CN110283599A - A kind of heavy-metal contaminated soil renovation agent and preparation method thereof - Google Patents

A kind of heavy-metal contaminated soil renovation agent and preparation method thereof Download PDF

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CN110283599A
CN110283599A CN201910615997.4A CN201910615997A CN110283599A CN 110283599 A CN110283599 A CN 110283599A CN 201910615997 A CN201910615997 A CN 201910615997A CN 110283599 A CN110283599 A CN 110283599A
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heavy
contaminated soil
metal contaminated
renovation agent
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CN110283599B (en
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张珂
厉萌萌
马闯
魏明宝
赵建国
宋亚丽
张宏忠
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Zhengzhou University of Light Industry
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00Soil-conditioning materials or soil-stabilising materials
    • C09K17/40Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09K2101/00Agricultural use
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Fertilizers (AREA)

Abstract

The present invention provides a kind of heavy-metal contaminated soil renovation agents, are made of the raw material of following mass parts: 50~65 parts of modified biomass charcoal, 20~30 parts of organic matter, 6~15 parts of complex micro organism fungicide, 5~10 parts of polyacrylamide, 12~20 parts of organic fertilizer, 6~12 parts of iron powder;Wherein modified biomass charcoal by biomass carbon with vulcanized sodium is mixed and modified obtains;Wherein organic matter is mixed to get by humic acid, potassium humate, potassium fulvate according to 2~4:6~8:3 mass ratio.The present invention also protects the preparation method of heavy-metal contaminated soil renovation agent.Heavy-metal contaminated soil renovation agent preparation process of the invention is simple, mild condition, and heavy metal in soil removal rate is high after reparation, with higher realistic meaning good to the repairing effect of soil.

Description

A kind of heavy-metal contaminated soil renovation agent and preparation method thereof
Technical field
The present invention relates to soil pollution renovation agent, specially a kind of heavy-metal contaminated soil renovation agent.
Background technique
Soil is the important component of human environment, is indispensable, non-renewable natural resources, is all living things The important foundation depended on for existence is the important place of terrestrial ecosystem substance, energy exchange and circulation.With China's industry Change, the fast development of urbanization, massive discharge of pollutant, the use of unqualified agricultural substance, the unreasonable of mineral resources open Adopt so that heavy metal constantly enters in soil environment, when it is accumulated over it is a certain amount of after will result in the pollution of soil, from And the problem of environmental pollution of soil is made to be on the rise, especially heavy metal pollution of soil problem.Heavy metal pollution of soil has hidden Covering property, chronicity and irreversibility, the residence time of pollutant in the soil is long, and plant or microorganism are difficult to degrade, and not only may be used To cause degeneration, the crops of soil impaired, the life and health of the mankind can be also directly threatened.In recent years, while as environment is disliked The exacerbation of change, the heavy metal pollution problem of soil also present increasingly complicated trend.A large amount of pollution plot there is While heavy metal pollution, there is also the pollution of serious toxic organic compound, resident and ecological environment to surrounding are brought sternly The threat of weight.
Currently, the recovery technique for heavy-metal contaminated soil mainly has: soil replacement method, original position or ex-situ chemical washing, heat Desorption method, vitrifying reparation etc., wherein soil replacement method, implementation project amount is big, and investment cost is high, destroys soil structures, and right The dirt soil to swap out is dealt carefully with again can just prevent secondary pollution, therefore, be not suitable for the improvement of pollution in wide area soil;It is in situ Or ex-situ chemical washing, this method have it is with high costs, and for washed off soil reagent enter soil after will cause secondary dirt Dye;Thermal desorption method, being only used for processing has volatile heavy metal, such as mercury, and needs to consume in treatment process a large amount of Energy, economic cost are higher;Vitrifying reparation, this method remediation efficiency is high, but the soil after reparation needs landfill disposal, repairs Soil after at high cost and reparation can not be agricultural again.
The above-mentioned restorative procedure to by heavy-metal contaminated soil, some completely cannot thoroughly eliminate the huge sum of money in soil Belong to, some even bring new pollutant, there are various defects, therefore, for above-mentioned status, design one kind and remove removing heavy metals Effect is good and not generate new contaminated soil renovation agent very necessary.
