CN106180168A - The method that plant bionic repairs place soil with chemical leaching, microbial association - Google Patents
The method that plant bionic repairs place soil with chemical leaching, microbial association Download PDFInfo
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- CN106180168A CN106180168A CN201610841726.7A CN201610841726A CN106180168A CN 106180168 A CN106180168 A CN 106180168A CN 201610841726 A CN201610841726 A CN 201610841726A CN 106180168 A CN106180168 A CN 106180168A
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- soil
- chemical leaching
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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
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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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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- 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
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Mycology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The method that plant bionic repairs place soil with chemical leaching, microbial association, belongs to soil restoring technology neighborhood.Comprise the following steps: (1) site investigation, determine the kind of target contaminant and concentration and spatial distribution thereof；(2) filler composition and the kind of chemical leaching, the concentration etc. of plant bionic prosthetic device in combined remediation method are determined；(3) arrange plant bionic prosthetic device according to contaminated sites situation, combine with in-situ chemical elution technique, repair contaminated site；(4) monitoring of contaminated site, the situation of change of sample analysis target pollutant concentration, thus decide whether change plant bionic prosthetic device or change the composition of chemical leaching, concentration, drip washing number of times etc.；(5) plant bionic prosthetic device is reclaimed after site remediation is up to standard；(6) apply microbial bacterial agent, degraded in-situ chemical lessivation adds the chemical leaching in contaminated soil to, accelerates the degraded of exogenous chemical substances.
Description
Technology neighborhood
The invention belongs to soil restoring technology neighborhood, be specifically related to the combined remediation technology of industrial sites contaminated soil.
Background technology
Recently as the fast development of economic technology, produce various environmental problem.Wherein, soil pollution is due to itself
The potentiality that has, chronicity, the feature such as difficult attract attention.Industrial sites pollutes predominantly chemical industry, plating
The soil pollution caused etc. industry, has pollutant complexity, concentration relatively high, it is difficult to realize in-situ immobilization, showering
Process cost is higher, repair time is longer.
The most conventional soil restoring technology mainly includes following several: soil moved in improve the original method, fixing-stable method, chemical leaching,
Thermal desorption, electro reclamation, oxidoreduction reparation, phytoremediation, microorganism remediation etc., these methods are used equally to soil remediation,
But the scope of application of distinct methods and feature also differ.Soil moved in improve the original method needs the cleanest soil, spends higher simultaneously；Chemistry
Fixing, chemical leaching can reduce soil pollution substrate concentration, but easily cause secondary pollution, destroys the physicochemical property of soil, repaiies
Soil after Fu is only used for construction etc.；Electric repairing technique is current and immature, it is difficult to popularization and application on a large scale；Plant
Thing reparation, microorganism remediation can be restricted by soil labile organic matter, and repair time is longer, inefficient.
Therefore, the new technique of exploitation soil remediation has great importance for the predicament solving current soil remediation, this
Invention mainly utilizes the most self-holding recovery technique of a kind of novel soil restoring technology contaminated soil based on plant bionic, will
This technology combines with in-situ chemical drip washing recovery technique, quickly repairs the composite industrial contaminated soil of high concentration, finally profit
Use microbial degradation chemical leaching so that chemical substance noresidue, be really achieved safe and clean, repair efficiently.
Summary of the invention
The invention provides the method that plant bionic repairs place soil with chemical leaching, microbial association, can be used for repairing
The composite industrial contaminated soil of multiple high concentration and general contaminative soil, the concentration of pollutant in soil matter capable of being fast degraded, flower
Take relatively low, there is feature safe and clean, efficient.
