CN106734150A - A kind of cycling elution system administered for farmland pollution soil remediation - Google Patents
A kind of cycling elution system administered for farmland pollution soil remediation Download PDFInfo
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- CN106734150A CN106734150A CN201710132455.2A CN201710132455A CN106734150A CN 106734150 A CN106734150 A CN 106734150A CN 201710132455 A CN201710132455 A CN 201710132455A CN 106734150 A CN106734150 A CN 106734150A
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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
- B09C2101/00—In situ
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- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of cycling elution system administered for farmland pollution soil remediation, it includes being sequentially connected irrigation leaching system, impurity and purification system and water purification storage and the recharge system for connecing, water purification storage and the water outlet of recharge system supply irrigation leaching system；The irrigation leaching system it is main by planting soil, organic matter filter layer, coarse sand filter layer, double-wall corrugated ooze pipe and collecting-tank is constituted, planting soil, organic matter filter layer, coarse sand filter layer, the double-wall corrugated pipe that oozes from top to bottom are arranged successively, the double-wall corrugated outlet connection collecting-tank for oozing pipe, the outlet connection impurity and purification system of collecting-tank.Present system reduces the content of pollutant in soil using the method for drip washing, while lowering of watertable, prevents pollution repeatedly；After the contaminant water oozed out after Soil leaching carries out impurity and purification, irrigation leaching is carried out to soil by recharge again, not only eliminated the pollutant in soil but also irrigated farmland, while the system for not producing secondary pollution.
Description
Technical field
Administer to repair the present invention relates to farmland pollution and be used for farmland pollution soil with environmental pollution prevention and control field, specifically one kind
The cycling elution system of earth repairing and treating.
Background technology
Soil is basis for the survival of mankind, raw in all things on earth soil, grain, melon fruits and vegetables that people eat, and vegetable oil
The almost all such as material, sugar material, Chinese medicine originate from soil；The animal products such as meat, egg, milk that people eat, and freshwater product is most
It is also by geophilous food conversion.Only possess the soil of cleaning, be possible to produce safe food, ability
The safety on the tip of the tongue is ensured from source.However, for a long time, with a large amount of exploitation of mineral resources, industrial production
Fast development and various chemical products, agricultural chemicals and chemical fertilizer widely use, the pollutant containing heavy metal enters by all means
Enter environment, cause soil, especially farmland soil heavy metals pollution is increasingly serious, is brought very to ecological environment and health
Big risk.
Heavy metal have the residence time it is long, it is disguised it is strong, the features such as toxicity is big, it is impossible to by chemistry or biodegradable, Yi Tong
Food chain approach is crossed in plant, animal and people's cylinder accumulation, serious prestige is constituted to ecological environment, food security and health
The side of body.The restorative procedure of current heavy-metal contaminated soil mainly includes peripheral doses, chemical remediation and the method such as biological prosthetic.With it
He compares restorative procedure, and Soil leaching is the restorative procedure that effective physical-chemical is combined.Soil leaching technology is usual
Refer to carry out drip washing contaminated soil by liquid or other fluids that soil pollutant can be promoted to dissolve migration, make absorption or be fixed on
The technology that pollutant desorption on soil particle dissolves and removes.Soil leaching quickly can not only move pollutant from soil
Remove, high density pollution soil remediation is completed in the short time, and control expense is relatively cheap, is particularly suited for heavy metal pollution
The improvement reparation of soil, has become one of contaminated soil fast repair technique Main Means now, existing a large amount of at home and abroad
Successful engineer applied.Elution method can flexibly take in situ or dystopy mode of operation, with bright application prospect.Drip washing is repaiied
Multiple key technology is selected or developed with the targetedly pouring without environmental toxicity and advantage of lower cost and non-secondary pollution
Lotion and ELUTION METHOD, formulate cost-effective renovation technique program.
But there is problems with the application in current Soil leaching technology：
The implementation of Soil leaching technology is generally divided into drip washing in situ and dystopy drip washing, and traditional Soil leaching technology is by water
Or chelating agent (citric acid, EDTA, DYPA, EDDS), acid/base solution (H containing rinse aid2SO4、HNO3), complexing agent (vinegar
Acid, ammonium acetate, cyclodextrin), the eluent such as surfactant (APG, SDS, SDBS, DDT, rhamnolipid) be injected into contaminated soil
Or in deposit, the process of wash-out and cleaning pollutant in soil.
