CN104624634A - Chemical oxidation restoration method for organic polluted soil - Google Patents
Chemical oxidation restoration method for organic polluted soil Download PDFInfo
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- CN104624634A CN104624634A CN201510108244.6A CN201510108244A CN104624634A CN 104624634 A CN104624634 A CN 104624634A CN 201510108244 A CN201510108244 A CN 201510108244A CN 104624634 A CN104624634 A CN 104624634A
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- chemical oxidation
- organic polluted
- drilling rod
- polluted soil
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- 239000002689 soil Substances 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000000126 substance Substances 0.000 title claims abstract description 35
- 230000003647 oxidation Effects 0.000 title claims abstract description 22
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 30
- 239000007800 oxidant agent Substances 0.000 claims abstract description 19
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 15
- 230000001590 oxidative effect Effects 0.000 claims description 15
- 230000008439 repair process Effects 0.000 claims description 8
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 239000003002 pH adjusting agent Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 4
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 4
- 238000009418 renovation Methods 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 230000001351 cycling effect Effects 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000003814 drug Substances 0.000 abstract description 13
- 238000003756 stirring Methods 0.000 abstract description 7
- 238000011065 in-situ storage Methods 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract 3
- 238000005086 pumping Methods 0.000 abstract 2
- 239000002738 chelating agent Substances 0.000 abstract 1
- 238000010525 oxidative degradation reaction Methods 0.000 abstract 1
- 239000002957 persistent organic pollutant Substances 0.000 abstract 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 39
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 26
- 230000008569 process Effects 0.000 description 21
- 239000000356 contaminant Substances 0.000 description 14
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 14
- BFCFYVKQTRLZHA-UHFFFAOYSA-N 1-chloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1Cl BFCFYVKQTRLZHA-UHFFFAOYSA-N 0.000 description 13
- 239000000243 solution Substances 0.000 description 12
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 229960002163 hydrogen peroxide Drugs 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 238000005070 sampling Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910001448 ferrous ion Inorganic materials 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 239000012028 Fenton's reagent Substances 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- -1 iron ion Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention provides a chemical oxidation restoration method for organic polluted soil. The chemical oxidation restoration method for the organic polluted soil comprises the step of injecting a pH regulating agent, an oxidizing agent and a catalyst in situ to oxidize organic matters in soil and specifically comprises the following steps: in a to-be-restored soil region, drilling and stirring to the to-be-restored depth by utilizing a bored pile drilling machine, pumping the pH regulating agent by virtue of a flexible pipe arranged inside a drill rod by adopting a pump while the drill rod drills into the soil, uniformly distributing a medicament into the soil under the stirring action of the drill rod, and regulating pH of the soil to be in an appropriate range; and under the condition that a drill lifting rod is used for stirring, switching to an oxidizing agent pipeline and a catalyst pipeline by utilizing a valve, and pumping the oxidizing agent and the catalyst as well as a chelating agent into the soil by virtue of a pump, so that oxidative degradation on organic pollutants in the soil is realized.
Description
Technical field
The present invention relates to a kind of organic polluted soil chemical oxidation restorative procedure, belong to field of environment engineering technology, be adapted to the reparation of the multiclass organic polluted soils such as chemical industry, oil, medicine, agricultural chemicals.
Background technology
The industrial development that modernizes is rapid, and increasing organic pollution enters in soil and groundwater, is difficult to, by microbial degradation in environment, cause soil pollution to be on the rise.Now, along with Chinese Urbanization, process of industrialization are accelerated, particularly city layout and industry restructuring, a lot of chemical enterprise is closed or resettlement.Territory, Production Area in Chemical Plants is subject to pollution in various degree due to the leakage in production process and other reasons.Enterprise close or the regional soil stayed after moving pollute comparatively serious, and content of organics is higher.Because chemical enterprise focuses mostly in city, current most of contaminated site is faced with conversion and the secondary development of land use, and the continuous migration and conversion of the pollutant in these soil, enters human body by respiratory tract, alimentary canal etc., threatens greatly human body stroke.
