CN106348418A - In-situ chemical-biological combined restoration method of chromium polluted underground water - Google Patents
In-situ chemical-biological combined restoration method of chromium polluted underground water Download PDFInfo
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- CN106348418A CN106348418A CN201610817640.0A CN201610817640A CN106348418A CN 106348418 A CN106348418 A CN 106348418A CN 201610817640 A CN201610817640 A CN 201610817640A CN 106348418 A CN106348418 A CN 106348418A
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- Prior art keywords
- pollution
- well
- injection
- underground water
- biological
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Classifications
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/04—Oxidation reduction potential [ORP]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses an in-situ chemical-biological combined restoration method of chromium polluted underground water. The method includes steps of arranging a pumping well and a recharge well in a pollution source zone, applying a method of pumping-recycling-recharging polluted underground water, controlling the underground water pollution in the pollution source zone and preventing further spreading; feeding chemical reduction drug and biological reduction drug in a pollution plume out of the pollution source successively by in-situ injection well injection or direct-pressing injection method, and processing hexavalent chromium in the pollution flume zone; arranging an in-situ reaction zone in the downstream of the pollution flume transfer direction, filling chemical/biological reduction drugs and forming a chemical/biological reaction zone effectively acted on hexavalent chromium of pollutant; thereby blocking and fixing hexavalent chromium in the underground water, and preventing pollution flume of underground water from spreading. The method can effectively restore the hexavalent chromium pollution in the underground water caused by electroplating, chromium salt production and other industries.
Description
Technical field
The present invention relates to a kind of pollution of chromium subsoil water in-situ chemical Co-bioremediation method, and realize the high efficiente callback of hydrargyrum
Method, belongs to contaminated soil remediation field.
Background technology
With carrying forward vigorously of the urbanization policy such as " move back two and enter three ", " Tui Chengjin garden ", original industrial undertaking moves in a large number,
Leave potentially large number of contaminated site.With the acceleration of urbanization process, a large amount of industrial occupancys being originally located at city suburbs have become
For densely populated city, there is very high risk in the place of leaving after resettlement, inappropriate reparation means have a strong impact on periphery
Environmental security and social stability.Wherein, China priority You70Yu Jia enterprise produced chromic salts so far, have 20 many places chromium salt factory to close down
Afterwards leave place, 40 many places left over by history chromium slag mucks put the main source that place is China's pollution of chromium place；In addition with upper
Thousand plating (chromium plating) enterprise places and hundreds of tanning enterprise places, the place of leaving that this part closes down enterprise is also China's chromium
The pith of contaminated site.
Cr VI cr (vi) toxicity that pollution of chromium place produces and animal migration are strong, are easily imported neighbouring earth's surface by rain drop erosion
Water or penetrate into subsoil water, causes serious pollution to subsoil water, threatens health and Environmental security.At present, mainly adopt
Process cr (vi) polluted underground water with electronation and bio-stabilization, but in Practical Project, cr in subsoil water after reparation
(vi) concentration easily has a rebound it is impossible to ensure the long-time stability of repairing effect.
Content of the invention
The purpose of the present invention is for the deficiencies in the prior art, provides a kind of pollution of chromium subsoil water in-situ chemical bio combined
Restorative procedure.
The purpose of the present invention is achieved through the following technical solutions: a kind of pollution of chromium subsoil water in-situ chemical is bio combined
Restorative procedure it is characterised in that arrange pumped well and recharge well in polluter region, after being processed using Pump-and-Treat-recharge
The method of lower water, controls polluter region underground water pollution；Pollution Plume region beyond polluter is injected with in-situ injection well
Or the mode priority of vertical compression injection adds electronation medicament and biological reducing medicament so that the Cr VI in Pollution Plume region is complete
It is reduced；Reaction in-situ band, injection chemical/biological reduction medicament are set in Pollution Plume migratory direction downstream, form useful effect
In pollutant chromic chemical/biological reaction zone, so that Cr VI is stopped and fixed in subsoil water, prevent underground
Water pollution plumage spreads.
Further, described pumped well and recharge well are set in polluter region, after processing using Pump-and-Treat-recharge
The method of subsoil water, controls polluter region underground water pollution, particularly as follows: according to the infiltration situation in polluter region, in pollution
The position that in source region center or subsoil water, pollution concentration is high arranges 1 mouthful of pumped well, in polluter marginal area with pumped well is
Centrally disposed many mouthfuls of recharge wells, extract through pumped well and extract the subsoil water in polluter region out, then dystopy adds electronation
With biological reducing medicament, process up to standard after by subsoil water through recharge well recharge.
