CN106862257A - A kind of administering method of soil organic matter and mercury combined pollution - Google Patents
A kind of administering method of soil organic matter and mercury combined pollution Download PDFInfo
- Publication number
- CN106862257A CN106862257A CN201710006402.6A CN201710006402A CN106862257A CN 106862257 A CN106862257 A CN 106862257A CN 201710006402 A CN201710006402 A CN 201710006402A CN 106862257 A CN106862257 A CN 106862257A
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- soil
- organic matter
- plot
- mercury
- contaminated soil
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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
- B09C1/06—Reclamation of contaminated soil thermally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a kind of soil organic matter and the administering method of mercury combined pollution, pollution plot surface weeds, stone are removed first, compressed with rolling device；Described contaminated soil plot is covered using low-density polyethylene film, then is compressed with rolling device；Center rig in contaminated soil plot punches vertically downward, forms cylindrical bore；Four corners in contaminated soil plot are respectively perpendicular and are downwardly into single head heating rod；Cylindrical bore is connected with vavuum pump, drier, active carbon adsorber and aiutage successively respectively by pipeline；Start vavuum pump and heating rod, the organic matter and mercury in soil are realized separating under heat radiation and vacuum suction effect.The method that the present invention is used need not be continually introduced into air, and by heat radiation and strong suction function, idetified separation process realizes efficient in-situ immobilization.
Description
Technical field：
The present invention relates to soil pollution recovery technique field, and in particular to a kind of soil organic matter and mercury combined pollution are controlled
Reason method.
Technical background：
Organic pollution of soil refers to that its quantity and speed have exceeded soil after toxic organicses matter enters soil
The speed of catharsis, destroys nature dynamic equilibrium, the cumulative process of pollutant is gradually occupied advantage, so as to cause soil
Natural normal function imbalance, soil quality declines, and has influence on growing for crop, and yield and Quality Down.
Volatile organic contaminant-heavy-metal composite pollution is very universal in current soil, the sludge of sewage treatment plant, work
Industry waste water and dregs are toppled over and cause substantial amounts of soil Fl, the contaminated site of the enterprise such as oil, chemical industry, coking, pollutant with
Organic solvent class halogenated hydrocarbons is representative, is also often compounded with other pollutants such as heavy metal chromium, arsenic, lead, cadmium, mercury.It is more typical
Combined pollution is volatile organic matter-mercury soil Fl.According to the detection to the current most of organic polluted soils of China,
Wherein major pollutants have total petroleum hydrocarbon, and content contains mercury, mercury simultaneously up to 1786-40167mg/kg in some plot soil
Content reaches 2-2.69mg/kg, more than GB《Standard of soil environment quality》(GB15618-1995) III Standard value.
Mainly there are reducing process (CN101053689), Ozonation currently for the administering method of organic pollution of soil
(CN102513345A), animals and plants repairing method (CN104438298A), vacuumizing method (CN203875107U), elution method
(CN104307860A), solidification method (CN103881727), thermal desorption method (CN103506378A), microwave method
(CN103551373A).Although these methods can be repaired to organic material contaminated soil to a certain extent, all exist each
From deficiency.Development goes out a series of remediation of heavy metal-contaminated soil, such as immobilization/stabilization, drip washing, wash soil, change
Learn reduction, phytoremediation, microorganism remediation.But it is overall have that remediation efficiency is low, removing not thoroughly, long processing period, be processed into
The problems such as this is high.Recycling demand in view of contaminated land is urgent, and repairing efficiency is unsuitable oversize, from Technology for Heating Processing, can
Meet the objective requirement in domestic soil remediation market.
Position according to treatment pollution is different, administer organic matter-mercury combined contamination soil method be divided into in-situ immobilization and
Two kinds of showering.Showering is related to cut the earth and muck haulage, and can destroy original soil texture, may be difficult for topsoil
Degree is smaller, but for polluting deeper region, implements more difficult, and running cost is high, therefore, in-situ immobilization is reason
The selection thought.Gas phase of the prior art extracts recovery technique, when implementing to soil in be continually introduced into air stream, promote soil
The biology aerobic degradation process of some low volatile organics in earth.The greatest problem of the method is to need to be continually introduced into air,
And during for organic matter-mercury combined pollution, mercury is difficult to evaporate, it is necessary to pass through heat radiation and strong suction function, idetified separation
Process.
