CN109078973A - A kind of hyposmosis contaminated area underground water aeration restorative procedure - Google Patents
A kind of hyposmosis contaminated area underground water aeration restorative procedure Download PDFInfo
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- CN109078973A CN109078973A CN201810678191.5A CN201810678191A CN109078973A CN 109078973 A CN109078973 A CN 109078973A CN 201810678191 A CN201810678191 A CN 201810678191A CN 109078973 A CN109078973 A CN 109078973A
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- hyposmosis
- contaminated area
- aeration
- underground water
- surfactant
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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
- C02F7/00—Aeration of stretches of water
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/04—Surfactants, used as part of a formulation or alone
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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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)
Abstract
The invention discloses a kind of hyposmosis contaminated area underground water aeration restorative procedures, on the basis of surfactant enhanced aeration technology, using sodium carboxymethyl cellulose solution as the air motion direction of thickening barrier oriented control aeration process, to solve the problems, such as that local hyposmosis contaminated area is difficult to repair.The present invention utilizes the synergistic effect for thickening barrier and surfactant, while soil layer gas permeability hinders air-flow to pass through around using thickening barrier reduction hyposmosis area, hyposmosis soil layer gas permeability is improved using surfactant, directional induction aeration gas flow passes through hyposmosis contaminated area under the synergistic effect for thickening both barrier and surfactant, to play the role of good aeration reinforcing.
Description
Technical field
The invention belongs to soil and groudwater remediation technical fields, and in particular to a kind of hyposmosis contaminated area underground water aeration
Restorative procedure.
Background technique
With industrialization development, the pollution of soil and underground water is increasingly serious, organic dirt especially in industrial processes
The discharge for contaminating object, makes many poisonous and harmful substances enter soil and groundwater, constitutes to the health of the people, ecological environment serious
It threatens.Aeration recovery technique (In Situ Air Sparging, IAS) is considered as removal saturated soil and ground to underground water in situ
It is lauched one of the effective ways of middle volatilization/half volatile organic contaminant.By by injections such as fresh air or ozone impurely
It is lauched, gas carries vapor phase contaminants and gradually rises under buoyancy, is collected in aeration zone using gas phase extraction well, to reach
The purpose of pollutant into removal underground water.Surfactant enhanced aeration technology (Surfactant Enhanced Air
Sparging, SEAS) it is that the important development of underground water aeration technology can be with by introducing surfactant in aeration process
The surface tension of underground water is reduced, increases air-flow to the penetration capacity of low permeability formation medium, while enhancing pollutant from particulate
Desorption ability in soil considerably increases pollutant with the contact area of underground water and air-flow, to improve underground water aeration
Removal effect of the recovery technique to organic pollutant.
Although surfactant enhanced aeration recovery technique substantially increases aeration efficiency, but it is simpler to be often suitable for stratum
It is single, the soil texture is uniform, good penetrability stratum, and most of contaminated site geological conditions are more complicated in engineering, often deposit
In the hyposmosis such as clay interlayer, lenticular body region, often size shape is different, position is different in these hyposmosis regions, passes at this time
The enhanced aeration technology of system cannot be effectively removed the pollutant in these hyposmosis areas.Air has in higher permeability soil
Preferable aeration effect, when encountering the lower clay layer of permeability or lenticular body, aeration gas flow often selects horizontal direction
Movement then bypasses low-permeability contaminated area, is particularly easy to occur gas phase under heterogeneous site condition around flow phenomenon.
In the underground water aeration repair process of Polluted Soil, air-flow is to be flowed in the soil of high permeability in a manner of bubbling
, and flowed by way of microchannel in the soil compared with low-permeability, and the soil horizon (clay very low for permeability
Layer, lenticular body etc.) expose into air can not effectively pass through.Therefore, hyposmosis contaminated area soil can be directed to by finding one kind
Directional induction aeration recovery technique to the efficient recovery technique system of contaminated site improve and development be of great significance.
Summary of the invention
The technical issues of solving the problems, such as: being not easy aeration present invention aim to address above-mentioned hyposmosis contaminated area and repair,
A kind of hyposmosis contaminated area underground water aeration restorative procedure is provided, is reducing soil layer gas around hyposmosis area using thickening barrier
While body permeability hinders air-flow to pass through, hyposmosis soil layer gas permeability is improved using surfactant, is obstructed in thickening
Directional induction aeration gas flow passes through hyposmosis contaminated area under the synergistic effect of both agent and surfactant, to realize Pollution Field
The method that ground part low-permeability contaminated area is effectively repaired.
Technical solution: a kind of hyposmosis contaminated area underground water aeration restorative procedure injects around hyposmosis contaminated area and increases
Thick barrier makes soil layer gas permeability significant decrease around to which directional induction gas is flowed to hyposmosis contaminated area, simultaneously
Surfactant is injected in hyposmosis contaminated area and its underpart to improve gas in the permeability and pollutant of low-permeability soil layer
Desorption ability, then start aeration pump repaired.