Summary of the invention
The purpose of the present invention is to solve the deficiencies of above-mentioned technology, provide a kind of heavy-metal contaminated soil renovation agent, will Modified biomass charcoal is used in combination with organic matter, complex micro organism fungicide, can either adsorb the heavy metal in fixing soil, and energy Enough improve soil texture, and repair process does not generate new pollutant, repairing effect is good.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of heavy-metal contaminated soil renovation agent, is made of the raw material of following mass parts:
50~65 parts of modified biomass charcoal, 20~30 parts of organic matter, 6~15 parts of complex micro organism fungicide, polyacrylamide 5 ~10 parts, 12~20 parts of organic fertilizer, 6~12 parts of iron powder;
The modified biomass charcoal by biomass carbon with vulcanized sodium is mixed and modified obtains;
The organic matter is mixed to get by humic acid, potassium humate, potassium fulvate according to 2~4:6~8:3 mass ratio;
The complex micro organism fungicide is made of the raw material of following mass parts: 1~4 part of bacillus cereus, perfringens 1~3 part of clostridium, 1~5 part of bacillus mycoides, 2~3 parts of colloid bacillus cereus, 5~12 parts of white-rot fungi, citric acid bacillus 2 ~5 parts, 3~5 parts of oyster ash streptomycete, 1~4 part of pseudomonas aeruginosa.
Preferably, the living bacteria count of each bacterium is 1 × 10 in the complex micro organism fungicide9~3 × 109CFU/g。
Preferably, the ripe fertilizer after the organic fertilizer is house refuse, rubbish from cooking mixing feces of livestock and poultry is fermented.
The present invention also protects the preparation method of above-mentioned heavy-metal contaminated soil renovation agent, comprising the following steps:
Step 1: biomass carbon is impregnated 35~40h in sodium sulfide solution, it is washed with water, filtered and dried, and in indifferent gas In 500~600 DEG C of 1~3h of calcining in body atmosphere, 1~2h is kept the temperature, modified biomass charcoal is obtained, it is spare;
Humic acid, potassium humate, potassium fulvate are mixed to get organic matter according to 2~4:6~8:3 mass ratio, it is spare;
In terms of mass fraction, by 1~4 part of bacillus cereus, 1~3 part of C.perfringens, bacillus mycoides 1~5 Part, 2~3 parts of colloid bacillus cereus, 5~12 parts of white-rot fungi, 2~5 parts of citric acid bacillus, 3~5 parts of oyster ash streptomycete, verdigris 1~4 part of Pseudomonas alba mixing, obtains complex micro organism fungicide;
Step 2: weighing 60~65 parts of modified biomass charcoal that step 1 obtains, the organic matter 20~30 that step 1 obtains Part, 6~15 parts of complex micro organism fungicide, 5~10 parts of polyacrylamide, 12~20 parts of organic fertilizer, 6~12 parts of iron powder are spare;
Step 3: the weighed complex micro organism fungicide of step 2 and water are mixed to get according to the volume ratio of 1:170~190 Complex microorganism bacterium solution, and be uniformly mixed with the weighed modified biomass charcoal of step 2, ultrasound is dry, obtains mixture;
Step 4: the mixing that the weighed organic matter of step 2, polyacrylamide, organic fertilizer, iron powder and step 3 are obtained Object is uniformly mixed, and obtains heavy-metal contaminated soil renovation agent.
Preferably, in step 1, the mass fraction of sodium sulfide solution is 10~30%.
Preferably, in step 1, the preparation process of biomass carbon are as follows: by biomass material and calcium oxide according to 20~22:1 Mass ratio mixing in 600~800 DEG C of 1~3h of pyrolysis, cool down and obtain biomass carbon and in atmosphere of inert gases.
Preferably, biomass material is agricultural crop straw, peanut shell, deseeding sunflower plate, willow leaf, rice husk, animal wastes With one of sawdust or a variety of.
Preferably, in step 3, the dry condition of ultrasound are as follows: ultrasonic power is 100~200W, supersonic frequency 20kHz.
