CN108787726A - A kind of technique that chemical leaching and electronation repairing polluted soil is used in combination - Google Patents
A kind of technique that chemical leaching and electronation repairing polluted soil is used in combination Download PDFInfo
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- CN108787726A CN108787726A CN201810997156.XA CN201810997156A CN108787726A CN 108787726 A CN108787726 A CN 108787726A CN 201810997156 A CN201810997156 A CN 201810997156A CN 108787726 A CN108787726 A CN 108787726A
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- spray
- leacheate
- electronation
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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
- B09C1/08—Reclamation of contaminated soil chemically
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention discloses a kind of technique that chemical leaching and electronation repairing polluted soil is used in combination, and includes the following steps：Build spray place；Contaminated soil pre-processes and builds heap；Lay spray equipment；Leacheate is prepared in medicament pond；Implement the spray process using acid-alkali salt as leacheate, and judges whether pollutant concentration meets reparation target in soil extract；Implement the spray process using reducing agent as leacheate, judges whether pollutant concentration meets reparation target in soil extract.The spray process using water as leacheate is first carried out before executing acid-alkali salt as the spray process of leacheate.The present invention solves the problems, such as that both technologies unavoidably exist using the advantage that heap spray process incorporates electronation stabilization technology and chemical leaching technology is built.Keep the reduction of pollutant more thorough using reducing agent solution circulated sprinkling technique, while reducing a large amount of contaminants, greatly reduces the use of reducing agent, reduce environmental risk.
Description
Technical field
The invention belongs to environment remediation fields, and in particular to one kind being used in combination chemical leaching and polluted with electronation reparation
The technique of soil.
Background technology
Currently, the common recovery technique that hexavalent chromium polluted dregs is administered is mainly electronation stabilization technology and chemistry
Elution technique.And for the hexavalent chromium polluted soil of severe, since content of 6-valence Cr ions is excessively high, simple electronation stabilization technology
It is often difficult to meet to repair with chemical leaching technology and require, there are certain risk hidden danger.In engineer application, for severe six
The problems such as valence pollution of chromium dregs reduction stabilization technology is not thorough in the presence of reaction, additive amount of medicament is big, the excessive medicament of one side
Great destruction is caused to soil property, another aspect medicament and the mix unevenness of pollution dregs so that hexavalent chrome reduction is not thorough
Bottom makes repairing effect there are potential risk, and electronation stabilisation does not remove removing heavy metals fundamentally, the later stage there is also
The hidden danger of " brightness reversion ".And individually using chemical leaching technology, there is also be separated by solid-liquid separation the difficult, big (liquid-solid ratio 10 of water consumption:1~
30:1) the problems such as, soil matrix is lost in, and be difficult to directly reach reparation target, it is also desirable to fiting chemical restores stabilization technology
It uses.
Existing chemical leaching and electronation combined remediation technology, predominantly ex-situ chemical washing are stablized with electronation
The simple concatenation of change technology：Polluted soil is excavated into container, is cleaned with leacheate, the heavy metal contaminants in soil are made
It is transferred in the liquid phase where eluent, then mud-water separation is carried out to mixture, the pollutant in leacheate, can be again after disposition
Secondary to be used in rinsing step, the soil after elution such as meets control standard, then backfill or safe utilization can be carried out, after elution
Soil does not meet control standard such as, then reduction Pest By Mixing Insecticidess are added, and carries out electronation stabilization processes.This simple splicing
Joint cannot achieve maximizing favourable factors and minimizing unfavourable ones for two kinds of technologies, keep technological process excessively complicated, there are bigger difficulty for engineer application.
