CN108723081A - A kind of innoxious restorative procedure of organic polluted soil - Google Patents
A kind of innoxious restorative procedure of organic polluted soil Download PDFInfo
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- CN108723081A CN108723081A CN201810607122.5A CN201810607122A CN108723081A CN 108723081 A CN108723081 A CN 108723081A CN 201810607122 A CN201810607122 A CN 201810607122A CN 108723081 A CN108723081 A CN 108723081A
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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
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/065—Reclamation of contaminated soil thermally by pyrolysis
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- Environmental & Geological Engineering (AREA)
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Abstract
The present invention relates to a kind of innoxious restorative procedures of organic polluted soil, include the following steps：（1）In organic contamination place excavation pit, the organic polluted soil dug out is transported in closed greenhouse, oxidant is added in organic polluted soil and catalyst is thoroughly mixed uniformly, 24-28h is placed in accumulation, obtains redox organic polluted soil；（2）The redox organic polluted soil is heat-treated 30-50 minutes through 150-200 DEG C, obtains heat treatment organic polluted soil；（3）The heat treatment organic polluted soil is added organic matter and is uniformly mixed, and obtains planting soil；（4）The planting soil is backfilled to place original excavation pit, and it is fluffy conventionally to plant alkali.Restorative procedure of the present invention is simple, and repairing effect is good, is suitable for the reparation of the soil of a variety of pollution situations.
Description
Technical field
The present invention relates to environmental technology fields, and in particular to a kind of innoxious restorative procedure of organic polluted soil.
Background technology
Contaminated soil remediation refers to making soil by physics, chemistry, biology, ecological principle, and use artificial regulatory measure
Earth pollutant dense (work) degree reduce, realize pollutant it is innoxious and stabilize, to reach it is intended that detoxifying effect technology
Measure.Currently, recovery technique possible in theory has phytoremediation, microorganism remediation, chemical remediation, peripheral doses and synthesis to repair
Several major class such as multiple.Some recovery techniques come into the field application stage and achieve preferable effect.Contaminated soil implementation is repaiied
It is multiple, to blocking pollutant to enter food chain, prevents from causing damages to health, promote land resource protection and sustainable development
It is of great significance.
The reparation of degrading organic pollutant and heavy-metal contaminated soil is focused primarily upon about the research and development of the technology at present
Two broad aspects.The pollution situation of contaminated soil is more complicated, is related to heavy metal pollution, organic pollution, heavy metal and organic
The contaminated soil of a variety of situations such as object contaminated soil, irritation peculiar smell soil, soil treatment complex process, and difficulty reaches ideal
Regulation effect be easy to cause secondary pollution if reparation is bad.
Invention content
To solve the above problems, the present invention provides, a kind of restorative procedure is simple, and reparation is thorough, is suitable for a variety of contaminated soils
The innoxious restorative procedure of machine contaminated soil of situation.
Technical scheme of the present invention：
A kind of innoxious restorative procedure of organic polluted soil, includes the following steps：（1）It, will in organic contamination place excavation pit
The organic polluted soil dug out is transported in closed greenhouse, and oxidant is added in organic polluted soil and catalyst is thoroughly mixed
Uniformly, 24-28h is placed in accumulation, obtains redox organic polluted soil；
It is provided with exhaust outlet on the closed greenhouse, emission-control equipment is connected outside the exhaust outlet；
（2）The redox organic polluted soil is heat-treated 30-50 minutes through 150-200 DEG C, obtains heat treatment organic contamination
Soil；
（3）The heat treatment organic polluted soil is added organic matter and is uniformly mixed, and obtains planting soil；
（4）The planting soil is backfilled to place original excavation pit, and it is fluffy conventionally to plant alkali.
Further, the organic polluted soil carries out carrying out screening pretreatment using screening machine before entering greenhouse, by grain
The thick impurity of diameter >=50mm removes, and the big grain size building waste of >=50mm, which is concentrated, to be stacked to building waste cleaning area, is eluted,
To over-the-counter qualified building waste stacking area, screening machine carries out contaminated soil of the screening pretreatment less than 50mm and is transported to for transport after qualification
In closed greenhouse.
Further, step（1）By organic contamination soil according to long 10-12m, wide 2-3m, high 2.5-3m is in closed greenhouse
It carries out strip to bank up, then medicament is uniformly spread and is spilt in organic contamination soil top, contaminated soil and medicine are carried out using screening plant
The mixing of agent, the equipment are not less than 200-240 cubes of m/h/time, mixing for the working efficiency of chemical oxidation soil remediation
Number be no less than 2 times.