Compared with prior art, beneficial effects of the present invention are as follows:
1, biomass carbon of the invention is obtained by pyrolysis biomass in inert atmosphere, under an inert atmosphere biology obtained Matter charcoal porosity is high, and absorption property is good, and addition calcium oxide can effectively facilitate biomass carbon in biomass carbon preparation process Yield increase, duct it is abundant, while can also soil pH value be made to improve, so that soil surface negative electrical charge be made to increase, make soil The compatibility of heavy metal is increased, heavy metal in soil can also be promoted to form hydroxide or reference state precipitating or co-precipitation;And And the present invention has carried out sulphur modification to biomass carbon, significantly increases biomass carbon surface sulfur-bearing functional group quantity, enhances pair The adsorption capacity of heavy metal, and sulfur-bearing functional group can promote the reduction of sexavalence cadmium, and stability is high, will not generate secondary dirt Dye;
2, the present invention makes full use of resource using biomass such as agricultural crop straws as raw material, avoids environment caused by burning because of it Pollution, and modified biomass charcoal is used in combination with organic fertilizer, having improves soil physico-chemical property, adjusts soil pH and raising The effect of soil fertility so that renovation agent has not only repaired heavy metal, but also improves the property of soil;
3, the present invention can adsorb simultaneously curing heavy metal by the way that modified biomass charcoal to be used in combination with organic matter;With much money Belong to substance to exist in the soil with variform, such as cadmium includes soluble cadmium ionic forms, insoluble sulfur cadmium and cadmium salt;This It include humic acid, potassium humate and potassium fulvate in invention organic matter, potassium humate can make soluble cadmium ion form hydrogen Cadmium oxide is passivated in the soil, while discharging potash fertilizer, and humic acid can adsorb insoluble cadmium sulfide and cadmium salt, at this time modified life Substance charcoal can adsorb the cadmium hydroxide in soil;Humic acid itself has Plant-stimulating activity, potassium fulvate tool simultaneously Have improvement soil texture, chesson is increase soil fertility, fixed nitrogen, activation potassium and fortification of plants root system adhesive force and quickly The effect of absorbability;
4, the present invention can effectively absorb the heavy metals such as cadmium, lead, zinc by the way that complex micro organism fungicide is added;Iron powder can The substances such as cadmium, chromium are reduced to low toxicity or nonpoisonous state;Polyacrylamide is high molecular polymer, there is good water solubility, nothing Physical property that is malicious, non-corrosive, can improving soil increases soil macro aggregate number, improves soil hydraulic and aqueous Amount, slows down soil losses, soil can be allowed to come into full contact with passivator;In addition, polyacrylamide has carboxyl and amide groups etc. living Property group, can have the synergistic effect of stable chromium ion by forming coordinate bond with the metal ion on soil particle surface.
Specific embodiment
Below by specific embodiment example, the present invention will be described in detail.The scope of the present invention is not limited to the tool Body embodiment.
Embodiment 1
The present embodiment provides a kind of heavy-metal contaminated soil renovation agents, are made of the raw material of following mass parts:
57 parts of modified biomass charcoal, 25 parts of organic matter, 10 parts of complex micro organism fungicide, 7 parts of polyacrylamide, organic fertilizer 16 Part, 9 parts of iron powder;
Wherein organic matter is mixed to get by humic acid, potassium humate, potassium fulvate according to the mass ratio of 3:7:3;
Wherein complex micro organism fungicide is made of the raw material of following mass parts: 2.5 parts of bacillus cereus, perfringens shuttle 2 parts of bacterium, 3 parts of bacillus mycoides, 2.5 parts of colloid bacillus cereus, 8.5 parts of white-rot fungi, 3.5 parts of citric acid bacillus, oyster ash chain 4 parts of mould, 2.5 parts of pseudomonas aeruginosa;The living bacteria count of each bacterium is 1 × 10 in complex micro organism fungicide9CFU/ g。
The present embodiment also provides the preparation method of above-mentioned renovation agent, comprising the following steps:
Step 1: agricultural crop straw is mixed with calcium oxide according to the mass ratio of 20:1, and under protection of argon gas in 700 DEG C It is pyrolyzed 2h, cooling obtains biomass carbon;Biomass carbon is impregnated into 37.5h, water in the sodium sulfide solution that mass fraction is 20% It washes, filters, it is dry, and keep the temperature 1h in 550 DEG C of calcining 2h in argon atmosphere, obtain modified biomass charcoal, it is spare;
Humic acid, potassium humate, potassium fulvate are mixed to get organic matter according to the mass ratio of 3:7:3, it is spare;
Step 2: weigh 57 parts of modified biomass charcoal that step 1 obtains, obtain 25 parts of organic matter of step 1 are compound micro- It is 10 parts of bacteria agent, 7 parts of polyacrylamide, 16 parts of organic fertilizer, 9 parts of iron powder, spare;
Step 3: the weighed complex micro organism fungicide of step 2 and water are mixed to get according to the volume ratio of 1:180 compound Microbial inoculum, and be uniformly mixed with the weighed modified biomass charcoal of step 2, ultrasound is dry, obtains mixture;
Step 4: the mixing that the weighed organic matter of step 2, polyacrylamide, organic fertilizer, iron powder and step 3 are obtained Object is uniformly mixed, and obtains heavy-metal contaminated soil renovation agent.
