CN110357241A - The method for repairing underground water using permeable reactive barrier - Google Patents
The method for repairing underground water using permeable reactive barrier Download PDFInfo
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- CN110357241A CN110357241A CN201910759743.XA CN201910759743A CN110357241A CN 110357241 A CN110357241 A CN 110357241A CN 201910759743 A CN201910759743 A CN 201910759743A CN 110357241 A CN110357241 A CN 110357241A
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- injection
- underground water
- water
- charcoal
- permeable reactive
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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
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Soil Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The method for repairing underground water using permeable reactive barrier, nano zero-valence iron powder is added to the water, after agitation grinding, nano zero valence iron slurries is placed in plastic barrel and are further activated；Charcoal is added in water simultaneously, dissolution is sufficiently stirred and forms charcoal slurries；Above two slurries are added separately in the Aluminum Drum equipped with quantitative charger after sufficiently activating, and mixed serum is injected underground water by direct-push or hydraulic type respectively by adjustment quantitative charger；According to underground water buried depth 3-6m, the repair coverage position 1.5-2.5m of material, by injecting to form permeable reactive barrier in 3.5m, 4.5 m and 5.5 m respectively；Meanwhile Micropump monitoring well Stratified Sampling system is laid, depth needed for obtaining and water-bearing layer water sample.
Description
Technical field
The present invention relates to contaminated site underground water pollutions to repair field, and in particular to a kind of to utilize permeable reactive barrier reparation
The method of underground water.
Background technique
Nano zero valence iron is widely used in polluted underground water recovery project as a kind of efficient reproducibility repair materials,
Its application in environment remediation field has had 15 years history.It can be used as the processing of the filler in underground water permeable reactive barrier
Pollution Plume can also be injected directly into and be lauched removal pollution sources in high concentration, can efficiently remove including organic chlorinatedorganic,
The multiple pollutants such as heavy metal and nitrate.Nano zero valence iron maximum advantage during processing environment pollutant is particle
Large specific surface area, reactivity height, fast degradation pollutant, especially in the higher situation of pollutant concentration, Nanoscale Iron pair
The removal rate of pollutant is much higher than plain particles iron powder.However there are also defects in the application for nano zero valence iron: as being easy
Agglomeration occurs, reduces its specific surface area and reactivity；It is poor in underground water migration, it is easy precipitating, in underground water
Scheduled processing region cannot be reached in in-situ injection technology, blocking easy to form and nano zero valence iron table in water-bearing layer
The hydrophobicity in face is poor, it is not easy to and nonpolar organic pollutants react etc., these limit its rule in engineering
Mould application.Charcoal as the product after biological residuum high temperature pyrolysis, have stability is high, specific surface area and porosity is big, from
The features such as sub- exchange capacity is strong, the improvement of soil quality, pollutant it is fixed with locking so that greenhouse gases in terms of
All show good application prospect.The stability (more than one thousand years can be stabilized in the soil) of charcoal height, very great Cheng
Reduce the environmental risk that pollutant discharges again on degree.Iron-carbon composite has the pollutant in removal environment certain
Broad spectrum activity, be suitable for the improvement of multiple pollutant, and do not limited by characteristics on Aquifer, the period of processing is short.This height
The underground water in-situ immobilization reagent of effect is used widely in America and Europe.The U.S. was researched and developed since 2000, at present more than 80
A place has carried out pilot scale and scale application；European Union the 7th frame is started in 2013 and is taken the lead by Stuttgart University, Germany,
The soil that 1,400,000,000 Euro of cost and underground water Nanoscale Iron recovery technique application item (NANOREM), in Switzerland, Czech, with
Color column, 6 contaminated sites such as Portugal and Germany are demonstrated.Nano zero valence iron recovery technique does not obtain weight also in China
Depending on needing further research and extension, being closed especially for China's typical case's industry, region, complex geological condition and exemplary complex
Pollutant is infused, research and development are suitable for serious pollution source (containing free phase) underground water Nanoscale Iron recovery technique system in situ.
Permeable reactive barrier technology is a kind of groundwater remediation technology of infiltration processing band in situ as reparation theme, utilization
Specific reaction medium removes the multiple pollutant in underground water by physics, chemistry and biodegradable method.The technology is
Through being widely applied in Europe and North America, more than 100 permeable reactive barriers are established.Traditional permeable reactive barrier needs
Walling is excavated, the diffusion of volatile pollutant is easy to cause, leads to secondary pollution and the generation of Environment Pollution Event.China is close
Since pollutant time of leaking caused by excavating occurs again and again over year, to hinder permeable reactive barrier in the application in China.
