CN106978184A - Curing agent and methods for making and using same for Compound Heavy Metals soil - Google Patents
Curing agent and methods for making and using same for Compound Heavy Metals soil Download PDFInfo
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- CN106978184A CN106978184A CN201710243117.6A CN201710243117A CN106978184A CN 106978184 A CN106978184 A CN 106978184A CN 201710243117 A CN201710243117 A CN 201710243117A CN 106978184 A CN106978184 A CN 106978184A
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- curing agent
- soil
- bone meal
- heavy metal
- bone
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- 239000002689 soil Substances 0.000 title claims abstract description 120
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 107
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 61
- 150000001875 compounds Chemical class 0.000 title claims abstract description 48
- 229940036811 bone meal Drugs 0.000 claims abstract description 84
- 239000002374 bone meal Substances 0.000 claims abstract description 84
- 239000002893 slag Substances 0.000 claims abstract description 72
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 33
- 239000010452 phosphate Substances 0.000 claims abstract description 33
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000009628 steelmaking Methods 0.000 claims abstract description 20
- 238000001723 curing Methods 0.000 claims description 66
- 210000000988 bone and bone Anatomy 0.000 claims description 31
- 238000001994 activation Methods 0.000 claims description 26
- 230000004913 activation Effects 0.000 claims description 21
- 239000000047 product Substances 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 239000002244 precipitate Substances 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- 239000011574 phosphorus Substances 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 238000001354 calcination Methods 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 239000008187 granular material Substances 0.000 claims description 7
- 238000007885 magnetic separation Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 239000004848 polyfunctional curative Substances 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 238000007711 solidification Methods 0.000 abstract description 18
- 230000008023 solidification Effects 0.000 abstract description 18
- 238000002386 leaching Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 15
- 230000006641 stabilisation Effects 0.000 abstract description 9
- 238000011105 stabilization Methods 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 238000011161 development Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 231100000419 toxicity Toxicity 0.000 abstract description 5
- 230000001988 toxicity Effects 0.000 abstract description 5
- 239000002253 acid Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 235000021317 phosphate Nutrition 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 22
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 18
- 235000019796 monopotassium phosphate Nutrition 0.000 description 18
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 18
- 238000012360 testing method Methods 0.000 description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 238000010025 steaming Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000000292 calcium oxide Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- 239000000395 magnesium oxide Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229910052681 coesite Inorganic materials 0.000 description 6
- 229910052906 cristobalite Inorganic materials 0.000 description 6
- 239000011133 lead Substances 0.000 description 6
- 238000011068 loading method Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 230000007226 seed germination Effects 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 229910052682 stishovite Inorganic materials 0.000 description 6
- 229910052905 tridymite Inorganic materials 0.000 description 6
- 206010013786 Dry skin Diseases 0.000 description 5
- 230000035784 germination Effects 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 235000010469 Glycine max Nutrition 0.000 description 3
- 244000068988 Glycine max Species 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229910052745 lead Inorganic materials 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000003900 soil pollution Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 231100000674 Phytotoxicity Toxicity 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000010669 acid-base reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000013006 addition curing Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000783 metal toxicity Toxicity 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000003802 soil pollutant Substances 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000002110 toxicologic effect Effects 0.000 description 1
- 231100000027 toxicology Toxicity 0.000 description 1
- 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 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/04—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only applied in a physical form other than a solution or a grout, e.g. as granules or gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/08—Aluminium compounds, e.g. aluminium hydroxide
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of curing agent and methods for making and using same for Compound Heavy Metals soil, the curing agent is made up of the material of following mass percent：Steel-making slag powder 40 65%；Light calcined magnesia 5 25%；Phosphate activates bone meal 20 45%.It is an advantage of the invention that：First, the curing agent can significantly reduce heavy metals mobilization and toxicity leaching content in heavy metal polluted soil, particularly for content of beary metal height and the more acid pollution place of pollutant kind, Polluted Soil can significantly reduce the environmental risk in the second development and utilization of contaminated site after repairing as environmentally friendly material recycling；Meanwhile, the curing agent raw material are easily obtained, it is with low cost, prepare simple, easy to use, effect stability, can be in large-scale application in the solidification and stabilization in combined pollution place is repaired.
Description
Technical field
The present invention relates to environmental geotechnical field, more particularly to a kind of curing agent for Compound Heavy Metals soil and
Methods for making and using same.
Background technology
With the adjustment of China's city function and city layout, original position is in the enterprise of downtown area, suburb, such as chemical industry
Factory, metallurgical works, Electroplate Factory etc. all progressively close down or Tui Chengjin gardens, but industry, the production process of enterprise for many years, are removed at it
A large amount of pollutants are have accumulated in the soil left after moving, is not only that efficient utilize for leaving soil brings resistance, is also surrounding
Environment brings serious potential safety hazard.In recent years, government promulgates《Soil Pollution Control action plan》(ten, soil) is also by dirt
Dye soil remediation work is considered as one of current important people's livelihood engineering, carries out the work of associated contamination repairing and treating extremely urgent.
The features such as industrial pollution place heavy metal pollution of soil is rendered as many heavy metal species, high content and big acidity.