At present, the method for soil remediation has physical restoration, chemical restoration and biological restoration, and the mode of reparation has in-situ immobilization and showering.Comparatively large for contaminated area, the situation that pollutant levels are high, the quantities adopting physical method to need to consume is large, and repair not thorough, corresponding cost is also higher; Time needed for biological method is long, be difficult at short notice by pollutant removal, and chemical method is compared with the above two, there is obvious advantage, comprise pollutant insensitive, be swift in response, repair time is short, thoroughly, remediation efficiency is high, is thus more and more applied to the reparation of contaminated site in degraded.With regard to the mode of repairing, showering relates to shoveling and muck haulage, destroy the structure of native soil, be difficult to repair and pollute darker region, and running cost is high, meanwhile, in the process of shoveling, muck haulage, volatilization/semi-volatile organic matters a large amount of in soil is caused to transfer in air, cause secondary pollution, therefore gradually replace by in-situ immobilization.
Soil body deep mixing technique originates from Japan and the Sweden of nineteen sixties, is applied to Geotechnical Engineering field the earliest, domesticly formally technique is applied to Geotechnical Engineering in 1977.This technology was expanded to by US and European country in environmental geotechnical application respectively the 1980s and the nineties.Soil body deep mixing method is a kind of in-situ treatment technology, the required material injected---is generally cement---by being equipped with the hollow drill of augers and stirring vane to be injected into the soil body, drilling rod traction to different depth, rotating agitation blades by inject material and soil shear failure even.
Multiplex Strong oxdiative method in chemical treatment method, makes metallic element in pollutant be oxidized to stable compound, then be able to rehabilitating soil through microbial degradation in soil.Conventional oxidant is hydrogen peroxide associating ferrous sulfate and Fenton reagent.Its principle is that hydrogen peroxide easily decomposes in the basic conditions, and in conjunction with ferrous sulfate, catalyzing hydrogen peroxide produces hydroxy radical, thus reaches oxidation object.But ferrous ion is easily oxidized to iron ion, therefore need to add adjuvant simultaneously, keep the stability of ferrous ion.These technology Problems existing have: Injection Well need be excavated to contaminated district, and excavation can produce spoir, and especially contaminated spoir need through extra process.Secondly, these technology are only applicable in the unsaturation soil body, and the general degree of depth of repairing is more shallow, and is greatly limited by soil body permeability, and when damaged formation is positioned at saturation region or contaminated soil layer infiltration coefficient is lower or clay content is higher, these methods cannot be implemented.Again, reagent injection rate is wayward, and injection rate is too small, and reparation can be caused not thorough; Injection rate is excessive, then may cause, in the air of more than volatile contaminant gas escape to ground, causing further pollution.When pollutant, vertically distribution is comparatively large, and when concentration vertically changes greatly, conventional method cannot be injected for the pollution concentration of different depth and repair reagent in right amount.
Summary of the invention
The object of the invention is to provide a kind of organic polluted soil chemical oxidation restorative procedure, it is characterized in that the depth of soil being got into needs reparation by rig, in the process of creeping into, stir soil by the paddle on drilling rod, add medicament by the dosing flexible pipe that drilling rod is built-in, realize the Homogeneous phase mixing of medicament and soil with this, realize the in-situ immobilization of contaminated soil, wide accommodation.Realize especially by following technical scheme, step:
The invention provides a kind of organic polluted soil chemical oxidation treatment method, comprise the following steps:
(1) region of repairing is being needed to lay brill site;
(2) stake machine be placed in the soil region needing to repair and aim at brill site, starting stake machine and drilling rod is crept in soil;
(3) when rod boring, by flexible pipe built-in in drilling rod, pH adjusting agent is squeezed in soil with killer injecting pump;
(4), after getting into the depth of soil needing to repair at drilling rod, start to carry on drilling rod, while carrying drilling rod, renovation agent is squeezed in soil;
(5) cycling step (3) and (4) are until reach predetermined chemical feeding quantity;
(6) get time soil sample every 4h to detect, within one day, get 2 times.
Preferably, in step (4), renovation agent is oxidant or is oxidant and catalyst.
Preferably, in step (4), while carrying drilling rod, by two-way flexible pipe built-in in drilling rod, catalyst and oxidant are squeezed in soil with killer injecting pump;
Preferably, rig more than described rig single shaft rig or single shaft, the drilling rod namely rig installed is at least one.
Preferably, with paddle bottom described drilling rod.
