CN109337690A - A cadmium-contaminated soil remediation agent - Google Patents
A cadmium-contaminated soil remediation agent Download PDFInfo
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- CN109337690A CN109337690A CN201811139221.1A CN201811139221A CN109337690A CN 109337690 A CN109337690 A CN 109337690A CN 201811139221 A CN201811139221 A CN 201811139221A CN 109337690 A CN109337690 A CN 109337690A
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Abstract
本发明涉及一种镉污染土壤修复剂，属于土壤修复领域。本发明以凹凸棒土和异氰酸酯混合，并用硅烷偶联剂改性，可在无机成分和有机成分界面间架起“分子桥”，提高作用活性，同时盐料中所含Zn2+可对镉离子起到拮抗作用，减少植物对镉离子的吸收，镉离子对作物的毒害作用，起到降低镉离子在土壤的移动性，达到钝化修复镉污染土壤的效果；对白云母和玄武岩进行处理，形成三维交联网络将镉固定，降低镉在土壤中的生物有效性，而蛋白质又可被镉离子所破坏，粘度增大，空间结构变得松散，也可对镉离子起到包裹，降低在土壤中迁移性的效果。本发明解决了目前常用对镉污染土壤使用的土壤修复剂对镉污染土壤的修复效果不佳的问题。The invention relates to a cadmium-contaminated soil remediation agent, belonging to the field of soil remediation. The present invention is mixed with attapulgite and isocyanate, and modified with silane coupling agent, which can set up a "molecular bridge" between the interface of inorganic components and organic components, and improve the action activity. Play an antagonistic role, reduce the absorption of cadmium ions by plants, and the toxic effect of cadmium ions on crops, reduce the mobility of cadmium ions in the soil, and achieve the effect of passivation and repair of cadmium-contaminated soil; the muscovite and basalt are treated to form The three-dimensional cross-linked network fixes cadmium and reduces the bioavailability of cadmium in the soil, while the protein can be destroyed by cadmium ions, the viscosity increases, the spatial structure becomes loose, and it can also encapsulate cadmium ions, reducing the amount of cadmium ions in the soil. The effect of medium mobility. The invention solves the problem that the soil remediation agent commonly used for cadmium-contaminated soil has poor remediation effect on the cadmium-contaminated soil.
Description
Technical field
The invention belongs to technical field of soil remediation, and in particular to a kind of cadmium pollution soil renovation agent.
Background technique
It will cause soil acidification currently, chemical fertilizer is excessively used, and then induce the active raising of soil heavy metal ion.Soil
Earth pH value one unit of every decline, the activity of heavy metal cadmium will promote 100 times, increase the illness wind of the difficult and complicated illness such as Itai-itai diseases
Danger.The maximum feature of agricultural non-point source pollution is hiding, chronicity and dispersibility, is during agricultural production links are each
It consciously or not consciously generates, deals with more troublesome.
For current paddy soil and the serious status of rice heavy metal cadmium, the method for rehabilitating soil cadmium includes life
Object repairing method, agricultural regulation method, gongwu method.Biological restoration is repaired thoroughly, but repairing efficiency is long；Agricultural regulation
The method soil low for heavy metal pollution degree is effective and feasible, but then effect compares soil higher for heavy metal pollution degree
Difference；The cost of gongwu method is larger.
Summary of the invention
The technical problems to be solved by the invention: for the common soil-repairing agent used cadmium pollution soil at present to cadmium
The bad problem of the repairing effect of contaminated soil provides a kind of cadmium pollution soil renovation agent.
In order to solve the above technical problems, the present invention is using technical solution as described below:
A kind of cadmium pollution soil renovation agent, according to the mass fraction, including following component: 6~10 parts of thiocarbamides, 3~7 parts of vulcanizations
Sodium, 5~8 parts of humic acid, 3~7 parts of sodium silicates, further includes: 10~15 parts of attapulgite modified, 25~40 parts of composite base-materials.