The method that plant bionic repairs place soil with chemical leaching, microbial association, comprises the following steps:
(1) place is carried out the investigation of basic condition, determines the kind of pollutant and concentration and spatial distribution thereof；
(2) plant bionic prosthetic device in combined remediation method is determined according to place soil pollutant kind and distribution thereof
Filler composition and the kind of chemical leaching, concentration etc.；
(3) arrange plant bionic prosthetic device according to the spatial distribution of contaminated sites thing, in soil, water chemistry pouring simultaneously
Washing liquid, plant bionic technology combines with in-situ chemical elution technique, repairs contaminated site；
(4) monitoring of contaminated site, the situation of change of sample analysis pollutant levels, thus decide whether that changing plant imitates
Raw prosthetic device or the change composition of chemical leaching, concentration, drip washing number of times etc., until site remediation is up to standard；
(5) reclaiming plant bionic prosthetic device after site remediation is up to standard, the filler in plant bionic device is through acid, alkali or warm
Repeatable utilization after parsing；
(6) to repair up to standard after place apply microbial bacterial agent or use self microorganism, degraded in-situ chemical drenches
Add the chemical leaching in contaminated soil during washing to, accelerate the degraded of exogenous chemical substances.
In described step (2) plant bionic prosthetic device filler and the kind of chemical leaching, concentration refer mainly to select right
Target stains material has stronger adsorbing plant bionic prosthetic device filler, it is possible to change target Heavy Metals, organic
The chemical leaching of thing dissolubility.
In described step (3), plant frees to repair and carries out with chemical leaching reparation simultaneously, and plant bionic prosthetic device is main
The polluter of solubility in soil there is is good removal effect, repair process changes heavy metal-polluted soil by chemical leaching
Form and the dissolubility of organic substance, make heavy metal-polluted soil more be converted to solubilized state, Organic substance more transfers water to
Solvent, increases the efficiency of plant bionic recovery technique.
In described step (4), the monitoring cycle of contaminated site is 1 month, according to the concentration of pollutant in soil matter, reparation
Effect decides whether change plant bionic prosthetic device or change the concentration of chemical leaching, drip washing mode.Specific Principles is:
If the decline of soil characteristic pollutant levels produces a desired effect, filler enriched concentration is not reaching to saturated concentration, without changing
Plant bionic prosthetic device；If filler enriched concentration reaches saturated concentration, need to change plant bionic prosthetic device；If it is native
Earth characteristic contamination lowering of concentration is notable, and filler is also not up to saturated concentration, the kind that needs to consider to adjust chemical leaching,
Concentration or drip washing mode.
In described step (5), in plant bionic prosthetic device, the analytic method of filler depends primarily on the property of characteristic contamination
Matter, desorbs polluter according to different choice acid, alkali, heat or the alternate manner of its character, it is achieved the recyclable profit of filler
With.
In described step (6), chemical leaching used by combine d bioremediation is mainly environmentally friendly organic monoacid (such as alkyl
Acid, alkyd, aromatic acid, olefin(e) acid, unsaturated fatty acid, satisfied fatty acid, phenol), surfactant etc., this chemical leaching can quilt
Microbial degradation, will not produce residual and secondary pollution.Microorganism used therefor microbial inoculum is mainly used in increasing micro-life of chemical leaching
Thing is degraded, and residue character polluter in soil can be played the effect of degraded simultaneously.
Compared with existing soil restoring technology, main advantages of the present invention are:
(1) recovery technique of the present invention is based technique for in-situ remediation, largely reduces the expense that repair process produces, just
In large-scale promotion and application.
(2) present invention mainly utilizes plant bionic recovery technique to reduce soil pollution substrate concentration, plant bionic recovery technique
Without additionaling power, can realize oneself and continue, repair time is short simultaneously, efficiency is high, environmentally safe, is a kind of environmental friendliness
Recovery technique.
(3) chemical leaching in combine d bioremediation is had any different with traditional chemical leaching, and the chemical leaching of the present invention is mainly
Chemical leaching is utilized to change the heavy metal in soil and the existing forms of organic pollution materials so that it is more to turn to soluble state
Become, increase plant and free the efficiency of reparation.
(4) although the present invention uses chemical leaching, but chemical leaching used is mainly environmentally friendly organic weak
Acid, surfactant etc., can be degraded by microorganisms, and will not produce residual and secondary pollution.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but the present invention is not limited to following example.
Example 1
Experimental field being positioned at zhuzhou,hunan and discard chemical industry garden, soil pH is 5.63, and heavy metal Cd content is 6.25mg kg-1,
Other heavy metal does not exceeds standard after measured, so target contaminant is heavy metal Cd, it is carried out combine d bioremediation.