Preferably, described pH adjusting agent is acid solution or alkali lye, is selected from least one in sulfuric acid, hydrochloric acid, NaOH, potassium hydroxide, calcium hydroxide and lime.
Preferably, described pH is adjusted to 3-5 or is greater than 11, is more preferably 3,3.5,4,4.5,5 or 11 or 11.5.
Preferably, described oxidant is selected from least one in hydrogen peroxide, sodium peroxydisulfate solution and liquor potassic permanganate.
Preferably, catalyst is at least one in copperas solution, manganese dioxide, frerrous chloride and titanium dioxide.
Preferably, the concentration of oxidant is 1-50%, 10-20%, preferably 15%; Dosage is 100-1000L/h, preferred 500-800L/h, preferably 500,600,650 or 800;
The concentration of catalyst is 1-50%, 10-20%, preferably 15%; Dosage 200-800 L/h, preferred 500-600L/h;
Preferably, the built-in flexible pipe of drilling rod is two-way, is respectively catalyst conduit and oxidant pipeline.
Preferably, rod boring is wanted slowly with mentioning, and speed, not higher than 20m/h, is preferably 15m/h.
Preferably, organic contaminants in soil neighbour (to) nitro chlorobenzene, benzene, chlorobenzene, nitrobenzene, concentration is respectively 2430-2530mg/kg, 212-262mg/kg, 320-356 mg/kg, 325-550mg/kg.
feature of the present invention is as follows:
(1) organic polluted soil chemical oxidation of the present invention reparation is in-situ immobilization.
(2) restorative procedure construction of the present invention is simple, and wide accommodation, construction cost is low.
(3) restorative procedure of the present invention is adapted to the application of various chemical medicaments.
(4) restorative procedure of the present invention, adopts Zuan Tu limit, limit to stir, injects medicament simultaneously, effectively ensure that the Homogeneous phase mixing of soil and medicament, improve the oxidation effectiveness of medicament.。
Accompanying drawing explanation
Fig. 1; Soil chemistry oxidation prosthetic device
Apply chemical oxidation restorative procedure of the present invention, needing the region of repairing to be evenly arranged site, the size in each site is 0.6 × 0.46m; Mobile installation aims at site to the drill bit 1 on drilling rod 2, opens motor 3 and drilling rod is rotated; Drilling rod is made to pierce in soil by loosening lifting rope 5; In the process of creeping into, the 6 pairs of soil of the paddle on drilling rod 2 carry out cutting and stir, and meanwhile, add pH adjusting agent by built-in flexible pipe 7,8, and medicament sprays in soil by spray medicine mouth, realizes the Homogeneous phase mixing of medicament and soil with this; After drill bit 1 is drilled into the predetermined degree of depth, lifting rope 5 is pulled to make drilling rod slowly increase; In the process risen, switch dosing pipe, in built-in flexible pipe, 7 pass in catalyst, flexible pipe 8 and pass into oxidant, and medicament sprays in soil by spray medicine mouth, utilizes the paddle 6 on drilling rod 2 to make itself and soil Homogeneous phase mixing, reaches fully oxidized object; After a some position has processed, mobile slide bar 10, makes a machine move to next site and processes.
Detailed description of the invention
Chemical plant, former Nanjing organic polluted soil block 1, organic contaminants in soil be mainly neighbour (to) nitro chlorobenzene, benzene, chlorobenzene, nitrobenzene, concentration is respectively 2530mg/kg, 252mg/kg, 356mg/kg, 530mg/kg.Processing by method of the present invention, is that 0.6 × 0.46m arranges 2500 sites Polluted area by each site size, and during each site process, the speed of rod boring is 15m/h, and when lower brills, the pH value passing into the sulfuric acid solution adjustment soil of 50% is 3; When carrying brill, speed is 15m/h, by pipeline switch add concentration be 15% the ferrous and concentration of catalyst sulfuric acid be 15% oxidants hydrogen peroxide solution, dosage is 600L/h and 800L/h, after process, interval sampling in two days detects, organic contaminants in soil neighbour (to) nitro chlorobenzene concentration is reduced to 15.15mg/kg, benzene concentration is reduced to 3.3 mg/kg, chlorobenzene concentration is reduced to 2.1 mg/kg, nitro phenenyl concentration is reduced to 5.1mg/kg.