The attapulgite modified preparation: 12~20:1 in mass ratio takes attapulgite, isocyanates to be mixed, and adds
Enter the silane coupling agent KH-560 of attapulgite quality 6~10%, grind, sieving particle in mass ratio 7~12 is collected in sieving:
Fulvic acid, salt material, auxiliary agent mixing is added in 3:1:2, and liquid nitrogen spraying must freeze material, takes freezing material 8~15:1 in mass ratio that ball is added
The mixing of zirconium oxide ball milling pearl is added by ball 20~30:1 of material mass ratio in grinding media, and ball milling is to get attapulgite modified.
The salt material: 5:1~3 take zinc sulfate, zinc chloride mixing to get salt material in mass ratio.
The auxiliary agent: 5~8:2 in mass ratio takes hydroxyapatite, vermiculite to pulverize and sieve, and collects sieving particle to get helping
Agent.
The ball-milling medium: 4~8:1 takes acetone, glycerol mixing to get ball-milling medium by volume.
The preparation method of the composite base-material, includes the following steps:
(1) 5~8:2 in mass ratio takes basalt, muscovite to pulverize and sieve, and collects sieving particle 1:7~10 in mass ratio
Reagent A is added to be mixed, is stored at room temperature, filters, takes filtration cakes torrefaction, obtain dry cake, according to parts by weight, successively take 20~
30 parts of dry cakes, 10~15 parts of polyallylamines, 12~20 parts of urea, 40~60 parts of reagent B, 3~6 parts of emulsifiers, first take poly-
Allylamine, urea, reagent B are mixed, and emulsifier, dry cake mixing is added, and shearing dispersion obtains pretreatment building stones；
(2) according to parts by weight, successively take 14~25 parts of goose feather, 3~7 parts of lactobacillus bulgaricus, 40~55 parts it is sterile
Water, 3~5 portions of sucrose, in 28~35 DEG C, shaking table oscillation and fermentation obtains fermentation material, fermentation material is taken to sterilize, and obtains sterilization fermentation material, takes and go out
The filtering of bacterium fermentation material, obtains filtrate, takes filtrate concentrated by rotary evaporation, obtain concentrate feed, takes concentrate feed 2~4:7:1 in mass ratio that pre- place is added
Fibrous gypsum material, additive are mixed to get composite base-material.Reagent A in the step (1): 6~10:1 takes carbonic acid in mass ratio
Sodium solution, sodium citrate mixing are to get reagent A.
Reagent B: 12~20:1 in mass ratio in the step (1) takes ethanol solution, polyvinylpyrrolidone mixing, i.e.,
Obtain reagent B.
Emulsifier in the step (1): 7~12:2 in mass ratio takes polyacrylamide, soybean lecithin mixing to get cream
Agent.
Additive in the step (2): 3~6:1 in mass ratio takes methylphenol, metoxyphenol mixing to get adding
Add agent.
The present invention is compared with other methods, and advantageous effects are:
(1) present invention is mixed with attapulgite and isocyanates, and with silane coupler modified, can inorganic constituents with have
Machine plays " molecular bridge " at an interface structure of an essay, improves its action activity, accelerates the complexation reaction of the silicone hydroxyl and cadmium ion on surface, shape
Carry out fixing soil cadmium at complex compound, and modified attapulgite occurs complexation reaction with cadmium ion by surface silanol group and carboxyl and is formed
Complex compound to reduce cadmium ion in the mobility of soil, and turns cadmium to the lower occurrence patterns of activity from activity is higher
Become, and then achieve the effect that be passivated cadmium pollution soil repair, being mixed into fulvic acid has suction-operated to cadmium ion, while in salt material
Contained Zn2+Antagonism can be played to cadmium ion, reduces absorption of the plant to cadmium ion, reduce cadmium ion and the murder by poisoning of crop is made
With, thus play reduce cadmium ion soil mobility, achieve the effect that be passivated cadmium pollution soil repair；
(2) present invention handles muscovite and basalt, other effective components such as coated urea, plays sustained release and makees
With, slowly improve soil fertility, while polyallylamine is added in system, in use, can water swelling in system
Portion is formed three-dimensional crosslinked network, by cadmium sorption and is deposited in the soil of part, is fixed on body by aminoquinoxaline bridged bond
System, reduces the migration of cadmium ion, during carrying out fermentation operation to raw materials such as goose feather, can produce many organic matters, albumen
Matter, and organic matter itself contains or can decompose generation humic acid and humin, can pass through complex reaction and cadmium ion generates and stablizes
Complex compound, cadmium is fixed in the soil, the biological effectiveness of cadmium in the soil is reduced, passivation effect is reached, and protein can
It is destroyed by cadmium ion, viscosity increases, and space structure becomes loosely, and package can also be played to cadmium ion, and reduction is moved in the soil
The effect of shifting property.
