CN109772868A - The ecological environment of soil restorative procedure for preventing and treating heavy metal pollution - Google Patents
The ecological environment of soil restorative procedure for preventing and treating heavy metal pollution Download PDFInfo
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Abstract
The invention discloses a kind of ecological environment of soil restorative procedures for preventing and treating heavy metal pollution, include the following steps: sieving approach: contaminated soil being carried out sieving approach with mechanical equipment；It is preliminary to repair: the leacheate of 3.5-4 times of soil volume is added, reacts preliminary treatment 6-8h at 26-28 DEG C；Mud-water separation: carrying out mud-water separation, and isolated soil carries out secondary reparation；Secondary reparation: soil-repairing agent is added in preliminary rehabilitating soil, is added the tap water of soil quality a quarter, is uniformly mixed, repair process 3-5d at 26-28 DEG C.The present invention elutes the soil of heavy metal pollution using preliminary repair with secondary reparation, preliminary repair using leacheate, and leacheate uses the aqueous solution of organic acid, can wash away the part heavy metal in soil；Secondary repair is repaired using soil-repairing agent, can carry out continuing absorption, degradation to the heavy metal not washed away, while it is added in soil the fertility that can also improve soil.
Description
Technical field
The invention belongs to technical field of soil remediation, and in particular, to a kind of soil ecology ring for preventing and treating heavy metal pollution
Border restorative procedure.
Background technique
Important component of the soil as earth environment, the quality of soil environment and our life are closely bound up, together
When or ecological environment important component, and it is the final home to return to of various pollutants, in the world 90% pollution again
Object is finally detained in the soil.
Based on inorganic pollution, organic pollutant takes second place soil pollution type, and combined pollution proportion is smaller, inorganic
The 82.8% of exceeded exceeded digit Zhan of pollutant total digit.Soil pollution leads to soil fertility reduction, agricultural output
The problems such as with quality degradation, pollutant, which is transmitted and is enriched with by forms such as food chains, endangers human health and life
State environment.
It is directed to contaminated soil at present, common restorative procedure includes soil improvement by importing soil from other places, chemical leaching method, curing stabilization method, electricity
Power repairing method, oxidation-reduction method, was deactivation method and the methods of biological prosthetic at extraction originally.But these technologies all exist centainly
Defect and the scope of application, or that there are at high cost, engineering difficulty is big, the limitation such as to be improved of repairing pollution limitation, repairing effect
Condition.
Summary of the invention
The purpose of the present invention is to provide a kind of ecological environment of soil restorative procedures for preventing and treating heavy metal pollution, to heavy metal
Contaminated soil is eluted with secondary reparation, preliminary repair using leacheate using preliminary repair, and leacheate uses organic acid
Aqueous solution, the part heavy metal in soil can be washed away；Secondary repair is repaired using soil-repairing agent, soil-repairing agent
It, can be to the heavy metal not washed away including white lime, charcoal, inorganic adsorbing material, modified meerschaum, bioprosthetic material
It carries out continuing absorption, degradation, while it is added in soil the fertility that can also improve soil, increases the microorganism in soil；It is logical
It crosses different methods to be repaired twice, there is extremely apparent repairing effect, and do not generate the secondary pollution to soil.
The purpose of the present invention can be achieved through the following technical solutions:
The ecological environment of soil restorative procedure for preventing and treating heavy metal pollution, includes the following steps:
Sieving approach: carrying out sieving approach for contaminated soil with mechanical equipment, make average particle size≤20mm of soil particle,
Obtain pretreatment contaminated soil；
It is preliminary to repair: pretreatment contaminated soil being moved into processing pond, the leacheate of 3.5-4 times of soil volume, stirring is added
It is uniformly mixed soil with leacheate, preliminary treatment 6-8h is reacted at 26-28 DEG C；
Mud-water separation: the soil after the completion of preliminary reparation carries out mud-water separation, and isolated waste water is anti-by electrochemistry
It should handle, heavy metal is made to form precipitation and separation, isolated soil carries out secondary reparation；
Secondary reparation: soil-repairing agent is added in preliminary rehabilitating soil according to mass ratio 1:80-90, adds soil
The tap water of quality a quarter, is uniformly mixed, and repair process 3-5d at 26-28 DEG C obtains repairing soil up to standard.