The content of the invention：
The administering method of a kind of soil organic matter of the present invention and mercury combined pollution, it is specific to be realized using following step：
(1), the organic matter of selection 5m × 5m and mercury combined contamination soil plot, remove plot surface weeds, stone, with stone roller
Pressure device is compressed, and contaminated soil plot surface is formed the level ground of consolidation；
(2) described contaminated soil plot is covered using low-density polyethylene film, then is compressed with rolling device
So that low-density polyethylene film is close to contaminated soil surface；
(3), the center rig in contaminated soil plot punches vertically downward, forms 10-15m deep, a diameter of 0.2m
Cylindrical bore；Four corners in contaminated soil plot are respectively perpendicular and are downwardly into that 10m is long, a diameter of 25mm single head adds
Hot pin；
(4), by cylindrical bore by pipeline respectively successively with vavuum pump, drier, active carbon adsorber and aiutage
It is connected, single head heating rod is connected with power supply respectively；Start vavuum pump and heating rod power supply, process time is lasting
30-60min；Organic matter and mercury in soil under heat radiation and vacuum suction effect, into cylindrical bore, by pipeline and
Vavuum pump, aiutage is entered after drying, charcoal absorption；
(5) vavuum pump and heating rod power supply, are closed, that is, realizes contaminated soil in-situ immobilization.
The administering method of a kind of soil organic matter and mercury combined pollution, in the step (4), the surface of single head heating rod is born
Lotus is 15-20W/cm2。
A kind of administering method of soil organic matter and mercury combined pollution, in the step (4), the system in cylindrical bore
Pressure is not higher than 20kpa.
A kind of administering method of soil organic matter and mercury combined pollution, in the step (4), the temperature in cylindrical bore
It is 300-350 DEG C.
The administering method of a kind of soil organic matter of the present invention and mercury combined pollution, reference《Standard of soil environment quality》
(GB15618-1995), using single factor contaminant index evaluation assessment, severe combined contamination soil is repaired.
The device of the administering method of a kind of soil organic matter of the present invention and mercury combined pollution, including electrothermal tube, cylindrical hole
Road, vavuum pump etc., described electrothermal tube one end connect power supply, in other end insertion soil, the cylindrical bore by pipeline according to
Secondary to be connected with vavuum pump, drier, active carbon adsorber, aiutage, the soil surface covers one layer of low density polyethylene (LDPE)
Film.
Relative to prior art, the beneficial effects of the present invention are：
1st, the present invention use method cause repair soil be in relatively closed system, in the presence of vavuum pump
Underground forms negative-pressure vacuum system so that the escaping gas such as organic pollution and mercury is easily accessible cylindrical bore, has been formed
Whole airflow route, heating tube heat radiation effect under, substantial amounts of heat vacuum suction effect under, with airflow route radiate
To Soil Surrounding, promote organic matter and mercury to volatilize by endlessly heat, realize efficiently separating；
2nd, volatile organic matter using vacuum thermal release method from soil efficient removal, due to negative pressure of vacuum, soil
In the condition of high temperature so that the volatile organic matter in soil is easily separated out, the purpose of removing is reached into gaseous state；
3rd, compared with prior art, the method that the present invention is used need not be continually introduced into air, by heat radiation and strong negative pressure
Effect, idetified separation process realizes efficient in-situ immobilization, without excavation soil treatment, cost of reducing investment outlay, by of the invention
Implement, severe combined contamination soil can be met after treatment《Standard of soil environment quality》(GB15618-1995) standard, warp
Ji benefit and environmental benefit are good.
Brief description of the drawings：
Fig. 1 is a kind of schematic device of the administering method of soil organic matter and mercury combined pollution；
In Fig. 1,1 is power supply, 2 is electrothermal tube, 3 is cylindrical bore, 4 is low-density polyethylene film, 5 is vavuum pump, 6
For drier, 7 be active carbon adsorber, 8 be aiutage.