Specific embodiment
Salt material: 5:1~3 take zinc sulfate, zinc chloride mixing to get salt material in mass ratio.
Reagent A: 6~10:1 in mass ratio takes the sodium carbonate liquor that mass fraction is 20%, sodium citrate to mix to get examination
Agent A.
Reagent B: 12~20:1 in mass ratio takes the ethanol solution that volume fraction is 70%, polyvinylpyrrolidone mixing,
Up to reagent B.
Auxiliary agent: 5~8:2 in mass ratio takes hydroxyapatite, vermiculite to crushed 150 meshes in pulverizer, collects sieving
Grain is to get auxiliary agent.
Ball-milling medium: 4~8:1 takes acetone, glycerol mixing to get ball-milling medium by volume.
Emulsifier: 7~12:2 in mass ratio takes polyacrylamide, soybean lecithin mixing to get emulsifier.
Additive: 3~6:1 in mass ratio takes methylphenol, metoxyphenol mixing to get additive.
Attapulgite modified preparation: 12~20:1 in mass ratio takes attapulgite, isocyanates mixing, with 450~
The silane coupling agent KH-560 of attapulgite quality 6~10% is added in 700r/min 30~50min of magnetic agitation, with 350~
550r/min grinds 2~4h, crosses 200 meshes, collects sieving particle 7~12:3:1:2 in mass ratio and fulvic acid is added, salt material, helps
Agent mixing, after freezing with liquid nitrogen spraying, must freeze material, take freezing material 8~15:1 in mass ratio that ball-milling medium mixing is added, by ball
Expect that the mixing of zirconium oxide ball milling pearl is added in 20~30:1 of mass ratio, with 400~600r/min ball milling, 1~3h to get modified attapulgite
Soil.
The preparation method of composite base-material, includes the following steps:
(1) 5~8:2 in mass ratio takes basalt, muscovite to crush in pulverizer, crosses 200 meshes, collects sieving particle and presses
Mass ratio 1:7~10 is added reagent A and is mixed, and is stored at room temperature 1~3h, filters, takes filter cake in 60~80 DEG C of oven dryings, obtain
Dry cake successively takes 20~30 parts of dry cakes, 10~15 parts of polyallylamines, 12~20 parts of urea, 40 according to parts by weight
~60 parts of reagent B, 3~6 parts of emulsifiers take polyallylamine, urea, reagent B to mix in reaction kettle, first with 300~500r/min
25~50min is stirred, emulsifier, dry cake mixing are added, 20~45min of dispersion is sheared with 3000~4000r/min, is obtained
Pre-process building stones；
(2) according to parts by weight, successively take 14~25 parts of goose feather, 3~7 parts of lactobacillus bulgaricus, 40~55 parts it is sterile
Water, 3~5 portions of sucrose are in fermentor, in 28~35 DEG C, with 250~380r/min shaking table oscillation and fermentation 3~6 days, obtain fermentation material,
It takes fermentation material to obtain sterilization fermentation material in 121 DEG C of 15~25min of insulated sterilizing in high temperature pot, takes sterilization fermentation material to filter, must filter
Liquid takes filtrate in Rotary Evaporators, under the conditions of 65~70 DEG C of temperature, 600~800kPa of pressure, concentrated by rotary evaporation to original volume
35~50%, concentrate feed is obtained, takes concentrate feed 2~4:7:1 in mass ratio that pretreatment building stones, additive mixing are added, with 700~
30~55min is to get composite base-material for 1000r/min magnetic agitation.