General dystopy elution technique needs clear shoveling earth, is backfilled after being processed using large-scale drip washing equipment.Dystopy is drenched
Wash technology be faced with implementation process the earthwork dig clearly quantities and fund cost it is huge, it is high to drip washing equipment requirement the problems such as；
Dystopy drip washing agricultural land soil has not only broken up the original structure of agricultural land soil simultaneously, also results in nutrient loss, quality degradation, soil
Environment is unbalance, and this not only destroys root system of plant, and influence plant growth and farmland are cultivated, it is often more important that have impact on agriculture life
Produce, cause the economic loss of peasant.
Original position soil elution technique is the drawbacks of implementation process equally has above-mentioned dystopy elution technique, simultaneously because needing
The injection of substantial amounts of clean water and medicament, not only produces a large amount of pollutant effluents waste liquids, increases rehabilitation cost, the injection of drip washing medicament
The secondary pollution of soil can also be caused；Due to be drip washing in situ, it is necessary under conditions of not disturbed on a large scale to soil plus
Enter water and drip washing medicament, be difficult to be controlled reparation degree during implementation, wastewater eluting and medicament are downwards or to week
Side is spread, and causes new contaminant transportation, there is the risk for producing secondary pollution；Drip washing repairing polluted soil later stage rank in situ
Section, because precipitation or irrigation cause the raising and lowering of level of ground water to change, easily causes original pollutant for migrating downward into everywhere
The rising of lower water and rise, the soil of drip washing reparation is contaminated again again, original repairing effect is had a greatly reduced quality.
Traditional elution technique in situ is influenceed by underground water and the soil water, and leacheate drip washing migration rate is slower, shadow
Ring repairing efficiency；It is unavoidable in lessivation although not damaged to soil original structure compared with for dystopy drip washing
Nutrient loss can be caused, also needing to the long period after the completion of Soil leaching reparation carries out soil productivity and restoration of soil fertility, equally
Crop production reduction can be caused, agricultural economy is influenceed.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of cycling elution administered for farmland pollution soil remediation
System, the system is not being destroyed soil texture and soil fertility, is not being influenceed root system of plant and crops using drip washing principle in situ
In the case of growth, using the method for drip washing, the content of pollutant in soil is reduced, while lowering of watertable, prevents pollution
Repeatedly；After the contaminant water oozed out after Soil leaching carries out impurity and purification, irrigation leaching is carried out to soil by recharge again, both removed
The pollutant gone in soil has irrigated farmland again, while secondary pollution will not be produced.
The present invention solves above-mentioned technical problem with following technical scheme：
The cycling elution system that the present invention is administered for farmland pollution soil remediation, including it is sequentially connected the irrigation leaching for connecing
The storage of system, impurity and purification system and water purification and recharge system, water purification storage and the water outlet of recharge system supply irrigation leaching system
System, constitutes the circulatory system；The irrigation leaching system is main by planting soil, organic matter filter layer, coarse sand filter layer, double-walled ripple
Line oozes pipe and collecting-tank is constituted, and planting soil, organic matter filter layer, coarse sand filter layer, double-wall corrugated oozing are managed from top to bottom successively
Arrangement, the double-wall corrugated outlet connection collecting-tank for oozing pipe；The outlet connection impurity and purification system of collecting-tank.
The bottom of the collecting-tank is provided with HDPE antiseepage films.
The impurity and purification system includes the removal of impurities pond and the clarifier-tank that connect successively, entrance and the irrigation leaching system in removal of impurities pond
The collecting-tank of system is connected through pipeline, and the outlet in removal of impurities pond is connected through pipeline with the entrance of clarifier-tank, the outlet warp of clarifier-tank
Pipeline is stored with water purification and recharge system is connected, and the water pump that draws water is mounted on three pipelines.
It is provided with the removal of impurities pond and is connected successively, and first stage precipitation tank, second-level settling pond and flocculation that top is connected are heavy
Shallow lake pond, first stage precipitation tank is connected with the outlet of irrigation leaching system through pipeline, and flocculation sedimentation tank is connected with clarifier-tank through pipeline
Connect.