Specific embodiment：
Embodiment 1：
(1), the organic matter of selection 5m × 5m and mercury combined contamination soil plot, before processing carry out volatile organic matter total amount
Detected with total mercury content；Plot surface weeds, stone are removed, is compressed with rolling device, contaminated soil plot surface is formed tightly
Real level ground；
(2) described contaminated soil plot is covered using low-density polyethylene film, then is compressed with rolling device
So that low-density polyethylene film is close to contaminated soil surface；
(3), the center rig in contaminated soil plot punches vertically downward, and formation 15m is deep, the cylinder of a diameter of 0.2m
Shape duct；Four corners in contaminated soil plot are respectively perpendicular and are downwardly into that 10m is long, the heating of single head of a diameter of 25mm
Rod；
(4) by cylindrical bore by pipeline respectively successively with vavuum pump, drier, active carbon adsorber and aiutage phase
Even, single head heating rod is connected with power supply respectively；Start vavuum pump and heating rod power supply, process time is lasting
60min, the surface loading of single head heating rod is 20W/cm2, the system pressure in cylindrical bore is 20kpa, cylindrical bore
Interior temperature is 350 DEG C.Organic matter and mercury in soil, into cylindrical bore, lead under heat radiation and vacuum suction effect
Piping and vavuum pump, aiutage is entered after drying, charcoal absorption.
(5) vavuum pump and heating rod power supply are closed, that is, realizes contaminated soil in-situ immobilization, carry out volatile organic matter
Total amount and total mercury content detect that test data is shown in Table 1.
The test result of 1 embodiment of table 1
Embodiment 2：
(1), the organic matter of selection 5m × 5m and mercury combined contamination soil plot, before processing carry out volatile organic matter total amount
Detected with total mercury content；Plot surface weeds, stone are removed, is compressed with rolling device, contaminated soil plot surface is formed tightly
Real level ground；
(2) described contaminated soil plot is covered using low-density polyethylene film, then is compressed with rolling device
So that low-density polyethylene film is close to contaminated soil surface；
(3), the center rig in contaminated soil plot punches vertically downward, and formation 10m is deep, the cylinder of a diameter of 0.2m
Shape duct；Four corners in contaminated soil plot are respectively perpendicular and are downwardly into that 10m is long, the heating of single head of a diameter of 25mm
Rod；
(4) by cylindrical bore by pipeline respectively successively with vavuum pump, drier, active carbon adsorber and aiutage phase
Even, single head heating rod is connected with power supply respectively；Start vavuum pump and heating rod power supply, process time is lasting
30min, the surface loading of single head heating rod is 15W/cm2, the system pressure in cylindrical bore is not higher than 20kpa, cylindrical
Temperature in duct is 300 DEG C.Organic matter and mercury in soil under heat radiation and vacuum suction effect, into cylindrical hole
Road, by pipeline and vavuum pump, aiutage is entered after drying, charcoal absorption.
(5) vavuum pump and heating rod power supply are closed, that is, realizes contaminated soil in-situ immobilization, carry out volatile organic matter
Total amount and total mercury content detect that test data is shown in Table 2.
The test result of 2 embodiment of table 2
Claims (4)
1. the administering method of a kind of soil organic matter and mercury combined pollution, it is characterised in that：Comprise the following steps：
(1), the organic matter of selection 5m × 5m and mercury combined contamination soil plot, remove plot surface weeds, stone, with rolling dress
Compression is put, contaminated soil plot surface is formed the level ground of consolidation；
(2) described contaminated soil plot is covered using low-density polyethylene film, then is caused with rolling device compression
Low-density polyethylene film is close to contaminated soil surface；
(3), the center rig in contaminated soil plot punches vertically downward, and formation 10-15m is deep, the cylinder of a diameter of 0.2m
Shape duct；Four corners in contaminated soil plot are respectively perpendicular and are downwardly into that 10m is long, the heating of single head of a diameter of 25mm
Rod；
(4), cylindrical bore is connected with vavuum pump, drier, active carbon adsorber and aiutage successively respectively by pipeline,
Single head heating rod is connected with power supply respectively；Start vavuum pump and heating rod power supply, process time continues 30-
60min；Organic matter and mercury in soil under heat radiation and vacuum suction effect, into cylindrical bore, by pipeline and true
Empty pump, aiutage is entered after drying, charcoal absorption；
(5) vavuum pump and heating rod power supply, are closed, that is, realizes contaminated soil in-situ immobilization.
