CN110014036A - A kind of method that heat strengthens assisted in situ chemical oxidation renovation of organic pollution soil - Google Patents
A kind of method that heat strengthens assisted in situ chemical oxidation renovation of organic pollution soil Download PDFInfo
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- CN110014036A CN110014036A CN201910331950.5A CN201910331950A CN110014036A CN 110014036 A CN110014036 A CN 110014036A CN 201910331950 A CN201910331950 A CN 201910331950A CN 110014036 A CN110014036 A CN 110014036A
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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
- B09C1/06—Reclamation of contaminated soil thermally
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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
- B09C2101/00—In situ
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- Soil Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of methods that heat strengthens assisted in situ chemical oxidation renovation of organic pollution soil, and this method comprises the following steps: 1) the contaminated soil smooth compacting after mixing of medicament and surface layer 300mm thickness will be repaired with rotary cultivator；2) it is layouted using GPS positioning instrument combination triangulation method, parameter of layouting, which guarantees to repair within the scope of medicament dilation angle, all covers restoring area；3) liquid medicine will be repaired in institute's cloth point using high-pressure rotary-spray injection device to inject in situ；4) heating device is installed in medicine-pouring hole, contaminated soil is heated to 30 DEG C~40 DEG C and keeps design temperature, until target contaminant is sufficiently reacted with medicament is repaired, so that target pollutant concentration, which is reduced to, repairs target value or less.Restorative procedure of the present invention is at low cost, applied widely, solves the problem of renovation of organic pollution soil common technology original position thermal desorption system energy consumption is high, and chemical oxidization method remediation efficiency is low, effect is poor, is restricted by low temperature environment.
Description
Technical field
It is specifically a kind of that assisted in situ chemical oxygen is strengthened by heat the present invention relates to organic polluted soil Treatment process field
Change the method for renovation of organic pollution soil.
Background technique
In recent years, because economy develops rapidly, the industrial structure continues to optimize upgrading, promotes the chemical industry enterprise of substantial pollution
It moves successively from flourishing city to remote districts, left a large amount of organic pollutants influence utilization of the government to soil, limitation
The development in city, while also security risk is constituted to the existence of soil ecosystem and the mankind.
Currently used organic polluted soil recovery technique is divided into in-situ immobilization and two class of showering.Showering is because relating to
And clear digging, transport, strange land reparation/disposition or the processing of original place dystopy of contaminated soil, it is be easy to cause the leakage and diffusion of pollutant,
And disposal process need to carry out keeping under strict supervision close inspection, it is upper to management more demanding.In-situ immobilization is not related to deep pit digging and supporting, foundation pit
The foundation constructions such as precipitation and sealing effectively avoid the probability for reducing safety accident generation while secondary pollution.Organic contamination
The based technique for in-situ remediation of soil receives favor at home in recent years.
The technology of in-situ immobilization organic polluted soil mainly includes thermal desorption technology in situ and in situ chemical oxidation skill at present
Art.Thermal desorption technology strong flexibility in situ, it is easy to operate, labour is saved, but it needs contaminated soil being heated to pollutant
Near boiling point, energy consumption is high, causes rehabilitation cost high.In situ chemical oxidation technology is by adding oxygen into contaminated soil
Agent makes pollutant in place be converted into non-toxic or low-toxic substance, and rehabilitation cost is lower, but medicament and dirt are repaired in this method
It contaminates object and the suitable temperature of chemical reaction needs occurs, paradoxical reaction is slow in actual use, is not thorough, and is unable to satisfy under low temperature environment
Soil remediation engineering.Therefore the organic polluted soil based technique for in-situ remediation tool that a kind of rehabilitation cost is low, applied widely is studied
It is significant.
Summary of the invention
The purpose of the present invention is to provide it is a kind of heat strengthen assisted in situ chemical oxidation renovation of organic pollution soil method,
The restorative procedure is at low cost, applied widely, can solve in existing organic polluted soil based technique for in-situ remediation rehabilitation cost it is high,
The technical issues of being restricted by natural environment.