Invention content
In order to solve the above technical problem, the present invention provides one kind, and chemical leaching and electronation reparation pollution is used in combination
The technique of soil uses the technique for building heap spray, realizes chemical leaching and the stabilized combination of electronation.Its work
The early period of skill reduces the total amount of pollutant in dregs by shower water or other eluents, and the later stage of technique is by spraying reducing agent
To the remaining hexavalent chromium polluted further Detoxified treatment of carry out.It builds heap spray and is concentrating reduction stabilization technology and chemical leaching
While technical advantage, the problem of it is individually present is avoided.It is eluted on field in dump leaching in the technique of the present invention by being arranged
Lead layer is collected, the automatic collection guide of leacheate is realized, avoids and is separated by solid-liquid separation difficult problem in chemical leaching, is reduced
The destruction and loss of soil matrix, while spray liquid recycles after processing, be about 0.2 in liquid-solid ratio:1 or so condition
The requirement that cycle can be met down, greatly reduces water consumption, has saved resource.The present invention is sprayed by the leacheate of early period
The most water soluble hexavalent chromiums of removal and part acid soluble hexavalent chromium, use remaining Cr VI the side of reducing agent spray
Formula carries out electronation stabilisation, compared to medicament and dregs mix, using reduction liquid medicine circulated sprinkling technique Cr VI
Reduction it is more thorough, simultaneously because reducing in advance a large amount of hexavalent chromium polluted, also greatly reduce making for reduction medicament
With reducing environmental risk.
The present invention provides a kind of technique that chemical leaching and electronation repairing polluted soil is used in combination, and is particularly suitable for
The reparation of hexavalent chromium polluted soil, specifically comprises the following steps：
1) construction in place is sprayed：Spray place should carry out antiseepage, avoid secondary pollution；Spray place leakage preventing structure by
It is that solution collects lead layer, film up-protective layer, main impervious barrier, film lower protective layer and basal layer successively under.
2) contaminated soil pre-processes and builds heap：After the dregs of pollution pre-processes after crushing and screening, it is transported on spray place and builds
Heap, it is preferred that it is preferably 2~5m to build stack height.
3) spray equipment is laid above heap body to be sprayed to contaminated soil, spray system includes：Medicament pond, spray
Shower pipe road, the pump housing and solution collecting pit etc..The medicament pond connects main line one end by the pump housing, by the pump housing by medicament pond
In compound pump enter in main line, while check-valves and shut-off valve are provided on the main line, while being additionally provided with filter,
Undissolved particle or impurity in medicament pond is avoided to enter main line (diameter 50mm-70mm), the other end of the main line connects
Meet multiple bye-passes (diameter 25mm-30mm), the bye-pass top spaced apart for being set to spray place, Ge Gezhi
It is arranged at intervals with multiple nozzles on pipeline or branch pipe uses the form of floral tube, the setting of bye-pass is according to the covering for spraying place
Area is configured, and can be distributed with matts shape or circular concentric is distributed, between the height and nozzle apart from soil between
Away from or the diameter of each eyelet of floral tube can design and do not do concrete norm, be so that all soil on spray place can be sprayed
Benchmark.Wherein solution collecting pit connection solution collects the guide french drain of lead layer, can receive derived waste liquid in guide french drain
Collection, and connect sewage treatment equipment and carry out wastewater treatment, treated that water is dissolved into medicament pond makees solvent for sewage treatment equipment,
Sewage treatment equipment generally comprises medicament reaction tank, some sodium hydroxides or lime is added, pollutant is precipitated to be formed
Sludge handling, clear water reuse.
4) prepare leacheate in medicament pond, leacheate can be tap water in step 5), inorganic acid, Organic Acid and Base or
The salting liquids such as person's sodium carbonate can also make the reducing agent in step 6).By toward eluent is sprayed on mound, making in contaminated soil
Water solubility and acid-alkali salt soluble pollutants be transferred in solution, and the pollutant after reduction is transferred in solution, is passed through
Solution is collected lead layer and is imported in solution collecting pit, and waste water is can return to after processing for preparing leacheate.
5) implement leacheate spray, spraying intensity is preferably 10~40L/m2·h.During spray, at regular intervals
Sample detection.Amounts of residual contamination concentration in pollutant concentration, soil in leachates is monitored, according to monitoring analysis result,
The regime of agent and spray system of spray are set.
