CN115228925A - Stabilizer for repairing soil heavy metal combined pollution and preparation and application thereof - Google Patents
Stabilizer for repairing soil heavy metal combined pollution and preparation and application thereof Download PDFInfo
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- CN115228925A CN115228925A CN202210881330.0A CN202210881330A CN115228925A CN 115228925 A CN115228925 A CN 115228925A CN 202210881330 A CN202210881330 A CN 202210881330A CN 115228925 A CN115228925 A CN 115228925A
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- 239000002689 soil Substances 0.000 title claims abstract description 85
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 76
- 239000003381 stabilizer Substances 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000010452 phosphate Substances 0.000 claims abstract description 33
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 32
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 32
- 244000005700 microbiome Species 0.000 claims abstract description 30
- 239000002367 phosphate rock Substances 0.000 claims abstract description 30
- 230000003381 solubilizing effect Effects 0.000 claims abstract description 30
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 17
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 17
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 17
- 239000011651 chromium Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000010802 sludge Substances 0.000 claims abstract description 12
- 238000005067 remediation Methods 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 239000003415 peat Substances 0.000 claims description 23
- 235000014469 Bacillus subtilis Nutrition 0.000 claims description 12
- 244000063299 Bacillus subtilis Species 0.000 claims description 10
- 230000006641 stabilisation Effects 0.000 claims description 8
- 238000011105 stabilization Methods 0.000 claims description 8
- 241000194103 Bacillus pumilus Species 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 241000193830 Bacillus <bacterium> Species 0.000 claims description 4
- 241000194107 Bacillus megaterium Species 0.000 claims description 3
- 239000002905 metal composite material Substances 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 claims description 2
- 229940077441 fluorapatite Drugs 0.000 claims description 2
- 229910052587 fluorapatite Inorganic materials 0.000 claims description 2
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 claims description 2
- 239000003814 drug Substances 0.000 abstract description 8
- 239000003583 soil stabilizing agent Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 3
- 238000003900 soil pollution Methods 0.000 abstract description 3
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 239000003337 fertilizer Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 17
- 150000002500 ions Chemical class 0.000 description 11
- 238000001179 sorption measurement Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000002068 microbial inoculum Substances 0.000 description 4
- 241000282414 Homo sapiens Species 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 235000011010 calcium phosphates Nutrition 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 210000000170 cell membrane Anatomy 0.000 description 2
- 210000003850 cellular structure Anatomy 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910000155 iron(II) phosphate Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 238000000918 plasma mass spectrometry Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002688 soil aggregate Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mycology (AREA)
- Biotechnology (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Botany (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a stabilizer for remedying soil heavy metal combined pollution and preparation and application thereof. The raw material components are as follows by mass percent: 52-60% of red mud, 30-35% of ground phosphate rock, 2-4% of sludge carbon, 5-8% of ferrous oxide and 1-2% of phosphate solubilizing microorganisms. The stabilizer is simple in steps when applied to contaminated soil remediation, the cost of the contained medicament components is low, no secondary pollution is caused, the practicability is strong, the stabilizing effect of the soil stabilizer is remarkable, the using efficiency is high, and the stabilizing time is long. After the fertilizer is applied to the polluted soil, the pollution of heavy metals such as cadmium, lead, arsenic and chromium can be obviously reduced, and the stability of the cadmium, lead, arsenic and chromium in the soil can be ensured for a long time. Meanwhile, the utilization efficiency of the soil can be improved, the physical and chemical properties of the soil can be improved, and a new high-efficiency method is provided for the treatment of the soil pollution of the composite pollution containing cadmium, lead, arsenic and chromium.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a stabilizer for repairing heavy metal composite pollution such as cadmium, lead, arsenic, chromium and the like in soil, and preparation and application thereof.