In the reparation in heavy metal pollution place, solidification stabilization technique is widely adopted.Conventional curing agent mainly includes cement, lime
And the material such as phosphate, heavy metal solidification and stabilization has good effect, but there is also substantial amounts of shortcoming, for example, produces water
Mud energy consumption is big, greenhouse gas emission is more etc.；Lime, phosphate are non-renewable natural minerals, cost height etc.；And it is phosphatic
It is a large amount of to apply, it can seriously change soil texture and further trigger the phosphorus pollution of underground water, surface water.
In summary, there is many defects in conventional curing agents, it is desirable to reduce the use of cement and phosphate material, find one
Stabilizing heavy metal can be solidified by planting, while solidifying, stabilization efficiency is high, with low cost, performance is stable, material source is extensive and environment is friendly
Good Novel curing agent turns into environmentally friendly scientific worker's focus of attention.
The content of the invention
Goal of the invention：The first object of the present invention is to provide a kind of heavy metal that can be significantly reduced in heavy metal polluted soil
The curing agent of the Compound Heavy Metals soil of migration and toxicity leaching content；It is heavy metal-polluted that the second object of the present invention is to provide this
Contaminate the preparation method of soil consolidator；The third object of the present invention is to provide the application process of the heavy metal pollution soil consolidator.
Technical scheme：Curing agent of the present invention for Compound Heavy Metals soil, by the thing of following mass percent
Material composition：Steel-making slag powder 40-65%；Light calcined magnesia 5-25%；Phosphate activation bone meal 20-45%.
The steel-making slag powder is the activated steel slag powder being prepared from by following methods：
(1) by the one or more in the vessel slag after magnetic separation, open hearth slag and the contour active slag of lectric furnace slag
By broken sieving；
(2) drying materials to its moisture content for taking particle diameter to be less than 2mm in the product obtained is less than 2%, it is preferred to use 100-
105 DEG C of airflow drying；
(3) product obtained is ground and crosses after the sieve of 150-200 mesh and (can for example use ball milling), then through 500-700
DEG C calcining 1-2h (can for example be preferred to use electric furnace calcining, energy-saving practical), obtains activated steel slag powder.
The phosphate activation bone meal is prepared from by following methods：
(1) prepare concentration for 0.01-0.05mol/L phosphate solution (phosphate is preferred to use potassium dihydrogen phosphate, its
The aqueous solution is acidity, more preferable to activity of steel slag effect), by the ground 150-200 mesh sieves of bone meal, obtain levigate bone meal；
(2) by levigate bone meal and aluminum sulfate according to mass ratio 20-30:1 mixing, obtains levigate bone meal compound；
(3) by the levigate bone meal compound of gained and phosphate solution according to 1：10-15 ratio is mixed, in 20-30
36-48h is stood after vibration stirring 10-15h at DEG C, gelatinous precipitate is obtained；
(4) gelatinous precipitate is less than 2%, products therefrom mill using 100-250 DEG C airflow drying to its moisture content
It is thin to cross 150-200 mesh sieves, phosphate activation bone meal is obtained, wherein, for example can be quick using airflow drying, medicament is difficult knot
Block, facilitates follow-up medicament to produce.
The steamed bone meal that the bone meal obtains for steaming bone method.
The steamed bone meal is prepared from by following methods：Beast bone will be dried to be broken into after the block less than 5cm, in 115-
24h is steamed at 130 DEG C, then is dried at 60-80 DEG C to constant mass, 0.5-1h is calcined at 140-160 DEG C, levigate mistake after cooling
150-200 mesh sieves.
The dry beast bone is the one or more in pig bone, ox bone or fish-bone, and calcium content is more than 30% after steam treatment,
Phosphorus content is more than 14%.
The preparation method of the curing agent for Compound Heavy Metals soil comprises the following steps：By weight percentage will
Steel-making slag powder, light calcined magnesia and phosphate activation bone meal mixed, using dry stirring 0.5-1h to be well mixed after mistake
150-200 mesh sieves, obtain curing agent.
The application process of curing agent for Compound Heavy Metals soil is：By the curing agent and heavy metal pollution
Soil is mixed, wherein, the hardener dose is the 5-15% of heavy metal polluted soil dry weight, and the heavy metal polluted soil
Moisture content is 16-30%.
The granule content that particle diameter is less than 0.075mm in the heavy metal polluted soil is 65-100%, and wherein heavy metal lead contains
Amount is more than 2000mg/kg, and heavy metal zinc content is more than 2000mg/kg, and heavy metal copper content is more than 2000mg/kg, heavy metal nickel
Content is more than 2000mg/kg.
Beneficial effect：Compared with prior art, significant advantage of the invention is：
(1) heavy metals immobilization effect is good.First, the bone meal activation process being related in the present invention can improve the surface of bone meal
The stripping quantity of morphological feature and available phosphorus, is effectively increased absorption, the sedimentation effect of its heavy metal ion；Secondly, steel-making slag powder exists
Under the excitation of magnesia, its potential gelling characteristic is showed, and the calcium phosphate precipitation and hydroxide of heavy metal sink
Shallow lake has carried out effective package action, greatly strengthen the simple solidification and stabilization effect using phosphate heavy metal；Again,
The calcium oxide aquation generation Ca (OH) being dissolved out in slag2, pass through the acidic materials in acid-base reaction and in contaminated soil.