Preferably regime of agent and spray system is as follows：Stage spray process includes that the use water sequentially carried out is used as leaching
The spray process and inorganic acid (such as sulfuric acid) of washing lotion, organic acid (such as citric acid or oxalic acid), alkali (such as sodium hydroxide) or carbon
Spray process of the salting liquids such as sour sodium as leacheate (i.e. acid-alkali salt is as leacheate).Wherein, spray of the water as leacheate
Process can be omitted and directly carry out spray process of the acid-alkali salt as leacheate.
Wherein each stage spray process carries out data monitoring, according to process monitoring data, when pollutants removal rate reaches
When to 25% or more, stops water and enter spray process of the acid-alkali salt as leacheate as the spray process of leacheate, according to
Process monitoring data stop spray process of the acid-alkali salt as leacheate, simultaneously when pollutants removal rate reaches 70% or more
Judge that whether pollutant concentration is less than 0.5mg/L in leachate, if so, stopping repair procedure, completes entire technological process, if not
It is to carry out next step.
Leacheate ingredient does not constrain used by wherein each stage, and concentration does not also do specification, as long as can meet each
The medicament of the spray target in stage may be selected.Process is sprayed using water as the spray process of leacheate and by leacheate of acid-alkali salt
In the setting of pollutants removal rate can be determined according to the factors such as monitoring result and the economic benefit of actual motion, not with pollution
Object removal rate 25% and 70% is limitation, and during spray, and sample detection is (remaining in contaminated soil at regular intervals
Pollutant concentration can be primary with every two days sample detections, and leachates can sample daily to be detected twice), to pollutant in leachates
Amounts of residual contamination concentration is monitored in concentration, contaminated soil.
6) remaining dirty in soil to reduce after water-soluble and acid, alkali, salt soluble pollutants remove substantially in soil original sample
The risk for contaminating object, reducing solution is prepared in medicament pond, carries out the spray of reduction medicament, and leacheate uses reducing agent, can be sulphur
The reduction medicament such as sour ferrous iron, sodium sulfite, sodium hydrogensulfite, sodium pyrosulfite, according to process monitoring data, at regular intervals
(amounts of residual contamination concentration can be primary with every two days sample detections in contaminated soil, and leachates can sample two daily for sample detection
Secondary detection), meet reparation target when soil leaches pollutant concentration (pollutant concentration is less than 0.5mg/L in such as soil extract)
Afterwards, stop spray.By toward spraying reducing agent on mound, for the pollutant for being difficult to remove, pollutant remaining in soil, make
Pollutant remaining in contaminated soil is reduced to the trivalent chromium of hypotoxicity, low migration with reduction means, realizes contaminated soil
Thorough removing toxic substances.
Preferably, in the process operating parameter (including the time of spray, spraying intensity, the type of leacheate and concentration etc.)
Adjusting and optimizing appropriate should be carried out according to process monitoring data.Process above is suitable for the reparation of hexavalent chromium polluted soil, also fits
For the reparation of other heavy-metal contaminated soils, when the reparation suitable for hexavalent chromium polluted soil, pollutant described above is
Cr VI.
Present invention has the advantage that：
The present invention is solved using the advantage that heap spray process incorporates electronation stabilization technology and chemical leaching technology is built
The problem of both technologies of having determined unavoidably exist.It builds heap spray process not limited by equipment disposal ability, greatly contract
The short construction period.Heap spray renovation technique is built simultaneously with easy to operate, resource-effective, secondary pollution is small, high degree of automation
The features such as, and the spray place in the present invention enables leacheate to collect guide automatically, eliminates what soil was detached with waste water
Difficulty, it is easy to operate, process runs well is reliable, the production that can greatly be shortened the construction period, save cost, avoiding secondary pollution
It is raw.The present invention keeps the reduction of pollutant (such as Cr VI) more thorough using reducing agent solution circulated sprinkling technique, simultaneously because
It reduces in advance a large amount of hexavalent chromium polluted, also greatly reduces the use of reducing agent, reduce environmental risk, also as far as possible
Avoid the destruction to soil property.Therefore heap spray renovation technique provided by the invention of building is a kind of renovation technique of green,
It can realize the removal of pollutant and the stabilized perfect adaptation of amounts of residual contamination, it, can be maximum to the greatest extent when handling contaminated soil
Pollutant in possible reduction soil further carries out stabilization processes to remaining a small amount of pollutant, and repairing effect is more
Stablize.
