CN113956002A - Heavy metal contaminated soil multi-solid waste composite stabilizer and preparation method thereof - Google Patents
Heavy metal contaminated soil multi-solid waste composite stabilizer and preparation method thereof Download PDFInfo
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- CN113956002A CN113956002A CN202111505657.XA CN202111505657A CN113956002A CN 113956002 A CN113956002 A CN 113956002A CN 202111505657 A CN202111505657 A CN 202111505657A CN 113956002 A CN113956002 A CN 113956002A
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- 239000002689 soil Substances 0.000 title claims abstract description 65
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 44
- 239000002910 solid waste Substances 0.000 title claims abstract description 23
- 239000006084 composite stabilizer Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 31
- 239000002893 slag Substances 0.000 claims abstract description 26
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004021 humic acid Substances 0.000 claims abstract description 22
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 150000002500 ions Chemical class 0.000 claims abstract description 20
- 239000003607 modifier Substances 0.000 claims abstract description 18
- 239000003381 stabilizer Substances 0.000 claims abstract description 18
- 230000002940 repellent Effects 0.000 claims abstract description 17
- 239000005871 repellent Substances 0.000 claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 14
- 239000011398 Portland cement Substances 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000014759 maintenance of location Effects 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000011343 solid material Substances 0.000 claims description 9
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 8
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 6
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 6
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 6
- 239000011736 potassium bicarbonate Substances 0.000 claims description 6
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 6
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 2
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 2
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 2
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims description 2
- 235000019796 monopotassium phosphate Nutrition 0.000 claims description 2
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 claims description 2
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 2
- 239000012190 activator Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 13
- 229910052787 antimony Inorganic materials 0.000 description 11
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 11
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 10
- 238000005067 remediation Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000011105 stabilization Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 238000002386 leaching Methods 0.000 description 5
- 230000008439 repair process Effects 0.000 description 5
- 235000010265 sodium sulphite Nutrition 0.000 description 5
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical group OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- YHGPYBQVSJBGHH-UHFFFAOYSA-H iron(3+);trisulfate;pentahydrate Chemical group O.O.O.O.O.[Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O YHGPYBQVSJBGHH-UHFFFAOYSA-H 0.000 description 4
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 4
- 239000010451 perlite Substances 0.000 description 4
- 235000019362 perlite Nutrition 0.000 description 4
- 239000003755 preservative agent Substances 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- XYRAEZLPSATLHH-UHFFFAOYSA-N trisodium methoxy(trioxido)silane Chemical group [Na+].[Na+].[Na+].CO[Si]([O-])([O-])[O-] XYRAEZLPSATLHH-UHFFFAOYSA-N 0.000 description 4
- 239000002440 industrial waste Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- -1 silicate anions Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical group O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000003583 soil stabilizing agent Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
- C04B2111/00775—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes the composition being used as waste barriers or the like, e.g. compositions used for waste disposal purposes only, but not containing the waste itself
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a heavy metal contaminated soil multi-solid waste composite stabilizer and a preparation method thereof, belonging to the technical field of ecological restoration and comprising the following raw materials in parts by weight: 25-30 parts of aluminum slag, 10-20 parts of steel slag, 15-20 parts of rock powder, 10-15 parts of ordinary portland cement, 6-10 parts of an activator, 1-4 parts of an ion replacing agent, 2-4 parts of a water repellent, 5-8 parts of a retarder, 1-2 parts of an early strength agent, 2-4 parts of a strength retention agent, 0.4-1 part of a water reducing agent, 1-1.5 parts of a humic acid modifier and 1-1.5 parts of a stabilizer.
Description
Technical Field
The invention belongs to the technical field of ecological restoration, and particularly relates to a heavy metal contaminated soil multi-solid waste composite stabilizer and a preparation method thereof.
Background
In recent years, heavy metal pollution events frequently occur in China, and the soil environment quality and the grain safety in China are seriously influenced. The heavy metal pollution sources of soil in China mainly include industrial field relocation, municipal waste, sewage irrigation, settlement in atmosphere, improper disposal of waste and the like.
The soil pollution has the characteristics of complex cause, wide pollution range, high treatment cost and the like. Therefore, research on soil heavy metal pollution remediation technology is receiving much attention. At present, a large number of reports related to soil heavy metal pollution remediation technologies at home and abroad mainly comprise a soil leaching method, a bioremediation method, a barrier landfill method and a solidification-stabilization method A, and the remediation principle comprises the two steps of firstly changing the form of heavy metals in soil to reduce the migration and bioavailability of the heavy metals in the soil in the environment, and secondly removing the heavy metals from the soil to ensure that the residual concentration of the heavy metals reaches the allowable value of the soil.