(2) excellent in durability.Conventional curing agents are easily corroded by carbon dioxide and acid-rain corrosion is influenceed, and produce solidification pollution
Native environmental safety and engineering characteristic deteriorate relaxation phenomenon.The curing agent being related in the present invention can effectively overcome disadvantages mentioned above,
Because the heavy phosphates class of generation is precipitated, its solubility under a variety of pH environment is relatively low, and is produced in the aquation of slag
Under the package action of thing C-S-H gels, contact of the heavy metal precipitation with acid solution can be effectively reduced；Slag has in itself simultaneously
There is the ability of extremely strong acid buffer capacity and absorbing carbon dioxide, under carbon dioxide corrosion function, generate CaCO3Crystal is further
Fill the hole of firming body, effectively reduction acid solution infiltration capacity, the stability of further increase firming body in the presence of a harsh environment.
(3) waste material, environmentally friendly curing agent are effectively utilized.First, slag is used as a kind of industrial residue, large area
Accumulation, has had resulted in serious environmental pollution, by the activation to slag, effectively increases the value of slag, becomes useless
For treasured.Secondly, slag is directly used in the solidification and stabilization of heavy metal polluted soil as a kind of overbased material, solidified earth pH
It is higher, it can be utilized to the later development in soil and bring many problems, the pH of solidified earth is effectively reduced by activating bone meal addition,
And by the addition of potassium dihydrogen phosphate, the solidification and stabilization effect of its heavy metal is reached most preferably.Again, poultry bone is also one
Kind of industrial residue, by steam, calcine and activation process after can realize slag is excited, increase slag hydration activity and
The solidification and stabilization effect of heavy metal.
Embodiment
Embodiment 1
Curing agent of the present invention for Compound Heavy Metals soil, is made up of the material of following mass parts：Steel-making slag powder 45%；
Light calcined magnesia 20%；Phosphate activates bone meal 35%.
The steel-making slag powder is the activated steel slag powder being prepared from by following methods：Vessel slag is crushed after magnetic separation
Sieving；Taking particle diameter to be less than 2mm material and place in obtained product uses temperature to contain for 105 DEG C of airflow drying to it in baking oven
Water rate is 1%；Obtained product is ground and crossed after the sieve of 200 mesh, then is obtained through 700 DEG C of electric furnaces calcining 2h.The steel-making slag powder
Basicity value is 2.07.
The main component and content of the slag are shown in Table 1, what deserves to be explained is, the slag for the present invention is not limited to table
Data in 1, it is only the slag that the present embodiment is used：
The slag main component of table 1 and content
| Main chemical compositions | CaO | SiO2 | Al2O3 | Fe2O3 | MgO | P2O5 |
| Content (%) | 36.30 | 16.26 | 3.32 | 18.66 | 8.35 | 1.26 |
The phosphate activation bone meal is prepared from by following methods：Prepare the potassium dihydrogen phosphate that concentration is 0.05mol/L
Solution, and by ground 200 mesh sieve of bone meal, obtain levigate bone meal；By the ratio 30 of levigate bone meal and aluminum sulfate according to quality:1 enters
Row is sufficiently mixed, and obtains levigate bone meal compound；According to solid-to-liquid ratio it is 1 by gained compound and potassium dihydrogen phosphate：12
Ratio is mixed, at 25 DEG C, is stood 48h after vibration stirring 15h, is obtained gelatinous precipitate；Gelatinous precipitate is adopted
It is 1% with 200 DEG C of airflow dryings to its moisture content, ground 200 mesh sieve of products therefrom obtains loading the work of potassium dihydrogen phosphate
Change bone meal.
The steamed bone meal that the bone meal obtains for steaming bone method.
The steamed bone meal is prepared from by following methods：Beast bone will be dried to be broken into after the block less than 3cm, at 130 DEG C
Lower steaming 24h, then dried at 80 DEG C to constant mass, 1h is calcined at 160 DEG C, the levigate mesh sieve of mistake 200 after cooling.
The dry beast bone is ox bone, and calcium content is 32.2% after steam treatment, and phosphorus content is 14.7%.
Each component content is in the light calcined magnesia：MgO：88.24%, SiO2：4.70%, CaO：4.63%, volume
Density 3.18g/cm3。
The curing agent for Compound Heavy Metals soil, which comprises the following steps, to be prepared from：By the steel of above-mentioned mass parts
Ground-slag, light calcined magnesia and phosphate activation bone meal are mixed, and 200 mesh are crossed to after being well mixed using dry stirring 1h
Sieve, obtains curing agent.
The application process of curing agent for Compound Heavy Metals soil is specially：By curing agent and heavy metal pollution
Soil carries out original place mixing, wherein, the hardener dose (accounts for composition metal dirty for the 5% of heavy metal polluted soil dry weight
The native dry weight of dye).Heavy metal contaminants have two kinds：Polluted Soil a, is derived from lead, the zinc combined pollution soil in a certain industrial pollution place；It is dirty
Soil b is contaminated, copper, the nickel combined pollution soil in certain two industrial pollution place is derived from.Other main physicochemical properties are as shown in table 2.