Description of the drawings
Fig. 1 is the technique stream provided by the invention that chemical leaching and the repairing hexavalent chromium polluted soil of electronation is used in combination
Cheng Tu；
Fig. 2 is the structural schematic diagram of spray system in the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
The present embodiment provides a kind of techniques that chemical leaching and the repairing hexavalent chromium polluted soil of electronation is used in combination, such as
Shown in Fig. 1, specifically comprise the following steps：
1) spray place 8 is built：The leakage preventing structure of spray field is from top to bottom that solution is collected lead layer, protected on film successively
Layer, main impervious barrier, film lower protective layer and basal layer；
The solution collects lead layer by guide french drain 10 in field (completely spreading rubble, guide floral tube), 9 and of surrounding intercepting ditch
Concrete topping is constituted；Wherein guide french drain 10 is formed among concrete topping, by guide french drain 10, makes to flow into heap body
Liquid collect and flow out through guide french drain 10, surrounding intercepting ditch 9 is formed in concrete topping surrounding, and connects with guide french drain 10
It connects, the liquid in guide french drain 10 is passed through into the intercepting ditch 9 assembly and water conservancy diversion.
The film up-protective layer can select geotextiles or bentonite blanket, and 600g/m is selected in this example2Nonwoven geotechnique
Cloth is as film up-protective layer；
HDPE geomembranes are selected in the main impervious barrier suggestion, select 1.5mm thickness HDPE geomembranes as master in this example
Impervious barrier；
The film lower protective layer can select clay, geotextiles or bentonite blanket, and 600g/m is selected in this example2Nonwoven
Geotextiles are as film lower protective layer；
The basal layer needs to be compacted and ensure the smooth of surface.
2) contaminated soil pre-processes and builds heap：Crushing and screening is carried out to the contaminated soil digged up clearly.It is used in this example
ALLU crushing and screening buckets carry out the crushing and screening of contaminated soil.Contaminated soil is transported to the spray place 8 constructed by step 1)
On build heap, form heap body 11.
3) spray equipment is laid above heap body 11 to be sprayed to contaminated soil, spray system is as shown in Fig. 2, packet
It includes：Medicament pond 1, spray pipeline, the pump housing 16 and solution collecting pit 3 etc..The medicament pond 1 connects main line 5 by the pump housing 16
One end is entered the compound pump in medicament pond 1 in main line by the pump housing 16, at the same be provided on the main line check-valves 14,
Flowmeter 15, the pump housing 16 are provided at both ends with entrance door 17 and outlet portal 18, to form the switch of main line 5, also set up simultaneously
There is filter 12, undissolved particle or impurity in medicament pond 1 is avoided to enter main line 5 (diameter 50mm-70mm), the supervisor
The other end on road 5 connects multiple bye-passes 6 (diameter 25mm-30mm), and the bye-pass 6 is spaced apart to be set to spray field
The top on ground 8 is arranged at intervals with the form of multiple nozzles 7 or bye-pass 6 using floral tube on each bye-pass 6, bye-pass 6
It is arranged and is configured according to the area coverage in spray place, can be distributed with matts shape or circular concentric is distributed, apart from heap body
The diameter of each eyelet of spacing or floral tube between 11 height and nozzle 7, which can design, does not do concrete norm, with can
It sprays on spray place 8 on the basis of all soil.Wherein solution collecting pit 3 connects the guide french drain 10 that solution collects lead layer
(guide french drain 10 converges the intercepting ditch 9 with surrounding, and guide french drain 10 is indirectly connected with by connecting intercepting ditch 9), can be by guide
Derived waste collection in french drain 10, and connect sewage treatment equipment 2 and carry out wastewater treatment, treated for sewage treatment equipment 2
Water, which is dissolved into medicament pond 1, makees solvent, and sewage treatment equipment 2 generally comprises medicament reaction tank, be added some sodium hydroxides or
Lime precipitates Cr VI to form bed mud, carries out sludge treatment, clear water reuse.