Background
With the rapid development of industrial and agricultural in China, the problem of heavy metal pollution caused by mining, smelting, pesticide, chemical fertilizer application and other behaviors is becoming more serious, and heavy metals have the characteristics of concealment, difficult degradability, carcinogenicity and the like, can be accumulated in organisms through water, soil, food chains and other ways, influence the safety of agricultural products and further harm human health. The metal mining and smelting activities enable the ore originally buried deeply underground to be exposed on the ground surface, so that heavy metal elements in the ore can be released to the environment, the heavy metal elements in the ore and surrounding rocks enter surface water, underground water, atmosphere and soil in a mining area and peripheral areas in the forms of waste water, waste residues, waste gases and the like, serious heavy metal pollution is caused to local or surrounding ecological systems, the heavy metal elements enter food chains of human beings through an aquatic system, a soil-plant system and the like, the health of the human beings is finally harmed, and the repair work is more complicated and difficult. Therefore, it is important to find a stabilizer with low cost and remarkable effect.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a stabilizer for remedying the heavy metal composite pollution of cadmium, lead, arsenic, chromium and the like in soil and application thereof. The stabilizer is applied to the polluted soil, has simple repairing steps, contains low cost of medicament components, has no secondary pollution, and has strong practicability. And the soil stabilizer has obvious stabilization effect, high use efficiency and long stabilization time, can obviously reduce the pollution of heavy metals such as cadmium, lead, arsenic and chromium after being applied to the polluted soil, and can ensure the stability of the cadmium, lead, arsenic and chromium in the soil for a long time. Meanwhile, the utilization efficiency of the soil can be improved, the physical and chemical properties of the soil can be improved, and a new high-efficiency method is provided for the soil pollution treatment of the composite pollution containing cadmium, lead, arsenic and chromium.
A stabilizer for remedying soil heavy metal combined pollution comprises the following raw material components: red mud, ground phosphate rock, peat, ferrous oxide and phosphate solubilizing microorganisms.
The stabilizer for repairing the soil heavy metal combined pollution comprises the following raw material components in percentage by mass: 52-60% of red mud, 30-35% of ground phosphate rock, 2-4% of sludge carbon, 5-8% of ferrous oxide and 1-2% of phosphate solubilizing microorganisms. Further, the stabilizer for repairing soil heavy metal combined pollution comprises the following raw material components in percentage by mass: 60% of red mud, 30% of ground phosphate rock, 2% of peat, 6% of ferrous oxide and 2% of phosphate solubilizing microorganisms.
The red mud comprises the main components of CaO and Al 2 O 3 -SiO 2 The active components of the main components, namely aluminum and silicon, are the active components, and the red mud has large specific surface area and large surface energy, so that the polluted soil can be efficiently stabilized.
The main component of the phosphate rock powder is fluorapatite Ca 5 (PO4) 3 F, the purity is more than or equal to 60 percent. The ground phosphate rock can adsorb and precipitate partial heavy metal ions, can change the occurrence form and distribution of heavy metals in the soil, can also provide certain nutrition for the soil, and promotes the growth of plants.
The sludge coal is activated sludge, has an adsorption effect on heavy metals, has the best adsorption effect after being treated at the high temperature of 400-800 ℃, and has the lowest energy consumption ratio.
The phosphate solubilizing microorganism comprises: at least one of Bacillus megaterium (B.megatherium), bacillus subtilis (B.Subtilis), bacillus pumilus (B.PUMILIS) and Bacillus pumilus (B.BRE VI) belonging to Bacillus (BACILLUS); the number of organisms is 10 8- 10 10 A gram of microbial inoculum. The phosphate-solubilizing microorganism is a microbial inoculum with a conventional added carrier, and the number of the microorganisms is only required to reach 10 8- 10 10 The microbial inoculum is obtained.
Further preferably, the phosphate solubilizing microorganism is bacillus subtilis (b.subtillis), and as the market price is relatively low, the acquisition route is relatively convenient, and the culture technology is relatively mature.
