CN102295933A - Special stabilizing agent for chromium polluted soil - Google Patents
Special stabilizing agent for chromium polluted soil Download PDFInfo
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- CN102295933A CN102295933A CN2011101829193A CN201110182919A CN102295933A CN 102295933 A CN102295933 A CN 102295933A CN 2011101829193 A CN2011101829193 A CN 2011101829193A CN 201110182919 A CN201110182919 A CN 201110182919A CN 102295933 A CN102295933 A CN 102295933A
- Authority
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- China
- Prior art keywords
- chromium
- stabilizing agent
- polluted soil
- soil
- slag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002689 soil Substances 0.000 title claims abstract description 57
- 239000003381 stabilizer Substances 0.000 title claims abstract description 19
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title abstract description 33
- 229910052804 chromium Inorganic materials 0.000 title abstract description 21
- 239000011651 chromium Substances 0.000 title abstract description 21
- 239000002893 slag Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 8
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010457 zeolite Substances 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 6
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims abstract description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 6
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229920005610 lignin Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 230000006641 stabilisation Effects 0.000 abstract description 5
- 238000011105 stabilization Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000011282 treatment Methods 0.000 abstract description 2
- 239000011398 Portland cement Substances 0.000 abstract 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 abstract 1
- 229960002089 ferrous chloride Drugs 0.000 abstract 1
- 239000002440 industrial waste Substances 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 230000002829 reductive effect Effects 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 238000002386 leaching Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 229910001430 chromium ion Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KSPIHGBHKVISFI-UHFFFAOYSA-N Diphenylcarbazide Chemical compound C=1C=CC=CC=1NNC(=O)NNC1=CC=CC=C1 KSPIHGBHKVISFI-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005186 environmental transport Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a special stabilizing agent for chromium polluted soil. The stabilizing agent comprises 30-60% of portland cement clinker, 30-60% of steel slag, 2-5% of ferrous chloride, 1-8% of zeolite, 1-3% of solid soluble glass, and 0-0.5% of water reducer, wherein a sum of the weight percentages of the raw materials is 100%. A free water content of each raw material is not higher than 2%; the steel slag is individually ground to a Przibram specific surface area of 390-450m<2>/kg, and other materials are mixed and ground to a Przibram specific surface area of 300-350 m<2>/kg; and the steel slag and other materials are mixed together. The components of the stabilizing agent are market sold products or industrial waste residues. The stabilizing agent has low production costs and little usage amount in chromium polluted soil stabilization / solidification treatments, and can effectively lower hexavalent chromium and total chromium dissolving out form the soil; and the stabilized soil has high strength, so as to realize resource utilization of the chromium polluted soil.
Description
Technical field
The invention belongs to environmental technology field, the stablizer of particularly a kind of chromium-polluted soil disposal and recycling.
Background technology
Chromium and compound thereof are the requisite starting material of industry such as metallurgy, plating, process hides, printing and dyeing in industrial every field widespread use, have produced the soil of a large amount of pollutions of chromium thus.The toxicity of chromium is mainly from sexavalent chrome, and is very harmful to human body, is one of internationally recognized three kinds of carcinogenic metal objects.Chromium-polluted soil is disposed or repaired, and is the key subjects of environment protection.
In chromium-polluted soil, sexavalent chrome does not exist only in the surface of soil particle, the inside that is present in a material simultaneously, there are the problem of a loose contact in a soil sexavalent chrome that material is inner and treatment media, thereby the disposal of chromium-polluted soil is more much more difficult than the disposal of pollution of chromium liquid.
In chromium-polluted soil reparation and improvement method, chemical reduction and chemical fixationization are two kinds of methods commonly used wherein.Chemical reduction method is a trivalent chromium with hexavalent chrome reduction, reduce chromium transport property in environment, thereby reduce the harm of pollution of chromium, but the sexavalent chrome of soil inside is difficult to effectively to contact product with reductive agent, and reduction reaction takes place, and the excess reductive agent is easy to be flushed away or by other material oxidation, makes that chromic stripping rebounds in time in the contaminated soil.The chemical fixation method fixes wherein chromium by gelling material such as cement and mixing with soil, makes chromium environmental transport and transfer no longer towards periphery, and this method not only processing cost is higher, and the effect of disposing also awaits further raising.