The semi-transparent ion exchange grid of macromolecule is provided with the clarifier-tank.
The water purification storage and recharge system include water purification storage pool, and water purification supply is irrigated and drenched by water purification storage pool through pipeline
System is washed, the water pump that draws water is installed on the pipeline.
The present invention compared with prior art, has the advantages that：
1st, the present invention is not breaking ring soil texture and soil for the cycling elution system that farmland pollution soil remediation is administered
Fertility, do not influence root system of plant and crop growth in the case of, by using ELUTION METHOD, reduce containing for pollutant in soil
Amount, reaches the purpose of soil remediation.
2nd, the present invention is used for the cycling elution system of farmland pollution soil remediation improvement during repairing and treating soil
Can controlling groundwater level to greatest extent, prevent pollution repeatedly, soil remediation effect is strengthened, while can also effectively control
Reparation degree, prevents leachate from migrating downward into, it is to avoid to cause secondary pollution.
3rd, the present invention is removing the same of pollutant in soil for the cycling elution system that farmland pollution soil remediation is administered
When by leacheate reclaim focus on, the leachate after treatment be used for field irrigation, both repaired contaminated soil, agriculture has been irrigated again
Field, while having saved water resource, does not result in the secondary pollution of environment.
4th, the present invention uses water or liquid is added in water for the cycling elution system that farmland pollution soil remediation is administered
Body fertilizer has both repaired soil as leacheate, soil fertility is improve again, while not bringing other chemical substances into, it is to avoid
The generation of secondary pollution.
5th, the present invention need not be used for the cycling elution system that farmland pollution soil remediation is administered in implementation process
Extensive construction equipment, soil excavation area and quantities are small, and construction is simple, and the scope of operation is small, both do not need substantial contribution or not
Influence agricultural production.
Brief description of the drawings
Fig. 1 is the block schematic illustration of present system.
In figure：1- planting soils, 2- organic matters filter layer, 3- coarse sands filter layer, 4- be double-wall corrugated ooze pipe, 5- collecting-tanks,
6-HDPE antiseepage films, 7- draw water water pump one, 8- first stage precipitation tanks, 9- second-level settling ponds, 10- flocculation sedimentation tanks, 11- removal of impurities pond,
12- draw water the semi-transparent ion exchange grid of water pump two, 13- clarifier-tanks, 14- macromolecules, 15- draw water water pump three, 16- water purification storage
Draw water water pump four for pond, 17-.
Specific embodiment
Technical solution of the present invention is described in more detail below in conjunction with accompanying drawing.
As shown in figure 1, the cycling elution system that the present invention is administered for farmland pollution soil remediation, including be sequentially connected and connect
Irrigation leaching system, impurity and purification system and water purification storage and recharge system, the irrigation leaching system is main by planting soil
Earth 1, organic matter filter layer 2, coarse sand filter layer 3, it is double-wall corrugated ooze pipe 4 and collecting-tank 5 is constituted, the filtering of planting soil 1, organic matter
Layer 2, coarse sand filter layer 3, the double-wall corrugated pipe 4 that oozes from top to bottom are arranged successively, and the double-wall corrugated outlet for oozing pipe 4 connects collection after converging
Pond 5, the bottom of collecting-tank 5 is provided with HDPE antiseepage films 6, the outlet connection impurity and purification system of collecting-tank 5；The impurity and purification
System includes being provided with the removal of impurities pond 11 that connects successively and clarifier-tank 13, removal of impurities pond 11 and connects successively, and top be connected one
The collecting-tank 5 of level sedimentation basin 8, second-level settling pond 9 and flocculation sedimentation tank 10, first stage precipitation tank 8 and irrigation leaching system is through pipeline
It is connected, the water pump 1 that draws water is installed on the pipeline, the outlet of flocculation sedimentation tank 10 is connected with clarifier-tank 13 through pipeline, should
The water pump 2 12 that draws water is installed on pipeline, it is provided with the semi-transparent ion exchange grid 14 of macromolecule in clarifier-tank 13, clarifier-tank 13 goes out
Mouth is stored through pipeline and water purification and recharge system is connected, and the water pump 3 15 that draws water is provided with the pipeline；Water purification storage and
Recharge system includes water purification storage pool 16, and water purification is supplied irrigation leaching system by water purification storage pool 16 through pipeline, is pacified on the pipeline
Equipped with the water pump 4 17 that draws water, after the water pump 4 17 that draws water extracts water out from water purification storage pool 16, recharge to planting soil 1,
Form closed loop system.
