CN106269836A - The solidification and stabilization method of organic polluted soil and the application in soil remediation thereof - Google Patents
The solidification and stabilization method of organic polluted soil and the application in soil remediation thereof Download PDFInfo
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- CN106269836A CN106269836A CN201610653459.0A CN201610653459A CN106269836A CN 106269836 A CN106269836 A CN 106269836A CN 201610653459 A CN201610653459 A CN 201610653459A CN 106269836 A CN106269836 A CN 106269836A
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- soil
- solidification
- organic polluted
- polluted soil
- stabilization method
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides the solidification and stabilization method of a kind of organic polluted soil and the application in soil remediation.The method comprising the steps of: soil breaking is removed plant residue and gravel by (1), measures maximum dry density and optimum moisture content；(2) liquid curing-agent accounting for soil quality 0.005%～0.1% is spilled into soil, overlay film precuring 20～30h after stirring；(3) soil after precuring adds the adsorbent of the inorganic adhesive, 0.5%～3% that account for soil quality 3%～10%, adds water and make to reach optimum moisture content；(4) after stirring compressing, obtain the firming body that compactness is 95%～98%；(5) maintenance 7～28 days it are put in standard curing box after firming body film coated.The method renovation of organic pollution soil of the present invention can be greatly decreased the usage amount of inorganic adhesive and water while ensureing solidification and stabilization effect and low rehabilitation cost, and process after the increase-volume amount of firming body can be greatly reduced.
Description
Technical field
The invention belongs to field of environment engineering technology, relate to a kind of method processing organic polluted soil, particularly to one
Plant the solidification and stabilization method of the organic polluted soil that increase-volume amount is low, water requirement is little and the application in soil remediation thereof.
Background technology
Along with adjustment and the quickening of urbanization process of Industry Structure, a large amount of chemical industry, pesticide producing enterprise is caused to remove
Moving, be much adjusted to inhabitation or commercial land etc. in original soil, these are left over place and have accumulated substantial amounts of organic contamination place；
It addition, China's Sudden Pollution Accident takes place frequently, the scene of the accident cleans out substantial amounts of organic polluted soil.Organic pollution exists
Soil is detained or is migrated in air, water body, soil by modes such as volatilization, leaching, diffusions, so to health and
Whole ecosystem brings harm greatly.
Solidification and stabilization technology is to be widely used in the fast repair technique of contaminated soil, and its mechanism of action is by various
Pollutant are changed into the most flowable solid or are closed in tight solid so that it is being changed into low dissolving by physics chemical action
Property, low migration and the process of hypotoxicity material, thus the beneficially final disposal of pollutant or recycling.Organic polluted soil
When solidification and stabilization processes, the inorganic material such as cement, Calx typically selected by solidification and stabilization material, inorganic material
Addition is generally the 20%～100% of contaminated soil quality, and the increase-volume amount causing firming body is relatively large, and then after increasing
The continuous difficulty disposed；It addition, the addition of water is generally the 30%～50% of dry solid weight summation during solidification and stabilization, water adds
Amount is big, and the theory of reparation sustainable with green is runed counter to.
Summary of the invention
In view of this, it is an object of the invention to provide the solidification of a kind of new organic polluted soil being different from prior art
Stabilization method and the application in soil remediation thereof.The method of the present invention has that increase-volume amount is low, water requirement in actual applications
Little advantage.