The Polluted Soil Main physical chemical property of table 2
Embodiment 2
It is identical with the preparation process and maintenance processes of embodiment 1, except that, the volume of curing agent is 10% (solidification
Agent accounts for heavy metal and organic compound contaminated native dry weight).
Embodiment 3
It is identical with the preparation process and maintenance processes of embodiment 1, except that, the volume of curing agent is 15% (solidification
Agent accounts for heavy metal and organic compound contaminated native dry weight).
Comparative example 4
Without any curing agent, only the Compound Heavy Metals soil sample in Example 1.
Comparative example 5
Curing agent is prepared without overactivation using the slag in embodiment 1, other preparation processes are constant, volume and embodiment
3 be all mutually 15%.
Embodiment 4
Curing agent of the present invention for Compound Heavy Metals soil, is made up of the material of following mass parts：Steel-making slag powder 40%；
Light calcined magnesia 25%；Phosphate activates bone meal 35%.
The steel-making slag powder is the activated steel slag powder being prepared from by following methods：Vessel slag is crushed after magnetic separation
Sieving；Taking particle diameter to be less than 2mm material and place in obtained product uses temperature to contain for 105 DEG C of airflow drying to it in baking oven
Water rate is 0.5%；Obtained product is ground and crossed after the sieve of 150 mesh, then is obtained through 500 DEG C of electric furnaces calcining 1h.The slag
Powder basicity value is 2.6.
The phosphate activation bone meal is prepared from by following methods：Prepare the potassium dihydrogen phosphate that concentration is 0.01mol/L
Solution, and by ground 150 mesh sieve of bone meal, obtain levigate bone meal；By the ratio 20 of levigate bone meal and aluminum sulfate according to quality:1 enters
Row is sufficiently mixed, and obtains levigate bone meal compound；According to solid-to-liquid ratio it is 1 by gained compound and potassium dihydrogen phosphate：10
Ratio is mixed, at 20 DEG C, is stood 36h after vibration stirring 10h, is obtained gelatinous precipitate；Gelatinous precipitate is adopted
It is 0.5% with 250 DEG C of airflow dryings to its moisture content, ground 150 mesh sieve of products therefrom obtains loading potassium dihydrogen phosphate
Activate bone meal.
The steamed bone meal that the bone meal obtains for steaming bone method.
The steamed bone meal is prepared from by following methods：Beast bone will be dried to be broken into after the block less than 5cm, at 115 DEG C
Lower steaming 24h, then dried at 60 DEG C to constant mass, 0.5h is calcined at 140 DEG C, the levigate mesh sieve of mistake 150 after cooling.
The dry beast bone is pig bone, and calcium content is 31.1% after steam treatment, and phosphorus content is 14.1%.
Each component content is in the light calcined magnesia：MgO：88.24%, SiO2：4.70%, CaO：4.63%, volume
Density 3.18g/cm3。
The curing agent for Compound Heavy Metals soil, which comprises the following steps, to be prepared from：By the steel of above-mentioned mass parts
Ground-slag, light calcined magnesia and phosphate activation bone meal are mixed, and 150 mesh are crossed to after being well mixed using dry stirring 0.5h
Sieve, obtains curing agent.
The application process of curing agent for Compound Heavy Metals soil is specially：By curing agent and heavy metal pollution
Soil carries out original place mixing, wherein, the hardener dose (accounts for composition metal dirty for the 5% of heavy metal polluted soil dry weight
The native dry weight of dye), and the moisture content of the heavy metal polluted soil is 16%, heavy metal polluted soil and the Polluted Soil selected in embodiment 1
Identical, the granule content that particle diameter is less than 0.075mm wherein in the heavy metal polluted soil is 65%.
Embodiment 5
Curing agent of the present invention for Compound Heavy Metals soil, is made up of the material of following mass parts：Steel-making slag powder 40%；
Light calcined magnesia 15%；Phosphate activates bone meal 45%.
The steel-making slag powder is the activated steel slag powder being prepared from by following methods：Vessel slag is crushed after magnetic separation
Sieving；Taking particle diameter to be less than 2mm material and place in obtained product uses temperature to contain for 105 DEG C of airflow drying to it in baking oven
Water rate is 1.5%；Obtained product is ground and crossed after the sieve of 180 mesh, then is obtained through 600 DEG C of electric furnaces calcining 1.5h.The steel
Ground-slag basicity value is 1.8.
The phosphate activation bone meal is prepared from by following methods：Prepare the potassium dihydrogen phosphate that concentration is 0.03mol/L
Solution, and by ground 170 mesh sieve of bone meal, obtain levigate bone meal；By the ratio 25 of levigate bone meal and aluminum sulfate according to quality:1 enters
Row is sufficiently mixed, and obtains levigate bone meal compound；According to solid-to-liquid ratio it is 1 by gained compound and potassium dihydrogen phosphate：15
Ratio is mixed, at 30 DEG C, is stood 42h after vibration stirring 12h, is obtained gelatinous precipitate；Gelatinous precipitate is adopted
It is 1.5% with 100 DEG C of airflow dryings to its moisture content, ground 170 mesh sieve of products therefrom obtains loading potassium dihydrogen phosphate
Activate bone meal.