A kind of cadmium pollution soil renovation agent, according to the mass fraction, including following component: 6~10 parts of thiocarbamides, 3~7 parts of vulcanizations
Sodium, 5~8 parts of humic acid, 3~7 parts of sodium silicates, 10~15 parts of attapulgite modified, 25~40 parts of composite base-materials.
A kind of preparation method of cadmium pollution soil renovation agent, includes the following steps:
(1) according to the mass fraction, take 6~10 parts of thiocarbamides, 3~7 parts of vulcanized sodium, 5~8 parts of humic acid, 3~7 parts of sodium silicates,
10~15 parts of attapulgite modified, 25~40 parts of composite base-materials；
(2) prior to 30~45 DEG C, thiocarbamide, vulcanized sodium, composite base-material is taken to mix in batch mixer, with 400~700r/min magnetic
Power stirs 40~60min, then is warming up to 50~65 DEG C, and humic acid, sodium silicate, attapulgite modified mixing is added, with 600~
1~3h of 900r/min magnetic agitation is to get cadmium pollution soil renovation agent.
Embodiment 1
Salt material: 5:1 in mass ratio takes zinc sulfate, zinc chloride mixing to get salt material.
Reagent A: 6:1 in mass ratio takes the sodium carbonate liquor that mass fraction is 20%, sodium citrate to mix to get reagent A.
Reagent B: 12:1 in mass ratio take volume fraction be 70% ethanol solution, polyvinylpyrrolidone mixing to get
Reagent B.
Auxiliary agent: 5:2 in mass ratio takes hydroxyapatite, vermiculite to crushed 150 meshes in pulverizer, collects sieving particle,
Up to auxiliary agent.
Ball-milling medium: 4:1 takes acetone, glycerol mixing to get ball-milling medium by volume.
Emulsifier: 7:2 in mass ratio takes polyacrylamide, soybean lecithin mixing to get emulsifier.
Additive: 3:1 in mass ratio takes methylphenol, metoxyphenol mixing to get additive.
Attapulgite modified preparation: 12:1 in mass ratio takes attapulgite, isocyanates mixing, with 450r/min magnetic force
30min is stirred, the silane coupling agent KH-560 of attapulgite quality 6% is added, 2h is ground with 350r/min, crosses 200 meshes, is received
Fulvic acid, salt material, auxiliary agent mixing is added in collection sieving particle 7:3:1:2 in mass ratio, after freezing with liquid nitrogen spraying, must freeze material,
It takes freezing material 8:1 in mass ratio that ball-milling medium mixing is added, the mixing of zirconium oxide ball milling pearl is added by ball material mass ratio 20:1, with
400r/min ball milling 1h is to get attapulgite modified.