An aspect of of the present present invention provides the solidification and stabilization method of a kind of organic polluted soil, and it includes step:
(1) organic polluted soil is crushed, remove plant residue and gravel, and measure the maximum of organic polluted soil
Dry density and the optimum moisture content of correspondence；
(2) by after liquid curing-agent dilute with water, uniformly it is spilled in the soil that step (1) processed, after being sufficiently stirred for
Overlay film, in a loose state precuring 20～30h, the active component of described liquid curing-agent is sulfonated oil, described liquid curing
The addition of agent is the 0.005%～0.1% of soil quality；
(3) soil after precuring adds inorganic adhesive and adsorbent, add water and make soil mixture reach
Good moisture content；The addition of described inorganic adhesive is the 3%～10% of soil quality, and the addition of described adsorbent is soil
The 0.5%～3% of quality；
(4) being stirred by the soil mixture of step (3) gained, put in die trial compressing, obtaining compactness is
The firming body of 95%～98%；
(5) firming body is deviate from die trial, after being coated with plastic sheeting, be put in standard curing box maintenance 7～28 days.
In step (1), the described maximum dry density of mensuration organic polluted soil and the optimum moisture content of correspondence preferably employ
Heavy compaction instrument is measured.
In step (2), described liquid curing-agent dilute with water can be operated by this area routine, in general,
Liquid curing-agent can re-use after being diluted by a certain percentage with water before use, and described ratio is those skilled in the art's roots
It is easily mastered according to being actually needed, is not particularly limited, as long as the moisture content of soil is after liquid curing-agent is spilled into
Good moisture content；
The time of described precuring is preferably 24h；
The active component of described liquid curing-agent is sulfonated oil, and the content of wherein said sulfonated oil is conventional the containing in this area
Amount；
The addition of described liquid curing-agent is preferably the 0.02% of soil quality.
In step (3), described inorganic adhesive is that this area is conventional, such as cement, Calx etc., it is preferable that described inorganic glue
Stick is cement；
The addition of described inorganic adhesive is preferably the 6% of soil quality；
Described adsorbent is that this area is conventional, such as activated carbon, black wood charcoal or organic clay etc., it is preferable that described adsorbent is
Activated carbon；
The addition of described adsorbent is preferably the 1% of soil quality.
In step (4), described compressing method is that this area is conventional, it is preferable that described compressing be use anti-
Power framework and hydraulic jack are compressing by soil mixture.
In step (5), described standard curing box is described in the routine of this area, it is preferable that the temperature in described standard curing box
Degree controls at 20 ± 2 DEG C, and humid control is 95%.
Another aspect of the present invention provides the solidification and stabilization method of aforementioned organic polluted soil in soil remediation engineering
Application.
The present invention has a following beneficial effect:
The solidification and stabilization method renovation of organic pollution soil using the present invention to provide can ensure solidification and stabilization effect
And the usage amount of inorganic adhesive and water while low rehabilitation cost, is greatly decreased, and process after firming body can be greatly reduced
Increase-volume amount.Therefore, the follow-up disposal of the present invention beneficially firming body meet the theory of green sustainable reparation.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the inventive method.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in further detail.
As it is shown in figure 1, the present invention provides the solidification and stabilization method of a kind of organic polluted soil, it includes step:
(1) organic polluted soil is crushed, remove plant residue and gravel, and measure the maximum of organic polluted soil
Dry density and the optimum moisture content of correspondence；
(2) by after liquid curing-agent dilute with water, uniformly it is spilled in the soil that step (1) processed, after being sufficiently stirred for
Overlay film, in a loose state precuring 20～30h (in figure as a example by 24h), the active component of described liquid curing-agent is sulfonation
Oil, the addition of described liquid curing-agent is the 0.005%～0.1% of soil quality；
(3) soil after precuring adds inorganic adhesive and adsorbent, add water and make soil mixture reach
Good moisture content；The addition of described inorganic adhesive is the 3%～10% of soil quality, and the addition of described adsorbent is soil
The 0.5%～3% of quality；
(4) being stirred by the soil mixture of step (3) gained, put in die trial compressing, obtaining compactness is
The firming body of 95%～98%；
(5) firming body is deviate from die trial, after being coated with plastic sheeting, be put in standard curing box maintenance 7～28 days.
Afterwards, the organic polluted soil processed can be carried out final disposal.