In the long-term heavy metal stress, the tolerant phosphate solubilizing bacteria can eat a part of heavy metals, combine the heavy metals with the cell components of the tolerant phosphate solubilizing bacteria or combine the heavy metals with proteins to form complex ions to be discharged out of the body, reduce the harmfulness of the complex ions or the extracellular action of cells, combine the complex ions with the rake sites on cell membranes, and passivate the heavy metals. In addition, the phosphate solubilizing microorganisms can decompose insoluble phosphate in soil such as calcium phosphate and the like, and then the physical and chemical properties of heavy metals are changed by phosphate radicals through ion exchange, surface adsorption, coprecipitation and other modes, so that the mobility of the heavy metals is reduced, and the harm of the heavy metals is reduced.
Ferrous oxide has reducibility, so that the toxicity of heavy metals can be reduced, and a complex is formed, so that the mobility of the heavy metals is reduced.
The preparation method of the stabilizer for remedying the soil heavy metal combined pollution comprises the following steps:
the red mud, the ground phosphate rock, the peat, the ferrous oxide and the phosphate solubilizing microorganism are respectively weighed according to the mass percentage and are uniformly mixed to obtain the stabilizer.
The invention also provides application of the stabilizer for repairing the heavy metal combined pollution of the soil, which comprises the steps of uniformly mixing the prepared stabilizer with the heavy metal combined pollution soil to form stable aged soil to obtain repaired soil; preferably, the aging is stable for at least 24 hours.
When the humidity of the stabilized soil does not reach 20-40%, adding water into the stabilized soil for regulation; preferably, the stabilized soil has a moisture content of 30%.
The stabilizer for repairing the heavy metal combined pollution of the soil is applied, wherein the addition amount of the stabilizer is 1.5-3% of the mass of the heavy metal combined pollution soil, and the optimal addition amount is 2%.
The application of the stabilizer for remedying the soil heavy metal combined pollution is specifically used for remedying the soil heavy metal combined pollution; preferably, the heavy metal comprises at least one of cadmium, lead, arsenic and chromium.
The stabilizer prepared by the invention is convenient to apply to the contaminated soil remediation step, the cost of the contained medicament components is low (the price of the remediation type medicament on the market is generally 1500-2000 yuan/ton, the medicament is controlled to be about 1200 yuan/ton, no secondary pollution is caused, the practicability is strong, the stabilization effect of the soil stabilizer is obvious, the use efficiency is high, the time required for stabilization is short (the stabilization time of the general soil stabilizer is more than 48 hours, and the formula of the product only needs 24 hours to achieve the ideal effect) after the stabilizer is applied to the contaminated soil, the pollution of heavy metals such as cadmium, lead, arsenic and chromium can be obviously reduced, the stability of cadmium, lead, arsenic and chromium in the soil can be ensured for a long time, the heavy metals such as cadmium, lead, arsenic and chromium can be prevented from being released again, the utilization efficiency of the soil is improved, the physicochemical property of the soil is improved, and a new high-efficiency method is provided for the soil pollution treatment of the soil containing the composite pollution of cadmium, lead, arsenic and chromium.
The stabilizer has large specific surface area, rich pores and a large number of functional groups, the adsorption of heavy metal pollutants is accelerated by the characteristics of surface adsorption, electrostatic action and complexing action, the heavy metal ions of cadmium, lead, arsenic and chromium can be effectively fixed, and the adopted raw materials such as red mud, ground phosphate rock, sewage peat, ferrous oxide, phosphate solubilizing microorganisms and the like have wide sources, low price, common nature, easy acquisition, simple proportioning, easy culture of the phosphate solubilizing microorganisms, quick reproduction and renewable recycling.
The red mud adopted by the invention is alkaline, has complexation effect on heavy metal ions and also has strong adsorption effect; the peat is rich in porous structures and provides a large specific surface area, so that the number of binding sites of heavy metal ions such as cadmium, lead, arsenic, chromium and the like can be greatly increased, the mobility of the heavy metal ions is reduced, the graphite-like structure can promote electron transfer so as to promote oxidation or reduction of heavy metal pollutants, and meanwhile, a large number of soil aggregates are easily formed in soil after the peat is added, so that the adsorption capacity of the heavy metal ions is improved.