Embodiment 2
The present embodiment provides a kind of heavy-metal contaminated soil renovation agents, are made of the raw material of following mass parts:
50 parts of modified biomass charcoal, 20 parts of organic matter, 6 parts of complex micro organism fungicide, 5 parts of polyacrylamide, organic fertilizer 12 Part, 6 parts of iron powder;
Wherein organic matter is mixed to get by humic acid, potassium humate, potassium fulvate according to the mass ratio of 2:6:3;
Wherein complex micro organism fungicide is made of the raw material of following mass parts: 1 part of bacillus cereus, C.perfringens 1 part, 1 part of bacillus mycoides, 2 parts of colloid bacillus cereus, 5 parts of white-rot fungi, 2 parts of citric acid bacillus, 3 parts of oyster ash streptomycete, 1 part of pseudomonas aeruginosa;The living bacteria count of each bacterium is 2 × 10 in complex micro organism fungicide9CFU/g。
The present embodiment also provides the preparation method of above-mentioned renovation agent, comprising the following steps:
Step 1: agricultural crop straw is mixed with calcium oxide according to the mass ratio of 22:1, and under protection of argon gas in 600 DEG C It is pyrolyzed 3h, cooling obtains biomass carbon;Biomass carbon is impregnated into 40h in the sodium sulfide solution that mass fraction is 10%, is washed, Filtering, it is dry, and keep the temperature 2h in 500 DEG C of calcining 3h in argon atmosphere, obtain modified biomass charcoal, it is spare;
Humic acid, potassium humate, potassium fulvate are mixed to get organic matter according to the mass ratio of 2:6:3, it is spare;
Step 2: weigh 50 parts of modified biomass charcoal that step 1 obtains, obtain 20 parts of organic matter of step 1 are compound micro- It is 6 parts of bacteria agent, 5 parts of polyacrylamide, 12 parts of organic fertilizer, 6 parts of iron powder, spare;
Step 3: the weighed complex micro organism fungicide of step 2 and water are mixed to get according to the volume ratio of 1:170 compound Microbial inoculum, and be uniformly mixed with the weighed modified biomass charcoal of step 2, ultrasound is dry, obtains mixture;
Step 4: the mixing that the weighed organic matter of step 2, polyacrylamide, organic fertilizer, iron powder and step 3 are obtained Object is uniformly mixed, and obtains heavy-metal contaminated soil renovation agent.
Embodiment 3
The present embodiment provides a kind of heavy-metal contaminated soil renovation agents, are made of the raw material of following mass parts:
65 parts of modified biomass charcoal, 30 parts of organic matter, 15 parts of complex micro organism fungicide, 10 parts of polyacrylamide, organic fertilizer 20 parts, 12 parts of iron powder;
Wherein organic matter is mixed to get by humic acid, potassium humate, potassium fulvate according to the mass ratio of 4:8:3;
Wherein complex micro organism fungicide is made of the raw material of following mass parts: 4 parts of bacillus cereus, C.perfringens 3 parts, 5 parts of bacillus mycoides, 3 parts of colloid bacillus cereus, 12 parts of white-rot fungi, 5 parts of citric acid bacillus, 5 parts of oyster ash streptomycete, 4 parts of pseudomonas aeruginosa;The living bacteria count of each bacterium is 3 × 10 in complex micro organism fungicide9CFU/g。
The present embodiment also provides the preparation method of above-mentioned renovation agent, comprising the following steps:
Step 1: agricultural crop straw is mixed with calcium oxide according to the mass ratio of 22:1, and under protection of argon gas in 800 DEG C It is pyrolyzed 1h, cooling obtains biomass carbon;Biomass carbon is impregnated into 35h in the sodium sulfide solution that mass fraction is 30%, is washed, Filtering, it is dry, and keep the temperature 2h in 600 DEG C of calcining 1h in argon atmosphere, obtain modified biomass charcoal, it is spare;
Humic acid, potassium humate, potassium fulvate are mixed to get organic matter according to the mass ratio of 4:8:3, it is spare;
Step 2: weigh 65 parts of modified biomass charcoal that step 1 obtains, obtain 30 parts of organic matter of step 1 are compound micro- It is 15 parts of bacteria agent, 10 parts of polyacrylamide, 20 parts of organic fertilizer, 12 parts of iron powder, spare;
Step 3: the weighed complex micro organism fungicide of step 2 and water are mixed to get according to the volume ratio of 1:190 compound Microbial inoculum, and be uniformly mixed with the weighed modified biomass charcoal of step 2, ultrasound is dry, obtains mixture;
Step 4: the mixing that the weighed organic matter of step 2, polyacrylamide, organic fertilizer, iron powder and step 3 are obtained Object is uniformly mixed, and obtains heavy-metal contaminated soil renovation agent.