Further, the soil-repairing agent is made of following raw material: 15-20 parts of white lime, charcoal 18-24
Part, 16-20 parts of inorganic adsorbing material, 6-9 parts of modified meerschaum, 10-13 parts of bioprosthetic material；
White lime, charcoal, inorganic adsorbing material, modified meerschaum and bioprosthetic material are mixed according to parts by weight
Uniformly, the soil-repairing agent is made.
Further, the inorganic adsorbing material includes hydroxyapatite, diatomite, zeolite, hydroxyapatite, diatom
Soil, zeolite are that 1:0.5-0.6:0.2-0.3 is compounded according to mass ratio.
Further, the charcoal comprises the following steps:
By it the drying of mushroom slag, crushed 80 meshes after, obtained powder is in N2Under conditions of protection, holding heating rate is
5 DEG C/min, 4h is cracked at 460 DEG C, obtains charcoal.
Further, modified meerschaum is prepared by the following method:
(1) sepiolite is weighed according to solid-liquid ratio 1g:20mL and deionized water is added, stir evenly, then be placed in high-speed mixer
On, 10000r/min stirs 15min under room temperature, obtains sepiolite mixed liquor；
(2) it weighs biochemical fulvic acid to be added in deionized water, is configured to the biochemical fulvic acid aqueous solution of 5g/mL, it is spare；
(3) biochemical fulvic acid aqueous solution is added in sepiolite mixed liquor for 1:0.9-1.1 according to volume ratio, 10000r/
Min high-speed stirred 12h；
(4) after the completion of stirring, mixed liquor is transferred in Buchner funnel, is filtered, using deionized water repeated flushing 4-5
It is secondary, the filter cake filtered is put into 60 DEG C of vacuum ovens, dry 12h grinds after dry, sieves with 100 mesh sieve, and obtains modified sea
Afrodite.
Further, the bioprosthetic material is prepared by the following method:
(1) malt root drying and crushing is crossed into 40 meshes, obtains malt root powder, weighed 13g malt root powder and be added in reaction kettle,
260mL deionized water, 0.7g copper chloride are sequentially added, reaction kettle is sealed, keeps 250r/min at the uniform velocity to stir, heat temperature raising
To 165-175 DEG C, isothermal reaction 22-28min, solid is collected in filtering；
(2) thiobacillus ferrooxidant is seeded in PDA culture medium, picking conidium, connects after 25 DEG C of constant temperature incubation 3d
Kind cultivates 30-35min into fluid nutrient medium, in 200r/min, obtains bacterium solution；
(3) 10g solid made from step (1) is weighed, as solid medium, bacterium solution is accessed with 5% inoculum concentration after sterilizing,
Add 20mL aqua sterilisa, oscillation cultivates 6d under 25 DEG C, the humidity environment of 45-50% after mixing, and takes out and air-dries, biology is made
Repair materials.
