CN108746174A - A kind of ecological elution circuit administered for heavy-metal contaminated soil or slag - Google Patents
A kind of ecological elution circuit administered for heavy-metal contaminated soil or slag Download PDFInfo
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- CN108746174A CN108746174A CN201810590079.6A CN201810590079A CN108746174A CN 108746174 A CN108746174 A CN 108746174A CN 201810590079 A CN201810590079 A CN 201810590079A CN 108746174 A CN108746174 A CN 108746174A
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- slag
- contaminated soil
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- 239000002689 soil Substances 0.000 title claims abstract description 97
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 44
- 238000010828 elution Methods 0.000 title claims abstract description 34
- 239000002893 slag Substances 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000002386 leaching Methods 0.000 claims abstract description 22
- 238000004062 sedimentation Methods 0.000 claims abstract description 21
- 238000003973 irrigation Methods 0.000 claims abstract description 19
- 230000002262 irrigation Effects 0.000 claims abstract description 19
- 238000000746 purification Methods 0.000 claims abstract description 17
- 239000000284 extract Substances 0.000 claims abstract description 16
- 229920001903 high density polyethylene Polymers 0.000 claims description 11
- 239000004700 high-density polyethylene Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000002734 clay mineral Substances 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 18
- 238000000034 method Methods 0.000 description 13
- 238000005067 remediation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 235000014676 Phragmites communis Nutrition 0.000 description 4
- 239000003480 eluent Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000003621 irrigation water Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
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- 238000010521 absorption reaction Methods 0.000 description 2
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- 239000003513 alkali Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
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- 238000011084 recovery Methods 0.000 description 2
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- 241000368110 Noccaea rotundifolia Species 0.000 description 1
- 240000005319 Sedum acre Species 0.000 description 1
- 235000014327 Sedum acre Nutrition 0.000 description 1
- 241000124844 Sedum alfredii Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241000778368 Viola baoshanensis Species 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 231100000749 chronicity Toxicity 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
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- 239000003673 groundwater Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000419 plant extract Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
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- 238000003892 spreading Methods 0.000 description 1
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- 239000004094 surface-active agent Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
-
- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Soil Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of ecological elution circuit administered for heavy-metal contaminated soil or slag, which is made of irrigation leaching system and biological water purification system, connects to form closed loop through pipeline between irrigation leaching system and biological water purification system；The irrigation leaching system mainly extracts well by pollution-free mellow soil layer, contaminated soil or slag layer and leacheate and constitutes, and pollution-free mellow soil layer is located at the upper surface of contaminated soil or slag layer, and the leacheate extraction well for stretching out outside is provided in contaminated soil or slag layer；The biological water purification system is made of the sedimentation basin, ecological water channel and biological pond being sequentially connected through pipeline, and the water outlet that leacheate extracts well connects with sedimentation basin, the pollution-free mellow soil layer of the outlet end connection irrigation leaching system of biological pond.Low energy consumption for ecology elution circuit processing of the invention, and operation and maintenance are convenient, of low cost, non-secondary pollution.
Description
Technical field
The invention belongs to environment remediation field, specifically a kind of ecology leaching administered for heavy-metal contaminated soil or slag
Wash system.
Background technology
With the continuous quickening of industrialization and urbanization process, China once greatly developed mining, process hides, smelting, plating, burning
The industries such as alkali manufacture, waste incineration, sewage irrigation, but the blowdown supervisory system and not perfect, green technology in China during this period
It is relatively backward, efficient circulation utilization ratio it is low etc. situations, so as to cause plurality of heavy metal with waste water,waste gas and industrial residue into burying
Earth causes the serious heavy metal pollution of soil in China.Heavy metal pollution of soil have concealment, refractory organics, chronicity, can not
The characteristics of inverse property, not only results in soil degradation, pollution hydrological environment, and can constantly be accumulated in the ecosystem, reduces agriculture
Crop yield and quality threaten health by food chain, or even generate serious Ecological Environment Risk.Therefore, how to have
The removing heavy metal-polluted soil of effect by be heavy-metal contaminated soil reparation difficult point.