The soil pollution situation of this discarded chemical industrial park is investigated in test sampling, determines the spatial distribution map of heavy metal Cd, has
Formulate combine d bioremediation scheme targetedly.Select the filler having preferable absorbability to Cd to make plant bionic prosthetic device, use
In plant bionic reparation.Select the eluent that Cd is had preferable drip washing effect simultaneously, the chemical leaching in combine d bioremediation,
Change the existing forms of Cd in soil.
Insert plant bionic prosthetic device according to testing program, contaminated soil is used in-situ chemical drip washing simultaneously, used
Eluent is the lactic acid solution of 5%, for the Cd of combined state in soil is changed into the Cd of solubilized state.
Monthly the situation of change of Cd content in sample analysis soil, is judged the reparation situation of contaminated soil by analysis result,
Decide whether change plant bionic prosthetic device or change the mode of chemical leaching.Cd content in soil after testing 3 months
Situation of change is as shown in the table:
Table 1 soil Cd changes of contents
As seen from the results in Table 1, after repairing 3 months, the Cd content in soil is all reduced to standard of soil environment quality
(GB15618-1995) the grade III Standard value of Cd in.
Reach the requirement of standard of soil environment quality after testing 3 months, terminate test, plant bionic prosthetic device is carried out
Recycle.Filler in plant bionic prosthetic device uses the hydrochloric acid solution of 0.05mol/l to soak, and desorbs filling adsorption
Cd, is finally rinsed with tap water, the filler recycling after drying.Owing to lactic acid is natural organic monoacid, in soil certainly
It just can be degraded by the microorganism that body exists, it is not necessary to adds external source strain.Add micro-after off-test among soil
Biological nutritive agent, accelerates the breeding of soil lactic acid degradation biological own, adds exogenous nitrogen, carbon and moisture simultaneously, survey after two months
Determining lactic acid content in soil and find that lactic acid does not remains, combine d bioremediation well solves interpolation external source in soil chemistry lessivation
The impact of lactic acid.
Claims (7)
1. the method that plant bionic repairs place soil with chemical leaching, microbial association, comprises the following steps:
(1) place is carried out the investigation of basic condition, determines the kind of pollutant and concentration and spatial distribution thereof；
(2) filler of plant bionic prosthetic device in combined remediation method is determined according to place soil pollutant kind and distribution thereof
Composition and the kind of chemical leaching, concentration；
(3) arrange plant bionic prosthetic device according to the spatial distribution of contaminated sites thing, in soil, water chemical leaching liquid simultaneously,
Plant bionic technology combines with in-situ chemical elution technique, repairs contaminated site；
(4) monitoring of contaminated site, the situation of change of sample analysis pollutant levels, thus decide whether that changing plant bionic repaiies
Apparatus for coating or the change composition of chemical leaching, concentration, drip washing number of times, until site remediation is up to standard；
(5) reclaiming plant bionic prosthetic device after site remediation is up to standard, the filler in plant bionic device is through acid, alkali or Thermal desorption
Rear repeatable utilization；
(6) to repair up to standard after place apply microbial bacterial agent or use self microorganism, in-situ chemical drip washing of degrading
Journey is added to the chemical leaching in contaminated soil, accelerates the degraded of exogenous chemical substances.
2. the method repairing place soil according to the plant bionic described in claim 1 with chemical leaching, microbial association, it is special
Levying and be, in described step (2), plant bionic prosthetic device filler and the kind of chemical leaching, concentration refer mainly to select mesh
Mark polluter has stronger adsorbing plant bionic prosthetic device filler, it is possible to change target Heavy Metals, Organic substance
The chemical leaching of dissolubility.
3. the method repairing place soil according to the plant bionic described in claim 1 with chemical leaching, microbial association, it is special
Levying and be, in described step (3), plant frees to repair and carries out with chemical leaching reparation simultaneously, and plant bionic prosthetic device is the most right
In soil, the polluter of solubility has good removal effect, changes heavy metal-polluted soil by chemical leaching in repair process
Form and the dissolubility of organic substance, make heavy metal-polluted soil more be converted to solubilized state, and Organic substance more transfers to water-soluble
State, increases the efficiency of plant bionic recovery technique.