4) spray operation：Cr VI total amount is 5670mg/kg in soil used in this example, and wherein water soluble hexavalent chromium accounts for
Than 22.75%, acid soluble hexavalent chromium accounting 40.92%, this example is according to contaminated soil property and small-scale experiment design early period fortune
Capable regime of agent and spray system.Spraying intensity is preferably 10~40L/m2H, spraying intensity is 20L/m in this example2H is left
It is right.First stage sprays process leacheate and selects tap water, according to process monitoring data, when hexavalent chromium removal rate reach 25% with
When upper, stopped first stage spray process and opened second stage spray process.Second stage spray process is changed to spray inorganic
The leacheate of the salting liquids such as acid, Organic Acid and Base or sodium carbonate compounds environmentally protective salting liquid (such as sodium carbonate in the present embodiment
With the mixed solution of sodium sulphate, the wherein mass ratio of sodium carbonate and sodium sulphate meets 3:1-5:Between 1, in specific mixed solution
The concentration of sodium carbonate and sodium sulphate does not do specification, can constantly be adjusted according to elution effect) as elution medicament, it is supervised according to process
Measured data stops second stage spray process and opens the phase III and sprayed when hexavalent chromium removal rate reaches 70% or more
Journey.Phase III sprays process and sprays reducing solution, and reducing agent can be ferrous sulfate, sodium sulfite, sodium hydrogensulfite, burnt sulfurous
Sour sodium etc. restores medicament, in this example using ferrous sulfate solution (common chemical field uses concentration, concentration not to do specification,
And the concentration of the solution is constantly adjusted according to monitoring data in repair process) and as reduction medicament, according to process monitoring data,
When Cr VI total amount in soil and soil leach hexavalent chromium concentration satisfaction reparation target, (hexavalent chromium concentration is less than in leachate
After 0.5mg/L), stop phase III spray.
In the present embodiment, after spray is run 1 month, final soil uses《Solid waste Leaching leaching method is overturn
Method》(GB5086.1-1997) leachate is prepared, hexavalent chromium concentration is less than 0.5mg/L in leachate, reaches reparation target.
It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of technique that chemical leaching and electronation repairing polluted soil is used in combination, which is characterized in that specifically include as
Lower step：
1) spray place is built；
2) contaminated soil pre-processes and builds heap；
3) spray equipment is laid above mound；
4) leacheate is prepared in medicament pond；
5) implement spray process using acid-alkali salt as leacheate, and judge in soil extract whether pollutant concentration meets and repair
Complicated target is such as unsatisfactory for carrying out next step；
6) implement the spray process using reducing agent as leacheate, judge whether pollutant concentration meets reparation in soil extract
Target is such as unsatisfactory for, and continues to implement this step, and target is repaired until meeting.
2. the technique according to claim 1 that chemical leaching and electronation repairing polluted soil is used in combination, feature
It is, the step 5) can first carry out before executing acid-alkali salt as the spray process of leacheate using water as leacheate
Spray process.
3. the technique according to claim 1 that chemical leaching and electronation repairing polluted soil is used in combination, feature
It is, ruler diameter is less than 4cm after the contaminated soil pretreatment pre-processes after crushing and screening for the dregs of pollution, is transported to spray place
On build heap, build stack height be 2~5m.
4. the technique according to claim 1 or 2 that chemical leaching and electronation repairing polluted soil is used in combination, special
Sign is that the spraying intensity of the spray process in each stage is 10~40L/m2·h；When spray of the execution using water as leacheate
Cheng Shi stops water spray when the pollutants removal rate of contaminated soil reaches 25% or more, into acid-alkali salt as leacheate
Spray process stops spray when the pollutants removal rate of contaminated soil reaches 70% or more, while judging in soil extract
Whether pollutant concentration meets reparation target, stops renovation technique if meeting, is such as unsatisfactory for entering step 6).