In-situ injection technology does not need to excavate, while selective injection can be carried out according to the distribution of pollutant concentration, can make up permeable
Reaction wall needs the defect excavated.Therefore, novel permeable reactive barrier technology body can be constructed by a variety of in-situ injection technologies
System breaks through the bottleneck that permeable reactive barrier technology is applied in China, provides new thinking for contaminated site groundwater remediation and be
System solution.
Summary of the invention
The technical issues of solution: being easy to happen agglomeration for nano zero valence iron itself, cause to reduce its specific surface area,
The problems such as reactivity, stability, the present invention provides a kind of method for repairing underground water using permeable reactive barrier, using than table
Area is big, pore structure charcoal abundant is as nano zero-valence siderophore, solves nano zero valence iron since reuniting effect drops
The bottleneck of its low degradation efficiency.Big in China's excavation risk for permeable reactive barrier simultaneously, the high bottleneck of difficulty of construction proposes
It directly injects to penetrate and constructs novel permeable reactive barrier with hydraulic type injection and repair the technical solution of underground water chlorohydrocarbon pollution, and lead to
It crosses using multilayer position micro pump technology monitor and repairing material transport dynalnics and treatment effect, it is fixed to form accurate investigation-qualitative assessment-
To injection-stereoscopic monitoring in-situ immobilization engineering mode and equipment.
Technical solution: a method of underground water, step are as follows: in proportion, by 10-20 are repaired using permeable reactive barrier
Kg nano zero-valence iron powder is added in 100 L-200L water, and after agitation grinding 1h, nano zero valence iron slurries are placed on plastics
12-24h is further activated in bucket；10-20 kg charcoal is added in the water of 50L simultaneously, dissolution is sufficiently stirred and forms charcoal
Slurries；Above two slurries are added separately in the Aluminum Drum equipped with quantitative charger after sufficiently activating, adjustment quantitative charger, with iron
After the ratio mixing of charcoal ratio 1:1-1:5, mixed serum is injected by underground water by direct-push or hydraulic type respectively；It is described directly to push away
Formula is injected into underground water by Geoprobe, and injection pressure range is 20-80 bar, and injection rate is 1-3 m3/h；Institute
Stating hydraulic type injection is injected into underground water by Packer, and injection pressure range is 0-10 bar, injection rate 0.5-
1.5 m3/h；The injection depth of two kinds of injection systems are as follows: 3-5 m, the depth of injection is according to the buried depth of underground water and repairing for material
Range is answered to formulate, according to underground water buried depth 3-6m, the repair coverage position 1.5-2.5m of material, by respectively in 3.5m, 4.5 m
It injects to form permeable reactive barrier with 5.5 m；Meanwhile Micropump monitoring well Stratified Sampling system is laid, required depth is obtained and is contained
Water layer water sample；The reaction wall is made of 3-5 row's injection point, and the spacing of every row is 1.5-3.0m.
Preferably, above-mentioned nano zero valence iron and charcoal mixed proportion are 1:1.
The utility model has the advantages that the present invention using large specific surface area, pore structure charcoal abundant as nano zero-valence siderophore,
Nano zero valence iron is solved since reuniting effect reduces the bottleneck of its degradation efficiency, is proposed multiple with nano zero valence iron-charcoal
Layering injection constructs technical solution and pass that novel permeable reactive barrier technology repairs the pollution of underground water chlorohydrocarbon to condensation material in situ
Key technology index, the technical system are combined using direct-push and mobile hydraulic type Packer technology and are injected into ground for composite material
Be lauched pollution layer position, and use multilayer position micro pump technology monitor and repairing material transport dynalnics and treatment effect, form it is reproducible,
Propagable accurate investigation-qualitative assessment-orientation injection-stereoscopic monitoring underground water chlorohydrocarbon pollution amelioration engineering mode in situ
And equipment, the control of plot environmental risk is polluted for China and security development utilizes and provides typical project example.
Detailed description of the invention
Fig. 1 is nano zero valence iron-charcoal composite material permeable reactive barrier application technique system schematic diagram.
Specific embodiment
The present invention is further illustrated below by way of example:
Embodiment 1:
A kind of nano zero valence iron-biology carbon composite preparation and in-situ injection technical system, by nano zero valence iron and charcoal
Activate it is compound after, using directly pushing away and two kinds of in-situ injection technologies of hydraulic type and Micropump monitoring system carry out the injection of multilayer position and solid
Monitoring, forms novel permeable reactive barrier application technique system.Composite material preparation and its application of novel permeable reactive barrier
System the following steps are included:
Firstly, 10 kg nano zero-valence iron powders are added in 100 kg water, after agitation grinding 1h, by nano zero valence iron slurries
It is placed in plastic barrel and further activates 12h.10 kg charcoals are added in the water of 50L simultaneously, dissolution is sufficiently stirred and forms life
Object charcoal slurries.Two kinds of materials are added separately in the Aluminum Drum equipped with quantitative charger after sufficiently activating, adjustment quantitative charger, with iron
After the ratio mixing of charcoal ratio 1:2, composite material slurries are formed.