4. the method repairing place soil according to the plant bionic described in claim 1 with chemical leaching, microbial association, it is special
Levying and be, in described step (4), the monitoring cycle of contaminated site is 1 month, according to concentration, the reparation effect of pollutant in soil matter
Fruit decides whether change plant bionic prosthetic device or change the concentration of chemical leaching, drip washing mode；Specific Principles is: as
Really the decline of soil characteristic pollutant levels produces a desired effect, filler enriched concentration is not reaching to saturated concentration and then plants without changing
Thing bionics prosthesis device；If filler enriched concentration reaches saturated concentration, need to change plant bionic prosthetic device；If soil
Characteristic contamination lowering of concentration is notable, and filler is also not up to saturated concentration, the kind that needs to consider to adjust chemical leaching, dense
Degree or drip washing mode.
5. the method repairing place soil according to the plant bionic described in claim 1 with chemical leaching, microbial association, it is special
Levying and be, in described step (5), in plant bionic prosthetic device, the analytic method of filler depends primarily on the property of characteristic contamination
Matter, different choice acid, alkali or heat or alternate manner according to its character desorb polluter, it is achieved the recyclable profit of filler
With.
6. the method repairing place soil according to the plant bionic described in claim 1 with chemical leaching, microbial association, it is special
Levying and be, in described step (6), chemical leaching used by combine d bioremediation is mainly environmentally friendly organic monoacid or lives in surface
Property agent, chemical leaching can be degraded by microorganisms, will not produce residual and secondary pollution.
7. the method repairing place soil according to the plant bionic described in claim 1 with chemical leaching, microbial association, it is special
Levying and be, microbial bacterial agent is mainly used in increasing the microbial degradation of chemical leaching, simultaneously can be dirty to residue character in soil
Dye material plays the effect of degraded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610841726.7A CN106180168A (en) | 2016-09-22 | 2016-09-22 | The method that plant bionic repairs place soil with chemical leaching, microbial association |
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| CN201610841726.7A CN106180168A (en) | 2016-09-22 | 2016-09-22 | The method that plant bionic repairs place soil with chemical leaching, microbial association |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552560A (en) * | 2017-08-28 | 2018-01-09 | 广州德隆环境检测技术有限公司 | A kind of method using plant combined microorganism remediation heavy-metal contaminated soil |
| CN111872089A (en) * | 2020-08-05 | 2020-11-03 | 四川淼垚森环保科技有限公司 | Partition type heavy metal contaminated soil treatment method |
| CN112474785A (en) * | 2020-12-28 | 2021-03-12 | 苏州精英环保有限公司 | Method for repairing composite polluted site by combining chemical leaching and microorganisms |
| CN112828025A (en) * | 2020-11-27 | 2021-05-25 | 苏州精英环保有限公司 | Pollute soil drip washing and sewage treatment system that integrates |
| CN115156281A (en) * | 2022-06-28 | 2022-10-11 | 广东德济环境发展有限公司 | Method for repairing soil polluted by heavy metal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112474785A (en) * | 2020-12-28 | 2021-03-12 | 苏州精英环保有限公司 | Method for repairing composite polluted site by combining chemical leaching and microorganisms |
| CN115156281A (en) * | 2022-06-28 | 2022-10-11 | 广东德济环境发展有限公司 | Method for repairing soil polluted by heavy metal |
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Effective date of registration: 20191118 Address after: 102299 516A, building 2, No. 28, Zhenxing Road, science and Technology Park, Changping District, Beijing Applicant after: Beijing Xinyuan Intelligent Water Technology Co., Ltd Address before: 100016, 10 Jiuxianqiao Road, Beijing, 2, building 1, room 003, Chaoyang District Applicant before: BEIJING XINYUAN ENVIRONMENT CO., LTD. |
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Application publication date: 20161207 |