Further, the oxidant is persulfate, permanganate, H2O2, the combination of one or more of ozone,
The catalyst is calcium oxide pulvis；The addition of the oxidant is the 0.1-10% of organic matter quality in organic polluted soil,
The addition of the catalyst is the 0.1-5% of organic matter quality in organic polluted soil.
Further, the emission-control equipment includes combustion furnace and the activated carbon adsorption that is connect with combustion furnace gas outlet
Device.
Further, the redox organic polluted soil through 150-200 DEG C of heat treatment is heat-treated in rotary kiln,
Rotary kiln connects emission-control equipment.The highest tolerable temperature of the rotary kiln is 550 DEG C
Further, the organic matter is sawdust, turf and rotten bark, and the quality of organic matter is heat treatment organic polluted soil matter
The 2-15% of amount.
Further, every fluffy seed dosage 2.9-3.1kg of 667 square metres of alkali, the fluffy line-spacing 30cm of alkali, blinding after water furrow planting
3cm, the fluffy sowing of alkali is to fresh vegetable plucking time 25~40d of spring and summer, 45~60d of autumn and winter, until fresh vegetable plucking time pulls out alkali
It is fluffy.
Further, pull out alkali it is fluffy after with every 500 cubic metres acquisition one sample sampling frequency be detected analysis, such as
Fruit pollutant in soil content less than repair desired value, then by check and accept, such as higher than repair desired value, then again plantation alkali it is fluffy into
Row processing, until final acceptance(check).
Further, the organic material contaminated soil includes benzene homologues, polycyclic aromatic hydrocarbon, petroleum hydrocarbon, cyanide, hydrocarbonization
Close object and gasoline contamination soil.
Beneficial effects of the present invention：
Restorative procedure of the present invention is simple, and repairing effect is good, is suitable for the reparation of the soil of a variety of pollution situations.Present invention useization
Learn oxidation and physics heat treatment in conjunction with mode handle organic polluted soil, two ways combination processing organic polluted soil,
On the one hand the usage amount of chemical oxidation medicament can be reduced, on the other hand more relative to the mode pyrolysis temperature being individually heat-treated
It is low, much smaller than the temperature of tradition 500-600 DEG C of organic matter of thermal decomposition, this is because being destroyed during adding medicine redox
The chemical bond of some organic matters reduces heat decomposition temperature, and so that many organic matters is volatilized or is decomposed during adding medicine,
Remaining amount becomes smaller, and decomposes volatilization rapidly in rotary kiln, the temperature and time needed is all fewer, by chemical agent and heat
Duplex treatment is handled, the remaining quantity of organic pollution is low, but since the addition of chemical oxidation medicament and catalyst leads to soil
Meeting salinization of soil, and the use of chemical oxidation medicament and catalyst can lead to soil hardening, addition organic matter is fluffy by planting alkali, no
Wetland with saline-alkaline situation can only be changed, and the remaining organic matter of the fluffy further absorption of alkali can be utilized, moreover it is possible to be absorbed rich in soil
The heavy metal elements such as Cu, Zn, Pb, Cd of collection, thorough rehabilitating soil so that soil is reached beneficial to plant growth, not only soil
To general reparation level, or even the requirement of Planting Crops can be reached.
The organic polluted soil carries out carrying out screening pretreatment using screening machine before entering greenhouse, by grain size >=50mm's
Thick impurity removal, the big grain size building waste of >=50mm, which is concentrated, to be stacked to building waste cleaning area, is eluted, is transported after qualified
To over-the-counter qualified building waste stacking area, screening machine carries out contaminated soil of the screening pretreatment less than 50mm and is transported to closed greenhouse
In, the building waste that this process is conducive to remove bulk reduces the workload of processing organic polluted soil, and is less than 50mm's
Contaminated soil is contacted due to small with medicament more abundant in processing procedure, and pyrolysis also more fully, handles the effect of organic matter
More preferably；
The oxidant is persulfate, permanganate, H2O2, the combination of one or more of ozone, the catalyst is
Calcium oxide pulvis；The addition of the oxidant is the 0.1-10% of organic matter quality in organic polluted soil, the catalyst
Addition is the 0.1-5% of organic matter quality in organic polluted soil, the catalyst and oxidant combination processing, treatment effeciency
Height, processing organic matter is thorough, especially H2O2Influence with ozone to environment is small, is water and oxygen, specific addition after being disposed
Amount carries out lab scale comparison according to the pollution level of soil organic matter, obtains best dosage.