In existing chromium-polluted soil reparation or method of disposal, the present major objective of paying close attention to of people is to make the leaching of the chromium-polluted soil chromium after the disposal be reduced to the index that people require, also promptly make it environmental sound, and the research that chromium-polluted soil is realized the recycling aspect also seldom.
Realize the utilization of resources of chromium-polluted soil, one of its approach is that chromium-polluted soil is carried out after stabilization/curing disposal, not only chromium leaches the index that concentration will be reduced to requirement, and to make it to have higher intensity, thereby can obtain to utilize aspect building materials, this depends on the development and application of the stabilization/cure formulations of chromium-polluted soil special use.
Summary of the invention
The stablizer that the purpose of this invention is to provide a kind of chromium-polluted soil special use, this stablizer can effectively reduce sexavalent chrome and the stripping of chromium always in the contaminated soil, and do not rebound in time, the soil after stablizing has certain intensity, can be used for purposes such as roadbed brick.This stablizer can also utilize the waste residue-slag of Iron And Steel Industry, has economic environmental protection characteristics.
For realizing above target, the present invention adopts following technical solution:
A kind of chromium-polluted soil is stabilizing agent specially used, it is characterized in that it comprises following composition material and part by weight: Portland clinker 30%-60%; Slag 30%-60%; Iron protochloride 2%-5%; Zeolite 1-8%; Solid water glass 1-3%; Water reducer 0-0.5%.Above-mentioned raw materials weight percent sum is 100%, and each raw material free water content is not higher than 2%, and the independent grinding of slag is to Blain specific surface 390-450m
2/ Kg, other raw material mix the back grinding to Blain specific surface 300-350m
2/ Kg, both remix are even then.
Chromium-polluted soil of the present invention is stabilizing agent specially used, and described slag is bessemer furnace slag or electric furnace slag, meets the YB/T022 technical requirements.The rock of zeolite a kind of hydrous alumino silicates mineral based on alkali or alkaline-earth metal that to be tuff form through the surrounding medium effect meets the GB/T2847 technical requirements.Water reducer is sodium lignosulfonate or calcium lignin sulphonate pulvis.
Chromium-polluted soil of the present invention is stabilizing agent specially used, and chromium-polluted soil is played chemical reduction and chemosetting effect simultaneously.Iron protochloride has reductive action preferably to the sexavalent chrome in the soil, and contains ferrously in the slag, is wrapped in the slag glass, can play reductive action in hydration process constantly, is difficult for running off in soil.Portland clinker mainly provides gelling, and complementary pectisation or excitations such as slag, zeolite, solid water glass, make soil be formed with the adhesive bond of intensity, hydrated product filling soil intergranular space, soil particle is wrapped up, the shutoff ion oozes out passage, prevents that also reductive agent runs off.And hydrated product itself also has absorption, parcel and solid solution effect to chromium ion.Zeolite then has stronger adsorption simultaneously, and is favourable to the sexavalent chrome in the absorption soil.Water reducer is then strengthened the uniform distribution of stablizer in soil and is effectively contacted.Each component acting in conjunction in the stablizer effectively reduces sexavalent chrome and the stripping of chromium always in the soil, gives its higher mechanical strength simultaneously.
Chromium-polluted soil of the present invention is stabilizing agent specially used when being applied to chromium-polluted soil and disposing, and directly admixture about 30% in soil after stirring, is spread out and put on compacting, makes it fixed in a short time, or adds and be pressed into fragment of brick.
Each stabilizing agent specially used component of chromium-polluted soil of the present invention is commercial goods or industrial residue, and cost of manufacture is relatively low.When being used for the chromium-polluted soil processing, can effectively prevent the stripping of chromium ion in the soil, not rebound in time, and the concretion body strength height, water resistance is good, can be used for purposes such as roadbed construction.
Embodiment
The embodiment that provides below in conjunction with the contriver makes further detailed description to the present invention.