The preparation method of composite base-material, includes the following steps:
(1) 5:2 in mass ratio takes basalt, muscovite to crush in pulverizer, crosses 200 meshes, collects sieving particle and presses matter
Amount is added reagent A than 1:7 and is mixed, and is stored at room temperature 1h, filters, takes filter cake in 60 DEG C of oven dryings, obtain dry cake, by weight
Number meter is measured, 20 parts of dry cakes, 10 parts of polyallylamines, 12 parts of urea, 40 parts of reagent B, 3 parts of emulsifiers is successively taken, first takes poly-
Allylamine, urea, reagent B are mixed in reaction kettle, stir 25min with 300r/min, add emulsifier, dry cake mixing,
Dispersion 20min is sheared with 3000r/min, obtains pretreatment building stones；
(2) according to parts by weight, successively take 14 parts of goose feather, 3 parts of lactobacillus bulgaricus, 40 parts of sterile waters, 3 portions of sucrose in
Fermentor, with 250r/min shaking table oscillation and fermentation 3 days, obtains fermentation material in 28 DEG C, takes fermentation material in high temperature pot, keeps the temperature in 121 DEG C
Sterilize 15min, obtains sterilization fermentation material, takes sterilization fermentation material to filter, obtains filtrate, takes filtrate in Rotary Evaporators, in 65 DEG C of temperature,
Under the conditions of pressure 600kPa, the 35% of concentrated by rotary evaporation to original volume, concentrate feed is obtained, takes concentrate feed 2:7:1 to be in mass ratio added pre-
Building stones, additive mixing are handled, with 700r/min magnetic agitation 30min to get composite base-material.
A kind of cadmium pollution soil renovation agent, according to the mass fraction, including following component: 6 parts of thiocarbamides, 3 parts of vulcanized sodium, 5 parts
Humic acid, 3 parts of sodium silicates, 10 parts of attapulgite modified, 25 parts of composite base-materials.
A kind of preparation method of cadmium pollution soil renovation agent, includes the following steps:
(1) according to the mass fraction, 6 parts of thiocarbamides, 3 parts of vulcanized sodium, 5 parts of humic acid, 3 parts of sodium silicates, 10 parts of modified bumps are taken
Stick soil, 25 parts of composite base-materials；
(2) prior to 30 DEG C, thiocarbamide, vulcanized sodium, composite base-material is taken to mix in batch mixer, with 400r/min magnetic agitation
40min, then 50 DEG C are warming up to, humic acid, sodium silicate, attapulgite modified mixing is added, with 600r/min magnetic agitation 1h, i.e.,
Obtain cadmium pollution soil renovation agent.
Embodiment 2
Salt material: 5:3 in mass ratio takes zinc sulfate, zinc chloride mixing to get salt material.
Reagent A: 10:1 in mass ratio takes the sodium carbonate liquor that mass fraction is 20%, sodium citrate to mix to get reagent
A。
Reagent B: 20:1 in mass ratio take volume fraction be 70% ethanol solution, polyvinylpyrrolidone mixing to get
Reagent B.
Auxiliary agent: 8:2 in mass ratio takes hydroxyapatite, vermiculite to crushed 150 meshes in pulverizer, collects sieving particle,
Up to auxiliary agent.
Ball-milling medium: 8:1 takes acetone, glycerol mixing to get ball-milling medium by volume.
Emulsifier: 12:2 in mass ratio takes polyacrylamide, soybean lecithin mixing to get emulsifier.
Additive: 6:1 in mass ratio takes methylphenol, metoxyphenol mixing to get additive.
Attapulgite modified preparation: 20:1 in mass ratio takes attapulgite, isocyanates mixing, with 700r/min magnetic force
50min is stirred, the silane coupling agent KH-560 of attapulgite quality 10% is added, 4h is ground with 550r/min, crosses 200 meshes,
It collects sieving particle 12:3:1:2 in mass ratio and fulvic acid, salt material, auxiliary agent mixing is added, after being freezed with liquid nitrogen spraying, must freeze
Material, takes freezing material 15:1 in mass ratio that ball-milling medium mixing is added, and the mixing of zirconium oxide ball milling pearl is added by ball material mass ratio 30:1,
With 600r/min ball milling 3h to get attapulgite modified.
