial to the presence of MOH+ and improves the suction of heavy metal ion
Attached amount, while heavy metal in soil being promoted to form hydroxide or reference state precipitating or co-precipitation.
2, the plant ash repaired in medicament effectively adjusts the nutrient in soil, improves soil；It is used as basic species simultaneously
Verifying restoring cadmium polluted has synergistic effect；
3, alpha-cyclodextrin is the cone cylinder shape molecule being made of glucose ring, is made of six glucose glycan molecules.Cyclodextrin circle
Be hydrophobic region in cylinder, drum diameter is about 0.6nm, have accommodate other shapes and the molecule of lyophobic dust being sized for or
Group and be embedded in hole, form the characteristic of inclusion compound.Cyclodextrin adsorbs heavy metal ion and organic pollutant, substantially passes through
What tetra-inclusion complex carried out.Alpha-cyclodextrin can directly and heavy metal ion coordination generates multi-nuclear metal compound.
4, calcium hydroxy phosphate, 6 (OH) 2 of chemical formula Ca10 (PO4), the hydroxyl nature having is closer to the hydroxyl in organic matter
Base, hydroxyl be not it is alkaline, it is easier to dissociate hydrogen ion, has ability in conjunction with heavy metal ion.
5, humic acid potassium is a kind of non-uniform aromatic hydroxy-carboxylic salt of macromolecule, and appearance is that black particle or powdery are solid
Body is the product after being extracted after finely being selected by lignite with KOH liquid reactions, is dissolved in water, in alkalinity, contains carboxyl, phenolic hydroxyl group etc.
Active group, heavy metal stabilization ability are strong；
Other than the respective stabilization of said components, complexing, flocculation, precipitating, suction-operated, biomass carbon, diatomite plus
Soil physico-chemical property can be improved well by entering, and greatly enhance the permeability of soil；Said components give full play to synergistic effect, pass through
It stabilizes, chelating, complexing, precipitating, absorption, improvement, adjust pH value, so that the leaching rate of available heavy metal in the soil is significantly
It reduces.
Specific embodiment
Repair the preparation embodiment 1 of medicament:
Using the mixture of stalk and calcium oxide as raw material, the mass ratio of the stalk and calcium oxide is 20:1, in system pressure
Vacuum pyrolysis 30min under conditions of power is 20kPa, pyrolysis temperature is 500 DEG C, the partial size obtained by milled processed be 3mm with
Under solid powder；
Acquisition partial size is 2mm calcium hydroxy phosphate below, humic acid potassium, alpha-cyclodextrin, diatomite, plant ash solid powder
End；
It weighs according to mass percent:
Biomass carbon 40%；
Calcium hydroxy phosphate 15%；
Humic acid potassium 15%；
Alpha-cyclodextrin 15%；
Diatomite 10%；
Plant ash 5%.
Biomass carbon, calcium hydroxy phosphate, humic acid potassium, alpha-cyclodextrin, diatomite, plant ash are mixed according to the above ratio,
Reparation medicament is prepared.
Repair the preparation embodiment 2 of medicament:
Using the mixture of stalk and calcium oxide as raw material, the mass ratio of the stalk and calcium oxide is 20:1, in system pressure
Vacuum pyrolysis 30min under conditions of power is 20kPa, pyrolysis temperature is 500 DEG C, the partial size obtained by milled processed be 3mm with
Under solid powder；
Acquisition partial size is 2mm calcium hydroxy phosphate below, humic acid potassium, alpha-cyclodextrin, diatomite, plant ash solid powder
End；
It weighs according to mass percent:
Biomass carbon 50%；
Calcium hydroxy phosphate 20%；
Humic acid potassium 10%；
Alpha-cyclodextrin 10%；
Diatomite 5%；
Plant ash 5%.
Biomass carbon, calcium hydroxy phosphate, humic acid potassium, alpha-cyclodextrin, diatomite, plant ash are mixed according to the above ratio,
Reparation medicament is prepared.
Repair the preparation embodiment 3 of medicament:
Using the mixture of stalk and calcium oxide as raw material, the mass ratio of the stalk and calcium oxide is 20:1, in system pressure
Vacuum pyrolysis 30min under conditions of power is 20kPa, pyrolysis temperature is 500 DEG C, the partial size obtained by milled processed be 3mm with
Under solid powder；
Acquisition partial size is 2mm calcium hydroxy phosphate below, humic acid potassium, alpha-cyclodextrin, diatomite, plant ash solid powder
End；
It weighs according to mass percent:
Biomass carbon 30%；
Calcium hydroxy phosphate 10%；
Humic acid potassium 20%；
Alpha-cyclodextrin 20%；
Diatomite 10%；
Plant ash 10%.