Operating process and operating result the following is the application example of present system：
(1) irrigation water is injected into planting soil 1, irrigation water enters by organic matter filter layer 2 and coarse sand filter layer 3
Pipe 4 is oozed to double-wall corrugated, and collect inflow collecting-tank 5；
(2) water pump 1 that draws water is opened, the irrigation water after drip washing is extracted into removal of impurities pond 11, by first stage precipitation tank 8, two
After level sedimentation basin 9 and the removal of impurities of flocculation sedimentation tank 10, the water pump 2 12 that draws water is opened, the water after removal of impurities is evacuated to clarifier-tank 13；
(3) after the semi-transparent ion exchange grid 14 of macromolecule is purified, the water pump 3 15 that draws water is opened, after impurity and purification
It is standby that irrigation water is evacuated to water purification storage pool 16；
(4) system operation for a period of time after, opening is drawn water water pump 4 17, and the irrigation water after impurity and purification is extracted out, is used for
Irrigate again；
(5) repeat step (1), (2), (3), (4).
Result shows：Before processing heavy metal in soil total amount be 166.74mg/kg (heavy metal cadmium content 72.78mg/kg,
Heavy metal chromium content 93.96mg/kg), after being processed through cycling elution system of the present invention, heavy metal in soil total amount is reduced to
13.36mg/kg (heavy metal cadmium content is 6.74mg/kg, and heavy metal chromium content is reduced to 6.62mg/kg), heavy metal in soil goes
Except rate reaches 92%, (clearance of heavy metal cadmium is 90.7%, and the clearance of heavy metal chromium is for 93%).
The present invention reduces the content of pollutant in soil, while lowering of watertable, prevents by the method using drip washing
Pollution is repeatedly；After the contaminant water oozed out after Soil leaching carries out impurity and purification, irrigation leaching is carried out to soil by recharge again,
Not only the pollutant in soil had been eliminated but also had irrigated farmland, while the system for not producing secondary pollution.
Present system according to original position soil drip washing principle, the method for taking local trench digging, stringing, using irrigation water or
In irrigation water add Liquid Fertilizer as eluent, while heavy metal is eluted from soil neither large area excavation construction,
Destruction soil texture, nor affects on plant growth, while also being fostered and apply fertilizer to soil, improves soil fertility, strengthens soil
Soil fertility, and irrigation is implemented to farmland；Both the pollutant in soil had been eliminated, agricultural production had been promoted again.Drip washing after drip washing
Agent is by the way that after centralized collection, unification is cleaned, removal of impurities treatment.Eluent after treatment can also be carried out as irrigation water again
Field irrigation, had not only saved water resource but also had not caused secondary pollution, because present system is laid with percolating pipe, can be with maximum
The controlling groundwater level of degree, prevents pollution repeatedly, it is ensured that repairing effect.
Present system is particularly well-suited to the improvement of the heavy metal pollution such as nonirrigated farmland, orchard agricultural land soil and repairs.
Claims (6)
1. it is a kind of for farmland pollution soil remediation administer cycling elution system, it is characterised in that：The system includes phase successively
The storage of the irrigation leaching system of connection, impurity and purification system and water purification and recharge system, water purification storage and the water outlet of recharge system
Supply irrigation leaching system, constitutes the circulatory system；The irrigation leaching system it is main by planting soil, it is organic matter filter layer, thick
Sand filter layer, it is double-wall corrugated ooze pipe and collecting-tank is constituted, planting soil, organic matter filter layer, coarse sand filter layer, double-wall corrugated ooze
Pipe is from top to bottom arranged successively, the double-wall corrugated outlet connection collecting-tank for oozing pipe；The outlet connection impurity and purification system of collecting-tank.
2. the cycling elution system that farmland pollution soil remediation is administered is used for according to claim 1, it is characterised in that：It is described
The bottom of collecting-tank is provided with HDPE antiseepage films.