The preparation method of composite base-material, includes the following steps:
(1) 8:2 in mass ratio takes basalt, muscovite to crush in pulverizer, crosses 200 meshes, collects sieving particle and presses matter
Amount is added reagent A than 1:10 and is mixed, and is stored at room temperature 3h, filters, takes filter cake in 80 DEG C of oven dryings, obtain dry cake, press
Parts by weight meter successively takes 30 parts of dry cakes, 15 parts of polyallylamines, 20 parts of urea, 60 parts of reagent B, 6 parts of emulsifiers, first takes
Polyallylamine, urea, reagent B are mixed in reaction kettle, stir 50min with 500r/min, it is mixed to add emulsifier, dry cake
It closes, dispersion 45min is sheared with 4000r/min, obtains pretreatment building stones；
(2) according to parts by weight, successively take 25 parts of goose feather, 7 parts of lactobacillus bulgaricus, 55 parts of sterile waters, 5 portions of sucrose in
Fermentor, with 380r/min shaking table oscillation and fermentation 6 days, obtains fermentation material in 35 DEG C, takes fermentation material in high temperature pot, keeps the temperature in 121 DEG C
Sterilize 25min, obtains sterilization fermentation material, takes sterilization fermentation material to filter, obtains filtrate, takes filtrate in Rotary Evaporators, in temperature 70 C,
Under the conditions of pressure 800kPa, the 50% of concentrated by rotary evaporation to original volume, concentrate feed is obtained, takes concentrate feed 4:7:1 to be in mass ratio added pre-
Building stones, additive mixing are handled, with 1000r/min magnetic agitation 55min to get composite base-material.
A kind of cadmium pollution soil renovation agent, according to the mass fraction, including following component: 10 parts of thiocarbamides, 7 parts of vulcanized sodium, 8 parts
Humic acid, 7 parts of sodium silicates, 15 parts of attapulgite modified, 40 parts of composite base-materials.
A kind of preparation method of cadmium pollution soil renovation agent, includes the following steps:
(1) according to the mass fraction, 10 parts of thiocarbamides, 7 parts of vulcanized sodium, 8 parts of humic acid, 7 parts of sodium silicates, 15 parts of modified bumps are taken
Stick soil, 40 parts of composite base-materials；
(2) prior to 45 DEG C, thiocarbamide, vulcanized sodium, composite base-material is taken to mix in batch mixer, with 700r/min magnetic agitation
60min, then 65 DEG C are warming up to, humic acid, sodium silicate, attapulgite modified mixing is added, with 900r/min magnetic agitation 3h, i.e.,
Obtain cadmium pollution soil renovation agent.
Embodiment 3
Salt material: 5:2 in mass ratio takes zinc sulfate, zinc chloride mixing to get salt material.
Reagent A: 8:1 in mass ratio takes the sodium carbonate liquor that mass fraction is 20%, sodium citrate to mix to get reagent A.
Reagent B: 15:1 in mass ratio take volume fraction be 70% ethanol solution, polyvinylpyrrolidone mixing to get
Reagent B.
Auxiliary agent: 7:2 in mass ratio takes hydroxyapatite, vermiculite to crushed 150 meshes in pulverizer, collects sieving particle,
Up to auxiliary agent.
Ball-milling medium: 6:1 takes acetone, glycerol mixing to get ball-milling medium by volume.
Emulsifier: 9:2 in mass ratio takes polyacrylamide, soybean lecithin mixing to get emulsifier.
Additive: 5:1 in mass ratio takes methylphenol, metoxyphenol mixing to get additive.
Attapulgite modified preparation: 17:1 in mass ratio takes attapulgite, isocyanates mixing, with 600r/min magnetic force
40min is stirred, the silane coupling agent KH-560 of attapulgite quality 8% is added, 3h is ground with 450r/min, crosses 200 meshes, is received
Fulvic acid, salt material, auxiliary agent mixing is added in collection sieving particle 10:3:1:2 in mass ratio, after freezing with liquid nitrogen spraying, must freeze material,
It takes freezing material 12:1 in mass ratio that ball-milling medium mixing is added, the mixing of zirconium oxide ball milling pearl is added by ball material mass ratio 25:1, with
500r/min ball milling 2h is to get attapulgite modified.