To achieve the goals above, the present invention provides the following technical scheme that
The method that a kind of heat of the present invention strengthens assisted in situ chemical oxidation renovation of organic pollution soil, comprising the following steps:
Step (1) removes contaminated soil surface irregularities, and the Polluted Soil of medicament and surface layer 300mm thickness will be repaired with rotary cultivator
Earth smooth compacting after mixing；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair medicament dilation angle model
Enclose interior all covering restoring areas；
Step (3) is injected in institute's cloth point using high-pressure rotary-spray injection device and repairs medicament；
Step (4) installs heating device in medicine-pouring hole, and fills the sky between medicine-pouring hole and heating device with the grains of sand
Gap；
Step (5) opens heating device, contaminated soil is heated to 30 DEG C~40 DEG C and keeps this temperature, until
Target contaminant is sufficiently reacted with medicament is repaired, so that target pollutant concentration, which is reduced to, repairs target value or less.
In step (3) of the present invention, the injection pressure of high-pressure rotary-spray injection device is 25Mpa~30Mpa, repairs medicament
Dilation angle is 1m~3m.
In step (1) of the present invention and step (3), the reparation medicament used is sodium hydroxide and sodium peroxydisulfate composition
Aqueous solution；The amount of application for repairing medicament is the 4%~10% of target repairing polluted soil quality.
In sodium hydroxide and sodium peroxydisulfate composition solution of the present invention, the dosage of sodium hydroxide is sodium peroxydisulfate
The 2%~8% of quality；The mass concentration of sodium hydroxide and sodium peroxydisulfate composition solution is 20%.
In step (4) of the present invention and step (5), heating device is electric drive heating rod or heat recirculated water driving heating
One kind of pipe.
The method of the present invention compared with prior art, has the following beneficial effects:
(1) heat is strengthened into auxiliary system and in situ chemical oxidation technology reasonable combination, solves in situ chemical oxidation technology
Limited in use process by low temperature environment, reaction speed is slow and repairs halfway problem, by improved in-situ chemical oxygen
Change technology remediation efficiency is high, repairs thoroughly and is not limited by seasonal variations and regional climate.
(2) present invention, which repairs medicament, only needs a little heat that can chemically react with target contaminant, by pollutant point
Solution is nontoxic/less toxic small molecule, reaches reparation target, saves a large amount of thermal energy using thermal desorption technology in situ than single, makes to have
Machine contaminated soil remediation cost is greatly reduced, so that more organic polluted soils have an opportunity to repair early.
(3) the high-pressure rotary-spray injection technology injection pressure that the present invention uses is up to 30Mpa, so that repairing medicament in the soil
Dilation angle and diffusion effect dramatically increase, be suitable for high, medium and low permeable formation.
Specific embodiment
Technical solution of the present invention is described further combined with specific embodiments below, so that those skilled in the art
The present invention can be better understood and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment 1
For the present embodiment for repairing organo-chlorine pesticide six six six contaminated soil, concrete operations are as follows:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, will repair medicament and surface layer with rotary cultivator
The smooth compacting after mixing of the contaminated soil of 300mm thickness, the dosage for repairing medicament are the 10% of contaminated soil quality,
The reparation medicament be sodium hydroxide and sodium peroxydisulfate composition solution, mass concentration 20%, the sodium hydroxide
Dosage is the 2% of sodium peroxydisulfate quality；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair medicament dilation angle model
Enclose interior all covering restoring areas；
Step (3) uses high-pressure rotary-spray injection device to repair medicine in institute's cloth point with the pressure injection of 25Mpa~30Mpa
Agent, the injection rate for repairing medicament are the 10% of contaminated soil quality, repair the preparation of medicament and the reparation medicament of step (1)
It is identical；
Step (4) installs heating device in medicine-pouring hole, and fills the sky between medicine-pouring hole and heating device with the grains of sand
Gap, the heating device use electric drive heating rod；
Step (5) opens heating device, soil is heated to 30 DEG C, maintains this temperature maintenance after 40 days to soil
Middle target contaminant is tested and analyzed, and calculates the degradation rate of target contaminant according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Through testing and analyzing, the degradation rate of six six six is 92.12% in contaminated soil.