The emission-control equipment includes combustion furnace and the active carbon adsorber that is connect with the gas outlet of combustion furnace, closed
Exhaust outlet and rotary kiln on greenhouse are all connected with emission-control equipment, and the organic exhaust gas generated in closed greenhouse and rotary kiln passes through
It after burning, is adsorbed using active carbon adsorber, reaches best treatment effect, it is free from environmental pollution.
The organic matter is sawdust, turf and rotten bark, and the quality of organic matter is heat treatment organic polluted soil quality
2-15%, the fermentation of one side organic matter rot that a part of alkalinity can be neutralized, and on the other hand provide nutrient for the fluffy growth of alkali.
Every fluffy seed dosage 2.9-3.1kg of 667 square metres of alkali, the fluffy line-spacing 30cm of alkali, blinding 3cm after water furrow planting, alkali are fluffy
Reach optimum growh situation.
It plants alkali and analysis is detected with the sampling frequency of one sample of every 500 cubic metres acquisitions after fluffy 1 year, if native
Pollutant load is less than reparation desired value in earth, then by checking and accepting, as higher than desired value is repaired, then planted again, alkali is fluffy to be located
Reason, until final acceptance(check), can pass through the fluffy multiple plantation processing of alkali, reach final reparation target, pollutant is dropped
As low as minimum.
Specific implementation mode
A certain chemical plant soil is polluted, and wants to be changed to commercial land now, is badly in need of repairing, be closed in this chemical plant land used
Note organic pollution is polycyclic aromatic hydrocarbon（Phenanthrene, benzo (a) anthracene, benzo (b) fluoranthene, benzo (a) pyrene, indeno (1,2,3-cd) pyrene, two
Benzo (a, h) anthracene）, petroleum hydrocarbon（C6-C16,C17-C36）, dimethylbenzene has in organic contamination place excavation pit by what is dug out
Machine contaminated soil is transported in closed greenhouse, takes 1 ton of progress mixed processing of Polluted area pedotheque, specific processing step as follows：
（1）1 ton of contaminated farmland regional soil sample carries out screening pretreatment using screening machine, by the thick miscellaneous of grain size >=50mm
Matter removes, and the big grain size building waste of >=50mm, which is concentrated, to be stacked to building waste cleaning area, is eluted, and is transported to field after qualified
Outer qualification building waste stacking area, screening machine carries out contaminated soil of the screening pretreatment less than 50mm and is transported in closed greenhouse, small
Amount to 890kg in the contaminated soil of 50mm；
By organic contamination soil according to long 10-12m, wide 2-3m, high 2.5-3m carry out strip in closed greenhouse and bank up, and then will
Uniformly paving is spilt in organic contamination soil top for 10kg calcium oxide and the sodium peroxydisulfate medicament of 10kg, and Polluted Soil is carried out using screening plant
The mixing of earth and medicament, the equipment for chemical oxidation soil remediation working efficiency not less than 200-240 cubes m/h/
Time, mixed number is no less than 5 times, is uniformly mixed accumulation and is placed 28h, obtains redox organic polluted soil；It is described closed
Be provided with exhaust outlet on greenhouse, connected outside the exhaust outlet emission-control equipment described in emission-control equipment include combustion furnace and
The active carbon adsorber being connect with combustion furnace gas outlet, exhaust gas adsorb after combustion furnace burns after active carbon adsorber；
（2）200 DEG C of rotary kilns of the redox organic polluted soil are heat-treated 45 minutes, obtain heat treatment organic contamination soil
Earth；The highest tolerable temperature of the rotary kiln is 550 DEG C, and rotary kiln connects emission-control equipment, and exhaust gas is after combustion furnace burns
It is adsorbed after active carbon adsorber；
（3）The heat treatment organic polluted soil is added organic matter and is uniformly mixed, and obtains planting soil；
The organic matter is the mixture of sawdust, turf and rotten bark, and the quality of organic matter is 4kg.
（4）The planting soil is backfilled to place original excavation pit, and it is fluffy conventionally to plant alkali.