Mixed serum is injected into underground water by direct-push and mobile hydraulic type two ways.Direct-push injection is to pass through
Geoprobe drilling machine is completed, and injection pressure range is 30 bar, and injection rate is 1.5 m3/h.Hydraulic type injection is to pass through
Mixed serum is injected into heavy caliber groundwater monitoring well by Packer system, and injection pressure range is 5 bar, and injection rate is
1.0 m3/h.The injection depth of two kinds of injection systems is all respectively as follows: 3.5m, 4.5m and 5.5m.Before the injection, Micropump prison is laid
It surveys and carries out the sampling of multilayer position, it is 3.5 m, 4.5 m and 5.5 m that depth is laid in Micropump Stratified Sampling.With reference to the accompanying drawings, reaction wall is by 3
It arranges injection point to constitute, the spacing of every row is 3.0m, and two kinds of injection systems carry out simultaneously.
Trichloro ethylene concentration is up to 20000 μ g/L before composite material is injected, after repairing 28 days, the trichlorine of all well locations
Ethylene concentration, which all drops to, repairs target value (291 μ g/L) below.
Embodiment 2:
A kind of nano zero valence iron-biology carbon composite preparation and in-situ injection technical system, by nano zero valence iron and charcoal
Activate it is compound after, using directly pushing away and two kinds of in-situ injection technologies of hydraulic type and Micropump monitoring system carry out the injection of multilayer position and solid
Monitoring, forms novel permeable reactive barrier application technique system.Composite material preparation and its application of novel permeable reactive barrier
System the following steps are included:
Firstly, 15 kg nano zero-valence iron powders are added in 100 kg water, after agitation grinding 1h, by nano zero valence iron slurries
It is placed in plastic barrel and further activates 24 h.20 kg charcoals are added in the water of 50L simultaneously, dissolution is sufficiently stirred and is formed
Charcoal slurries.Two kinds of materials are added separately in the Aluminum Drum equipped with quantitative charger after sufficiently activating, adjustment quantitative charger, with
After the ratio mixing of iron carbon ratio 1:1, composite material slurries are formed.
Mixed serum is injected into underground water by direct-push and hydraulic type two ways.Direct-push injection is to pass through
Geoprobe drilling machine is completed, and injection pressure range is 50 bar, and injection rate is 2.0 m3/h.Hydraulic type injection is to pass through
Mixed serum is injected into heavy caliber groundwater monitoring well by Packer system, and injection pressure range is 5 bar, and injection rate is
1.0 m3/h.The injection depth of two kinds of injection systems is all respectively as follows: 3.5m, 4.5m and 5.5m.Before the injection, Micropump prison is laid
It surveys and carries out the sampling of multilayer position, it is 3.5 m, 4.5 m and 5.5 m that depth is laid in Micropump Stratified Sampling, and reaction wall is by 4 row's injection point structures
At the spacing of every row is 2.0m, and two kinds of injection systems carry out simultaneously.
Trichloro ethylene concentration is up to 2000 μ g/L before injecting, and after repairing 21 days, the trichloro ethylene concentration of all well locations is all
It drops to and repairs target value (190 μ g/L) below.
Embodiment 3:
A kind of nano zero valence iron-biology carbon composite preparation and in-situ injection technical system, by nano zero valence iron and charcoal
Activate it is compound after, using directly pushing away and two kinds of in-situ injection technologies of hydraulic type and Micropump monitoring system carry out the injection of multilayer position and solid
Monitoring, forms novel permeable reactive barrier application technique system.Composite material preparation and its application of novel permeable reactive barrier
System the following steps are included:
Firstly, 10 kg nano zero-valence iron powders are added in 100 kg water, after agitation grinding 1h, by nano zero valence iron slurries
It is placed in plastic barrel and further activates 16 h.20 kg charcoals are added in the water of 50L simultaneously, dissolution is sufficiently stirred and is formed
Charcoal slurries.Two kinds of materials are added separately in the Aluminum Drum equipped with quantitative charger after sufficiently activating, adjustment quantitative charger, with
After the ratio mixing of iron carbon ratio 1:5, composite material slurries are formed.