Embodiment 2
For the present embodiment for repairing organo-chlorine pesticide six six six contaminated soil, concrete operations are as follows:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, will repair medicament and surface layer with rotary cultivator
The smooth compacting after mixing of the contaminated soil of 300mm thickness, the dosage for repairing medicament are the 4% of contaminated soil quality,
The reparation medicament be sodium hydroxide and sodium peroxydisulfate composition solution, mass concentration 20%, the sodium hydroxide
Dosage is the 4% of sodium peroxydisulfate quality；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair medicament dilation angle model
Enclose interior all covering restoring areas；
Step (3) uses high-pressure rotary-spray injection device to repair medicine in institute's cloth point with the pressure injection of 25Mpa~30Mpa
Agent, the injection rate for repairing medicament are the 4% of contaminated soil quality, repair the preparation of medicament and the reparation medicament of step (1)
It is identical；
Step (4) installs heating device in medicine-pouring hole, and fills the sky between medicine-pouring hole and heating device with the grains of sand
Gap, the heating device use electric drive heating rod；
Step (5) opens heating device, soil is heated to 40 DEG C, maintains this temperature maintenance after 40 days to soil
Middle target contaminant is tested and analyzed, and calculates the degradation rate of target contaminant according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Through testing and analyzing, the degradation rate of six six six is 95.47% in contaminated soil.
Embodiment 3
For the present embodiment for repairing organo-chlorine pesticide six six six contaminated soil, concrete operations are as follows:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, will repair medicament and surface layer with rotary cultivator
The smooth compacting after mixing of the contaminated soil of 300mm thickness, the dosage for repairing medicament are the 6% of contaminated soil quality,
The reparation medicament be sodium hydroxide and sodium peroxydisulfate composition solution, mass concentration 20%, the sodium hydroxide
Dosage is the 8% of sodium peroxydisulfate quality；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair medicament dilation angle model
Enclose interior all covering restoring areas；
Step (3) uses high-pressure rotary-spray injection device to repair medicine in institute's cloth point with the pressure injection of 25Mpa~30Mpa
Agent, the injection rate for repairing medicament are the 6% of contaminated soil quality, repair the preparation of medicament and the reparation medicament of step (1)
It is identical；
Step (4) installs heating device in medicine-pouring hole, and fills the sky between medicine-pouring hole and heating device with the grains of sand
Gap, the heating device are that heat recirculated water drives heating tube；
Step (5) opens heating device, soil is heated to 35 DEG C, maintains this temperature maintenance after 40 days to soil
Middle target contaminant is tested and analyzed, and calculates the degradation rate of target contaminant according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Through testing and analyzing, the degradation rate of six six six is 97.01% in contaminated soil.
Embodiment 4
The present embodiment is as follows for repairing 1,1- dichloroethanes and vinyl chloride contaminated soil, concrete operations:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, will repair medicament and surface layer with rotary cultivator
The smooth compacting after mixing of the contaminated soil of 300mm thickness, the dosage for repairing medicament are the 10% of contaminated soil quality,
The reparation medicament be sodium hydroxide and sodium peroxydisulfate composition solution, mass concentration 20%, the sodium hydroxide
Dosage is the 2% of sodium peroxydisulfate quality；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair medicament dilation angle model
Enclose interior all covering restoring areas；
Step (3) uses high-pressure rotary-spray injection device to repair medicine in institute's cloth point with the pressure injection of 25Mpa~30Mpa
Agent, the injection rate for repairing medicament are the 10% of contaminated soil quality, repair the preparation of medicament and the reparation medicament of step (1)
It is identical；
Step (4) installs heating device in medicine-pouring hole, and fills the sky between medicine-pouring hole and heating device with the grains of sand
Gap, the heating device are that heat recirculated water drives heating tube；
Step (5) opens heating device, soil is heated to 35 DEG C, maintains this temperature maintenance after 40 days to soil
Middle target contaminant is tested and analyzed, and calculates the degradation rate of target contaminant according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Through testing and analyzing, the degradation rate of 1,1- dichloroethanes is 95.38% in contaminated soil, and the degradation rate of vinyl chloride is
96.37%.