5. the technique according to claim 1 that chemical leaching and electronation repairing polluted soil is used in combination, feature
It is, the acid-alkali salt is that inorganic acid, Organic Acid and Base or sodium carbonate are molten as the leacheate during the spray of leacheate
Liquid；The reducing agent is ferrous sulfate, sodium sulfite, sodium hydrogensulfite or sodium pyrosulfite.
6. the technique according to claim 1 or 2 that chemical leaching and electronation repairing polluted soil is used in combination, special
Sign is, during each spray, carries out in contaminated soil pollutant concentration in amounts of residual contamination Concentration Testing and leachates
It detects, according to testing result the spray medicament kind and concentration and spraying intensity of continuous adjustment leacheate.
7. a kind of being used in combination chemical leaching and the technique of electronation repairing polluted soil suitable for described in claim 1
Spray place, which is characterized in that the spray place have leakage preventing structure, from top to bottom successively include solution collection lead layer,
Film up-protective layer, main impervious barrier, film lower protective layer and basal layer.
8. according to claim 7 be suitable for that chemical leaching and the technique of electronation repairing polluted soil is used in combination
Spray place, which is characterized in that the solution is collected lead layer and is made of concrete topping, is provided in the concrete topping
Guide french drain in, surrounding are provided with intercepting ditch；The film up-protective layer selects geotextiles or bentonite blanket；The master is anti-
Infiltration layer selects HDPE geomembranes；The film lower protective layer selects clay, geotextiles or bentonite blanket；The basal layer is through overvoltage
Real and surface treatment.
9. the spray field according to claim 8 that chemical leaching and the technique of electronation repairing polluted soil is used in combination
Ground, which is characterized in that the spray place, which is also arranged in pairs or groups, is provided with spray system, and the spray system includes medicament pond, spray tube
Road, the pump housing and solution collecting pit；The spray pipeline includes main line and bye-pass, and the medicament pond is connected by the pump housing
Main line one end is entered the compound pump in medicament pond in main line by the pump housing, and the other end of the main line connects multiple
Pipeline, the bye-pass are set to the top in spray place, multiple nozzles are arranged at intervals on each bye-pass or using flower
The bye-pass of form of tubes, the solution collecting pit connection solution are collected the guide french drain of lead layer, can will be led in guide french drain
The waste collection gone out, and connect sewage treatment equipment and carry out wastewater treatment, treated that water is dissolved into medicament for sewage treatment equipment
Reuse in pond.
10. the technique according to claim 9 that chemical leaching and electronation repairing polluted soil is used in combination, feature
It is, check-valves is provided on the main line, while being additionally provided with filter；A diameter of 50mm-70mm of the main line,
UPVC, PE or PPR pipe, a diameter of 25mm-30mm of the bye-pass is selected to select PE pipes, and branch pipe uses convenient for operation
The hose of middle dismounting and adjustment nozzle cloth point.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997156.XA CN108787726B (en) | 2018-08-29 | 2018-08-29 | Process for restoring polluted soil by combining chemical leaching and chemical reduction |