Further, the injection point position of the injection of in-situ injection well or vertical compression injection, is by arranging groundwater monitoring-note
Penetrate well and carry out field test, determine the radius of influence to design.
Further, one row's injection well or the injection well of multiple rows of stagger arrangement distribution are set in Pollution Plume migratory direction downstream, to
Injection chemistry and biological agent in well, form a continuous reaction zone, and the pollutant in subsoil water are occurred with the medicament of injection
Physical/chemical/biological chemistry action and so that pollutant cr (vi) is stopped, fixing.
Further, described electronation medicament include but is not limited to sodium pyrosulfite, sodium sulfite, sodium sulfite,
The sulfur such as sodium thiosulfate system reducing agent, described biological reducing medicament includes but is not limited to glucose, acetic acid, lactic acid and ethanol etc. to be had
Machine carbon source.
Compared with prior art, the invention has the advantages that
(1) pass through polluter region using Pump-and-Treat-recharge control polluter region underground water pollution and prevent into
One step diffusion；Pollution Plume region beyond polluter adds electronation medicament and biological reducing medicament reparation pollution with original position
Feather tract domain；Reaction in-situ band is set in Pollution Plume migratory direction downstream, prevents pollution from downstream spreading, reach reparation underground completely
Water cr (vi) pollutes and prevents the purpose of contamination.
(2) reduction of chemical reducing agent and the direct-reduction (enzymatic reduction) of biological agent is utilized to process subsoil water cr
(vi) it is ensured that repairing effect.
(3) add organic carbon source maintain for a long time subsoil water lower oxidation reduction potential environment it is ensured that repairing effect long-term
Stability.
Brief description
Fig. 1 is the workflow diagram of pollution of chromium subsoil water in-situ chemical Co-bioremediation method.
Specific embodiment
In order to be more clearly understood to the technical characteristic of invention, purpose and effect, now compare the brief description present invention
Specific embodiment, in the various figures identical label represent that identical or structure is similar but function identical part.For making drawing
Succinctly, each in figure only schematically show part related to the present invention, and they do not represent it as the reality of product
Structure.In addition, for making simplified form readily appreciate, there is the part of identical structure or function in some in figures, only symbolically
Depict one of, or only marked one of.With reference to Figure of description and specific embodiment, to this
Bright it is described in detail.
A kind of pollution of chromium subsoil water in-situ chemical Co-bioremediation method, including polluter region setting pumped well and
Recharge well, the method for subsoil water after being processed using Pump-and-Treat-recharge, control polluter region underground water pollution；In polluter
In the way of the injection of in-situ injection well or vertical compression injection, priority adds electronation medicament and biology is gone back in Pollution Plume region in addition
Active compound agent, processes the Cr VI in Pollution Plume region；In Pollution Plume migratory direction downstream, reaction in-situ band, injection chemistry/raw are set
Thing reduces medicament, is formed and effectively acts on pollutant chromic chemical/biological reaction zone, so that Cr VI obtains in subsoil water
To stop and to fix, prevent underground water pollution plumage from spreading.
A kind of pollution of chromium subsoil water in-situ chemical Co-bioremediation method, the method is former in hexavalent chromium polluted subsoil water
Position handling process is realized, and comprises the following steps:
(1) subsoil water cr (vi) pollution amelioration parameter designing
Investigation determines subsoil water restoring area cr (vi) concentration and its distribution, locality descends its ph of water sample analysis, oxidation also
Former current potential orp and electrical conductivity, carry out field test by arranging 3～4 mouthfuls of groundwater monitoring-injector wells, determine the radius of influence, if
The suitable spacing of meter injection point position.In the present embodiment, groundwater remediation area is 6000m2, and cr (vi) concentration is 36.5mg/ to the maximum
l.
(2) polluter region adopts Pump-and-Treat-recharge method to control polluter
1 mouthful of pumped well and 4 mouthfuls of recharge wells are set in polluter region, polluted underground water is processed using Pump-and-Treat-recharge
Method, after polluted underground water is extracted out, dystopy adds electronation medicament sodium pyrosulfite and biological reducing medicament glucose,
Polluted underground water is after treatment when its cr (vi) concentration reaches the iii of " Groundwater Environmental Quality standard " (gb 14848-1994)
Class standard value 0.05mg/l is by its recharge.The Position Design of pumped well and recharge well is any technique commonly known means, typically
In the case of, the level of ground water according to polluter region and pollution concentration, pollution concentration in polluter regional center or subsoil water
Highest position arranges pumped well, arranges recharge well in polluter marginal area centered on pumped well.In the present embodiment, in dirt
Dye source region center arranges 1 mouthful of pumped well, is placed equidistant 4 mouthfuls of moisturizings in polluter marginal area centered on pumped well
Well, day pump-out be 50m3/ d, the dosage of the chemical reducing agent of unit bodies hydrops is 500g/m3, the biology of unit bodies hydrops is also
Former dose of dosage is 400g/m3, the Pump-and-Treat cycle is 63 days, and the individual well daily recharge water yield is 12.5m3/d.