embodiment 2
Chemical plant, former Nanjing organic polluted soil block 830m
2, organic contaminants in soil be mainly neighbour (to) nitro chlorobenzene, benzene, chlorobenzene, nitrobenzene, concentration is respectively 2430mg/kg, 212mg/kg, 350mg/kg, 550mg/kg.Processing by method of the present invention, is that 0.6 × 0.46m arranges 2500 sites Polluted area by each site size, and during each site process, the speed of rod boring is 20m/h, and when lower brills, the pH value passing into the sulfuric acid solution adjustment soil of 30% is 5; When carrying brill, speed is 20m/h, by pipeline switch add concentration be 10% the ferrous and concentration of catalyst sulfuric acid be the hydrogenperoxide steam generator of 15%, dosage is 500L/h and 650L/h, after process, interval sampling in two days detects, organic contaminants in soil neighbour (to) nitro chlorobenzene concentration is reduced to 16.15mg/kg, benzene concentration is reduced to 3.5mg/kg, chlorobenzene concentration is reduced to 2.9 mg/kg, nitro phenenyl concentration is reduced to 4.7mg/kg.
embodiment 3
Chemical plant, former Nanjing organic polluted soil 750m
2, organic contaminants in soil be mainly neighbour (to) nitro chlorobenzene, benzene, chlorobenzene, nitrobenzene, concentration is respectively 2530mg/kg, 262mg/kg, 320mg/kg, 510mg/kg.Processing by method of the present invention, is that 0.6 × 0.46m arranges 2500 sites Polluted area by each site size, and during each site process, the speed of rod boring is 30m/h, and when lower brills, the pH value passing into the sulfuric acid solution adjustment soil of 30% is 4.5; When carrying brill, speed is 30m/h, by pipeline switch add concentration be 20% the ferrous and concentration of catalyst sulfuric acid be the hydrogenperoxide steam generator of 25%, dosage is 500L/h and 600L/h, after process, interval sampling in two days detects, organic contaminants in soil neighbour (to) nitro chlorobenzene concentration is reduced to 24.15mg/kg, benzene concentration is reduced to 13.5mg/kg, chlorobenzene concentration is reduced to 12.9 mg/kg, nitro phenenyl concentration is reduced to 7.7mg/kg.
embodiment 4
Chemical plant, former Nanjing organic polluted soil 2000m
2, organic contaminants in soil be mainly neighbour (to) nitro chlorobenzene, benzene, chlorobenzene, nitrobenzene, concentration is respectively 2480mg/kg, 234mg/kg, 340mg/kg, 410mg/kg.Processing by method of the present invention, is that 0.6 × 0.46m arranges 2500 sites Polluted area by each site size, and during each site process, the speed of rod boring is 15m/h, and when lower brills, the pH value passing into the sulfuric acid solution adjustment soil of 30% is 4; When carrying brill, speed is 20m/h, by pipeline switch add concentration be 10% the ferrous and concentration of catalyst sulfuric acid be the liquor potassic permanganate of 10%, dosage is 500L/h and 600L/h, after process, interval sampling in two days detects, organic contaminants in soil neighbour (to) nitro chlorobenzene concentration is reduced to 14.15mg/kg, benzene concentration is reduced to 3.5mg/kg, chlorobenzene concentration is reduced to 6.9 mg/kg, nitro phenenyl concentration is reduced to 8.7mg/kg.
embodiment 5
Chemical plant, former Nanjing organic polluted soil block, organic contaminants in soil be mainly neighbour (to) nitro chlorobenzene, benzene, chlorobenzene, nitrobenzene, concentration is respectively 2443mg/kg, 232mg/kg, 326mg/kg, 325mg/kg.Process by method of the present invention, be that 0.6 × 0.46m arranges 4500 sites Polluted area by each site size, during each site process, the speed of rod boring is 20m/h, when lower brill, the liquid caustic soda solution passing into 10% regulate the pH value of soil be 11 and more than; When carrying brill, speed is 15m/h, switched by pipeline and add the oxidant sodium peroxydisulfate solution that concentration is 10%, dosage is 500L/h, after process, interval sampling in a week detects, organic contaminants in soil neighbour (to) nitro chlorobenzene concentration is reduced to 17.33mg/kg, benzene concentration is reduced to 4.19 mg/kg, chlorobenzene concentration is reduced to 3.28mg/kg, nitro phenenyl concentration is reduced to 1.57mg/kg.