| PCT/CN2018/110091 WO2020042291A1 (en) | 2018-08-29 | 2018-10-12 | Process for remediation of contaminated soil using chemical elution and chemical reduction in combination |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997156.XA CN108787726B (en) | 2018-08-29 | 2018-08-29 | Process for restoring polluted soil by combining chemical leaching and chemical reduction |
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| CN108787726B CN108787726B (en) | 2020-12-11 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109454102A (en) * | 2019-01-04 | 2019-03-12 | 北京高能时代环境技术股份有限公司 | A kind of elution of chromium slag contaminated soil-stabilisation combined remediation method |
| CN110142287A (en) * | 2019-05-27 | 2019-08-20 | 安徽建筑大学 | Oxidation potential water leaching remediation method for soil polluted by persistent organic matters |
| CN111438178A (en) * | 2020-04-27 | 2020-07-24 | 上海清澄环保技术有限公司 | Soil leaching treatment method |
| CN111715686A (en) * | 2020-06-30 | 2020-09-29 | 江南大学 | Cadmium-polluted soil leaching device and operation method thereof |
| CN113333449A (en) * | 2021-07-22 | 2021-09-03 | 湖南中森环境科技有限公司 | Leaching equipment and leaching method for high-concentration heavy metal contaminated soil |
| CN113399445A (en) * | 2021-07-14 | 2021-09-17 | 河北科技大学 | Method for efficiently leaching and repairing chromium-contaminated soil |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004275899A (en) * | 2003-03-17 | 2004-10-07 | Sumikon Serutekku Kk | Clarification method for contaminated soil |
| CN102500612A (en) * | 2011-10-28 | 2012-06-20 | 中南大学 | Chemical leaching restoring method for soil polluted by heavy metals |
| CN103316903A (en) * | 2013-03-21 | 2013-09-25 | 珠海市中科信息技术开发有限公司 | Method for repairing heavy metal polluted soil by chemical combined leaching |
| WO2014059540A1 (en) * | 2012-10-18 | 2014-04-24 | Englobe Corp. | Salt-impacted soil treatment process and system for remediating a salt-impacted soil |
| CN104550222A (en) * | 2014-11-27 | 2015-04-29 | 中南大学 | Microbial leaching and chemical fixing joint repairing method for heavily polluted soil of chromium slag yard |
| CN104959376A (en) * | 2015-05-20 | 2015-10-07 | 湖南永清环保研究院有限责任公司 | Restoration method of chromium-polluted soil |
| EP2726224B1 (en) * | 2011-07-01 | 2016-02-10 | Cleanfield Danmark ApS | Method of purifying soil through heap percolation |
| CN105598148A (en) * | 2016-02-04 | 2016-05-25 | 周益辉 | Method for repairing volatile organic matter and heavy metal chromium combined polluted soil |
| CN105964670A (en) * | 2016-07-05 | 2016-09-28 | 湖南艾布鲁环保科技有限公司 | Device and method for recycling ex-site chemical elution-remediating eluate for heavy metal contaminated soil |
| CN106238451A (en) * | 2016-10-12 | 2016-12-21 | 北京高能时代环境技术股份有限公司 | A kind of waste residue containing heavy metal or the drip washing technique of soil and device |
| CN106345801A (en) * | 2016-11-18 | 2017-01-25 | 北京高能时代环境技术股份有限公司 | Dump leaching restoration system and restoration process of chromium pollution soil |
| CN206153282U (en) * | 2016-10-12 | 2017-05-10 | 北京高能时代环境技术股份有限公司 | Contain waste residue of heavy metal or washing device of soil |
| CN106623389A (en) * | 2016-12-06 | 2017-05-10 | 天津华勘环保科技有限公司 | Remediation method for cyanide contaminated soil |
| CN107583947A (en) * | 2017-08-17 | 2018-01-16 | 天津华勘环保科技有限公司 | Heavy-metal contaminated soil builds heap cycling elution restorative procedure |
| CN107855359A (en) * | 2017-06-20 | 2018-03-30 | 青岛华茂环保科技有限公司 | A kind of quick method of the disposal containing chromium soil |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003047946A (en) * | 2001-08-06 | 2003-02-18 | Maeda Kosen Co Ltd | Reducing member and method for manufacturing the same |
| JP2008279403A (en) * | 2007-05-14 | 2008-11-20 | Shimizu Corp | In situ cleaning method of contaminated soil and contaminated underground water |
| CN104741373B (en) * | 2015-04-03 | 2018-04-13 | 北京建工环境修复股份有限公司 | A kind of layering restorative procedure of chromium-polluted soil |