The steamed bone meal that the bone meal obtains for steaming bone method.
The steamed bone meal is prepared from by following methods：Beast bone will be dried to be broken into after the block less than 4cm, at 125 DEG C
Lower steaming 24h, then dried at 70 DEG C to constant mass, 0.75h is calcined at 150 DEG C, the levigate mesh sieve of mistake 170 after cooling.
The dry beast bone is fish-bone, and calcium content is 32.1% after steam treatment, and phosphorus content is 14.9%.
Each component content is in the light calcined magnesia：MgO：88.24%, SiO2：4.70%, CaO：4.63%, volume
Density 3.18g/cm3。。
The curing agent for Compound Heavy Metals soil, which comprises the following steps, to be prepared from：By the steel of above-mentioned mass parts
Ground-slag, light-magnesite powder and phosphate activation bone meal mixed, using dry stirring 0.75h to be well mixed after mistake
170 mesh sieves.
The application process of curing agent for Compound Heavy Metals soil is specially：By curing agent and heavy metal pollution
Soil carries out original place mixing, wherein, the hardener dose (accounts for composition metal dirty for the 10% of heavy metal polluted soil dry weight
The native dry weight of dye), and the moisture content of the heavy metal polluted soil is 23%, heavy metal polluted soil and the Polluted Soil selected in embodiment 1
It is identical, wherein, the granule content that particle diameter is less than 0.075mm in the heavy metal polluted soil is 82.5%.
Embodiment 6
Curing agent of the present invention for Compound Heavy Metals soil, is made up of the material of following mass parts：Steel-making slag powder 65%；
Light calcined magnesia 5%；Phosphate activates bone meal 30%.
The steel-making slag powder is the activated steel slag powder being prepared from by following methods：Vessel slag is crushed after magnetic separation
Sieving；Taking particle diameter to be less than 2mm material and place in obtained product uses temperature to contain for 105 DEG C of airflow drying to it in baking oven
Water rate is 0.5%；Obtained product is ground and crossed after the sieve of 150 mesh, then is obtained through 500 DEG C of electric furnaces calcining 1h.The slag
Powder basicity value is 2.2.
The phosphate activation bone meal is prepared from by following methods：Prepare the potassium dihydrogen phosphate that concentration is 0.04mol/L
Solution, and by ground 190 mesh sieve of bone meal, obtain levigate bone meal；By the ratio 20 of levigate bone meal and aluminum sulfate according to quality:1 enters
Row is sufficiently mixed, and obtains levigate bone meal compound；According to solid-to-liquid ratio it is 1 by gained compound and potassium dihydrogen phosphate：10
Ratio is mixed, at 20 DEG C, is stood 40h after vibration stirring 10h, is obtained gelatinous precipitate；Gelatinous precipitate is adopted
It is 0.5% with 150 DEG C of airflow dryings to its moisture content, ground 190 mesh sieve of products therefrom obtains loading potassium dihydrogen phosphate
Activate bone meal.
The steamed bone meal that the bone meal obtains for steaming bone method.
The steamed bone meal is prepared from by following methods：Beast bone will be dried to be broken into after the block less than 3cm, at 120 DEG C
Lower steaming 24h, then dried at 60 DEG C to constant mass, 0.5h is calcined at 140 DEG C, the levigate mesh sieve of mistake 190 after cooling.
The dry beast bone is that pig bone and ox bone are mixed, and calcium content is 32.1% after steam treatment, and phosphorus content is 14.2%.
Each component content is in the light calcined magnesia：MgO：88.24%, SiO2：4.70%, CaO：4.63%, volume
Density 3.18g/cm3。
The curing agent for Compound Heavy Metals soil, which comprises the following steps, to be prepared from：By the steel of above-mentioned mass parts
Ground-slag, light calcined magnesia and phosphate activation bone meal are mixed, and 190 are crossed to after being well mixed using dry stirring 0.75h
Mesh sieve, obtains curing agent.
The application process of curing agent for Compound Heavy Metals soil is specially：By curing agent and heavy metal pollution
Soil carries out original place mixing.Wherein, the hardener dose (accounts for composition metal dirty for the 15% of heavy metal polluted soil dry weight
The native dry weight of dye), and the moisture content of the heavy metal polluted soil is 30%.Particle diameter is less than 0.075mm's in heavy metal polluted soil used
Granule content is 83%, and heavy metal polluted soil is identical with the Polluted Soil selected in embodiment 1, wherein, the heavy metal polluted soil
The granule content that middle particle diameter is less than 0.075mm is 100%.
Embodiment 7
Curing agent of the present invention for Compound Heavy Metals soil, is made up of the material of following mass parts：Steel-making slag powder 60%；
Light calcined magnesia 20%；Phosphate activates bone meal 20%.