Embodiment 5
The present embodiment is as follows for repairing 1,1- dichloroethanes and vinyl chloride contaminated soil, concrete operations:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, will repair medicament and surface layer with rotary cultivator
The smooth compacting after mixing of the contaminated soil of 300mm thickness, the dosage for repairing medicament are the 4% of contaminated soil quality,
The reparation medicament be sodium hydroxide and sodium peroxydisulfate composition solution, mass concentration 20%, the sodium hydroxide
Dosage is the 4% of sodium peroxydisulfate quality；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair medicament dilation angle model
Enclose interior all covering restoring areas；
Step (3) uses high-pressure rotary-spray injection device to repair medicine in institute's cloth point with the pressure injection of 25Mpa~30Mpa
Agent, the injection rate for repairing medicament are the 4% of contaminated soil quality, repair the preparation of medicament and the reparation medicament of step (1)
It is identical；
Step (4) installs heating device in medicine-pouring hole, and fills the sky between medicine-pouring hole and heating device with the grains of sand
Gap, the heating device are that heat recirculated water drives heating tube；
Step (5) opens heating device, soil is heated to 40 DEG C, maintains this temperature maintenance after 40 days to soil
Middle target contaminant is tested and analyzed, and calculates the degradation rate of target contaminant according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Through testing and analyzing, the degradation rate of 1,1- dichloroethanes is 98.26% in contaminated soil, and the degradation rate of vinyl chloride is
97.98%.
Embodiment 6
The present embodiment is as follows for repairing 1,1- dichloroethanes and vinyl chloride contaminated soil, concrete operations:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, will repair medicament and surface layer with rotary cultivator
The smooth compacting after mixing of the contaminated soil of 300mm thickness, the dosage for repairing medicament are the 6% of contaminated soil quality,
The reparation medicament be sodium hydroxide and sodium peroxydisulfate composition solution, mass concentration 20%, the sodium hydroxide
Dosage is the 8% of sodium peroxydisulfate quality；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair medicament dilation angle model
Enclose interior all covering restoring areas；
Step (3) is used high-pressure rotary-spray injection device to be injected in institute's cloth point with 25Mpa~30Mpa pressure and repairs medicament,
The injection rate for repairing medicament is the 6% of contaminated soil quality, repairs the preparation of medicament and the reparation medicament phase of step (1)
Together；
Step (4) installs heating device in medicine-pouring hole, and fills the sky between medicine-pouring hole and heating device with the grains of sand
Gap, the heating device use electric drive heating rod；
Step (5) opens heating device, soil is heated to 35 DEG C, maintains this temperature maintenance after 40 days to soil
Middle target contaminant is tested and analyzed, and calculates the degradation rate of target contaminant according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Through testing and analyzing, the degradation rate of 1,1- dichloroethanes is 97.74% in contaminated soil, and the degradation rate of vinyl chloride is
99.91%.
Comparative example 1
This comparative example does not heat, only adds medicament, for repairing organo-chlorine pesticide six six six contaminated soil, concrete operations
It is as follows:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, will repair medicament and surface layer with rotary cultivator
The smooth compacting after mixing of the contaminated soil of 300mm thickness, the dosage for repairing medicament are the 6% of contaminated soil quality,
The reparation medicament be sodium hydroxide and sodium peroxydisulfate composition solution, mass concentration 20%, the sodium hydroxide
Dosage is the 8% of sodium peroxydisulfate quality；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair medicament dilation angle model
Enclose interior all covering restoring areas；
Step (3) uses high-pressure rotary-spray injection device to repair medicine in institute's cloth point with the pressure injection of 25Mpa~30Mpa
Agent, the injection rate for repairing medicament are the 6% of contaminated soil quality, repair the preparation of medicament and the reparation medicament of step (1)
It is identical；
Step (4) after dosing, carries out detection point to target contaminant in soil after conserving 40 days under conditions of 10 DEG C
Analysis, and the degradation rate of target contaminant is calculated according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Reparation medicament used in above-mentioned steps (1) and step (3) is the sodium hydroxide and persulfuric acid of mass concentration 20%
Composition of sodium aqueous solution, wherein the dosage of sodium hydroxide is the 8% of sodium peroxydisulfate quality.