Embodiment 1
Gathering plant area of Beijing coke-oven plant table earth sample, polycyclic aromatic hydrocarbon content is 350mg/kg, by the soil breaking of bulk, goes
Except rubble and the plant and animal residues of bulk, measuring its moisture content is 9%.The maximum dry that employing heavy compaction instrument measures this soil is close
Degree is 1.8g/cm3, corresponding optimum moisture content is 14%.By liquid curing-agent (active component is sulfonated oil) with water by certain
After dilution proportion, being uniformly spilled in soil, the addition of liquid curing-agent is the 0.02% of organic polluted soil quality, water addition
For soil quality 5%；Use clean slurry blender to put in plastic bag after mixed soil sample being sufficiently stirred for, support in a loose state
Protect 24h.Being subsequently adding cement and activated carbon, the addition of cement is the 6% of organic polluted soil quality, the addition of activated carbon
For organic polluted soil quality 1%.Solid mixture is stirred, puts in die trial, use reaction frame and hydraulic pressure thousand
Jin top is compressing by solid mixture, obtains the firming body that compactness is 98%.It is put into standard curing box after the demoulding cladding
Carrying out maintenance in (temperature 20 ± 2 DEG C, humidity 95%), curing time is 28d.Measure the unconfined compressive strength of firming body, adopt
With " Leaching leaching method sulfonitric method " (HJ/T299-2007), firming body is carried out leaching test.Firming body after testing
The unconfined compressive strength of maintenance 7d and 28d is respectively 1.9MPa and 3.8MPa, and in leachate, benzo [a] pyrene concentration is less than " danger
Danger refuse judging standard leaching characteristic identification " standard value in (GB5085.3 2007).
Comparative example 1
Gathering plant area of Beijing coke-oven plant table earth sample, polycyclic aromatic hydrocarbon content is 350mg/kg, by the soil breaking of bulk, goes
Except rubble and the plant and animal residues of bulk, measuring its moisture content is 9%.Cement and activated carbon, cement is added in contaminated soil
Addition is organic polluted soil quality 20%, the addition of activated carbon is the 1% of organic polluted soil quality, adding of water
Dosage is the 30% of solid gross mass, puts in die trial, supports in standard curing box (temperature 20 ± 2 DEG C, humidity 95%)
Protecting, curing time is 28d.Measure the unconfined compressive strength of firming body, use " Leaching leaching method sulfonitric method "
(HJ/T299-2007) firming body is carried out leaching test.The unconfined compressive strength of firming body maintenance 7d and 28d is after testing
1.5MPa and 3.6MPa, in leachate, benzo [a] pyrene concentration is less than " hazardous waste judging standard leaching characteristic identification "
Standard value in (GB5085.3 2007).The partial results of embodiment 1 and comparative example 1 is shown in Table 1.
Table 1 embodiment 1 and the process comparing result of comparative example 1
By the comparison of table 1, the solidification and stabilization method using the present invention to provide processes organic polluted soil, can be
Ensure solidification and stabilization effect and low rehabilitation cost while, the usage amount of inorganic adhesive and water, and energy are greatly decreased
Process after the increase-volume amount of firming body is enough greatly reduced.Therefore, the follow-up disposal of the present invention beneficially firming body and meet green can
The theory persistently repaired.
Particular embodiments described above, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail
Describe in detail bright it should be understood that the foregoing is only the specific embodiment of the present invention, be not limited to the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in the protection of the present invention
Within the scope of.