| CN107159698B (en) * | 2017-06-09 | 2020-07-28 | 航天凯天环保科技股份有限公司 | Method for in-situ remediation of heavy metal contaminated soil by three-dimensional well leaching combined stabilization |
| CN107745001B (en) * | 2017-10-16 | 2021-02-12 | 北京高能时代环境技术股份有限公司 | Repairing method of hexavalent chromium polluted building garbage |
-
2018
- 2018-08-29 CN CN201810997156.XA patent/CN108787726B/en active Active
- 2018-10-12 WO PCT/CN2018/110091 patent/WO2020042291A1/en active Application Filing
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004275899A (en) * | 2003-03-17 | 2004-10-07 | Sumikon Serutekku Kk | Clarification method for contaminated soil |
| EP2726224B1 (en) * | 2011-07-01 | 2016-02-10 | Cleanfield Danmark ApS | Method of purifying soil through heap percolation |
| CN102500612A (en) * | 2011-10-28 | 2012-06-20 | 中南大学 | Chemical leaching restoring method for soil polluted by heavy metals |
| WO2014059540A1 (en) * | 2012-10-18 | 2014-04-24 | Englobe Corp. | Salt-impacted soil treatment process and system for remediating a salt-impacted soil |
| CN103316903A (en) * | 2013-03-21 | 2013-09-25 | 珠海市中科信息技术开发有限公司 | Method for repairing heavy metal polluted soil by chemical combined leaching |
| CN104550222A (en) * | 2014-11-27 | 2015-04-29 | 中南大学 | Microbial leaching and chemical fixing joint repairing method for heavily polluted soil of chromium slag yard |
| CN104959376A (en) * | 2015-05-20 | 2015-10-07 | 湖南永清环保研究院有限责任公司 | Restoration method of chromium-polluted soil |
| CN105598148A (en) * | 2016-02-04 | 2016-05-25 | 周益辉 | Method for repairing volatile organic matter and heavy metal chromium combined polluted soil |
| CN105964670A (en) * | 2016-07-05 | 2016-09-28 | 湖南艾布鲁环保科技有限公司 | Device and method for recycling ex-site chemical elution-remediating eluate for heavy metal contaminated soil |
| CN106238451A (en) * | 2016-10-12 | 2016-12-21 | 北京高能时代环境技术股份有限公司 | A kind of waste residue containing heavy metal or the drip washing technique of soil and device |
| CN206153282U (en) * | 2016-10-12 | 2017-05-10 | 北京高能时代环境技术股份有限公司 | Contain waste residue of heavy metal or washing device of soil |
| CN106345801A (en) * | 2016-11-18 | 2017-01-25 | 北京高能时代环境技术股份有限公司 | Dump leaching restoration system and restoration process of chromium pollution soil |
| CN106623389A (en) * | 2016-12-06 | 2017-05-10 | 天津华勘环保科技有限公司 | Remediation method for cyanide contaminated soil |
| CN107855359A (en) * | 2017-06-20 | 2018-03-30 | 青岛华茂环保科技有限公司 | A kind of quick method of the disposal containing chromium soil |
| CN107583947A (en) * | 2017-08-17 | 2018-01-16 | 天津华勘环保科技有限公司 | Heavy-metal contaminated soil builds heap cycling elution restorative procedure |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109454102A (en) * | 2019-01-04 | 2019-03-12 | 北京高能时代环境技术股份有限公司 | A kind of elution of chromium slag contaminated soil-stabilisation combined remediation method |
| CN110142287A (en) * | 2019-05-27 | 2019-08-20 | 安徽建筑大学 | Oxidation potential water leaching remediation method for soil polluted by persistent organic matters |
| CN110142287B (en) * | 2019-05-27 | 2020-11-27 | 安徽建筑大学 | Oxidation potential water leaching remediation method for soil polluted by persistent organic matters |
| CN111438178A (en) * | 2020-04-27 | 2020-07-24 | 上海清澄环保技术有限公司 | Soil leaching treatment method |
| CN111715686A (en) * | 2020-06-30 | 2020-09-29 | 江南大学 | Cadmium-polluted soil leaching device and operation method thereof |
| CN113399445A (en) * | 2021-07-14 | 2021-09-17 | 河北科技大学 | Method for efficiently leaching and repairing chromium-contaminated soil |
| CN113333449A (en) * | 2021-07-22 | 2021-09-03 | 湖南中森环境科技有限公司 | Leaching equipment and leaching method for high-concentration heavy metal contaminated soil |
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| CN108787726B (en) | 2020-12-11 |
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