Every fluffy seed dosage 3kg of 667 square metres of alkali, the fluffy line-spacing 30cm of alkali, blinding 3cm after water furrow planting, plantation in March, 40
It is pulled out after it, soil is detected；Testing result is shown in Table 1；
It is planted again after pulling out once, process repeats the process that plantation alkali is fluffy for the first time, pulls out after 40 days, is examined again to soil
It surveys；Testing result is shown in Table 1.
Contaminated soil testing result such as table 1：
There are pollution determination result statistics and evaluation table in 1 soil of table
Note：" -- " indicates that the pollutant is not present in the region
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.To this
A variety of modifications of a little embodiments will be apparent to those skilled in the art, as defined herein general
Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will not
It can be intended to be limited to the embodiments shown herein, and be to fit to consistent with the principles and novel features disclosed in this article
Widest range.
Claims (10)
1. a kind of innoxious restorative procedure of organic polluted soil, which is characterized in that include the following steps：（1）In organic contamination field
The organic polluted soil dug out is transported in closed greenhouse by ground excavation pit, and oxidant and catalysis are added in organic polluted soil
Agent is thoroughly mixed uniformly, and 24-28h is placed in accumulation, obtains redox organic polluted soil；
It is provided with exhaust outlet on the closed greenhouse, emission-control equipment is connected outside the exhaust outlet；
（2）The redox organic polluted soil is heat-treated 30-50 minutes through 150-200 DEG C, obtains heat treatment organic contamination
Soil；
（3）The heat treatment organic polluted soil is added organic matter and is uniformly mixed, and obtains planting soil；
（4）The planting soil is backfilled to place original excavation pit, and it is fluffy conventionally to plant alkali.
2. the innoxious restorative procedure of a kind of organic polluted soil according to claim 1, which is characterized in that organic dirt
Dye soil carries out carrying out screening pretreatment using screening machine before entering greenhouse, the thick impurity of grain size >=50mm is removed, >=50mm
Big grain size building waste concentrate and stack to building waste cleaning area, eluted, it is qualified after transport to over-the-counter qualified building rubbish
Rubbish stacking area, screening machine carry out contaminated soil of the screening pretreatment less than 50mm and are transported in closed greenhouse.
3. the innoxious restorative procedure of a kind of organic polluted soil according to claim 1, which is characterized in that step（1）It will
According to long 10-12m, wide 2-3m, high 2.5-3m carry out strip in closed greenhouse and bank up organic contamination soil, then that medicament is uniform
Paving is spilt in organic contamination soil top, and the mixing of contaminated soil and medicament is carried out using screening plant, which is used for chemical oxidation
The working efficiency of soil remediation is not less than 200-240 cubes of m/h/time, and mixed number is no less than 2 times.
4. the innoxious restorative procedure of a kind of organic polluted soil according to claim 1, which is characterized in that the oxidation
Agent is persulfate, permanganate, H2O2, the combination of one or more of ozone, the catalyst is calcium oxide pulvis；It is described
The addition of oxidant is the 0.1-10% of organic matter quality in organic polluted soil, and the addition of the catalyst is organic dirt
Contaminate the 0.1-5% of organic matter quality in soil.
5. the innoxious restorative procedure of a kind of organic polluted soil according to claim 1, which is characterized in that at the exhaust gas
Reason device includes combustion furnace and the active carbon adsorber that is connect with combustion furnace gas outlet.
6. the innoxious restorative procedure of a kind of organic polluted soil according to claim 1, which is characterized in that the oxidation is also
Former organic polluted soil through 150-200 DEG C of heat treatment is heat-treated in rotary kiln, and rotary kiln connects emission-control equipment.
7. the innoxious restorative procedure of a kind of organic polluted soil according to claim 1, which is characterized in that the organic matter
For sawdust, turf and rotten bark, the quality of organic matter is to be heat-treated the 2-15% of organic polluted soil quality.
8. the innoxious restorative procedure of a kind of organic polluted soil according to claim 1, which is characterized in that every 667 squares
The rice fluffy seed dosage 2.9-3.1kg of alkali, the fluffy line-spacing 30cm of alkali, blinding 3cm after water furrow planting, the fluffy sowing of alkali to fresh vegetable plucking time
25~40d of spring and summer, 45~60d of autumn and winter, until to pull out alkali fluffy for fresh vegetable plucking time.