3. it is according to claim 1 or claim 2 for farmland pollution soil remediation administer cycling elution system, it is characterised in that：
The impurity and purification system includes the removal of impurities pond and clarifier-tank, the entrance in removal of impurities pond and the catchmenting for irrigation leaching system that connect successively
Pond is connected through pipeline, and the outlet in removal of impurities pond is connected through pipeline with the entrance of clarifier-tank, the outlet of clarifier-tank through pipeline with it is net
Water is stored and recharge system is connected, and the water pump that draws water is mounted on three pipelines.
4. the cycling elution system that farmland pollution soil remediation is administered is used for according to claim 3, it is characterised in that：It is described
It is provided with removal of impurities pond and is connected successively, and first stage precipitation tank, second-level settling pond and the flocculation sedimentation tank that top is connected, one-level precipitation
Pond is connected with the outlet of irrigation leaching system through pipeline, and flocculation sedimentation tank is connected with clarifier-tank through pipeline.
5. the cycling elution system that farmland pollution soil remediation is administered is used for according to claim 3, it is characterised in that：It is described
The semi-transparent ion exchange grid of macromolecule is provided with clarifier-tank.
6. it is according to claim 1 or claim 2 for farmland pollution soil remediation administer cycling elution system, it is characterised in that：
The water purification storage and recharge system include water purification storage pool, and water purification is supplied irrigation leaching system by water purification storage pool through pipeline,
The water pump that draws water is installed on the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710132455.2A CN106734150A (en) | 2017-03-07 | 2017-03-07 | A kind of cycling elution system administered for farmland pollution soil remediation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710132455.2A CN106734150A (en) | 2017-03-07 | 2017-03-07 | A kind of cycling elution system administered for farmland pollution soil remediation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855353A (en) * | 2017-07-21 | 2018-03-30 | 郑旭东 | A kind of plane leaching repairing method in situ of heavy-metal contaminated soil |
| CN107900089A (en) * | 2017-11-21 | 2018-04-13 | 上海交通大学 | The restorative procedure and its device of heavy-metal contaminated soil based on blade excretion mechanism |
| CN108746174A (en) * | 2018-06-08 | 2018-11-06 | 广西博世科环保科技股份有限公司 | A kind of ecological elution circuit administered for heavy-metal contaminated soil or slag |
| CN109319974A (en) * | 2018-10-10 | 2019-02-12 | 四川农业大学 | A kind of easy device and method suitable for farmland low-concentration heavy metal mud-water separation |
| CN111149459A (en) * | 2020-03-11 | 2020-05-15 | 顾飞 | Soil remediation device |
| CN112157120A (en) * | 2020-08-25 | 2021-01-01 | 中国科学院烟台海岸带研究所 | Method and device for repairing soil by solubilizing and increasing drainage mode |
| CN113770166A (en) * | 2021-09-28 | 2021-12-10 | 中国科学院遗传与发育生物学研究所农业资源研究中心 | Chemical leaching remediation method for heavy metal contaminated soil |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855353A (en) * | 2017-07-21 | 2018-03-30 | 郑旭东 | A kind of plane leaching repairing method in situ of heavy-metal contaminated soil |
| CN107900089A (en) * | 2017-11-21 | 2018-04-13 | 上海交通大学 | The restorative procedure and its device of heavy-metal contaminated soil based on blade excretion mechanism |
| CN107900089B (en) * | 2017-11-21 | 2020-03-17 | 上海交通大学 | Heavy metal contaminated soil remediation method and device based on leaf excretion mechanism |
| CN108746174A (en) * | 2018-06-08 | 2018-11-06 | 广西博世科环保科技股份有限公司 | A kind of ecological elution circuit administered for heavy-metal contaminated soil or slag |
| CN109319974A (en) * | 2018-10-10 | 2019-02-12 | 四川农业大学 | A kind of easy device and method suitable for farmland low-concentration heavy metal mud-water separation |
| CN111149459A (en) * | 2020-03-11 | 2020-05-15 | 顾飞 | Soil remediation device |
| CN112157120A (en) * | 2020-08-25 | 2021-01-01 | 中国科学院烟台海岸带研究所 | Method and device for repairing soil by solubilizing and increasing drainage mode |
| CN113770166A (en) * | 2021-09-28 | 2021-12-10 | 中国科学院遗传与发育生物学研究所农业资源研究中心 | Chemical leaching remediation method for heavy metal contaminated soil |
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