The solidification-stabilization technology is to add a remediation agent into soil to reduce the migration and diffusion of heavy metals in the soil. International geotechnical engineers and geotechnical researchers are both concerned with this technology. In the united states, the best treatment technology was identified to effectively treat the hazardous waste listed in the 57 Resource Conservation and Recovery Act (RCRA). Best technology to recover hazardous waste listed in the Act of the Reserve Bureau (RCRA). The curing/stabilization technique has been successfully applied to the rehabilitation of contaminated sites for about 24% of the capital investment. In france, the solidification/stabilization technique is generally used to solidify industrial waste deposited in solid waste landfills, and in addition, it is the only method of disposal of industrial waste in landfills. In the uk, the solidification/stabilization technique is specified as a method of treatment of industrial waste and contaminated sludge. In japan, the solidification/stabilization technique for treating contaminated soil and solid waste has been a priority and important research topic in the field of environmental rock engineering in the 21 st century. However, the technology is still to be researched at present, and the solidifying effect of 3 repairing agents, namely furfural residue, ground phosphate rock and weathered coal, on heavy metal composite polluted soil is researched by Zhanglijie et al. Research shows that different repairing agents have certain repairing effect on heavy metals, but the repairing agents can adversely affect the soil structure.
Therefore, the research on the heavy metal contaminated soil focuses on developing a remediation technology which is environment-friendly, economical and easy to implement. The method is characterized by exploring the influence of different medicament ratios on the repair effect of the heavy metal antimony, verifying the practicability of the heavy metal antimony through project implementation, and exploring and establishing a set of heavy metal antimony repair construction process which not only meets the repair requirement but also is convenient for construction management.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a heavy metal contaminated soil multi-solid waste composite stabilizer and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
the heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following raw materials in parts by weight: 25-30 parts of aluminum slag, 10-20 parts of steel slag, 15-20 parts of rock powder, 10-15 parts of ordinary portland cement, 6-10 parts of an exciting agent, 1-4 parts of an ion replacing agent, 2-4 parts of a water repellent, 5-8 parts of a retarder, 1-2 parts of an early strength admixture, 2-4 parts of a strength retention agent, 0.4-1 part of a water reducing agent, 1-1.5 parts of a humic acid modifier and 1-1.5 parts of a stabilizer.
Further, the activator is any one of water glass, sodium hydroxide, potassium dihydrogen phosphate and ammonium dihydrogen phosphate.
Further, the ion replacing agent is any one of ferric nitrate, aluminum chloride and light-burned magnesium oxide.
Furthermore, the early strength agent is any one of potassium bicarbonate, diethanolamine and triethanolamine.
Further, the preparation method of the heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following steps: feeding the solid materials of the aluminum slag, the steel slag, the rock powder, the ordinary portland cement, the water repellent, the early strength agent, the strength retention agent, the stabilizer and the humic acid modifier which are proportioned in the claim 1 into a ball mill for grinding for 10min, uniformly mixing the taken powder, pouring the powder into soil, uniformly mixing the powder with the soil, pouring the retarder, the water reducer, the excitant and the ion replacement agent which are proportioned in the claim 1 into the soil, stirring, and compacting after stirring, wherein the compacting thickness needs to reach 20 cm.
The invention has the advantages and beneficial effects that:
the soil stabilizer provided by the invention is simple in construction process and easy to operate, especially plays an active role in repairing the soil polluted by heavy metal antimony, a certain amount of the stable stabilizer is added into the soil and uniformly mixed, and the soil polluted by the heavy metal antimony can be recovered under the condition of compaction treatment under the optimal water content of the soil.
In addition, cement is added as a curing agent in the invention, so that the effect of promoting the repair of the heavy metal antimony is promoted because silicate anions in the cement exist in isolated tetrahedrons and are gradually connected into dimers and named polymer calcium silicate monohydrate (CSH) during hydration, and calcium hydroxide is generated at the same time. CSH is a solid gel composed of hydrates with different polymerization degrees, is the most main substance of cement coagulation, can carry out physical encapsulation, adsorption or chemical bonding and other actions on pollutants, and is the fundamental guarantee for stabilizing heavy metal ions.
The curing agent product of the invention is added with sodium sulfite as a humic acid modifier, so that the humic acid in the soil is sulfonated, and the inhibition effect of the humic acid on the cement is sensed, thereby the repair effect of the cement on heavy metal antimony can be fully exerted. In addition, in the invention, various solid wastes are utilized for production, so that some wastes are changed into valuables, the aim of harmonious symbiosis between people and nature is really realized, and the ecology is restored.
In conclusion, the high humic acid soil curing agent disclosed by the invention effectively solves the problem of curing of humic acid-containing soil, greatly improves the performance indexes of the cured soil such as compactness, strength, durability and stability, and has good economic and environmental benefits.