Further, the thickening barrier is sodium carboxymethyl cellulose solution, and concentration is 700~900mg/L.
Further, the surfactant is sodium dodecyl benzene sulfonate aqueous solution, and concentration is 200~400mg/L.
Further, hyposmosis contaminated area and its around be respectively provided with aeration well, aeration well spacing is 6~13m；Aeration well
Inlet is located at 3~5m of hyposmosis contaminated area or less.
Further, thickening barrier is injected by injection well, and the spacing of injection well and hyposmosis contaminated area is less than 2m, note
The spacing for entering well is 3~7m.
Further, surfactant is injected by injection well, is injected depth from hyposmosis contaminated area top surface and is extended to dirt
Contaminate 2~3m of area or less.
The utility model has the advantages that sodium carboxymethylcellulose (Carboxymethylcellulose Sodium, CMC) is a kind of natural
The carboxyl methylation derivant of cellulose, while being also a kind of good thickener, aqueous solution can be significantly improved after being dissolved in water
Vicidity；Detergent alkylate sulphur sodium sulphate (Sodium Dodecyl Benzene Sulfonate, SDBS) be it is a kind of yin from
Sub- surfactant can reduce underground water surface tension, enhance gas in the penetrability of hyposmosis soil layer, while enhancing pollution
Object is from the desorption in soil.Thickening barrier sodium carboxymethylcellulose can be improved injection region after being added to underground water soil
Stickiness obstruct the passability of aeration gas flow, play good air-flow barrier action, so that directional induction aeration gas flow enters
Low-permeability contaminated area；Surfactant sodium dodecyl base benzene sulphur sodium sulphate injects hyposmosis Polluted area and its underpart can be in office
Underground water surface tension is reduced within the scope of portion, enhances the gas permeability of low-permeability soil layer, and the present invention utilizes thickening barrier
Realize that induction aeration fluid orientation is worn to air-flow barrier is carried out around hyposmosis contaminated area with the synergistic effect of surfactant
Too low permeable areas is solved hyposmosis contaminated area and is difficult to using conventional aeration technology to play the role of good aeration reinforcing
The problem of reparation.
Detailed description of the invention
Fig. 1 is the arrangement schematic diagram of hyposmosis contaminated area underground water aeration restorative procedure in embodiment 1, wherein 1 is barrier
Agent injection pump, 2 be barrier injection well, 3 be aeration pump, 4 be aeration well, 5 be surfactant injection pump, 6 be surface-active
Agent injection well, 7 be extraction pump 8 are extraction well.
Fig. 2 is that hyposmosis contaminated area underground water aeration restorative procedure injects range plane schematic diagram in embodiment 1；
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
Embodiment 1
A kind of hyposmosis contaminated area underground water aeration restorative procedure, includes the following steps:
1, hyposmosis contaminated area range and size are determined according to geology prospecting results, as shown in Figure 1, around hyposmosis contaminated area
Barrier injection well 2 is set, barrier injection well 2 is arranged within the scope of hyposmosis contaminated area certain distance in equilateral triangle,
Barrier injection well and hyposmosis contaminated area spacing are less than 2m, and injection well spacing is 3~7m, and barrier injection well 2 passes through pipeline
It is connected with barrier injection pump 1.As shown in Fig. 2, the barrier injected by barrier injection well 2 is by hyposmosis contaminated area packet
It encloses and joins together, barrier is sodium carboxymethylcellulose CMC aqueous solution, and mass concentration is 700~900mg/L.
2, it as shown in Figure 1, covering hyposmosis contaminated area and its surrounding are respectively provided with aeration well 4, is laid by equilateral triangle, aeration
Well 4 is connected by pipeline with aeration pump 3, and aeration well 4 should pass through hyposmosis Polluted area to 3~5m below, 4 spacing of aeration well
Between 6~13m.Aeration well distribution as shown in Figure 2 covering hyposmosis area and its surrounding a certain range.
3, as shown in Figure 1, covering entire hyposmosis contaminated area lays surfactant injection well 6, injection depth bounds are answered
2~3m of contaminated area or less is extended to from hyposmosis contaminated area top surface, surfactant injection well 6 passes through pipeline and surfactant
Injection pump 5 is connected, and surfactant is sodium dodecyl benzene sulfonate aqueous solution, and mass concentration is 200~400mg/L.Such as Fig. 2 institute
Presentation surface activating agent injection well distribution covering hyposmosis contaminated area.
4, extraction well 8 is laid in aeration zone, above underground water capillary saturated zone, extraction well 8 is by pipeline and takes out in shaft bottom
Pump 7 is mentioned to be connected.