The steel-making slag powder is the activated steel slag powder being prepared from by following methods：Vessel slag is crushed after magnetic separation
Sieving；Taking particle diameter to be less than 2mm material and place in obtained product uses temperature to contain for 105 DEG C of airflow drying to it in baking oven
Water rate is 0.5%；Obtained product is ground and crossed after the sieve of 150 mesh, then is obtained through 500 DEG C of electric furnaces calcining 1h.The slag
Powder basicity value is 2.4.
The phosphate activation bone meal is prepared from by following methods：Prepare the potassium dihydrogen phosphate that concentration is 0.01mol/L
Solution, and by ground 200 mesh sieve of bone meal, obtain levigate bone meal；By the ratio 20 of levigate bone meal and aluminum sulfate according to quality:1 enters
Row is sufficiently mixed, and obtains levigate bone meal compound；According to solid-to-liquid ratio it is 1 by gained compound and potassium dihydrogen phosphate：10
Ratio is mixed, at 20 DEG C, is stood 36h after vibration stirring 10h, is obtained gelatinous precipitate；Gelatinous precipitate is adopted
It is 0.5% with 250 DEG C of airflow dryings to its moisture content, ground 200 mesh sieve of products therefrom obtains loading potassium dihydrogen phosphate
Activate bone meal.
The steamed bone meal that the bone meal obtains for steaming bone method.
The steamed bone meal is prepared from by following methods：Beast bone will be dried to be broken into after the block less than 5cm, at 115 DEG C
Lower steaming 24h, then dried at 60 DEG C to constant mass, 0.5h is calcined at 140 DEG C, the levigate mesh sieve of mistake 200 after cooling.
The dry beast bone is pig bone, and calcium content is 31.9% after steam treatment, and phosphorus content is 15.1%.
Each component content is in the light calcined magnesia：MgO：88.24%, SiO2：4.70%, CaO：4.63%, volume
Density 3.18g/cm3。
The curing agent for Compound Heavy Metals soil, which comprises the following steps, to be prepared from：By the steel of above-mentioned mass parts
Ground-slag, light calcined magnesia and phosphate activation bone meal are mixed, and 200 are crossed to after being well mixed using dry stirring 0.75h
Mesh sieve.
The application process of curing agent for Compound Heavy Metals soil is specially：By curing agent and heavy metal pollution
Soil carries out original place mixing, wherein, the hardener dose (accounts for composition metal dirty for the 8% of heavy metal polluted soil dry weight
The native dry weight of dye), and the moisture content of the heavy metal polluted soil is 25%, heavy metal polluted soil and the Polluted Soil selected in embodiment 1
It is identical, wherein, the granule content that particle diameter is less than 0.075mm in the heavy metal polluted soil is 90%.
Embodiment 8
To embodiment 1, embodiment 2, embodiment 3, comparative example 1, comparative example 2, embodiment 4, embodiment 5, embodiment 6 and reality
Apply the soil of the sample after implementing in example 7 and sealing is wrapped with freshness protection package, be more than the solidification after being conserved 28 days under the conditions of 95% in 20 DEG C, humidity
Polluted Soil does toxicity characteristic leaching procedure：
Testing standard：National environmental protection professional standard《Solid waste Leaching leaching method sulfonitric method》(HJ/
T 299-2007)。
Process of the test：By the solidification Polluted Soil after maintenance, weigh wherein 50g samples and be placed in drying, constant weight to two at 105 DEG C
The error of secondary weighing value is less than ± 1%, and calculating obtains sample moisture content.Calculated according to moisture content and repair native dry weight, weigh butt
Quality is 10g reparation soil sample, and according to《Solid waste Leaching leaching method sulfonitric method》(HJ/T299-2007)
Defined method and step are tested.Result of the test is as shown in table 3.
The toxicity characteristic leaching procedure result (mg/L) of table 3
Sulfonitric method leaching method be used to evaluate solid waste whether be hazardous waste standard, be also analysis solid
The common method of pollutant Leaching feature of the waste under acid precipitation effect.From the toxicity characteristic leaching procedure result of table 3, lead to
Comparing embodiment 1-7 is crossed to can be seen that：Reparation mixed with curing agent of the present invention is native, Zn, Pb, Ni and Cu leaching in its leachate
Concentration is as the addition content of curing agent increases and reduces, by comparative example 1, the heavy metal in untreated source Polluted Soil
Migration is extremely strong, and heavy metal Zn, Pb, Ni and Cu leaching content are far above《Hazardous waste judging standard leaching characteristic identification》(GB
Boundary value in 5085.3-2007), in conjunction with the embodiments 1-7 can be found that the addition of curing agent can significantly reduce heavy metal
Stripping quantity, increases environmental safety.It was found from embodiment 3 and comparative example 2 are contrasted, curing agent and maintenance 28 in the addition present invention
After it, the stability of heavy metal is all increased, and the stablizing effect in embodiment 3 becomes apparent, and its leaching content is far below《It is dangerous
Waste judging standard leaching characteristic identification》Boundary value in (GB 5085.3-2007), and the steel in curing agent in comparative example 2
Ground-slag is not activated only to be prepared by loading phosphatic charcoal, and it can reduce heavy metal Zn, Pb, Ni in a ground degree
And migration characteristics of the Cu in soil, the harm of its environmentally safe property is reduced, the basic demand of the present invention can be still met, by
This understands, carries out activation modification processing to slag used, can effectively strengthen the solidification stablizing effect to curing agent heavy metal, such as
Fruit slag can also realize the technique effect of the present invention to a certain extent without activation process.