The restorative procedure of heavy-metal contaminated soil is broadly divided into physical-chemical process and biological restoration, there are commonly solidification/
The technologies such as stabilisation, elution, electro reclamation, thermodynamics reparation, phytoremediation, microorganism remediation.Compared with other recovery techniques,
Soil leaching be it is a kind of can be by physical-chemical restorative procedure that heavy metal is removed from soil.Soil leaching refers in fluid
Under effect, the pollutant in solid phase of soil is transferred in liquid phase of soil by the desorption dissolution of eluent, then containing dirt
Contaminate the technology of the waste water recycling device of object.Soil leaching recovery technique is that an application is strong, can thoroughly remove pollutant, processing
Fireballing soil restoring technology, and control expense relative moderate have been widely used in soil remediation improvement, especially suitable
In the improvement of heavy-metal contaminated soil.The key of elution technique is to select remediation efficiency high, at low cost and non-secondary pollution
Eluent and ELUTION METHOD, at present elution technique have the following problems in the application：
Elution method can neatly use the repair mode of original position or dystopy in practical applications.Dystopy elution is clear first to cut the earth
Earth backfills after contaminated soil scrubbed equipment processing, and this method has that strong to the perturbation of soil, quantities is big, pair sets
It is standby to require the problems such as high, of high cost.Original position for traditional mode and dystopy elution technique, generally use in lessivation
The eluents such as water, acid, alkali, salt, chelating agent, surfactant and compound eluent, can cause soil texture to destroy, and be unfavorable for planting
Object is grown, or even causes soil degradation and the secondary pollution of soil；Lessivation generates a large amount of waste liquid simultaneously, increases post-processing
Cost.
Invention content
Technical problem to be solved by the invention is to provide a kind of ecologies administered for heavy-metal contaminated soil or slag
Elution circuit, the system can make full use of natural precipitation and irrigate water wash contaminated soil, reduce heavy metal in soil content,
Achieve the purpose that soil remediation, and does not destroy the soil texture and soil fertility of the pollution-free mellow soil layer on upper layer again.
The present invention solves above-mentioned technical problem with following technical solution：
The ecological elution circuit that the present invention is administered for heavy-metal contaminated soil or slag, it is by irrigation leaching system and life
Object water cleaning systems are constituted, and connect to form closed loop through pipeline between irrigation leaching system and biological water purification system；It is described
Irrigation leaching system mainly extracts well by pollution-free mellow soil layer, contaminated soil or slag layer and leacheate and constitutes, pollution-free mellow soil
Layer is located at the upper surface of contaminated soil or slag layer, and the leacheate extraction well for stretching out outside is provided in contaminated soil or slag layer；
The biological water purification system is made of the sedimentation basin, ecological water channel and biological pond being sequentially connected, sedimentation basin, ecological water channel and biology
It is connected by pipeline between the pool, the water outlet that leacheate extracts well connects with sedimentation basin, and leaching is irrigated in the water outlet connection of biological pond
Wash the pollution-free mellow soil layer of system.
The side wall of pollution-free mellow soil layer of the present invention, the side wall of soil or slag layer and bottom are equipped with HDPE antiseepages
Film, the surrounding of the ecology water channel and bottom are equipped with HDPE antiseepage films.
Leacheate of the present invention extracts between the water outlet and sedimentation basin of well, between sedimentation basin and ecological water channel, biology
It is separately installed with water pump in connecting pipe between the pool and pollution-free mellow soil layer.
Leacheate extracts in well and sets water level monitor in irrigation leaching system of the present invention.
Being covered with counterweight metal in the HDPE antiseepage films of ecology water channel bottom of the present invention has the clay mineral of adsorption effect
Matrix.
Kind, which is implanted with counterweight metal, in ecology water channel and biological pond of the present invention the water plant of suction-operated, ecological water
The side slope kind of canal and biological pond is implanted with heavy metal super-enriched plant.
Compared with prior art, the present invention having the advantages that：
1. the principle that ecology elution circuit of the invention is combined using elution in situ and restoration of the ecosystem, can make full use of nature
Precipitation and irrigation water wash contaminated soil, reduce heavy metal in soil content, achieve the purpose that soil remediation, and do not destroy
The soil texture and soil fertility of the pollution-free mellow soil layer of layer.
2. ecology elution circuit of the invention monitors water level in real time during repairing and treating, avoid water level higher than pollution soil layer
Or slag layer, prevent leacheate from polluting mellow soil layer；It is anti-in the surrounding and bottom laying HDPE of pollution soil layer and ecological water channel simultaneously
Film is oozed, leacheate soil mobility around is prevented, does not generate secondary pollution.
3. ecology elution circuit of the invention is equipped with bed mud-clay by the ecological water channel bottom in biological water purification system
Mineral substrate achievees the effect that purifying water body heavy metal by physics chemical action or surface precipitation；Ecological water channel and life
The water plants such as heavy metal super-enriched plant, reed are planted in the object pool, are reduced the effects that plant extract, microorganism are fixed in water
Content of beary metal, while revegetation promotes the harmony with periphery ecoscape, in ecology improvement, beautification of landscape etc. hair
Wave important function.