Through testing and analyzing, the degradation rate of six six six is 18.39% in contaminated soil.
Comparative example 2
This comparative example only heats, and does not add medicament, for repairing organo-chlorine pesticide six six six contaminated soil, concrete operations
It is as follows:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, using GPS positioning instrument according to triangle
Method is layouted, and parameter of layouting, which guarantees to repair within the scope of heating radius, all covers restoring area；
Step (2) using pilot hole machine in position punching installation heating device of layouting, and fills hole and heating device with the grains of sand
Between gap, the heating device use electric drive heating rod；
Step (3) opens heating device for soil and is heated to 40 DEG C, maintains this temperature maintenance after 40 days in soil
Target contaminant is tested and analyzed, and calculates the degradation rate of target contaminant according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Through testing and analyzing, the degradation rate of six six six is 7.13% in contaminated soil.
Comparative example 3
This comparative example does not heat, only adds medicament, for repairing 1,1- dichloroethanes and vinyl chloride contaminated soil, specifically
It operates as follows:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, will repair medicament and surface layer with rotary cultivator
The smooth compacting after mixing of the contaminated soil of 300mm thickness, the dosage for repairing medicament are the 6% of contaminated soil quality,
The reparation medicament be sodium hydroxide and sodium peroxydisulfate composition solution, mass concentration 20%, the sodium hydroxide
Dosage is the 8% of sodium peroxydisulfate quality；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair medicament dilation angle model
Enclose interior all covering restoring areas；
Step (3) uses high-pressure rotary-spray injection device to repair medicine in institute's cloth point with the pressure injection of 25Mpa~30Mpa
Agent, the injection rate for repairing medicament are the 6% of contaminated soil quality, repair the preparation of medicament and the reparation medicament of step (1)
It is identical；
Step (4) after dosing, carries out detection point to target contaminant in soil after conserving 40 days under conditions of 10 DEG C
Analysis, and the degradation rate of target contaminant is calculated according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Reparation medicament used in above-mentioned steps (1) and step (3) is the sodium hydroxide and persulfuric acid of mass concentration 20%
Composition of sodium aqueous solution, wherein the dosage of sodium hydroxide is the 8% of sodium peroxydisulfate quality.
Through testing and analyzing, the degradation rate of 1,1- dichloroethanes is 25.18% in contaminated soil, and the degradation rate of vinyl chloride is
32.36%.
Comparative example 4
This comparative example only heats, and does not add medicament, for repairing 1,1- dichloroethanes and vinyl chloride contaminated soil, specifically
It operates as follows:
Step (1) removes the sundries such as contaminated soil surface reinforcing bar, chad, wood, using GPS positioning instrument according to triangle
Method is layouted, and parameter of layouting, which guarantees to repair within the scope of heating radius, all covers restoring area；
Step (2) using pilot hole machine in position punching installation heating device of layouting, and fills hole and heating device with the grains of sand
Between gap, the heating device be heat recirculated water drive heating tube；
Step (3) opens heating device for soil and is heated to 40 DEG C, maintains this temperature maintenance after 40 days in soil
Target contaminant is tested and analyzed, and calculates the degradation rate of target contaminant according to the following formula:
Target contaminant degradation rate=and (the preceding pollutant in soil concentration of reparation-pollutant in soil concentration after reparation)/it repairs
Pollutant in soil concentration × 100% before multiple
Through testing and analyzing, the degradation rate of 1,1- dichloroethanes is 17.75% in contaminated soil, and the degradation rate of vinyl chloride is
21.62%.
The degradation rate of the main implementation parameter and target contaminant of above-described embodiment and comparative example is listed in table 1.