Embodiment 9
To embodiment 1, embodiment 2, embodiment 3, comparative example 1, comparative example 2, embodiment 4, embodiment 5, embodiment 6 and reality
Apply the solidification Polluted Soil after example 7 is conserved as described in Example 8 and do reparation mud acid alkalinity test：
Testing standard：The method of testing 4972-01 of the pH value of soil.
Process of the test：By the solidification Polluted Soil after maintenance, weigh wherein 50g samples and be placed in drying, constant weight to two at 105 DEG C
The error of secondary weighing value is less than ± 1%, and calculating obtains sample moisture content.Calculated according to moisture content and repair native dry weight, cross 1mm sieves simultaneously
The reparation soil sample that butt quality is 10g is weighed, is mixed with the stirring of 10g distilled water, solution ph is tested after standing 1h.Result of the test
As shown in table 4.
The acid-base value result of the test of table 4
The acid-base value of the solidification soil body is to evaluate an important indicator of curing agent curing heavy metal effect, and it is to repairing place
The secondary development scheme and degree utilized influence it is great.By the acid-base value result of the test of table 4, pass through embodiment 1-3 and contrast
The comparison of example 1 is understood, after addition curing agent, and the pH of the solidification soil body is significantly improved, and after conserving 28 days, the pH value for Polluted Soil is equal
Between 6~9, close to neutrality, be conducive to repairing the utilization in place, while the pH for solidifying the soil body in embodiment 4-7 is also significantly carried
After height, maintenance 28 days, for Polluted Soil pH value also between 6~9, close to neutral；Comparative example 2 relative to embodiment 3 by
In not carrying out activation process to slag, cause pH value slightly higher, but can also realize technical scheme substantially, if pH is held
High can be utilized to soil later development of continuing rising brings many problems.
Pass through the contrast of comparative example 1 and comparative example 2, it is found that it is molten that potassium dihydrogen phosphate activation bone meal can neutralize slag
The part OH solved-, the pH value of firming body is advantageously reduced, it is tended to be neutral；Further contrasted with table 3, it can be found that solid
Change the pH value of body reduces the fixation for also helping heavy metal in right amount.
Embodiment 10
Unconfined compression strength test
Testing standard：《Highway earthwork test rule JTG E40-2007》.
Process of the test：Carried out using YS H-2 type strain controlling formula unconfined compressive strengths instrument, axial strain speed 1%/
min.Under corresponding curing age, the unconfined compressive strength of solidified earth is tested, takes 3 Duplicate Samples to average again.Result of the test
As shown in table 5.
The unconfined compression strength test result (kPa) of table 5
| Soil sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 |
| a | 132.4 | 209.6 | 293.4 | 75.3 | 169.7 | 132.1 | 207.8 | 288.9 | 198.9 |
| b | 123.6 | 200.1 | 289.3 | 91.2 | 201.8 | 122.8 | 199.1 | 298.2 | 188.1 |
As shown in Table 5：Compared with the intensity of plain soil, the intensity of embodiment 1-7 and comparative example 2 substantially increases, and with
Curing agent volume increases and increased.Compared from embodiment 3 and comparative example 2, the standby medicament intensity side of the prepared from steel slag after activation
Face is with the obvious advantage, and the advantage in terms of intensity is also to influence the key factor of heavy metal toxicity leaching content.
Embodiment 11
To embodiment 1, embodiment 2, embodiment 3, comparative example 1, comparative example 2, embodiment 4, embodiment 5, embodiment 6 and reality
Apply the Polluted Soil progress phytotoxicity experiment (percentage of seedgermination experiment) that example 7 is conserved as described in Example 8：
Process of the test：Percentage of seedgermination experiment uses the soya bean to heavy metal in soil pollutant load more sensitivity, with
Its germination percentage carries out oxicity analysis as ecological index heavy metal and organic compound contaminated soil, is more conventional from life
State toxicological point weighs the important method of soil environment quality and soil pollution.Element after should conserving 28 days first is native and repaiies
Earth backing, it is standby that natural wind dry doubling crosses 2mm sieves.Each sample takes 4kg soil (element soil or each repair soil) dress basin, and (back cut diameter is
25cm, base diameter is 20cm, a height of 20cm), ridging height is 18cm；Soil in basin is irrigated to specific retention with distilled water and is
60%, keep specific retention constant thereafter and infiltration indoors is placed 2 days；Soya bean is finally sowed, soya bean sowing is left in depth 0.3cm
The right side, 100 are sowed per basin；Suitable soil moisture is periodically after planting kept using spray pattern, make seed indoors area without shade,
Germinateed under the conditions of 18-22 DEG C of room temperature, natural lighting.Germination percentage=(seed number is planted experimentally in chitting piece grain number/confession) × 100%.Examination
Test result as shown in table 6.