Detailed Description
In order to further illustrate the present invention, the following examples are given in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
The heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following raw materials in parts by weight: 25 parts of aluminum slag, 15 parts of steel slag, 15 parts of rock powder, 15 parts of ordinary portland cement, 10 parts of an exciting agent, 2 parts of an ion replacing agent, 4 parts of a water repellent, 8 parts of a retarder, 1 part of an early strength agent, 2 parts of a strength retention agent, 0.5 part of a water reducing agent, 1 part of a humic acid modifier and 1.5 parts of a stabilizer.
The excitant is water glass; the ion replacing agent is ferric nitrate; the water repellent is sodium methyl silicate; the retarder is amino trimethylene phosphonic acid; the early strength agent is potassium bicarbonate; the strength-preserving agent is perlite; the stabilizer is ferric sulfate; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the humic acid modifier is sodium sulfite.
The preparation method of the heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following steps: feeding solid materials such as aluminum slag, steel slag, rock powder, ordinary portland cement, a water repellent, an early strength agent, a strength retention agent, a stabilizer and a humic acid modifier into a ball mill for grinding for 10min, taking out the solid materials, uniformly mixing the powder, pouring the powder into soil, uniformly mixing the powder with the soil, pouring a retarder, a water reducing agent, an activator and an ion replacement agent which are proportioned according to claim 1 into the soil, stirring, and then compacting after stirring, wherein the compacting thickness needs to reach 20cm, the 28d lateral-line-free compressive strength can reach 3.05MPA, and the leaching rate concentration of heavy metal antimony in the soil after repairing is lower than 0.02mg/L, so that the repairing requirement is met.
Example 2
The heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following raw materials in parts by weight: 30 parts of aluminum slag, 10 parts of steel slag, 20 parts of rock powder, 10 parts of ordinary portland cement, 10 parts of an exciting agent, 2 parts of an ion replacing agent, 4 parts of a water repellent, 8 parts of a retarder, 1 part of an early strength agent, 2 parts of a strength retention agent, 0.5 part of a water reducing agent, 1 part of a humic acid modifier and 1.5 parts of a stabilizer.
The excitant is sodium hydroxide; the ion replacing agent is aluminum chloride; the water repellent is sodium methyl silicate; the retarder is amino trimethylene phosphonic acid; the early strength agent is potassium bicarbonate; the strength-preserving agent is perlite; the stabilizer is ferric sulfate; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the humic acid modifier is sodium sulfite.
The preparation method of the heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following steps: feeding solid materials such as aluminum slag, steel slag, rock powder, ordinary portland cement, a water repellent, an early strength agent, a strength retention agent, a stabilizer and a humic acid modifier into a ball mill for grinding for 10min, taking out the solid materials, uniformly mixing the powder, pouring the powder into soil, uniformly mixing the powder with the soil, pouring a retarder, a water reducing agent, an activator and an ion replacement agent which are proportioned according to claim 1 into the soil, stirring, and then compacting after stirring, wherein the compacting thickness needs to reach 20cm, the 28d side-line-free compressive strength can reach 3.21MPA, and the leaching rate concentration of heavy metal antimony in the soil after remediation is lower than 0.02mg/L, so that the remediation requirement is met.
Example 3
The heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following raw materials in parts by weight: 25 parts of aluminum slag, 15 parts of steel slag, 15 parts of rock powder, 15 parts of ordinary portland cement, 10 parts of an exciting agent, 2 parts of an ion replacing agent, 4 parts of a water repellent, 5 parts of a retarder, 2 parts of an early strength agent, 4 parts of a strength retention agent, 0.5 part of a water reducing agent, 1.5 parts of a humic acid modifier and 1 part of a stabilizer.
The excitant is sodium hydroxide; the ion replacing agent is aluminum chloride; the water repellent is sodium methyl silicate; the retarder is amino trimethylene phosphonic acid; the early strength agent is potassium bicarbonate; the strength-preserving agent is perlite; the stabilizer is ferric sulfate; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the humic acid modifier is sodium sulfite.
The preparation method of the heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following steps: feeding solid materials such as aluminum slag, steel slag, rock powder, ordinary portland cement, a water repellent, an early strength agent, a strength retention agent, a stabilizer and a humic acid modifier into a ball mill for grinding for 10min, taking out the solid materials, uniformly mixing the powder, pouring the powder into soil, uniformly mixing the powder with the soil, pouring a retarder, a water reducing agent, an activator and an ion replacement agent which are proportioned according to claim 1 into the soil, stirring, and then compacting after stirring, wherein the compacting thickness needs to reach 20cm, the 28d side-line-free compressive strength can reach 2.96MPA, and the leaching rate concentration of heavy metal antimony in the soil after remediation is lower than 0.02mg/L, so that the remediation requirement is met.