4. ecology elution circuit of the invention, using original hollow landform, is not take up additional in implementing operating process
Disposal field reduces the perturbation to soil, simplifies construction, and scale of investment is small, economizes the land resource, and restores topography and geomorphology；Ground
Shape land restoration and recirculated water make original region for being unfavorable for cultivation restore agricultural productivity on the basis of irrigating；In ecological ditch
Canal coordinates biological pond, and is rationally utilized to biological pond, and fishery cultivating or aquatic agricultural are carried out, with good economic efficiency
And environmental benefit.
5. the leacheate of ecology elution circuit of the invention by ecological water channel, biological pond purification after recharge to irrigation leaching
System realizes recycling.
Description of the drawings
Fig. 1 is the structural schematic diagram for the ecological elution circuit that the present invention is administered for heavy-metal contaminated soil or slag.
In figure：1- is pollution-free mellow soil layer, 2- contaminated soils layer, 3- leacheates extract well, 4-HDPE antiseepage films, 5- water pumps
One, 6- sedimentation basins, 7- water pumps two, 8- ecologies water channel, 9- biological ponds, 10- clay minerals matrix, 11- water plants, a 12- huge sum of moneys
Belong to super enriching plant, 13- water pumps three.
Specific implementation mode
Technical solution of the present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the present invention for the ecological elution circuit that heavy-metal contaminated soil or slag are administered is drenched by irrigating
System and biological water purification system composition are washed, connects to form closed circulation through pipeline between irrigation leaching system and biological water purification system
Circuit.The irrigation leaching system is mainly extracted by pollution-free mellow soil layer 1, contaminated soil layer 2 (or being slag layer) and leacheate
Well 3 is constituted, and pollution-free mellow soil layer 1 is located at the upper surface of contaminated soil layer 2, and the elution for stretching out outside is provided in contaminated soil layer 2
Liquid extracts well 3.The biological water purification system is made of sedimentation basin 6, ecological water channel 8 and biological pond 9, sedimentation basin 6, ecological water channel 8
It is connected by pipeline with biological pond 9, the water outlet that leacheate extracts well 3 is connected with sedimentation basin 6, the outlet end of biological pond 9
Pollution-free mellow soil layer 1 is connected, to realize that purification Water Spreading utilizes.
The side wall of pollution-free mellow soil layer 1 of the present invention, the side wall of contaminated soil layer 2 and bottom are equipped with HDPE antiseepage films
4, the surrounding of ecological water channel 8 and bottom are equipped with HDPE antiseepage films 4.
Leacheate of the present invention extracts and is equipped with water pump one in the connecting pipe between the water outlet and sedimentation basin 6 of well 3
5, water pump 27 is installed in the connecting pipe between sedimentation basin 6 and ecological water channel 8, the water outlet of biological pond 9 is connected through pipeline to be filled
The pollution-free mellow soil layer 1 for irrigating elution circuit is equipped with water pump 3 13 on the pipeline, handled in biological pond 9 it is up to standard after water it is logical
Water pump 3 13 is crossed through pipeline recharge to pollution-free mellow soil layer 1, forms closed loop system.
Leacheate of the present invention extracts in well 3 and sets water level monitor, for monitoring level of ground water in real time, to avoid water level
It is excessively high to influence pollution-free mellow soil layer 1.
Being covered with counterweight metal in the HDPE antiseepage films of 8 bottom of ecology water channel of the present invention has the clay mineral of adsorption effect
Matrix 10, the clay mineral matrix 10 are one or more in zeolite, concave convex rod, montmorillonite, illite etc..
Kind, which is implanted with counterweight metal, in ecology water channel 8 and biological pond 9 of the present invention the water plant 11 of suction-operated, such as
The water plants such as reed.In the side slope of ecological water channel 8 and biological pond 9 kind be implanted with heavy metal super-enriched plant 12, as Viola baoshanensis,
The heavy metal super-enriched plants such as roundleaf penny cress, Phytolacca acinosa, ciliate desert-grass, Sedum alfredii Hance, glossy privet.
The course of work of the present invention for the ecological elution circuit that heavy-metal contaminated soil or slag are administered is as follows：
(1) after natural precipitation or irrigation water enter pollution-free mellow soil layer 1, undergoing hydrodynamic action will be in contaminated soil layer 2
Pollutant is eluted out；When monitoring water level close to before pollution-free mellow soil layer 1, by controlling water pump 1, by leacheate from extraction
Extraction enters sedimentation basin 6 in well 3；
(2) leacheate enters ecological water channel 8, ecological water by sedimentation basin 6, the water pump 27 in biological water purification system successively
Purification of water quality reaches in canal 8《Water environment quality standard》(GB 3838-2002) enters biological pond 9 afterwards；
(3) water outlet of biological pond 9 reaches《Agricultural irrigation water quality standard》(GB 5084-2005) passes through the water in recharge system
Pump 3 13 and pipeline recharge to irrigation leaching system pollution-free mellow soil layer 1；
(4) system operation for a period of time after, by through purification it is up to standard after irrigation water extract out, by recharge system for again
Secondary irrigation；
(5) step (1), (2), (3), (4) are repeated.