5, specific restorative procedure is as follows: the CMC solution prepared being injected into target area by barrier injection pump, is stood
12h enables CMC solution diffusion mobility form gas hyposmosis plugged zone.CMC is a kind of good thickener, can be mentioned significantly
The stickiness of high underground water significantly reduces its gas permeability, by injecting barrier around hyposmosis Polluted area, increases
The retardancy that the contaminated area surrounding soil permeates gas increases so that directional induction aerating gas flows to hyposmosis contaminated area
The strong aeration gas flow flux in target stains areas.
While injecting CMC solution, surfactant SDBS solution is injected in hyposmosis contaminated area by injection pump
Portion and contaminated area following depth stand 12h, surfactant solution are enabled to fill in hyposmosis area and below with underground water
Mixing is divided to play a role.Surfactant can reduce underground water surface tension significantly, improve aeration gas flow to hyposmosis
The penetration capacity of contaminated area, while pollutant can be enhanced from the desorption ability in fine grained soil, so that improving aeration repairs effect
Fruit；After barrier and surfactant sufficiently act on, extraction pump is opened, will be pumped into aeration zone above hyposmosis Polluted area
Negative pressure starts the extracting of non-saturated region gas phase and vent gas treatment.Then start aeration pump, start underground water aeration operation in situ, it is real
The directional induction of existing hyposmosis contaminated area, which is aerated, repairs.
Claims (6)
1. a kind of hyposmosis contaminated area underground water aeration restorative procedure, it is characterised in that: inject and increase around hyposmosis contaminated area
Thick barrier makes soil layer gas permeability significant decrease around to which directional induction gas is flowed to hyposmosis contaminated area, simultaneously
Surfactant is injected in hyposmosis contaminated area and its underpart to improve gas in the permeability and pollutant of low-permeability soil layer
Desorption ability, then start aeration pump carry out aeration reparation.
2. hyposmosis contaminated area underground water aeration restorative procedure according to claim 1, it is characterised in that: the thickening resistance
It is sodium carboxymethyl cellulose solution every agent, concentration is 700 ~ 900 mg/L.
3. hyposmosis contaminated area underground water aeration restorative procedure according to claim 1, it is characterised in that: the surface is living
Property agent be sodium dodecyl benzene sulfonate aqueous solution, concentration be 200 ~ 400 mg/L.
4. hyposmosis contaminated area underground water aeration restorative procedure according to claim 1, it is characterised in that: in hyposmosis dirt
Dye area and its surrounding are respectively provided with aeration well, and aeration well spacing is 6 ~ 13m；Aeration well inlet be located at hyposmosis contaminated area or less 3 ~
5 m。
5. hyposmosis contaminated area underground water aeration restorative procedure according to claim 1, it is characterised in that: thickening barrier
It is injected by injection well, for the spacing of injection well and hyposmosis contaminated area less than 2 m, the spacing of injection well is 3 ~ 7 m.
6. hyposmosis contaminated area underground water aeration restorative procedure according to claim 1, it is characterised in that: surfactant
It is injected by injection well, injects depth from hyposmosis contaminated area top surface and extend to 2 ~ 3 m of contaminated area or less.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810678191.5A CN109078973A (en) | 2018-06-27 | 2018-06-27 | A kind of hyposmosis contaminated area underground water aeration restorative procedure |
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| CN201810678191.5A CN109078973A (en) | 2018-06-27 | 2018-06-27 | A kind of hyposmosis contaminated area underground water aeration restorative procedure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273381A (en) * | 2020-01-21 | 2020-06-12 | 张洋洋 | Improve visual distance's of wetland ecological auxiliary system |
Citations (7)
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| CN101792214A (en) * | 2009-12-28 | 2010-08-04 | 吉林大学 | Method for recovery of contaminated groundwater through in situ enhanced aeration |
| CN102936062A (en) * | 2012-10-30 | 2013-02-20 | 苏州唯盛环境修复科技有限公司 | Underground water pollution in-situ restoration method based on synchronous shattering hydrodynamic circulation |
| CN103896391A (en) * | 2014-04-17 | 2014-07-02 | 厦门大学 | Underground water remediation method using surfactant for reinforcement |
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| US5641020A (en) * | 1994-05-20 | 1997-06-24 | University Of Waterloo | Treatment of contaminated water in clays and the like |
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| CN102936062A (en) * | 2012-10-30 | 2013-02-20 | 苏州唯盛环境修复科技有限公司 | Underground water pollution in-situ restoration method based on synchronous shattering hydrodynamic circulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273381A (en) * | 2020-01-21 | 2020-06-12 | 张洋洋 | Improve visual distance's of wetland ecological auxiliary system |
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Application publication date: 20181225 |
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