The invention has the beneficial effects that:
(1) Under the comprehensive action of red mud, powdered rock phosphate, peat, ferrous oxide and phosphate solubilizing microorganisms, the invention fixes heavy metal ions in acid soil by chemical precipitation, chelation and adsorption through the comprehensive action of improving the pH value of the soil and the like.
(2) The existing soil remediation agent is too simple in composition and single in functional effect, is a soil remediation agent with comprehensive properties, is diversified in function, and can treat compound pollutants.
(3) The existing soil remediation agent has high production cost and complex manufacturing process, the raw materials of the soil remediation agent are basically natural wastes or industrial wastes, the manufacturing process is simple, and the processing cost is low.
(4) The invention also discovers that when the phosphate solubilizing microorganisms and the sludge carbon are used in a matching manner, the microbial biomass in unit volume is increased rapidly, the activity is more than 5 times of that of the common unit volume, the drug effect of the whole soil stabilizing agent is improved by 2-5 times, the phosphate solubilizing bacteria can eat a part of heavy metal, combine the heavy metal with the cell components of the phosphate solubilizing bacteria or combine the heavy metal with protein to form complex ions which are discharged out of the body, reduce the harmfulness of the phosphate solubilizing bacteria or the extracellular action of cells, combine with rake sites on cell membranes, and passivate the heavy metal. In addition, the phosphate-solubilizing microorganisms can decompose insoluble phosphate in soil such as calcium phosphate, so that the natural effect is better when the amount of the phosphate-solubilizing microorganisms is larger, and the use amount of other stabilizing agents is greatly reduced compared with the use amount of other stabilizing agents under the same condition.
(5) The use amount of ferrous oxide can be greatly reduced by adding the phosphate solubilizing microorganisms to a certain extent, and the inventor learns that the ferrous oxide needs to be continuously added when the phosphate solubilizing microorganisms are not added through experiments because the ferrous oxide is oxidized and fails when the heavy metal is passivated, but the addition of the phosphate solubilizing microorganisms has a reduction effect on the ferrous oxide, so that the ferrous oxide can be recycled, the effect of the medicament can be greatly improved, the use amount of the medicament is reduced, and higher economic benefit is obtained.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the claims of the present invention.
Example 1
100g of stabilizer for repairing soil heavy metal combined pollution is prepared, and the stabilizer comprises the following raw material components in percentage by mass: 55% of red mud, 35% of ground phosphate rock, 3% of sludge carbon, 5% of ferrous oxide and 2% of bacillus subtilis (B.SuBTILIS) (the biological quantity in the microbial inoculum is 10) 10 About/g, the same applies below). The red mud, the ground phosphate rock, the peat, the ferrous oxide and the phosphate solubilizing microorganism are respectively weighed according to the mass percentage and are uniformly mixed to obtain the stabilizer.
Example 2
100g of stabilizer for repairing soil heavy metal combined pollution is prepared, and the stabilizer comprises the following raw material components in percentage by mass: 60% of red mud, 30% of ground phosphate rock, 2% of peat, 6% of ferrous oxide and 2% of bacillus subtilis. The red mud, the ground phosphate rock, the peat, the ferrous oxide and the phosphate solubilizing microorganism are respectively weighed according to the mass percentage and are uniformly mixed to obtain the stabilizer.
Example 3
100g of stabilizer for repairing soil heavy metal combined pollution is prepared, and the stabilizer comprises the following raw material components in percentage by mass: 60% of red mud, 30% of ground phosphate rock, 4% of sludge carbon, 5% of ferrous oxide and 1% of bacillus subtilis. The red mud, the ground phosphate rock, the peat, the ferrous oxide and the phosphate solubilizing microorganism are respectively weighed according to the mass percentage and are uniformly mixed to obtain the stabilizer.