(3) Pollution Plume region adds electronation medicament with original position and Pollution Plume repaired by biological reducing medicament
Pollution Plume region beyond polluter priority in the way of the injection of in-situ injection well or vertical compression injection adds chemistry
Reduction medicament and biological reducing medicament.In-situ injection well injection or vertical compression injection injection point position be designed as the normal of this area
With technological means, carry out field test generally by setting groundwater monitoring-injector well, determine the radius of influence to design.
In the present embodiment, the spacing of in-situ injection well is 3m, and its screen casing aperture is 4～9m, will reduce medicament injection by pressurized equipment
In subsoil water, the dosage of the chemical reducing agent of unit bodies hydrops is 500g/m3, the adding of the biological reductant of unit bodies hydrops
Measure as 400g/m3, injection pressure be 0.2～0.4mpa, injection rate be 500～1000l/h, individual well injection volume be 500～
1000l/ well, injection wheel number is 3 wheels.
(4) setting reaction in-situ band in Pollution Plume migratory direction downstream prevents contamination
In Pollution Plume migratory direction downstream, 35m reaction in-situ band is set.The decanting point that one trestle column is 3m is specifically set
Position, using geoprobe periodically to in-situ injection point position injection chemistry and biological reducing liquid medicine, each point position is injected every time
Amount 500～1000l, wherein, the concentration of electronation medicament is 2wt%, and the concentration of biological reducing medicament is 0.5wt%, is formed
One continuous reaction zone, the pollutant in subsoil water occur physical/chemical/biological chemistry action to make dirt with the medicament of injection
Dye thing cr (vi) is stopped, is fixed, and medicament injection depth is 4～9m.
(5) process detection and technique adjustment
After in-situ injection medicament finishes, subsoil water water sample in collection injector well and periphery monitoring well, measure subsoil water target
The important parameters such as pollutant cr (vi) concentration, orp, ph, electrical conductivity, temperature and dissolved oxygen.Will be according to above-mentioned finger in repair process
Target process detects, the timely feedback medicament radius of influence, treatment effect etc. adjust injection point position, medicament injection volume, injection with this
The site construction technologies such as speed.Continuous monitoring region up to standard can stop medicament injection, and pollution concentration detects upper zone, then need to increase
Adding medicine injection volume, until it reaches repair desired value.
In the present embodiment pass through polluter region adopt Pump-and-Treat-recharge, Pollution Plume region in-situ injection,
Three kinds of mode priorities such as Pollution Plume migratory direction downstream setting reaction in-situ band add electronation medicament 0.15%, biological reducing
Medicament 0.2%, after groundwater remediation, < 0.05mg/l, oxidation-reduction potential orp are 36～40mv to cr (vi) concentration.
Below schematically the invention and embodiments thereof are described, this description does not have restricted, accompanying drawing
Shown in be also one of embodiments of the present invention, actual structure is not limited thereto.So, if this area is general
Logical technical staff is enlightened by it, in the case of without departing from this creation objective, designs and this technical scheme without creative
Similar frame mode and embodiment, all should belong to the protection domain of this patent.
Claims (5)
1. a kind of pollution of chromium subsoil water in-situ chemical Co-bioremediation method is it is characterised in that setting is taken out in polluter region
Well and recharge well, the method that polluted underground water is processed using Pump-and-Treat-recharge, control polluter region underground water pollution；
Pollution Plume region beyond polluter priority in the way of the injection of in-situ injection well or vertical compression injection adds electronation medicament
With biological reducing medicament so that the Cr VI in Pollution Plume region is reduced completely；Arrange in situ in Pollution Plume migratory direction downstream
Reaction zone, injection chemical/biological reduction medicament, formed and effectively act on pollutant chromic chemical/biological reaction zone, thus
So that Cr VI in subsoil water is stopped and fix, prevent underground water pollution plumage from spreading.