Claims (8)
1. the solidification and stabilization method of an organic polluted soil, it is characterised in that include step:
(1) organic polluted soil is crushed, remove plant residue and gravel, and the maximum dry measuring organic polluted soil is close
Degree and the optimum moisture content of correspondence；
(2) by after liquid curing-agent dilute with water, uniformly it is spilled in the soil that step (1) processed, is sufficiently stirred for rear overlay film,
Precuring 20～30h in a loose state, the active component of described liquid curing-agent is sulfonated oil, adding of described liquid curing-agent
Dosage is the 0.005%～0.1% of soil quality；
(3) soil after precuring adds inorganic adhesive and adsorbent, add water and make soil mixture reach most preferably to contain
Water rate；The addition of described inorganic adhesive is the 3%～10% of soil quality, and the addition of described adsorbent is soil quality
0.5%～3%；
(4) being stirred by the soil mixture of step (3) gained, put in die trial compressing, obtaining compactness is 95%
～the firming body of 98%；
(5) firming body is deviate from die trial, after being coated with plastic sheeting, be put in standard curing box maintenance 7～28 days.
The solidification and stabilization method of organic polluted soil the most according to claim 1, it is characterised in that in step (1), institute
The optimum moisture content stating the maximum dry density and correspondence that measure organic polluted soil uses heavy compaction instrument to be measured.
The solidification and stabilization method of organic polluted soil the most according to claim 1, it is characterised in that in step (2),
The time of described precuring is 24h；
The addition of described liquid curing-agent is the 0.02% of soil quality.
The solidification and stabilization method of organic polluted soil the most according to claim 1, it is characterised in that in step (3),
Described inorganic adhesive is cement；
The addition of described inorganic adhesive is the 6% of soil quality.
The solidification and stabilization method of organic polluted soil the most according to claim 1, it is characterised in that in step (3),
Described adsorbent is activated carbon；
The addition of described adsorbent is the 1% of soil quality.
The solidification and stabilization method of organic polluted soil the most according to claim 1, it is characterised in that in step (4), institute
Stating compressing is to use reaction frame and hydraulic jack that soil mixture is compressing.
The solidification and stabilization method of organic polluted soil the most according to claim 1, it is characterised in that in step (5), institute
Stating the temperature in standard curing box to control at 20 ± 2 DEG C, humid control is 95%.
8. the solidification and stabilization method of the organic polluted soil described in any one of claim 1～7 is in soil remediation engineering
Application.
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| CN201610653459.0A CN106269836B (en) | 2016-08-10 | 2016-08-10 | The solidification and stabilization method of organic polluted soil and its application in soil remediation |
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| CN201610653459.0A CN106269836B (en) | 2016-08-10 | 2016-08-10 | The solidification and stabilization method of organic polluted soil and its application in soil remediation |
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| CN106269836A true CN106269836A (en) | 2017-01-04 |
| CN106269836B CN106269836B (en) | 2019-10-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108707460A (en) * | 2018-06-15 | 2018-10-26 | 中国铁道科学研究院铁道建筑研究所 | A kind of soil-solidified-agent and preparation method thereof |
| FR3101557A1 (en) * | 2019-10-07 | 2021-04-09 | Holcim Technology Ltd | PROCESS FOR TREATING A SOIL POLLUTED BY HYDROCARBONS, IN PARTICULAR POLYCYCLIC AROMATIC HYDROCARBONS |
| CN113732050A (en) * | 2021-09-13 | 2021-12-03 | 中冶节能环保有限责任公司 | Contaminated soil solidification and stabilization treatment system and process |
| CN114226441A (en) * | 2021-12-08 | 2022-03-25 | 湖北工业大学 | Method for solidifying heavy metal polluted soil and preventing secondary pollution by polyvinyl alcohol |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108707460A (en) * | 2018-06-15 | 2018-10-26 | 中国铁道科学研究院铁道建筑研究所 | A kind of soil-solidified-agent and preparation method thereof |
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| CN113732050A (en) * | 2021-09-13 | 2021-12-03 | 中冶节能环保有限责任公司 | Contaminated soil solidification and stabilization treatment system and process |
| CN114226441A (en) * | 2021-12-08 | 2022-03-25 | 湖北工业大学 | Method for solidifying heavy metal polluted soil and preventing secondary pollution by polyvinyl alcohol |
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| CN106269836B (en) | 2019-10-22 |
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