Example 4
The heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following raw materials in parts by weight: 25 parts of aluminum slag, 10 parts of steel slag, 20 parts of rock powder, 14.5 parts of ordinary portland cement, 10 parts of an exciting agent, 2 parts of an ion replacing agent, 4 parts of a water repellent, 8 parts of a retarder, 1 part of an early strength agent, 2 parts of a strength retention agent, 0.5 part of a water reducing agent, 1.5 parts of a humic acid modifier and 1.5 parts of a stabilizer.
The excitant is water glass; the ion replacing agent is ferric nitrate; the water repellent is sodium methyl silicate; the retarder is amino trimethylene phosphonic acid; the early strength agent is potassium bicarbonate; the strength-preserving agent is perlite; the stabilizer is ferric sulfate; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the humic acid modifier is sodium sulfite.
A preparation method of a heavy metal contaminated soil multi-solid waste composite stabilizer comprises the following steps: feeding solid materials of the aluminum slag, the steel slag, the rock powder, the ordinary portland cement, the water repellent, the early strength agent, the strength retention agent, the stabilizer and the humic acid modifier which are proportioned in the claim 1 into a ball mill for grinding for 10min, uniformly mixing the taken powder, pouring the powder into soil, uniformly mixing the powder with the soil, pouring the retarder, the water reducer, the activator and the ion replacement agent which are proportioned in the claim 1 into the soil, stirring, compacting after stirring, wherein the compacting thickness needs to reach 20cm, the 28d side-line-free compressive strength can reach 2.93MPA, the leaching concentration of heavy metal antimony in the soil after repairing is lower than 0.02mg/L, and the repairing requirement is met.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (5)
1. The heavy metal contaminated soil multi-solid waste composite stabilizer is characterized by comprising the following raw materials in parts by weight: 25-30 parts of aluminum slag, 10-20 parts of steel slag, 15-20 parts of rock powder, 10-15 parts of ordinary portland cement, 6-10 parts of an exciting agent, 1-4 parts of an ion replacing agent, 2-4 parts of a water repellent, 5-8 parts of a retarder, 1-2 parts of an early strength admixture, 2-4 parts of a strength retention agent, 0.4-1 part of a water reducing agent, 1-1.5 parts of a humic acid modifier and 1-1.5 parts of a stabilizer.
2. The heavy metal contaminated soil multi-solid waste composite stabilizer according to claim 1, which is characterized in that: the excitant is any one of water glass, sodium hydroxide, potassium dihydrogen phosphate and ammonium dihydrogen phosphate.
3. The heavy metal contaminated soil multi-solid waste composite stabilizer according to claim 1, which is characterized in that: the ion replacing agent is any one of ferric nitrate, aluminum chloride and light-burned magnesium oxide.
4. The heavy metal contaminated soil multi-solid waste composite stabilizer according to claim 1, which is characterized in that: the early strength agent is any one of potassium bicarbonate, diethanolamine and triethanolamine.
5. The preparation method of the heavy metal contaminated soil multi-solid waste composite stabilizer according to claim 1, characterized by comprising the following steps: feeding the solid materials of the aluminum slag, the steel slag, the rock powder, the ordinary portland cement, the water repellent, the early strength agent, the strength retention agent, the stabilizer and the humic acid modifier which are proportioned in the claim 1 into a ball mill for grinding for 10min, uniformly mixing the taken powder, pouring the powder into soil, uniformly mixing the powder with the soil, pouring the retarder, the water reducer, the excitant and the ion replacement agent which are proportioned in the claim 1 into the soil, stirring, and compacting after stirring, wherein the compacting thickness needs to reach 20 cm.
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| CN105236908A (en) * | 2015-10-22 | 2016-01-13 | 浙江大学宁波理工学院 | Soft soil curing agent prepared by means of industrial residues |
| CN113337293A (en) * | 2021-06-23 | 2021-09-03 | 哈尔滨工业大学 | Anti-freezing solidification stabilizing agent for antimony-polluted soil and preparation method and application thereof |
| CN113683381A (en) * | 2021-09-09 | 2021-11-23 | 吉林建筑科技学院 | High humic acid soil curing agent and preparation method thereof |
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| CN105236908A (en) * | 2015-10-22 | 2016-01-13 | 浙江大学宁波理工学院 | Soft soil curing agent prepared by means of industrial residues |
| CN113337293A (en) * | 2021-06-23 | 2021-09-03 | 哈尔滨工业大学 | Anti-freezing solidification stabilizing agent for antimony-polluted soil and preparation method and application thereof |
| CN113683381A (en) * | 2021-09-09 | 2021-11-23 | 吉林建筑科技学院 | High humic acid soil curing agent and preparation method thereof |
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