2. restorative procedure according to claim 1 is it is characterised in that described arrange pumped well and moisturizing in polluter region
Well, the method that polluted underground water is processed using Pump-and-Treat-recharge, control polluter region underground water pollution, particularly as follows: root
Level of ground water and pollution concentration according to polluter region are distributed, the high position of pollution concentration in polluter regional center or subsoil water
Install pumped well, recharge well is set centered on pumped well in polluter marginal area, extract pollution source area through pumped well
The subsoil water in domain is extracted out, and then dystopy adds electronation and biological reducing medicament, by subsoil water through recharge well after process is up to standard
Recharge.
3. restorative procedure according to claim 1 it is characterised in that in-situ injection well injection or vertical compression injection injection point
Position, is to carry out field test by arranging groundwater monitoring-injector well, determines the radius of influence to design.
4. restorative procedure according to claim 1 is it is characterised in that inject in Pollution Plume migratory direction downstream setting one row
Well or the injection well of multiple rows of stagger arrangement distribution, inject chemistry and biological agent into well, form a continuous reaction zone, subsoil water
And in pollutant with injection medicament occur physical/chemical/biological chemistry action so that pollutant cr (vi) is stopped, consolidate
Fixed.
5. the restorative procedure according to any one of claim 1-4 it is characterised in that described electronation medicament include but not
It is limited to the sulfur such as sodium pyrosulfite, sodium sulfite, sodium sulfite, sodium thiosulfate system reducing agent, described biological reducing medicament bag
Include but be not limited to the organic carbon sources such as glucose, acetic acid, lactic acid and ethanol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817640.0A CN106348418A (en) | 2016-09-12 | 2016-09-12 | In-situ chemical-biological combined restoration method of chromium polluted underground water |
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| CN201610817640.0A CN106348418A (en) | 2016-09-12 | 2016-09-12 | In-situ chemical-biological combined restoration method of chromium polluted underground water |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107081433A (en) * | 2017-05-15 | 2017-08-22 | 轻工业环境保护研究所 | A kind of Nanoscale Iron medicament is prepared and injection synchronous integrated equipment in situ |
| CN107473362A (en) * | 2017-07-04 | 2017-12-15 | 中科鼎实环境工程股份有限公司 | A kind of intelligent underground water in-situ remediation system |
| CN110078151A (en) * | 2019-05-17 | 2019-08-02 | 中国地质大学（北京） | A kind of hexavalent chromium polluted method in in-situ immobilization low osmotic medium |
| CN113371773A (en) * | 2021-06-11 | 2021-09-10 | 轻工业环境保护研究所 | In-situ remediation method for groundwater and soil in polluted site |
| CN113979549A (en) * | 2019-07-26 | 2022-01-28 | 吉林大学 | Novel Cr (VI) polluted underground water in-situ repairing agent MOC and preparation method thereof |
| CN114472498A (en) * | 2022-01-28 | 2022-05-13 | 杰瑞环保科技有限公司 | In-situ remediation method and system suitable for petroleum hydrocarbon contaminated site |
| CN114632809A (en) * | 2022-03-18 | 2022-06-17 | 中国科学院南京土壤研究所 | Risk control method for polluted site and in-situ risk control domain of polluted site |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107081433A (en) * | 2017-05-15 | 2017-08-22 | 轻工业环境保护研究所 | A kind of Nanoscale Iron medicament is prepared and injection synchronous integrated equipment in situ |
| CN107473362A (en) * | 2017-07-04 | 2017-12-15 | 中科鼎实环境工程股份有限公司 | A kind of intelligent underground water in-situ remediation system |
| CN110078151A (en) * | 2019-05-17 | 2019-08-02 | 中国地质大学（北京） | A kind of hexavalent chromium polluted method in in-situ immobilization low osmotic medium |
| CN113979549A (en) * | 2019-07-26 | 2022-01-28 | 吉林大学 | Novel Cr (VI) polluted underground water in-situ repairing agent MOC and preparation method thereof |
| CN113371773A (en) * | 2021-06-11 | 2021-09-10 | 轻工业环境保护研究所 | In-situ remediation method for groundwater and soil in polluted site |
| CN114472498A (en) * | 2022-01-28 | 2022-05-13 | 杰瑞环保科技有限公司 | In-situ remediation method and system suitable for petroleum hydrocarbon contaminated site |
| CN114632809A (en) * | 2022-03-18 | 2022-06-17 | 中国科学院南京土壤研究所 | Risk control method for polluted site and in-situ risk control domain of polluted site |
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