Beneficial effects of the present invention:
The present invention uses leacheate elution tentatively to repair the soil of heavy metal pollution first, and leacheate is using natural
The aqueous solution of organic acid, such as tartaric acid, citric acid, malic acid, the concentration of aqueous solutions of organic acids is 10-13%, natural organic acids
The basic structure of molecule is aromatic ring and alicyclic ring, there is the groups such as carboxyl, hydroxyl, carbonyl and methoxyl group on ring, has friendship to metal ion
It changes, be complexed or chelation, easily form soluble compound with heavy metal, and be easily biodegradable, it is environmentally protective；
The present invention carries out secondary reparation to soil using soil-repairing agent, and soil-repairing agent includes white lime, charcoal, nothing
Machine adsorbent material, modified meerschaum, bioprosthetic material, wherein 1) white lime acts on energy to the chemical passivation of various heavy
Enough obstruct the migration of heavy metal, the physisorption of charcoal adsorbs the heavy metals such as Hg in soil, reduces pollution
Heavy metal in soil content achievees the purpose that synergistic resistance moves；2) during Pintsch process mushroom slag prepares charcoal, biology
Matter part organic matter decomposes at high temperature to be generated gas and liquid component and is lost, and gained charcoal is a kind of solid rich in carbon
Material, has biggish surface area, and porous surface has very strong adsorption capacity；3) contained using the charcoal of mushroom slag preparation
Nitrogen quantity is higher, and C/N ratio is relatively small, can increase plant after being manured into soil to the utilization efficiency of nitrogenous fertilizer in soil, subtract simultaneously
The loss of few nitrogenous fertilizer, promotes soil fertility；4) sepiolite has unique nanoclub-like crystal structure, under high velocity agitation can
Fast hydrating, while stick intergranular forms tridimensional network by electrostatic and van der Waals interaction；Biochemical fulvic acid contain carboxyl,
Multiple binding sites such as alcoholic extract hydroxyl group and phenolic hydroxyl group can form minerals-fulvic acid colloid in conjunction with minerals；Sepiolite is through life
Change fulvic acid modified, obtains the functional groups such as a large amount of carboxyl after surface grafting biochemical fulvic acid and increase absorption point；It is modified
Absorption of the sepiolite to heavy metal ion, first is that electronegative adsorption site in modified meerschaum, second is that sepiolite itself has
Hydroxyl (derive from sepiolite) or carboxyl and heavy metal ion between hydrogen bond action, the modification of fulvic acid increases absorption
Site improves suction-operated of the sepiolite to heavy metal ion；5) using malt root as raw material, after hydrothermal treatment, by mixed
Bacterium, which is fermented, is made geobiont repair material, and obtained repair materials, which are negative, is loaded with the malt root of thiobacillus ferrooxidant, the reparation
Material can effectively inhibit the soil-borne pathogen in soil, improve quantity of useful microbe, repair the ecological environment being destroyed；It is negative
The thiobacillus ferrooxidant and the heavy metal in biodegradable soil of load, are moved, fixed or are turned to the heavy metal in soil
Change etc., reduce the content of heavy metal in soil；Soil-repairing agent carries out secondary reparation to soil from many aspects, can substantially reduce
The content of heavy metal in soil, and improve the fertility of soil；
The present invention carries out the soil of heavy metal pollution using preliminary repair with secondary reparation, preliminary repair using leacheate
Elution, leacheate use the aqueous solution of organic acid, can wash away the part heavy metal in soil；Secondary repair uses soil remediation
Agent is repaired, and soil-repairing agent includes white lime, charcoal, inorganic adsorbing material, modified meerschaum, bioprosthetic material,
The heavy metal not washed away can be carried out continuing absorption, degradation, while it is added in soil the fertility that can also improve soil,
Increase the microorganism in soil；It is repaired twice by different methods, there is extremely apparent repairing effect, and do not produce
The raw secondary pollution to soil.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
The ecological environment of soil restorative procedure for preventing and treating heavy metal pollution, includes the following steps:
Sieving approach: carrying out sieving approach for contaminated soil with mechanical equipment, make average particle size≤20mm of soil particle,
Obtain pretreatment contaminated soil；
It is preliminary to repair: pretreatment contaminated soil being moved into processing pond, the leacheate of 3.5-4 times of soil volume, stirring is added
It is uniformly mixed soil with leacheate, preliminary treatment 6-8h is reacted at 26-28 DEG C；
Mud-water separation: the soil after the completion of preliminary reparation carries out mud-water separation, and isolated waste water is anti-by electrochemistry
It should handle, heavy metal is made to form precipitation and separation, isolated soil carries out secondary reparation；
Secondary reparation: soil-repairing agent is added in preliminary rehabilitating soil according to mass ratio 1:80-90, adds soil
The tap water of quality a quarter, is uniformly mixed, and repair process 3-5d at 26-28 DEG C obtains repairing soil up to standard；
The leacheate uses the aqueous solution of natural organic acids, such as tartaric acid, citric acid, malic acid, aqueous solutions of organic acids
Concentration be 10-13%, the basic structure of natural organic acids molecule is aromatic ring and alicyclic ring, there is carboxyl, hydroxyl, carbonyl and first on ring
The groups such as oxygroup have exchange, complexing or chelation to metal ion, soluble compound are easily formed with heavy metal, and easily
It is biodegradable, it is environmentally protective；
The soil-repairing agent is made of following raw material: 15-20 parts of white lime, 18-24 parts of charcoal, inorganic
16-20 parts of adsorbent material, 6-9 parts of modified meerschaum, 10-13 parts of bioprosthetic material；
White lime, charcoal, inorganic adsorbing material, modified meerschaum and bioprosthetic material are mixed according to parts by weight
Uniformly, the soil-repairing agent is made；
White lime can obstruct the migration of heavy metal, the physical absorption of charcoal to the chemical passivation effect of various heavy
It acts on and the heavy metals such as Hg in soil is adsorbed, reduce Heavy Metals in Contaminated Soils content, achieve the purpose that synergistic resistance moves；
The inorganic adsorbing material includes hydroxyapatite, diatomite, zeolite, hydroxyapatite, diatomite, zeolite according to
Mass ratio is that 1:0.5-0.6:0.2-0.3 is compounded；
The charcoal comprises the following steps:
By it the drying of mushroom slag, crushed 80 meshes after, obtained powder is in N2Under conditions of protection, holding heating rate is
5 DEG C/min, 4h is cracked at 460 DEG C, obtains charcoal；
During Pintsch process mushroom slag prepares charcoal, biomass portion organic matter decomposes at high temperature generates gas
Body and liquid component and be lost, gained charcoal is a kind of solid material rich in carbon, has biggish surface area, and surface is more
Hole has very strong adsorption capacity；The charcoal nitrogen content prepared using mushroom slag is higher, and C/N ratio is relatively small, applies soil
Plant can be can increase after earth to the utilization efficiency of nitrogenous fertilizer in soil, while reducing the loss of nitrogenous fertilizer, promote soil fertility；
Modified meerschaum is prepared by the following method:
Sepiolite is weighed according to solid-liquid ratio 1g:20mL, deionized water is added, stir evenly, then be placed on high-speed mixer,
10000r/min stirs 15min under room temperature, obtains sepiolite mixed liquor；
It weighs biochemical fulvic acid to be added in deionized water, is configured to the biochemical fulvic acid aqueous solution of 5g/mL, it is spare；
Biochemical fulvic acid aqueous solution is added in sepiolite mixed liquor for 1:0.9-1.1 according to volume ratio, 10000r/min
High-speed stirred 12h；
After the completion of stirring, mixed liquor is transferred in Buchner funnel, is filtered, using deionized water repeated flushing 4-5 times,
To remove remaining biochemical fulvic acid, the filter cake filtered is put into 60 DEG C of vacuum ovens, dry 12h, ground after dry,
It sieves with 100 mesh sieve, obtains modified meerschaum；
Sepiolite has unique nanoclub-like crystal structure, under high velocity agitation can fast hydrating, while stick intergranular
Tridimensional network is formed by electrostatic and van der Waals interaction；It is more that biochemical fulvic acid contains carboxyl, alcoholic extract hydroxyl group and phenolic hydroxyl group etc.