Example 4
100g of stabilizer for repairing soil heavy metal combined pollution is prepared, and the stabilizer comprises the following raw material components in percentage by mass: 60% of red mud, 30% of ground phosphate rock, 3% of sludge carbon, 6% of ferrous oxide and 1% of bacillus subtilis. The red mud, the ground phosphate rock, the peat, the ferrous oxide and the phosphate solubilizing microorganism are respectively weighed according to the mass percentage and are uniformly mixed to obtain the stabilizer.
Comparative example 1
A stabilizer for remedying soil heavy metal combined pollution comprises the following raw material components: powdered rock phosphate; the total amount of the peat is 100g as follows. The red mud, the ground phosphate rock, the peat and the ferrous oxide are respectively weighed according to the proportion and are uniformly mixed to obtain the stabilizer.
Comparative example 2
A stabilizer for remedying soil heavy metal combined pollution comprises the following raw material components: powdered rock phosphate; the total amount of the sludge soil is 100g, namely 6.
The red mud, the ground phosphate rock, the peat, the ferrous oxide and the bacillus subtilis are respectively weighed according to the proportion and are uniformly mixed to obtain the stabilizer.
Comparative example 3
A stabilizer for repairing soil heavy metal combined pollution comprises the following raw material components: powdered rock phosphate; the total amount of the peat is 100g as follows.
The red mud, the ground phosphate rock, the peat, the ferrous oxide and the bacillus subtilis are respectively weighed according to the proportion and are uniformly mixed to obtain the stabilizer.
Comparative example 4
A stabilizer for repairing soil heavy metal combined pollution comprises the following raw material components: ground phosphate rock; the total amount of the sludge soil is 100g, namely 6. The red mud, the ground phosphate rock, the peat and the ferrous oxide are respectively weighed according to the proportion and are uniformly mixed to obtain the stabilizer.
The stabilizer prepared in each group of examples and comparative examples is used for carrying out a soil heavy metal stabilization experiment under the same condition, 5g of soil to be detected is taken in each group and is uniformly mixed with 0.1g of the stabilizer prepared in each group of examples or comparative examples, and the water content of the soil is 30%; the stabilization time is 24h. And respectively determining the contents of As, cd, cr and Pb by adopting an electron coupled plasma mass spectrometry. The blank group was the same weight of soil treated without any added stabilizer.
The results are shown in Table 1:
meanwhile, the following conclusion is obtained by the experiment of the addition amount of the medicament in the best proportioning example 2:
the table shows that the stabilizer prepared by the method can achieve a remarkable stabilizing effect on heavy metals such as cadmium, lead, arsenic and chromium in acid soil, can effectively improve the structure of the soil, can greatly reduce the usage amount of ferrous oxide by adding phosphate solubilizing microorganisms to a certain degree, has similar repairing effect and best repairing effect on the polluted soil, wherein the best formula comprises 60% of red mud, 30% of powdered rock phosphate, 2% of peat, 6% of ferrous oxide and 2% of phosphate solubilizing microorganisms, and the best formula has the best comprehensive effect when the addition amount is 2%.
Claims (10)
1. The stabilizer for repairing the soil heavy metal combined pollution is characterized by comprising the following raw material components in percentage by mass: 52-60% of red mud, 30-35% of ground phosphate rock, 2-4% of sludge carbon, 5-8% of ferrous oxide and 1-2% of phosphate solubilizing microorganisms.
2. The stabilizer for remedying the soil heavy metal combined pollution according to claim 1, wherein the stabilizer comprises the following raw material components in percentage by mass: 60% of red mud, 30% of ground phosphate rock, 2% of peat, 6% of ferrous oxide and 2% of phosphate solubilizing microorganisms.
3. The stabilizer for remedying the soil heavy metal combined pollution according to claim 1 or 2, wherein the red mud mainly comprises CaO and Al 2 O 3 -SiO 2 (ii) a The ground phosphate rock is mainly fluorapatite Ca 5 (PO4) 3 F, the purity is more than or equal to 60 percent.