Biomass carbon, calcium hydroxy phosphate, humic acid potassium, alpha-cyclodextrin, diatomite, plant ash are mixed according to the above ratio,
Reparation medicament is prepared.
The resulting renovation agent application specific embodiment of embodiment 1-3 and technical effect:
300 kilograms of cadmium lead arsenic combined contamination soils are derived from Hengyang, Hunan Province farmland.
(1) " soil quality Available Lead and Cadmium detrmination atomic absorption method " (GB/T23739-2009) and " soil is used
Environmental monitoring technology specification " specified in detection method measurement pedotheque in available Cd content be 13.22mg/kg, effectively
State lead content is 22.17mg/kg, available state arsenic 16.18mg/kg.
(2) 300 kilograms of combined contamination soils are divided into three equal parts, 100 kilograms of every equal portions extract embodiment 1- respectively
Each 2 kilograms of the reparation medicament provided in 3, the surface that will be repaired the uniform shakedown of medicament respectively and be sprinkled upon 100 kilograms of soil to be processed；
(3) soil to be processed is connected to the reparation medicament spilt on its upper berth by the way of stirring and is stirred 3 times or more, shape
At mixed soil, adding water to keep the water content of mixed soil is more than 50%；
(4) the plastic covering film on mixed soil conserves 3 days, allow reparation medicament in mixed soil with it is heavy metal-polluted
Cadmium lead arsenic in dye soil sufficiently reacts, sufficient stabilization；
(5) content for the soil available Cd lead arsenic that sample detecting embodiment 1-3 is applied respectively, soil available Cd
Lead arsenic content the results are shown in Table 1, be all satisfied the requirement of second level agricultural soil in " standard of soil environment quality " (GB15618-1995).
The resulting renovation agent application result of 1 embodiment 1-3 of table
Claims (6)
1. a kind of soil-repairing agent, which is characterized in that the weight percent for repairing each raw material of medicament are as follows:
Biomass carbon 30-50%；
Calcium hydroxy phosphate 10-20%；
Humic acid potassium 10-20%；
Alpha-cyclodextrin 10-20%；
Diatomite 5-10%；
Plant ash 5-10%.
The biomass carbon is the mixture of stalk and calcium oxide, and the mass ratio of the stalk and calcium oxide is 20:1.
2. a kind of biomass carbon according to claim 1, which is characterized in that the biomass carbon is that partial size 3mm is below
Solid powder.
3. a kind of soil-repairing agent according to claim 1, which is characterized in that the calcium hydroxy phosphate, humic acid potassium, α-
Cyclodextrin, diatomite, plant ash are partial size 2mm solid powder below.
4. a kind of soil-repairing agent according to claim 1, it is characterised in that: the weight of reparation each raw material of medicament
Percentage are as follows:
Biomass carbon 40%；
Calcium hydroxy phosphate 15%；
Humic acid potassium 15%；
Alpha-cyclodextrin 15%；
Diatomite 10%；
Plant ash 5%.
5. a kind of preparation method of soil-repairing agent, which is characterized in that including following preparation step:
(1) stalk and calcium oxide are weighed in mass ratio, under conditions of system pressure is 20kPa, pyrolysis temperature is 500 DEG C, very
Sky pyrolysis 30min, is 3mm solid powder below by the partial size that milled processed obtains.
(2) by weight percentage, by biomass carbon made from step (1) and calcium hydroxy phosphate, humic acid potassium, alpha-cyclodextrin,
Diatomite, plant ash are sufficiently stirred, and are uniformly mixed, and soil-repairing agent is made.
6. a kind of soil-repairing agent according to claim 1, which is characterized in that the soil-repairing agent is repairing cadmium lead arsenic
It is applied in combined contamination soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810645105.0A CN108929696A (en) | 2016-02-04 | 2016-02-04 | A kind of soil-repairing agent and preparation method thereof |
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| CN201810645105.0A CN108929696A (en) | 2016-02-04 | 2016-02-04 | A kind of soil-repairing agent and preparation method thereof |
| CN201610079842.XA CN105583223B (en) | 2016-02-04 | 2016-02-04 | A kind of combined contamination soil renovation agent and application |
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| CN109913231A (en) * | 2019-04-18 | 2019-06-21 | 江西师范大学 | A kind of novel inorganic-biological carbon soil passivator and preparation method thereof |
| CN114538892A (en) * | 2022-03-25 | 2022-05-27 | 浙江寰龙环境科技有限公司 | Low-cost ceramsite preparation process based on harmless treatment of polluted soil |
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| CN106433657A (en) * | 2016-08-25 | 2017-02-22 | 惠安华晨贸易有限公司 | Chromium-contaminated soil remediation agent and preparation method thereof |
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| CN105583223A (en) | 2016-05-18 |
| CN105583223B (en) | 2018-08-07 |
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