A binding site can form minerals-fulvic acid colloid in conjunction with minerals；Sepiolite is modified through biochemical fulvic acid, surface
It has been grafted after biochemical fulvic acid and has obtained the functional groups such as a large amount of carboxyl and increase absorption point；Modified meerschaum is to heavy metal ion
Absorption, first is that electronegative adsorption site in modified meerschaum, second is that the hydroxyl that sepiolite itself has (derives from Hai Pao
Stone) or carboxyl and heavy metal ion between hydrogen bond action, the modification of fulvic acid increases adsorption site, improves sepiolite
Suction-operated to heavy metal ion；
The bioprosthetic material is prepared by the following method:
(1) malt root drying and crushing is crossed into 40 meshes, obtains malt root powder, weighed 13g malt root powder and be added in reaction kettle,
260mL deionized water, 0.7g copper chloride are sequentially added, reaction kettle is sealed, keeps 250r/min at the uniform velocity to stir, heat temperature raising
To 165-175 DEG C, isothermal reaction 22-28min, solid is collected in filtering；
(2) thiobacillus ferrooxidant is seeded in PDA culture medium, picking conidium, connects after 25 DEG C of constant temperature incubation 3d
Kind cultivates 30-35min into fluid nutrient medium, in 200r/min, obtains bacterium solution；
(3) 10g solid made from step (1) is weighed, as solid medium, bacterium solution is accessed with 5% inoculum concentration after sterilizing,
Add 20mL aqua sterilisa, oscillation cultivates 6d under 25 DEG C, the humidity environment of 45-50% after mixing, and takes out and air-dries, biology is made
Repair materials；
Using malt root as raw material, after hydrothermal treatment, geobiont repair material is made by mixed fungus fermentation, what is obtained repairs
Multiple material, which is negative, is loaded with the malt root of thiobacillus ferrooxidant, which can effectively inhibit the soil-borne pathogen in soil,
Quantity of useful microbe is improved, the ecological environment being destroyed is repaired；The thiobacillus ferrooxidant of load is again in biodegradable soil
Heavy metal, the heavy metal in soil is moved, fixed or is converted, the content of heavy metal in soil is reduced.
Embodiment 1
The ecological environment of soil restorative procedure for preventing and treating heavy metal pollution, includes the following steps:
Sieving approach: carrying out sieving approach for contaminated soil with mechanical equipment, make average particle size≤20mm of soil particle,
Obtain pretreatment contaminated soil；
It is preliminary to repair: pretreatment contaminated soil being moved into processing pond, 3.5 times of soil volume of leacheate is added, stirring makes
Soil is uniformly mixed with leacheate, and preliminary treatment 6h is reacted at 26 DEG C；
Mud-water separation: the soil after the completion of preliminary reparation carries out mud-water separation, and isolated waste water is anti-by electrochemistry
It should handle, heavy metal is made to form precipitation and separation, isolated soil carries out secondary reparation；
Secondary reparation: soil-repairing agent is added in preliminary rehabilitating soil according to mass ratio 1:80, adds soil matter
The tap water for measuring a quarter, is uniformly mixed, repair process 3d at 26 DEG C obtains repairing soil up to standard；
The soil-repairing agent is made of following raw material: 15 parts of white lime, 18 parts of charcoal, inorganic adsorbing material
16 parts, 6 parts of modified meerschaum, 10 parts of bioprosthetic material；
White lime, charcoal, inorganic adsorbing material, modified meerschaum and bioprosthetic material are mixed according to parts by weight
Uniformly, the soil-repairing agent is made.
Embodiment 2
The ecological environment of soil restorative procedure for preventing and treating heavy metal pollution, includes the following steps:
Sieving approach: carrying out sieving approach for contaminated soil with mechanical equipment, make average particle size≤20mm of soil particle,
Obtain pretreatment contaminated soil；
It is preliminary to repair: pretreatment contaminated soil being moved into processing pond, 3.8 times of soil volume of leacheate is added, stirring makes
Soil is uniformly mixed with leacheate, and preliminary treatment 7h is reacted at 27 DEG C；
Mud-water separation: the soil after the completion of preliminary reparation carries out mud-water separation, and isolated waste water is anti-by electrochemistry
It should handle, heavy metal is made to form precipitation and separation, isolated soil carries out secondary reparation；
Secondary reparation: soil-repairing agent is added in preliminary rehabilitating soil according to mass ratio 1:85, adds soil matter
The tap water for measuring a quarter, is uniformly mixed, repair process 4d at 27 DEG C obtains repairing soil up to standard；
The soil-repairing agent is made of following raw material: 18 parts of white lime, 21 parts of charcoal, inorganic adsorbing material
18 parts, 7.5 parts of modified meerschaum, 11.5 parts of bioprosthetic material；
White lime, charcoal, inorganic adsorbing material, modified meerschaum and bioprosthetic material are mixed according to parts by weight
Uniformly, the soil-repairing agent is made.