Comparative example 1
It is identical as the composition of embodiment 1 and preparation method, the difference is that being added without complex micro organism fungicide.
Comparative example 2
It is identical as the composition of embodiment 1 and preparation method, the difference is that is be added is biomass carbon, that is, biomass carbon Without modification.
Comparative example 3
The biomass carbon of embodiment 1.
Comparative example 4
The modified biomass charcoal of embodiment 1.
The renovation agent of 1~embodiment of the embodiment of the present invention 3 has good repairing effect, we are by embodiment 1~reality The sample of the sample, 1~comparative example of comparative example 4 of applying example 3 has carried out reparative experiment.
We conducted the reparative experiments to heavy-metal contaminated soil first, first set the soil of heavy metal pollution respectively In in 7 identical containers, then apply 1~embodiment of embodiment 3 and comparative example respectively according to the quality of soil weight 5% Deionized water is added after being sufficiently mixed in the sample of 1~comparative example 4, makes soil moisture 30~40%, then adds water to make reality daily The humidity for testing soil is constant, and pedotheque is acquired after 30d, carries out content of beary metal test.Table 1 is soil after different samples are repaired The content of beary metal tables of data of sample.
The content of beary metal tables of data of pedotheque after the different samples of table 1 are repaired
As it can be seen from table 1 heavy metal soil-repairing agent of the invention for heavy metal pollution soil have it is good Repairing effect.
Influence experiment of the soil to growing plant, detailed process after we are repaired simultaneously are as follows: take sieving fine earth system The standby cadmium pollution soil at 400mg/kg, after being sufficiently mixed, is fitted into flowerpot, and every basin fills soil 500g, and deionized water, which is added, to be made to contain Water is the 30% of field capacity, and balance applied 1~embodiment of embodiment 3 and comparative example 1~comparison after one month respectively The soil-repairing agent of example 4.Then complete, health, full wheat seed are chosen, every basin sows 30, depth of planting 2cm.By 7 A flowerpot is cultivated in intelligent artificial climate vegetation box, and day temperature is 25 ± 2 DEG C, full exposure, and evening temperature is 18 ± 2 DEG C, Dark, whole day humidity are 60~70%, pour a water every two days.Thinning after a week is grown, every basin stays 15 plants of seedling.After growth 30 days Plant and root soil sample are acquired, the content of heavy metal cadmium in plant and root soil is measured, the results are shown in Table 2.
The cadmium content of soil plantation wheat after table 2 is repaired
From table 2 it can be seen that renovation agent of the invention influences significantly cadmium available state in soil, renovation agent of the present invention can The intracorporal cadmium content of wheat is effectively reduced.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (8)

1. a kind of heavy-metal contaminated soil renovation agent, which is characterized in that be made of the raw material of following mass parts:
50~65 parts of modified biomass charcoal, 20~30 parts of organic matter, 6~15 parts of complex micro organism fungicide, polyacrylamide 5~10 Part, 12~20 parts of organic fertilizer, 6~12 parts of iron powder;
The modified biomass charcoal by biomass carbon with vulcanized sodium is mixed and modified obtains;
The organic matter is mixed to get by humic acid, potassium humate, potassium fulvate according to 2~4:6~8:3 mass ratio;
The complex micro organism fungicide is made of the raw material of following mass parts: 1~4 part of bacillus cereus, C.perfringens 1 ~3 parts, 1~5 part of bacillus mycoides, 2~3 parts of colloid bacillus cereus, 5~12 parts of white-rot fungi, 2~5 parts of citric acid bacillus, 3~5 parts of oyster ash streptomycete, 1~4 part of pseudomonas aeruginosa.