The main implementation parameter of 1 embodiment and comparative example of table and the degradation rate of target contaminant
As shown in Table 1, only low-temperature heat or dosing but without heat strengthen auxiliary comparative example implementation result it is undesirable, to mesh
Marking contaminant degradation rate is only 7%~33%, and strengthens the implementation of assisted in situ chemical oxidation renovation of organic pollution soil through heat
Target contaminant degradation rate is higher in example, generally between 90%~99%.In addition, the present invention by situ chemical oxidation technology and
Thermal desorption technology reasonable combination in situ, has widened the usage scenario of original technology, improves remediation efficiency and quality, while substantially
The rehabilitation cost of soil is reduced, there is stronger engineering application value.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of method that heat strengthens assisted in situ chemical oxidation renovation of organic pollution soil, it is characterised in that: this method includes
Following steps:
Step (1) removes contaminated soil surface irregularities, will repair medicament with rotary cultivator and the contaminated soil of surface layer 300mm thickness mixes
Smooth compacting after closing uniformly；
Step (2) is layouted using GPS positioning instrument according to triangulation method, and parameter of layouting guarantees to repair within the scope of medicament dilation angle
All covering restoring areas；
Step (3) is injected in institute's cloth point using high-pressure rotary-spray injection device and repairs medicament；
Step (4) installs heating device in medicine-pouring hole, and fills the gap between medicine-pouring hole and heating device with the grains of sand；
Step (5) opens heating device, contaminated soil is heated to 30 DEG C~40 DEG C and keeps this temperature, until target
Pollutant is sufficiently reacted with medicament is repaired, so that target pollutant concentration, which is reduced to, repairs target value or less.
2. heat strengthens the method for assisted in situ chemical oxidation renovation of organic pollution soil according to claim 1, feature exists
In: the injection pressure of high-pressure rotary-spray injection device described in step (3) is 25Mpa~30Mpa, and reparation medicament dilation angle is 1m
~3m.
3. heat strengthens the method for assisted in situ chemical oxidation renovation of organic pollution soil according to claim 1, feature exists
In: in step (1) and step (3), the reparation medicament is sodium hydroxide and sodium peroxydisulfate composition solution；Repair medicament
Amount of application is the 4%~10% of target repairing polluted soil quality.
4. heat strengthens the method for assisted in situ chemical oxidation renovation of organic pollution soil according to claim 3, feature exists
In: in the sodium hydroxide and sodium peroxydisulfate composition solution the dosage of sodium hydroxide be sodium peroxydisulfate quality 2%~
8%；The mass concentration of sodium hydroxide and sodium peroxydisulfate composition solution is 20%.
5. heat strengthens the method for assisted in situ chemical oxidation renovation of organic pollution soil according to claim 1, feature exists
In: heating device described in step (4) and step (5) is one kind that electric drive heating rod or heat recirculated water drive heating tube.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110842020A (en) * | 2019-12-02 | 2020-02-28 | 上海康恒环境修复有限公司 | Method for repairing petroleum-polluted soil by heat-strengthening-assisted in-situ microorganisms |
| CN111299313A (en) * | 2020-02-12 | 2020-06-19 | 中冶成都勘察研究总院有限公司 | Hydrothermal oxidation remediation method for sodium persulfate in organic matter contaminated soil |
| CN111672893A (en) * | 2020-04-07 | 2020-09-18 | 江苏大天环境科技有限公司 | Indirect thermal desorption process for contaminated soil remediation |
| CN113732045A (en) * | 2021-08-26 | 2021-12-03 | 东南大学 | Chemical-thermal desorption combined remediation method for polycyclic aromatic hydrocarbon contaminated soil |
| CN114393026A (en) * | 2022-01-20 | 2022-04-26 | 生态环境部南京环境科学研究所 | Method for degrading nitrobenzene soil based on hot activated sodium sulfate |
| CN114888069A (en) * | 2022-04-14 | 2022-08-12 | 中交天航环保工程有限公司 | Point location design method for in-situ chemical oxidation remediation of contaminated soil |
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| CN114393026A (en) * | 2022-01-20 | 2022-04-26 | 生态环境部南京环境科学研究所 | Method for degrading nitrobenzene soil based on hot activated sodium sulfate |
| CN114888069A (en) * | 2022-04-14 | 2022-08-12 | 中交天航环保工程有限公司 | Point location design method for in-situ chemical oxidation remediation of contaminated soil |
| CN114888069B (en) * | 2022-04-14 | 2023-09-26 | 中交天航环保工程有限公司 | Point location design method for in-situ chemical oxidation remediation of polluted soil |
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