2. the administering method of a kind of soil organic matter according to claim 1 and mercury combined pollution, it is characterised in that：It is described
In step (4), the surface loading of single head heating rod is 15-20W/cm2。
3. the administering method of a kind of soil organic matter according to claim 2 and mercury combined pollution, it is characterised in that：It is described
In step (4), the system pressure in cylindrical bore is not higher than 20kpa.
4. the administering method of a kind of soil organic matter according to claim 3 and mercury combined pollution, it is characterised in that：It is described
In step (4), the temperature in cylindrical bore is 300-350 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710006402.6A CN106862257A (en) | 2017-01-05 | 2017-01-05 | A kind of administering method of soil organic matter and mercury combined pollution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710006402.6A CN106862257A (en) | 2017-01-05 | 2017-01-05 | A kind of administering method of soil organic matter and mercury combined pollution |
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| CN106862257A true CN106862257A (en) | 2017-06-20 |
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| CN201710006402.6A Withdrawn CN106862257A (en) | 2017-01-05 | 2017-01-05 | A kind of administering method of soil organic matter and mercury combined pollution |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855354A (en) * | 2017-12-06 | 2018-03-30 | 江苏省环境科学研究院 | A kind of organic polluted soil thermal desorption prosthetic device and method |
| CN109127703A (en) * | 2018-10-30 | 2019-01-04 | 中国矿业大学 | A kind of contaminated soil in-situ remediation system and method |
| CN109226225A (en) * | 2018-04-02 | 2019-01-18 | 霍耀东 | A kind of novel modularized batch-type vacuum extraction thermal desorption processing system and method |
| CN109536172A (en) * | 2018-11-13 | 2019-03-29 | 南京师范大学 | A kind of material and restorative procedure of repairing organic and mercury contaminated soil |
| CN109530413A (en) * | 2018-10-23 | 2019-03-29 | 深圳市源清环境技术服务有限公司 | Soil restoring device and soil remediation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710123A (en) * | 2016-02-04 | 2016-06-29 | 周益辉 | Method for remediation of volatile organic compound and mercury compound contaminated soil |
-
2017
- 2017-01-05 CN CN201710006402.6A patent/CN106862257A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710123A (en) * | 2016-02-04 | 2016-06-29 | 周益辉 | Method for remediation of volatile organic compound and mercury compound contaminated soil |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855354A (en) * | 2017-12-06 | 2018-03-30 | 江苏省环境科学研究院 | A kind of organic polluted soil thermal desorption prosthetic device and method |
| CN109226225A (en) * | 2018-04-02 | 2019-01-18 | 霍耀东 | A kind of novel modularized batch-type vacuum extraction thermal desorption processing system and method |
| CN109226225B (en) * | 2018-04-02 | 2024-04-16 | 霍耀东 | Novel modularized sequencing batch vacuum extraction thermal desorption treatment system and method |
| CN109530413A (en) * | 2018-10-23 | 2019-03-29 | 深圳市源清环境技术服务有限公司 | Soil restoring device and soil remediation method |
| CN109127703A (en) * | 2018-10-30 | 2019-01-04 | 中国矿业大学 | A kind of contaminated soil in-situ remediation system and method |
| CN109536172A (en) * | 2018-11-13 | 2019-03-29 | 南京师范大学 | A kind of material and restorative procedure of repairing organic and mercury contaminated soil |
| CN109536172B (en) * | 2018-11-13 | 2020-10-02 | 南京师范大学 | Material and method for repairing organic matter and mercury-polluted soil |
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Application publication date: 20170620 |
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