2. a kind of heavy-metal contaminated soil renovation agent according to claim 1, which is characterized in that the composite microbial bacteria The living bacteria count of each bacterium is 1 × 10 in agent9~3 × 109CFU/g。
3. a kind of heavy-metal contaminated soil renovation agent according to claim 1, which is characterized in that the organic fertilizer is life Ripe fertilizer after rubbish, rubbish from cooking mixing feces of livestock and poultry are fermented.
4. a kind of preparation method of described in any item heavy-metal contaminated soil renovation agents, feature exist according to claim 1~3 In, comprising the following steps:
Step 1: biomass carbon is impregnated 35~40h in sodium sulfide solution, it is washed with water, filtered and dried, and in inert gas atmosphere In 500~600 DEG C of 1~3h of calcining in enclosing, 1~2h is kept the temperature, modified biomass charcoal is obtained, it is spare;
Humic acid, potassium humate, potassium fulvate are mixed to get organic matter according to 2~4:6~8:3 mass ratio, it is spare;
In terms of mass fraction, by 1~4 part of bacillus cereus, 1~3 part of C.perfringens, 1~5 part of bacillus mycoides, 2~3 parts of colloid bacillus cereus, 5~12 parts of white-rot fungi, 2~5 parts of citric acid bacillus, 3~5 parts of oyster ash streptomycete, the false list of verdigris 1~4 part of born of the same parents bacillus mixing, obtains complex micro organism fungicide;
Step 2: weigh 60~65 parts of modified biomass charcoal that step 1 obtains, obtain 20~30 parts of organic matter of step 1, step Rapid one 6~15 parts of obtained complex micro organism fungicide, 5~10 parts of polyacrylamide, 12~20 parts of organic fertilizer, 6~12 parts of iron powder, It is spare;
Step 3: the weighed complex micro organism fungicide of step 2 and water are mixed to get according to the volume ratio of 1:170~190 compound Microbial inoculum, and be uniformly mixed with the weighed modified biomass charcoal of step 2, ultrasound is dry, obtains mixture;
Step 4: the mixture that the weighed organic matter of step 2, polyacrylamide, organic fertilizer, iron powder and step 3 obtain is mixed It closes uniformly, obtains heavy-metal contaminated soil renovation agent.
5. a kind of preparation method of heavy-metal contaminated soil renovation agent according to claim 4, which is characterized in that the step In rapid one, the mass fraction of sodium sulfide solution is 10~30%.
6. a kind of preparation method of heavy-metal contaminated soil renovation agent according to claim 4, which is characterized in that the life The preparation process of substance charcoal are as follows: mix biomass material according to the mass ratio of 20~22:1 with calcium oxide, and in inert gas In atmosphere, in 600~800 DEG C of 1~3h of pyrolysis, cooling obtains biomass carbon.
7. a kind of preparation method of heavy-metal contaminated soil renovation agent according to claim 6, which is characterized in that the life Raw material of substance is one of agricultural crop straw, peanut shell, deseeding sunflower plate, willow leaf, rice husk, animal wastes and sawdust or more Kind.
8. a kind of preparation method of heavy-metal contaminated soil renovation agent according to claim 4, which is characterized in that the step In rapid three, the dry condition of ultrasound are as follows: ultrasonic power is 100~200W, supersonic frequency 20kHz.
CN201910615997.4A 2019-07-09 2019-07-09 Heavy metal contaminated soil remediation agent and preparation method thereof Expired - Fee Related CN110283599B (en)

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CN115318826B (en) * 2022-06-23 2023-07-21 北京晋荣农业科技有限公司 Conditioner for purifying heavy metal contaminated soil and preparation method and application thereof
CN115488143A (en) * 2022-08-03 2022-12-20 中科广化(重庆)新材料研究院有限公司 Method for restoring polluted soil by using kitchen garbage
CN117229105A (en) * 2022-12-29 2023-12-15 青岛市农业科学研究院 Compound biological fertilizer for improving yield of peppers and preparation method thereof
CN116286018A (en) * 2023-05-25 2023-06-23 地康食安(北京)农业科技有限公司 Soil conditioner based on biomass charcoal and preparation method and application thereof
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