The preparation method of composite base-material, includes the following steps:
(1) 7:2 in mass ratio takes basalt, muscovite to crush in pulverizer, crosses 200 meshes, collects sieving particle and presses matter
Amount is added reagent A than 1:9 and is mixed, and is stored at room temperature 2h, filters, takes filter cake in 70 DEG C of oven dryings, obtain dry cake, by weight
Number meter is measured, 25 parts of dry cakes, 12 parts of polyallylamines, 13 parts of urea, 50 parts of reagent B, 5 parts of emulsifiers is successively taken, first takes poly-
Allylamine, urea, reagent B are mixed in reaction kettle, stir 30min with 400r/min, add emulsifier, dry cake mixing,
Dispersion 35min is sheared with 3500r/min, obtains pretreatment building stones；
(2) according to parts by weight, successively take 15 parts of goose feather, 4 parts of lactobacillus bulgaricus, 50 parts of sterile waters, 4 portions of sucrose in
Fermentor, with 300r/min shaking table oscillation and fermentation 5 days, obtains fermentation material in 30 DEG C, takes fermentation material in high temperature pot, keeps the temperature in 121 DEG C
Sterilize 19min, obtains sterilization fermentation material, takes sterilization fermentation material to filter, obtains filtrate, takes filtrate in Rotary Evaporators, in 68 DEG C of temperature,
Under the conditions of pressure 700kPa, the 40% of concentrated by rotary evaporation to original volume, concentrate feed is obtained, takes concentrate feed 3:7:1 to be in mass ratio added pre-
Building stones, additive mixing are handled, with 800r/min magnetic agitation 45min to get composite base-material.
A kind of cadmium pollution soil renovation agent, according to the mass fraction, including following component: 8 parts of thiocarbamides, 5 parts of vulcanized sodium, 7 parts
Humic acid, 4 parts of sodium silicates, 12 parts of attapulgite modified, 30 parts of composite base-materials.
A kind of preparation method of cadmium pollution soil renovation agent, includes the following steps:
(1) according to the mass fraction, 8 parts of thiocarbamides, 5 parts of vulcanized sodium, 7 parts of humic acid, 4 parts of sodium silicates, 13 parts of modified bumps are taken
Stick soil, 35 parts of composite base-materials；
(2) prior to 40 DEG C, thiocarbamide, vulcanized sodium, composite base-material is taken to mix in batch mixer, with 500r/min magnetic agitation
50min, then 55 DEG C are warming up to, humic acid, sodium silicate, attapulgite modified mixing is added, with 800r/min magnetic agitation 2h, i.e.,
Obtain cadmium pollution soil renovation agent.
Comparative example 1: it is essentially identical with the preparation method of embodiment 1, it has only the difference is that lacking attapulgite modified.
Comparative example 2: it is essentially identical with the preparation method of embodiment 1, it has only the difference is that lacking composite base-material.
Comparative example 3: the cadmium pollution soil renovation agent of company of Heilungkiang city production.
The cadmium pollution soil renovation agent that above-described embodiment is obtained with comparative example is detected, soil-repairing agent is uniformly mixed
The surface for being sprinkling upon heavy metal cadmium soil is closed, is per acre 150kg, then carrying out Soil tillage makes soil-repairing agent and cadmium pollution
Soil is sufficiently mixed uniformly, balances 7 days completion heavy metal-polluted soil repair processes.Soil after reparation is tested, concentration list
Position is ug/L, obtains that the results are shown in Table 1.
Table 1:
In summary, cadmium pollution soil renovation agent effect of the invention is more preferable as can be seen from Table 1, is worth of widely use,
The foregoing is merely preferred modes of the invention, are not intended to limit the invention, all within the spirits and principles of the present invention, institute
Any modification, equivalent substitution, improvement and etc. of work, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of cadmium pollution soil renovation agent, according to the mass fraction, including following component: 6~10 parts of thiocarbamides, 3~7 parts of vulcanizations
Sodium, 5~8 parts of humic acid, 3~7 parts of sodium silicates, which is characterized in that further include: 10~15 parts it is attapulgite modified, 25~40 parts
Composite base-material.