Table 1 is one group of the present invention (7) embodiment.Constitutive material and the weight percent thereof of each embodiment have been listed in the table 1.Constitutive material is Portland clinker, slag, iron protochloride, zeolite, solid water glass, water reducer (sodium lignosulfonate or calcium lignin sulphonate), and each constitutive material free water content is not higher than 2%, and the weight percent sum is 100%.Slag is levigate separately, and it is levigate that other raw material mixes the back, and both remix are even then.Also listed the specific surface area behind the independent grinding of slag in the table 1, and the specific surface area behind other raw material combined grinding such as grog.
The stabilizing agent specially used embodiment of table 1 chromium-polluted soil
Table 2 is used for the effect of stabilization/curing chromium-polluted soil for each embodiment in the table 1.Total chrome content is 15306 mg/kg in the used chromium-polluted soil, the stablizer volume is 30%, after stirring, with reference to T0843-2009 " stabilized with inorganic binder material test specimen making method " compacting sample, carry out ruggedness test by T0805-1994 " stabilized with inorganic binder material unconfined compressive strenght test method ", with reference to HJT 300-2007 " solid waste-leaching toxicity leaching method-hac buffer method " soil after stable is carried out toxicity (total chromium and sexavalent chrome) leaching test, sexavalent chrome leaches concentration and measures by standard GB 7467-87 " the chromic mensuration diphenyl carbazide spectrophotometry of solid waste ", and total chromium leaches concentration and measures by standard GB/T 7466-1987 " potassium permanganate-diphenylcarbazide beam split light method ".
As seen from Table 2, the stabilizing agent specially used effect of chromium-polluted soil of the present invention is good, and 7 days of each embodiment and 28 days sexavalent chromes leach concentration all less than 0.47mg/l, and total chromium leaches concentration all less than 0.60mg/l.And the soil unconfined compression strength after stabilization/curing 7 days is up to more than 9.0 MPa, and its mechanical property satisfied the requirement of building materials purposes such as roadbed construction up to more than the 10.06MPa in 28 days.
In addition, respectively implement each component in the table 1 and be commercial goods or industrial residue, and the industrial residue large usage quantity, thereby cost of manufacture is relatively low, has economic environmental protection characteristics.
The stabilizing agent specially used effect of chromium-polluted soil among each embodiment of table 2
Claims (4)
1. a chromium-polluted soil is stabilizing agent specially used, it is characterized in that comprising following raw material: 30%-60% Portland clinker, 30%-60% slag, 2%-5% iron protochloride, 1-8% zeolite, 1-3% solid water glass and 0-0.5% water reducer; Above raw material is weight percentage, and each raw material free water content is not higher than 2%, and the independent grinding of slag is to Blain specific surface 390-450m
2/ Kg, other raw material mix the back grinding to Blain specific surface 300-350m
2/ Kg, both remix are even then, and it is stabilizing agent specially used to obtain chromium-polluted soil.
2. chromium-polluted soil according to claim 1 is stabilizing agent specially used, it is characterized in that: described slag is bessemer furnace slag or electric furnace slag, meets the YB/T022 technical requirements.
3. chromium-polluted soil according to claim 1 is stabilizing agent specially used, it is characterized in that: the rock of described zeolite a kind of hydrous alumino silicates mineral based on alkali or alkaline-earth metal that to be tuff form through the surrounding medium effect meets the GB/T2847 technical requirements.