9. the innoxious restorative procedure of a kind of organic polluted soil according to claim 8, which is characterized in that pull out fluffy kind of alkali
Analysis is detected with the sampling frequency of one sample of every 500 cubic metres acquisitions afterwards, is repaiied if pollutant in soil content is less than
Complicated target value, then by checking and accepting, as higher than desired value is repaired, then planted again, alkali is fluffy to be handled, until final acceptance(check).
10. the innoxious restorative procedure of a kind of organic polluted soil according to claim 1, which is characterized in that described has
Machine object contaminated soil includes benzene homologues, polycyclic aromatic hydrocarbon, petroleum hydrocarbon, cyanide, hydrocarbon and gasoline contamination soil.
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| CN110078337A (en) * | 2019-05-23 | 2019-08-02 | 东北大学 | A kind of method of low temperature thermal decomposition copper cyano complex |
| CN110090386A (en) * | 2019-05-23 | 2019-08-06 | 东北大学 | A kind of method of low-temperature catalytic oxidation Cymag |
| CN110090385A (en) * | 2019-05-23 | 2019-08-06 | 东北大学 | A kind of method of Catalytic Thermal Decomposition removing zinc cyano complex |
| CN110102008A (en) * | 2019-05-23 | 2019-08-09 | 东北大学 | A kind of method of catalysis oxidation low temperature thermal decomposition Zassol |
| CN110102007A (en) * | 2019-05-23 | 2019-08-09 | 东北大学 | A kind of method that the cyanogen of low-temperature catalysis thermal decomposition iron closes complex |
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| CN110078337B (en) * | 2019-05-23 | 2021-11-30 | 东北大学 | Method for low-temperature thermal decomposition of copper-cyanogen complex |
| CN110102007B (en) * | 2019-05-23 | 2021-07-27 | 东北大学 | Method for low-temperature catalytic pyrolysis of iron cyanide complex |
| CN110078337A (en) * | 2019-05-23 | 2019-08-02 | 东北大学 | A kind of method of low temperature thermal decomposition copper cyano complex |
| CN110102008A (en) * | 2019-05-23 | 2019-08-09 | 东北大学 | A kind of method of catalysis oxidation low temperature thermal decomposition Zassol |
| CN110102007A (en) * | 2019-05-23 | 2019-08-09 | 东北大学 | A kind of method that the cyanogen of low-temperature catalysis thermal decomposition iron closes complex |
| CN110090386A (en) * | 2019-05-23 | 2019-08-06 | 东北大学 | A kind of method of low-temperature catalytic oxidation Cymag |
| CN110090385A (en) * | 2019-05-23 | 2019-08-06 | 东北大学 | A kind of method of Catalytic Thermal Decomposition removing zinc cyano complex |
| CN110972832A (en) * | 2019-12-23 | 2020-04-10 | 中国环境科学研究院 | Preparation method for purifying coastal wetland polycyclic aromatic hydrocarbon pollution by suaeda salsa |
| CN111250534A (en) * | 2020-02-12 | 2020-06-09 | 中冶成都勘察研究总院有限公司 | Hydrothermal Fenton oxidation remediation method for organic matter contaminated soil |
| 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 |
| CN111922064A (en) * | 2020-07-30 | 2020-11-13 | 上海应用技术大学 | Method for oxidizing and degrading pollutants in soil by catalyzing chlorine dioxide |
| CN112916609A (en) * | 2021-03-03 | 2021-06-08 | 重庆桂溪生态环境科技有限公司 | Method for blocking and burying polluted soil |
| CN113275372A (en) * | 2021-06-07 | 2021-08-20 | 江苏南京地质工程勘察院 | Modifier-enhanced thermal desorption remediation method for polycyclic aromatic hydrocarbon-polluted site |
| CN113275372B (en) * | 2021-06-07 | 2023-08-01 | 江苏南京地质工程勘察院 | Modifier reinforced thermal desorption restoration method for polycyclic aromatic hydrocarbon polluted site |
| CN113732045A (en) * | 2021-08-26 | 2021-12-03 | 东南大学 | Chemical-thermal desorption combined remediation method for polycyclic aromatic hydrocarbon contaminated soil |
| CN113728748A (en) * | 2021-09-02 | 2021-12-03 | 中国城市建设研究院有限公司 | Soil improvement method for greening soil after thermal desorption remediation |
| CN113732037A (en) * | 2021-09-08 | 2021-12-03 | 广东省中环协节能环保产业研究院 | Method for treating organic matter contaminated soil through thermal desorption |
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