Embodiment 3
The ecological environment of soil restorative procedure for preventing and treating heavy metal pollution, includes the following steps:
Sieving approach: carrying out sieving approach for contaminated soil with mechanical equipment, make average particle size≤20mm of soil particle,
Obtain pretreatment contaminated soil；
It is preliminary to repair: pretreatment contaminated soil being moved into processing pond, 4 times of soil volume of leacheate is added, stirring makes soil
Earth is uniformly mixed with leacheate, and preliminary treatment 8h is reacted at 28 DEG C；
Mud-water separation: the soil after the completion of preliminary reparation carries out mud-water separation, and isolated waste water is anti-by electrochemistry
It should handle, heavy metal is made to form precipitation and separation, isolated soil carries out secondary reparation；
Secondary reparation: soil-repairing agent is added in preliminary rehabilitating soil according to mass ratio 1:90, adds soil matter
The tap water for measuring a quarter, is uniformly mixed, repair process 5d at 28 DEG C obtains repairing soil up to standard；
The soil-repairing agent is made of following raw material: 20 parts of white lime, 24 parts of charcoal, inorganic adsorbing material
20 parts, 9 parts of modified meerschaum, 13 parts of bioprosthetic material；
White lime, charcoal, inorganic adsorbing material, modified meerschaum and bioprosthetic material are mixed according to parts by weight
Uniformly, the soil-repairing agent is made.
After tested, by the soil of embodiment 1-3 repair process, wherein the amount of heavy metal (Hg, Pb, Cd) reduces
62.5-70% illustrates that most heavy metal can be washed away or be adsorbed, and restorative procedure of the invention can be effectively reduced soil
Content of beary metal in earth.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (6)
1. the ecological environment of soil restorative procedure for preventing and treating heavy metal pollution, which comprises the steps of:
Sieving approach: contaminated soil is subjected to sieving approach with mechanical equipment, makes average particle size≤20mm of soil particle, obtains
Pre-process contaminated soil；
It is preliminary to repair: pretreatment contaminated soil being moved into processing pond, the leacheate of 3.5-4 times of soil volume is added, stirring makes soil
Earth is uniformly mixed with leacheate, and preliminary treatment 6-8h is reacted at 26-28 DEG C；
Mud-water separation: the soil after the completion of preliminary reparation carries out mud-water separation, and isolated waste water passes through at electrochemical reaction
Reason, makes heavy metal form precipitation and separation, and isolated soil carries out secondary reparation；
Secondary reparation: soil-repairing agent is added in preliminary rehabilitating soil according to mass ratio 1:80-90, adds soil quality
The tap water of a quarter, is uniformly mixed, and repair process 3-5d at 26-28 DEG C obtains repairing soil up to standard.
2. the ecological environment of soil restorative procedure of prevention and treatment heavy metal pollution according to claim 1, which is characterized in that described
Soil-repairing agent is made of following raw material: 15-20 parts of white lime, 18-24 parts of charcoal, inorganic adsorbing material 16-20
Part, 6-9 parts of modified meerschaum, 10-13 parts of bioprosthetic material；
White lime, charcoal, inorganic adsorbing material, modified meerschaum and bioprosthetic material are mixed according to parts by weight equal
It is even, the soil-repairing agent is made.
3. the ecological environment of soil restorative procedure of prevention and treatment heavy metal pollution according to claim 2, which is characterized in that described
Inorganic adsorbing material includes hydroxyapatite, diatomite, zeolite, and hydroxyapatite, diatomite, zeolite are 1 according to mass ratio:
0.5-0.6:0.2-0.3 is compounded.