2. a kind of cadmium pollution soil renovation agent according to claim 1, which is characterized in that the attapulgite modified system
Standby: 12~20:1 in mass ratio takes attapulgite, isocyanates to be mixed, and the silane of attapulgite quality 6~10% is added
Coupling agent KH-560 is ground, sieving, and it is mixed to collect sieving particle 7~12:3:1:2 in mass ratio addition fulvic acid, salt material, auxiliary agent
It closes, liquid nitrogen spraying must freeze material, take freezing material 8~15:1 in mass ratio that ball-milling medium is added, by 20~30:1 of ball material mass ratio
The mixing of zirconium oxide ball milling pearl is added, ball milling is to get attapulgite modified.
3. a kind of cadmium pollution soil renovation agent according to claim 2, which is characterized in that the salt material: 5:1 in mass ratio~
3 take zinc sulfate, zinc chloride mixing to get salt material.
4. a kind of cadmium pollution soil renovation agent according to claim 2, which is characterized in that the auxiliary agent: in mass ratio 5~8:
2 take hydroxyapatite, vermiculite to pulverize and sieve, and collect sieving particle to get auxiliary agent.
5. a kind of cadmium pollution soil renovation agent according to claim 2, which is characterized in that the ball-milling medium: by volume 4
~8:1 takes acetone, glycerol mixing to get ball-milling medium.
6. a kind of cadmium pollution soil renovation agent according to claim 1, which is characterized in that the preparation side of the composite base-material
Method includes the following steps:
(1) 5~8:2 in mass ratio takes basalt, muscovite to pulverize and sieve, and collects sieving particle 1:7 in mass ratio~10 and is added
Reagent A is mixed, and is stored at room temperature, and filters, takes filtration cakes torrefaction, obtain dry cake, according to parts by weight, successively take 20~30 parts
Dry cake, 10~15 parts of polyallylamines, 12~20 parts of urea, 40~60 parts of reagent B, 3~6 parts of emulsifiers, first take polyene third
Amine, urea, reagent B are mixed, and emulsifier, dry cake mixing is added, and shearing dispersion obtains pretreatment building stones；
(2) according to parts by weight, 14~25 parts of goose feather, 3~7 parts of lactobacillus bulgaricus, 40~55 parts of sterile waters, 3 are successively taken
~5 portions of sucrose, in 28~35 DEG C, shaking table oscillation and fermentation obtains fermentation material, fermentation material is taken to sterilize, and obtains sterilization fermentation material, and sterilizing is taken to send out
The filtering of ferment material, obtains filtrate, takes filtrate concentrated by rotary evaporation, obtain concentrate feed, takes concentrate feed 2~4:7:1 in mass ratio that pretreatment stone is added
Material, additive are mixed to get composite base-material.
7. a kind of cadmium pollution soil renovation agent according to claim 6, which is characterized in that the reagent A in the step (1):
6~10:1 in mass ratio takes sodium carbonate liquor, sodium citrate mixing to get reagent A.
8. a kind of cadmium pollution soil renovation agent according to claim 6, which is characterized in that the reagent B in the step (1):
12~20:1 in mass ratio takes ethanol solution, polyvinylpyrrolidone mixing to get reagent B.
9. a kind of cadmium pollution soil renovation agent according to claim 6, which is characterized in that the emulsifier in the step (1):
7~12:2 in mass ratio takes polyacrylamide, soybean lecithin mixing to get emulsifier.
10. a kind of cadmium pollution soil renovation agent according to claim 6, which is characterized in that the addition in the step (2)
Agent: 3~6:1 in mass ratio takes methylphenol, metoxyphenol mixing to get additive.
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