The present invention makes leacheate reduce particle content in leacheate through precipitation by the way that sedimentation basin 6 is arranged；Pass through life
The absorption of the clay mineral matrix counterweight physical chemistry of metal of state water channel 10, and pass through water plant 11 and heavy metal super-enriched
Plant 12 reaches the effect to purify water to heavy metal in the plant absorption effect of heavy metal and rhizosphere microbial effect trap water
Fruit.
Biological pond 9 of the present invention can carry out aquaculture or aquatic agricultural；It is raw in the ecology water channel 8, biological pond 9
Long reed and heavy metal super-enriched plant need to gather in storage in time；The plant tissue of collection and ecological water channel midsole mud are according to ring
Guarantor portion requires to do harmless treatment.
Using the application example of ecological elution circuit of the invention：
Heavy metal in soil cadmium content 45.67mg/kg, heavy metal zinc content 587.21mg/kg, heavy metal lead contain before processing
Measure 2541.35mg/kg, heavy metal chromium content 78.36mg/kg.After cycling elution system of the present invention processing, heavy metal in soil
Cadmium content 3.93mg/kg, heavy metal zinc content 54.61mg/kg, content of heavy metal lead 190.60mg/kg, heavy metal chromium content
5.41mg/kg, heavy metal cadmium, zinc, lead, chromium removal rate be respectively 91.4%, 90.7%, 92.5%, 93.1%.
As it can be seen that after carrying out cycling elution using the ecological elution circuit of the present invention, containing for pollutant in soil is significantly reduced
Amount；Pollution-free mellow soil layer can plant the plants such as vegetation simultaneously, and reed and Phytolacca acinosa, red-spotted stonecrop etc. are planted in ecological water channel and biological pond
Heavy metal super-enriched plant can cultivate aquatic animal in ecological water channel and biological pond, increase vegetation coverage and biology be more
Sample is beneficial to beautify local landscape and improve the ecological environment.
Claims (6)
1. a kind of ecological elution circuit administered for heavy-metal contaminated soil or slag, it is characterised in that：It is by irrigation leaching
System and biological water purification system are constituted, and connect to form closed circulation time through pipeline between irrigation leaching system and biological water purification system
Road；The irrigation leaching system mainly extracts well by pollution-free mellow soil layer, contaminated soil or slag layer and leacheate and constitutes, no dirt
Dye mellow soil layer is located at the upper surface of contaminated soil or slag layer, and the leacheate pumping for stretching out outside is provided in contaminated soil or slag layer
Take well；The biological water purification system is made of the sedimentation basin, ecological water channel and biological pond being sequentially connected, sedimentation basin, ecological water channel
It is connected by pipeline between biological pond, the water outlet that leacheate extracts well connects with sedimentation basin, the water outlet connection of biological pond
The pollution-free mellow soil layer of irrigation leaching system.
2. being used for the ecological elution circuit that heavy-metal contaminated soil or slag are administered according to claim 1, it is characterised in that：
The side wall of the pollution-free mellow soil layer, the side wall of soil or slag layer and bottom are equipped with HDPE antiseepage films, the ecology water channel
Surrounding and bottom be equipped with HDPE antiseepage films.
3. the ecological elution circuit according to claim 1 or claim 2 administered for heavy-metal contaminated soil or slag, feature exist
In：The leacheate extracts between the water outlet and sedimentation basin of well, between sedimentation basin and ecological water channel, biological pond with it is pollution-free ripe
It is separately installed with water pump in connecting pipe between soil layer.
4. the ecological elution circuit according to claim 1 or claim 2 administered for heavy-metal contaminated soil or slag, feature exist
In：Leacheate extracts in well and sets water level monitor in the irrigation leaching system.
5. being used for the ecological elution circuit that heavy-metal contaminated soil or slag are administered according to claim 2, it is characterised in that：
Being covered with counterweight metal in the HDPE antiseepage films of the ecology water channel bottom has the clay mineral matrix of adsorption effect.
6. the ecological elution circuit according to claim 1 or claim 2 administered for heavy-metal contaminated soil or slag, feature exist
In：Kind, which is implanted with counterweight metal, in the ecology water channel and biological pond the water plant of suction-operated, ecological water channel and biological pond
Side slope kind be implanted with heavy metal super-enriched plant.
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