Mixed serum is injected into underground water by direct-push and hydraulic type two ways.Direct-push injection is to pass through
Geoprobe drilling machine is completed, and injection pressure range is 30 bar, and injection rate is 1.5 m3/h.Hydraulic type injection is to pass through
Mixed serum is injected into heavy caliber groundwater monitoring well by Packer system, and injection pressure range is 5 bar, and injection rate is
0.5 m3/h.The injection depth of two kinds of injection systems is all respectively as follows: 3.5m, 4.5m and 5.5m.Before the injection, Micropump prison is laid
It surveys and carries out the sampling of multilayer position, it is 3.5 m, 4.5 m and 5.5 m that depth is laid in Micropump Stratified Sampling.Reaction wall is by 5 row's injection point structures
At the spacing of every row is 3.0m, and two kinds of injection systems carry out simultaneously.VOCs concentration is up to 250000 μ g/L before injecting, and is repaired
After 28 days multiple, the VOCs concentration of all well locations reduces by 90% or more.
The above is only the citing of embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the technical principles of the invention, several improvement can also be made, these improvement also should be regarded as this
The protection scope of invention.
Claims (2)
1. a kind of method for repairing underground water using permeable reactive barrier, it is characterised in that step are as follows: in proportion, by 10-20 kg
Nano zero-valence iron powder is added in 100 L-200L water, and after agitation grinding 1h, nano zero valence iron slurries are placed on plastic barrel
In further activate 12-24h；10-20 kg charcoal is added in the water of 50L simultaneously, dissolution is sufficiently stirred and forms charcoal slurry
Liquid；Above two slurries are added separately in the Aluminum Drum equipped with quantitative charger after sufficiently activating, adjustment quantitative charger, with iron charcoal
After ratio mixing than 1:1-1:5, mixed serum is injected by underground water by direct-push or hydraulic type respectively；The direct-push
It is to be injected into underground water by Geoprobe, injection pressure range is 20-80 bar, and injection rate is 1-3 m3/h；It is described
Hydraulic type injection is injected into underground water by Packer, and injection pressure range is 0-10 bar, injection rate 0.5-1.5
m3/h；The injection depth of two kinds of injection systems are as follows: 3-5 m, the depth of injection is according to the buried depth of underground water and the reparation model of material
Enclose to formulate, according to underground water buried depth 3-6m, the repair coverage position 1.5-2.5m of material, by respectively in 3.5m, 4.5 m and
5.5 m inject to form permeable reactive barrier；Meanwhile cloth is set as the Micropump monitoring well Stratified Sampling system of specific place customization, obtains
Take required depth and water-bearing layer water sample；The reaction wall is made of 3-5 row's injection point, and the spacing of every row is 1.5-3.0m.
2. the method for repairing underground water using permeable reactive barrier according to claim 1, it is characterised in that the nanometer zero
Valence iron and charcoal mixed proportion are 1:1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115636460A (en) * | 2022-09-28 | 2023-01-24 | 昆明理工大学 | Method for in-situ remediation of heavy metal-organic composite polluted groundwater by using electrochemically-enhanced permeable reactive barrier |
| CN116274312A (en) * | 2022-10-17 | 2023-06-23 | 中国科学院南京土壤研究所 | Method for in-situ restoration and control of polluted site through permeable reactive barrier |
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| CN104801540A (en) * | 2015-04-15 | 2015-07-29 | 刘骁勇 | Method for remedying contaminated site through combination of nanoscale zero-valent iron and reducing microorganisms |
| CN104944568A (en) * | 2015-05-22 | 2015-09-30 | 上海市环境科学研究院 | Slow-release compound repair material for treating chlorine-containing organic pollutants in groundwater and preparation method thereof |
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| CN207294214U (en) * | 2017-08-09 | 2018-05-01 | 中科鼎实环境工程股份有限公司 | Injection-type permeable reactive barrier sewage disposal module and its processing unit |
| CN108911005A (en) * | 2018-06-14 | 2018-11-30 | 中国科学院南京土壤研究所 | A kind of nano zero valence iron-charcoal composite material and preparation method and application |
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2019
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| KR20040057880A (en) * | 2002-12-24 | 2004-07-02 | 재단법인 포항산업과학연구원 | Permeable reactive barriers made of waste foundry sands |
| CN104801540A (en) * | 2015-04-15 | 2015-07-29 | 刘骁勇 | Method for remedying contaminated site through combination of nanoscale zero-valent iron and reducing microorganisms |
| CN104944568A (en) * | 2015-05-22 | 2015-09-30 | 上海市环境科学研究院 | Slow-release compound repair material for treating chlorine-containing organic pollutants in groundwater and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115636460A (en) * | 2022-09-28 | 2023-01-24 | 昆明理工大学 | Method for in-situ remediation of heavy metal-organic composite polluted groundwater by using electrochemically-enhanced permeable reactive barrier |
| CN116274312A (en) * | 2022-10-17 | 2023-06-23 | 中国科学院南京土壤研究所 | Method for in-situ restoration and control of polluted site through permeable reactive barrier |
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| CN110357241B (en) | 2020-11-06 |
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