4. the ecological environment of soil restorative procedure of prevention and treatment heavy metal pollution according to claim 2, which is characterized in that described
Charcoal comprises the following steps:
By it the drying of mushroom slag, crushed 80 meshes after, obtained powder is in N2Under conditions of protection, keep heating rate be 5 DEG C/
Min cracks 4h at 460 DEG C, obtains charcoal.
5. the ecological environment of soil restorative procedure of prevention and treatment heavy metal pollution according to claim 2, which is characterized in that modified
Sepiolite is prepared by the following method:
(1) sepiolite is weighed according to solid-liquid ratio 1g:20mL and deionized water is added, stir evenly, then be placed on high-speed mixer, often
The lower 10000r/min of temperature stirs 15min, obtains sepiolite mixed liquor；
(2) it weighs biochemical fulvic acid to be added in deionized water, is configured to the biochemical fulvic acid aqueous solution of 5g/mL, it is spare；
(3) biochemical fulvic acid aqueous solution is added in sepiolite mixed liquor for 1:0.9-1.1 according to volume ratio, 10000r/min high
Speed stirring 12h；
(4) after the completion of stirring, mixed liquor is transferred in Buchner funnel, is filtered, it, will using deionized water repeated flushing 4-5 times
The filter cake filtered is put into 60 DEG C of vacuum ovens, and dry 12h grinds after dry, sieves with 100 mesh sieve, obtains modified meerschaum.
6. the ecological environment of soil restorative procedure of prevention and treatment heavy metal pollution according to claim 2, which is characterized in that described
Bioprosthetic material is prepared by the following method:
(1) malt root drying and crushing is crossed into 40 meshes, obtains malt root powder, weighed 13g malt root powder and be added in reaction kettle, then according to
Secondary addition 260mL deionized water, 0.7g copper chloride seal reaction kettle, keep 250r/min at the uniform velocity to stir, are heated to 165-
175 DEG C, isothermal reaction 22-28min, solid is collected in filtering；
(2) thiobacillus ferrooxidant is seeded in PDA culture medium, picking conidium, is inoculated into after 25 DEG C of constant temperature incubation 3d
In fluid nutrient medium, 30-35min is cultivated in 200r/min, obtains bacterium solution；
(3) 10g solid made from step (1) is weighed, as solid medium, with 5% inoculum concentration access bacterium solution after sterilizing, then plus
Enter 20mL aqua sterilisa, oscillation cultivates 6d under 25 DEG C, the humidity environment of 45-50% after mixing, and takes out and air-dries, is made biological prosthetic
Material.
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| CN112122334A (en) * | 2020-09-08 | 2020-12-25 | 浙江省冶金研究院有限公司 | Method for repairing organic-heavy metal combined contaminated soil by coupling chemical oxidation with biochar and strengthening microorganisms |
| CN112570446A (en) * | 2020-11-17 | 2021-03-30 | 博域环保技术研究院(南京)有限公司 | Environment-friendly soil ecological environment treatment method |
| CN112792118A (en) * | 2020-12-22 | 2021-05-14 | 济南大学 | Method for preparing active filler by using hydroxyapatite, zero-valent iron and humic acid and application thereof |
| CN112958619A (en) * | 2021-02-02 | 2021-06-15 | 辽宁工程技术大学 | Fermentation chemical remediation method and device for heavy metal polluted underground water |
| CN113290031A (en) * | 2021-05-19 | 2021-08-24 | 浙江九达环保科技有限公司 | Deep medicament remediation method for contaminated soil |
| CN117718320A (en) * | 2023-12-25 | 2024-03-19 | 北京安岭生态建设有限公司 | Treatment system and method for heavy metal pollution bottom mud for landscaping |
| CN118106336A (en) * | 2024-02-29 | 2024-05-31 | 江苏暨之阳环保科技有限公司 | Treatment method for heavy metal contaminated soil |
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