4. The stabilizer for remedying the soil heavy metal combined pollution according to the claim 1 or 2, wherein the peat is activated peat prepared by subjecting activated sludge to high temperature treatment at 400-800 ℃.
5. The stabilizer for remediating soil heavy metal combined pollution according to claim 1 or 2, wherein the phosphate solubilizing microorganism comprises: at least one of Bacillus megaterium (B.Megatherenium), bacillus subtilis (B.Subtilis), bacillus pumilus (B.pumlis) and Bacillus pumilus (B.BRE VI) of Bacillus (BACILLUS); the number of microorganisms is 10 8 -10 10 And (c) grams.
6. The preparation method of the stabilizer for remedying the soil heavy metal combined pollution is characterized in that the red mud, the ground phosphate rock, the peat, the ferrous oxide and the phosphate solubilizing microorganism are respectively weighed according to the mass percentage and are uniformly mixed to obtain the stabilizer.
7. The application of the stabilizer for remedying the soil heavy metal combined pollution of any one of claims 1 to 6, wherein the prepared stabilizer is uniformly mixed with the heavy metal combined pollution soil to form stable aged soil, so that the remediated soil is obtained; preferably, the stabilization is carried out for at least 24h.
8. The application of the soil remediation heavy metal composite pollution stabilizer of claim 7, wherein when the humidity of the stabilized soil does not reach 20% -40%, water is added into the stabilized soil for regulation; preferably, the stabilized soil has a moisture content of 30%.
9. The application of the stabilizer for remediating soil heavy metal combined pollution according to claim 7, wherein the addition amount of the stabilizer is 1.5-3% of the mass of the heavy metal combined pollution soil.
10. The application of the stabilizer for remediating soil heavy metal combined pollution according to claim 7, which is used for remediating soil heavy metal combined pollution; preferably, the heavy metals include: at least one of cadmium, lead, arsenic and chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210881330.0A CN115228925B (en) | 2022-07-26 | 2022-07-26 | Stabilizer for restoring soil heavy metal composite pollution and preparation and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210881330.0A CN115228925B (en) | 2022-07-26 | 2022-07-26 | Stabilizer for restoring soil heavy metal composite pollution and preparation and application thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN115228925A true CN115228925A (en) | 2022-10-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108841398A (en) * | 2018-08-09 | 2018-11-20 | 北京泷涛环境修复有限公司 | Medicament, preparation method and restorative procedure are repaired in passivation for As polluted soil |
| CN110229671A (en) * | 2019-05-31 | 2019-09-13 | 湖南净源环境工程有限公司 | A kind of preparation method and application of soil conditioner |
| CN111944538A (en) * | 2020-09-21 | 2020-11-17 | 湖南凯迪工程科技有限公司 | Stabilizer for repairing soil cadmium, lead and arsenic combined pollution and preparation method thereof |
| CN113000594A (en) * | 2021-03-05 | 2021-06-22 | 黑龙江省寰弘农业科技有限公司 | Hemp stalk core repairing agent repairing method for heavy metal contaminated soil |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108841398A (en) * | 2018-08-09 | 2018-11-20 | 北京泷涛环境修复有限公司 | Medicament, preparation method and restorative procedure are repaired in passivation for As polluted soil |
| CN110229671A (en) * | 2019-05-31 | 2019-09-13 | 湖南净源环境工程有限公司 | A kind of preparation method and application of soil conditioner |
| CN111944538A (en) * | 2020-09-21 | 2020-11-17 | 湖南凯迪工程科技有限公司 | Stabilizer for repairing soil cadmium, lead and arsenic combined pollution and preparation method thereof |
| CN113000594A (en) * | 2021-03-05 | 2021-06-22 | 黑龙江省寰弘农业科技有限公司 | Hemp stalk core repairing agent repairing method for heavy metal contaminated soil |
Non-Patent Citations (1)
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| 赵乃昕等: "《医学细菌名称及分类鉴定》", vol. 3, 河南科学技术出版社, pages: 255 - 84 * |
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