The percentage of seedgermination of table 6 (%)
Percentage of seedgermination experiment can reflect toxic action of the soil to plant.As can be seen from Table 6：Plain soil (contrast
Example 1, that is, be not added with the Polluted Soil of curing agent) in content of beary metal it is very high, have a strong impact on the Huang in the germination percentage of seed, Polluted Soil
Beans percentage of seedgermination is only 9% and 12%.And the curing agent in comparative example 2 then improves germination percentage to a certain extent, but carry
Limited extent is risen, is only capable of reaching 60% and 68% germination percentage, illustrates the present invention using solid made from not activated steel-making slag powder
There is certain stabilization in agent to the heavy metal in Polluted Soil, act on limited at that time；On the contrary, in 1-7 of the embodiment of the present invention
Curing agent reparation soil percentage of seedgermination 87% is all higher than in the case of a variety of volumes, highest even can reach 99%.It is real
The difference for applying example 1,2,3 and comparative example 1 shows that curing agent of the present invention repairs the autochthonal state close friend of Compound Heavy Metals, is conducive to
The activation process of the plant on place periphery and development of microorganisms growth after reparation, embodiment 3 and the comparative illustration of comparative example 2 to slag
Toxic action of the soil to plant can also be effectively reduced, the solidification stabilizing power of its heavy metal is reflected from side.
Claims (9)
1. a kind of curing agent for Compound Heavy Metals soil, it is characterised in that：It is made up of the material of following mass percent：
Steel-making slag powder 40-65%；Light calcined magnesia 5-25%；Phosphate activation bone meal 20-45%.
2. the curing agent according to claim 1 for Compound Heavy Metals soil, it is characterised in that：The steel-making slag powder is
Activated steel slag powder, is prepared from by following methods：
(1) will be one or more by broken sieving in the vessel slag after magnetic separation, open hearth slag and lectric furnace slag；
(2) drying materials to its moisture content for taking particle diameter to be less than 2mm in the product obtained is less than 2%；
(3) product obtained is ground and crossed after the sieve of 150-200 mesh, then through 500-700 DEG C of calcining 1-2h, obtains activating steel
Ground-slag.
3. the curing agent according to claim 1 for Compound Heavy Metals soil, it is characterised in that：The phosphate is lived
Change bone meal to be prepared from by following methods：
(1) phosphate solution that concentration is 0.01-0.05mol/L is prepared, by the ground 150-200 mesh sieves of bone meal, obtains levigate
Bone meal；
(2) by levigate bone meal and aluminum sulfate according to mass ratio 20-30:1 mixing, obtains levigate bone meal compound；
(3) it is 1 according to solid-to-liquid ratio by the levigate bone meal compound of gained and phosphate solution：10-15 ratio is mixed,
36-48h is stood after vibration stirring 10-15h at 20-30 DEG C, gelatinous precipitate is obtained；
(4) gelatinous precipitate is less than 2%, mistake that products therefrom is levigate using 100-250 DEG C airflow drying to its moisture content
150-200 mesh sieves, obtain phosphate activation bone meal.
4. it is used for the curing agent of Compound Heavy Metals soil according to claim 1 or 3, it is characterised in that：The bone meal
To steam the steamed bone meal that bone method is obtained.
5. the curing agent according to claim 4 for Compound Heavy Metals soil, it is characterised in that：The steamed bone meal by
Following methods are prepared from：Beast bone will be dried to be broken into after the block less than 5cm, 24h is steamed at 115-130 DEG C, then in 60-80
Dried at DEG C to constant mass, 0.5-1h is calcined at 140-160 DEG C, it is levigate after cooling to cross 150-200 mesh sieves.
6. the curing agent according to claim 5 for Compound Heavy Metals soil, it is characterised in that：The dry beast bone
For the one or more in pig bone, ox bone or fish-bone, calcium content is more than 30% after steam treatment, and phosphorus content is more than 14%.
7. the preparation method of the curing agent for being used for Compound Heavy Metals soil described in claim 1, it is characterised in that including such as
Lower step：Steel-making slag powder, light calcined magnesia and phosphate activation bone meal are mixed by weight percentage, using dry stirring
0.5-1h crosses 150-200 mesh sieves to after being well mixed, and obtains curing agent.
8. the application process of the curing agent for being used for Compound Heavy Metals soil described in claim 1, it is characterised in that：Will be described
Curing agent is mixed with heavy metal polluted soil, wherein, the hardener dose is the 5-15% of heavy metal polluted soil dry weight,
And the moisture content of the heavy metal polluted soil is 16-30%.
9. the application process of the curing agent according to claim 8 for Compound Heavy Metals soil, it is characterised in that：Institute
State particle diameter in heavy metal polluted soil and be less than 0.075mm granule content for 65-100%, wherein content of heavy metal lead is more than
2000mg/kg, heavy metal zinc content is more than 2000mg/kg, and heavy metal copper content is more than 2000mg/kg, and heavy metal nickel content is big
In 2000mg/kg.
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