4. chromium-polluted soil according to claim 1 is stabilizing agent specially used, it is characterized in that: described water reducer is sodium lignosulfonate or calcium lignin sulphonate pulvis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110182919 CN102295933B (en) | 2011-07-01 | 2011-07-01 | Special stabilizing agent for chromium polluted soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110182919 CN102295933B (en) | 2011-07-01 | 2011-07-01 | Special stabilizing agent for chromium polluted soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102295933A true CN102295933A (en) | 2011-12-28 |
| CN102295933B CN102295933B (en) | 2013-06-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110182919 Expired - Fee Related CN102295933B (en) | 2011-07-01 | 2011-07-01 | Special stabilizing agent for chromium polluted soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102295933B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498044A (en) * | 2014-11-28 | 2015-04-08 | 浙江卓锦工程技术有限公司 | Hexavalent chromium-contaminated soil remediation agent and preparation method thereof |
| CN105924029A (en) * | 2016-04-21 | 2016-09-07 | 张伟 | Liquid cement additive for reducing content of water-soluble Cr<6+> in cement |
| CN107267151A (en) * | 2017-07-27 | 2017-10-20 | 蒋奇晋 | A kind of soil conditioner and preparation method thereof |
| CN107586067A (en) * | 2017-08-23 | 2018-01-16 | 侯玉德 | A kind of chromium-polluted soil curing agent and preparation method thereof |
| CN107721255A (en) * | 2017-10-20 | 2018-02-23 | 桂林市春晓环保科技有限公司 | A kind of chromium-polluted soil curing agent and preparation method thereof |
| CN110316992A (en) * | 2019-04-04 | 2019-10-11 | 清华大学 | A kind of steel slag base cement Cr VI solid reductant |
| CN110387243A (en) * | 2019-07-26 | 2019-10-29 | 河南省明创环境科技有限公司 | A kind of medicament and method for repairing water-bearing layer heavy-metal contaminated soil |
| CN114316999A (en) * | 2021-12-31 | 2022-04-12 | 北京润鸣环境科技有限公司 | Soil solidification and stabilization agent and soil solidification and stabilization method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002348573A (en) * | 2001-03-13 | 2002-12-04 | Alpha Green:Kk | Greening and soil-stabilizing material having unsolubilizing property of heavy metals and engineering method for blowing seed to thick-layer substrate, method for stabilizing soil and method for treating polluted soil by each using the same material |
| CN1623696A (en) * | 2004-11-05 | 2005-06-08 | 华南理工大学 | Process for reducing pollution of hexa covalent chromium ion |
-
2011
- 2011-07-01 CN CN 201110182919 patent/CN102295933B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002348573A (en) * | 2001-03-13 | 2002-12-04 | Alpha Green:Kk | Greening and soil-stabilizing material having unsolubilizing property of heavy metals and engineering method for blowing seed to thick-layer substrate, method for stabilizing soil and method for treating polluted soil by each using the same material |
| CN1623696A (en) * | 2004-11-05 | 2005-06-08 | 华南理工大学 | Process for reducing pollution of hexa covalent chromium ion |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498044A (en) * | 2014-11-28 | 2015-04-08 | 浙江卓锦工程技术有限公司 | Hexavalent chromium-contaminated soil remediation agent and preparation method thereof |
| CN105924029A (en) * | 2016-04-21 | 2016-09-07 | 张伟 | Liquid cement additive for reducing content of water-soluble Cr<6+> in cement |
| CN107267151A (en) * | 2017-07-27 | 2017-10-20 | 蒋奇晋 | A kind of soil conditioner and preparation method thereof |
| CN107267151B (en) * | 2017-07-27 | 2020-01-14 | 蒋奇晋 | Soil conditioner and preparation method thereof |
| CN107586067A (en) * | 2017-08-23 | 2018-01-16 | 侯玉德 | A kind of chromium-polluted soil curing agent and preparation method thereof |
| CN107721255A (en) * | 2017-10-20 | 2018-02-23 | 桂林市春晓环保科技有限公司 | A kind of chromium-polluted soil curing agent and preparation method thereof |
| CN110316992A (en) * | 2019-04-04 | 2019-10-11 | 清华大学 | A kind of steel slag base cement Cr VI solid reductant |
| CN110316992B (en) * | 2019-04-04 | 2020-09-01 | 清华大学 | Steel slag-based cement hexavalent chromium solid reducing agent |
| CN110387243A (en) * | 2019-07-26 | 2019-10-29 | 河南省明创环境科技有限公司 | A kind of medicament and method for repairing water-bearing layer heavy-metal contaminated soil |
| CN114316999A (en) * | 2021-12-31 | 2022-04-12 | 北京润鸣环境科技有限公司 | Soil solidification and stabilization agent and soil solidification and stabilization method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102295933B (en) | 2013-06-05 |
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Granted publication date: 20130605 |