embodiment 6
Chemical plant, former Nanjing organic polluted soil block, organic contaminants in soil be mainly neighbour (to) nitro chlorobenzene, benzene, chlorobenzene, nitrobenzene, concentration is respectively 2343mg/kg, 241mg/kg, 316mg/kg, 369mg/kg.Process by method of the present invention, be that 0.6 × 0.46m arranges 4500 sites Polluted area by each site size, during each site process, the speed of rod boring is 20m/h, when lower brill, the liquid caustic soda solution passing into 10% regulate the pH value of soil be 11 and more than; When carrying brill, speed is 15m/h, switched by pipeline and add the oxidant sodium peroxydisulfate solution that concentration is 15%, dosage is 400L/h, after process, interval sampling in a week detects, organic contaminants in soil neighbour (to) nitro chlorobenzene concentration is reduced to 37.33mg/kg, benzene concentration is reduced to 34.19 mg/kg, chlorobenzene concentration is reduced to 13.25mg/kg, nitro phenenyl concentration is reduced to 21.53mg/kg.。
Above-mentioned detailed description is illustrating for one of them possible embodiments of the present invention, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of technical solution of the present invention.
Claims (10)
1. an organic polluted soil chemical oxidation treatment method, is characterized in that, comprises the following steps:
(1) region of repairing is being needed to lay brill site;
(2) stake machine be placed in the soil region needing to repair and aim at brill site, starting stake machine and drilling rod is crept in soil;
(3) when rod boring, by flexible pipe built-in in drilling rod, pH adjusting agent is squeezed in soil with killer injecting pump;
(4), after getting into the depth of soil needing to repair at drilling rod, start to carry on drilling rod, while carrying drilling rod, renovation agent is squeezed in soil;
(5) cycling step (3) and (4) are until reach predetermined chemical feeding quantity;
(6) get time soil sample every 4h to detect, within one day, get 2 times.
2. organic polluted soil chemical oxidation restorative procedure according to claim 1, is characterized in that, rig more than described rig single shaft rig or single shaft, the drilling rod namely rig installed is at least one, with paddle bottom described drilling rod.
3. the organic polluted soil chemical oxidation restorative procedure according to right 1, is characterized in that: in step (4), renovation agent is oxidant or is oxidant and catalyst.
4. the organic polluted soil chemical oxidation restorative procedure according to right 1, is characterized in that: in step (4), while carrying drilling rod, catalyst and oxidant is squeezed in soil by two-way flexible pipe built-in in drilling rod with killer injecting pump.
5. the organic polluted soil chemical oxidation restorative procedure according to right 1, it is characterized in that, described pH adjusting agent is acid solution or alkali lye, is selected from least one in sulfuric acid, hydrochloric acid, NaOH, potassium hydroxide, calcium hydroxide, lime.
6. the organic polluted soil chemical oxidation restorative procedure according to right 1, is characterized in that, described oxidant is selected from least one in hydrogen peroxide, sodium peroxydisulfate solution and liquor potassic permanganate.
7. the organic polluted soil chemical oxidation restorative procedure according to right 1, is characterized in that, catalyst is at least one in copperas solution, manganese dioxide, frerrous chloride and titanium dioxide.
8. the organic polluted soil chemical oxidation restorative procedure according to right 1, is characterized in that: rod boring is wanted slowly with mentioning, and speed, not higher than 20m/h, is preferably 15m/h.
9. the organic polluted soil chemical oxidation restorative procedure according to right 1, is characterized in that: the concentration of oxidant is 10-20%, preferably 15%; Dosage is 500-800L/h.
10. the organic polluted soil chemical oxidation restorative procedure according to right 1, is characterized in that: the concentration of catalyst is 10-20%, and dosage is 500-600L/h.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149335A (en) * | 2015-06-24 | 2015-12-16 | 武汉都市环保工程技术股份有限公司 | In-situ chemical oxidation restoration construction method for organic contaminated soil |
| CN105642665A (en) * | 2016-04-07 | 2016-06-08 | 北京中岩大地科技股份有限公司 | Method for repairing heavy metal contaminated site in situ by adopting stirring and injection system |
| CN105689384A (en) * | 2016-02-02 | 2016-06-22 | 深圳粤鹏环保技术股份有限公司 | Oxidizing agent for degrading organic contaminated soil of coking plant and use method |
| CN105710125A (en) * | 2016-04-21 | 2016-06-29 | 济南大学 | Chemical repairing method for organic pollution soil |
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| CN109821879A (en) * | 2019-02-13 | 2019-05-31 | 云南天朗环境科技有限公司 | A kind of deep subsoil stirring technique and device for organic pollution in-situ immobilization |
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| CN105642665A (en) * | 2016-04-07 | 2016-06-08 | 北京中岩大地科技股份有限公司 | Method for repairing heavy metal contaminated site in situ by adopting stirring and injection system |
| CN105710125A (en) * | 2016-04-21 | 2016-06-29 | 济南大学 | Chemical repairing method for organic pollution soil |
| CN106053766A (en) * | 2016-07-27 | 2016-10-26 | 武汉都市环保工程技术股份有限公司 | Method for quickly determining content of sodium peroxydisulfate in soil |
| CN106053766B (en) * | 2016-07-27 | 2018-06-26 | 武汉都市环保工程技术股份有限公司 | A kind of method of sodium peroxydisulfate content in quick measure soil |
| CN106238455A (en) * | 2016-10-25 | 2016-12-21 | 苏州同和环保工程有限公司 | For repairing the device and method of deep layer Polluted Soil |
| CN107214189A (en) * | 2017-07-19 | 2017-09-29 | 河北煜环环保科技有限公司 | A kind of organic material contaminated soil renovation technique |
| CN107597834A (en) * | 2017-09-22 | 2018-01-19 | 吴洪生 | A kind of place organic contamination chemical oxidation photocatalysis combined remediation technology and application |
| CN108398539A (en) * | 2018-01-30 | 2018-08-14 | 上海岩土工程勘察设计研究院有限公司 | Polluted Soil stir in situ uniformity evaluation method |
| CN108398539B (en) * | 2018-01-30 | 2023-09-22 | 上海勘察设计研究院(集团)有限公司 | Polluted soil in-situ stirring uniformity evaluation method |
| CN108339849A (en) * | 2018-02-07 | 2018-07-31 | 武汉瑞景环境修复工程有限公司 | Soil-repairing agent and method for renovation of organic pollution or mercury contaminated soil |
| CN108160701A (en) * | 2018-04-10 | 2018-06-15 | 上海岩土工程勘察设计研究院有限公司 | Suitable for the in-situ immobilization maintenance process of Polluted Soil shallow-layer stirring |
| CN108580539A (en) * | 2018-04-18 | 2018-09-28 | 浙江大学 | A kind of method of chemical oxidation coupling microorganism remediation organic polluted soil |
| CN108372195A (en) * | 2018-05-15 | 2018-08-07 | 武汉农尚环境股份有限公司 | A kind of method that oxidizing process collaboration lawn plant repairs petroleum hydrocarbon contaminated soil |
| CN109821879A (en) * | 2019-02-13 | 2019-05-31 | 云南天朗环境科技有限公司 | A kind of deep subsoil stirring technique and device for organic pollution in-situ immobilization |
| CN109821879B (en) * | 2019-02-13 | 2022-06-07 | 云南天朗环境科技有限公司 | Soil deep layer stirring process and device for organic matter pollution in-situ remediation |
| CN110014036A (en) * | 2019-04-24 | 2019-07-16 | 广西博世科环保科技股份有限公司 | A kind of method that heat strengthens assisted in situ chemical oxidation renovation of organic pollution soil |
| CN110079322A (en) * | 2019-04-30 | 2019-08-02 | 湖南省和清环境科技有限公司 | A kind of polycyclic aromatic hydrocarbon pollution treatment formulations and method and purposes |
| CN114011871A (en) * | 2021-10-20 | 2022-02-08 | 上海应用技术大学 | Method for oxidizing and degrading pollutants in soil by catalyzing chlorine dioxide |
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