CN109985895A - Organic polluted soil prosthetic device and method - Google Patents
Organic polluted soil prosthetic device and method Download PDFInfo
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- CN109985895A CN109985895A CN201910192475.8A CN201910192475A CN109985895A CN 109985895 A CN109985895 A CN 109985895A CN 201910192475 A CN201910192475 A CN 201910192475A CN 109985895 A CN109985895 A CN 109985895A
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- 239000002689 soil Substances 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000003463 adsorbent Substances 0.000 claims abstract description 61
- 238000003795 desorption Methods 0.000 claims abstract description 31
- 238000001556 precipitation Methods 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000010802 sludge Substances 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000001179 sorption measurement Methods 0.000 claims abstract description 10
- 239000000706 filtrate Substances 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 7
- 239000000047 product Substances 0.000 claims abstract description 6
- 230000007717 exclusion Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 239000005416 organic matter Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims description 4
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 4
- 229920000053 polysorbate 80 Polymers 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 229920002873 Polyethylenimine Polymers 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 claims description 3
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 3
- 229920002492 poly(sulfone) Polymers 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 2
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims 1
- 238000005067 remediation Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 241000196324 Embryophyta Species 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 4
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003900 soil pollution Methods 0.000 description 2
- 239000002594 sorbent Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 238000002137 ultrasound extraction Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 229940080818 propionamide Drugs 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000003802 soil pollutant Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000036642 wellbeing Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of organic polluted soil prosthetic device and methods, the device includes sequentially connected exclusion device, deironing apparatus, grading plant, desorption apparatus, first stage precipitation tank, adsorbent equipment and second-level settling pond, first stage precipitation tank bottom is provided with the first sludge pipe, first sludge pipe is connected with the first filter device, the filtrate (liquid of first filter device and the feeding inlet of adsorbent equipment connect, the overflow outlet of second-level settling pond and the feeding inlet of desorption apparatus connect, two-stage precipitation bottom of pond portion is provided with the second sludge pipe, second sludge pipe is connected with the second filter device, grading plant products therefrom includes bulk soil, soil coarse grained and fine-grained soil, flocculant is respectively provided in first stage precipitation tank and second-level settling pond, desorbing agent is housed in desorption apparatus, it adsorbs and adsorbent is housed in adsorption device.The present invention has the advantages that process is simple, organic removal rate is high, short processing time, at low cost, without secondary pollution, can carry out large-scale soil remediation well.
Description
Technical field
The present invention relates to technical field of soil remediation, and in particular to a kind of organic polluted soil prosthetic device and method.
Background technique
In recent years, the level of economic development in China improves rapidly, and urbanization process is accelerated, industrialized mode occur compared with
Big change, a large amount of industrial and mineral land used receive biggish pollution.The most serious is industrial lands for pollution level, pollute
Range compares concentration, and the depth of pollution reaches beneath tens of rice, and underground water and soil all receive serious pollution.Soil
After pollution living resources diversity is increasingly reduced, land resource is increasingly in short supply, this seriously threatens the health of human body, life
Stabilization and social harmony of state environment etc..Although although China has formulated the text of corresponding specification contaminated site environmental management
Part, but it is fewer to ambient soil repairing research, and therefore, repairing situation to soil pollution and study has important show
Sincere justice.In face of severe soil remediation and environmental protection problem, we will reinforce Ecological Civilization Construction, promote a conservation culture
It is the relationship well-being of the people, concerning the national following matter of fundamental importance.Overall situation sight, long-range sight, entirety are established according to Green Development theory
It sees, adheres to that protection is preferential, adhere to the fundamental state policy for economizing on resources and protecting environment.
The soil pollution of chemical industrial waste land used is serious at present, wherein organic matter especially benzene homologues and polycyclic aromatic hydrocarbon etc. is organic
Object is most important pollutant, existing soil remediation method is at high cost, it is complicated for operation, easily cause secondary pollution, it would be highly desirable to develop
A kind of Organically-pollutedsoil soil remediation method of green high-efficient.
Summary of the invention
Purpose provided by the invention is to provide a kind of organic polluted soil prosthetic device and method, easy to operate, cost
Low, treatment effeciency is high, high treating effect.
To achieve the above object, The technical solution adopted by the invention is as follows: a kind of organic polluted soil prosthetic device, packet
It is heavy to include sequentially connected exclusion device, deironing apparatus, grading plant, desorption apparatus, first stage precipitation tank, adsorbent equipment and second level
Shallow lake pond, the first stage precipitation tank bottom are provided with the first sludge pipe, and first sludge pipe is connected with the first filter device, institute
The feeding inlet of the filtrate (liquid and adsorbent equipment of stating the first filter device connects, and the overflow of the second-level settling pond is exported and taken off
The feeding inlet of adsorption device connects, and the two-stage precipitation bottom of pond portion is provided with the second sludge pipe, and second sludge pipe is connected with the
Two filter devices, the grading plant products therefrom include bulk soil, soil coarse grained and fine-grained soil, the level-one precipitating
It is respectively provided with flocculant in pond and second-level settling pond, desorbing agent is housed in the desorption apparatus, is equipped in the absorption adsorption device
Adsorbent.
Preferably, partial size > 3mm of the bulk soil, the partial size >=0.5mm and≤3mm of the soil coarse grained, it is described
Partial size < 0.5mm of fine-grained soil.
Preferably, the flocculant is selected from cationic-type polyacrylamide, polysulfones, aluminum sulfate, aluminium oxide, iron chloride, sulphur
Sour ferrous iron, carboxymethyl cellulose, polyethyleneimine or polyethylene oxide one or more.
Preferably, the desorbing agent is in the mixture of Tween-80, DNP-10, SDS, CTAB, TX-100 and EDTA
One or more.
It is furthermore preferred that the mass ratio of TX-100 and EDTA are (3-5): 1 in the mixture of the TX-100 and EDTA.
Preferably, the adsorbent is selected from one of coke, active carbon, montmorillonite or modified coke powder, the grain of adsorbent
Degree is less than or equal to 0.5mm, and adsorbent specific surface area is 25-1000m2/g。
Preferably, the preparation step of the modified coke powder is: sulfuric acid or nitric acid solution of the coke powder through pH=1~5 are modified
It obtains, it is 1kg that the granularity of the coke powder, which is less than or equal to 0.5mm, coke powder and sulfuric acid or the mass volume ratio of nitric acid solution:
(100-150)ml。
It is including following the present invention also provides a kind of method for carrying out organic polluted soil reparation based on above-mentioned prosthetic device
Step:
(1) above-mentioned prosthetic device is opened, organic polluted soil is subjected to removal of impurities with except iron, removes wherein non-soil part
And iron compound, it subsequently enters grading plant and is classified, isolate bulk soil, soil coarse grained and fine-grained soil；
(2) bulk soil and soil coarse grained are recycled respectively, fine-grained soil is passed through desorption apparatus, in desorbing agent
It is desorbed under effect；Material after desorption is passed through first stage precipitation tank and is precipitated, and overflow obtained by first stage precipitation tank is passed through suction
Organic matter is adsorbed in adsorption device, underflow obtained by first stage precipitation tank is passed through in the first filter device, the first filtering is filled
Filtrate obtained by setting, which is passed through in adsorbent equipment, adsorbs organic matter；
(3) overflow obtained by second-level settling pond is passed through desorption apparatus by being passed into adsorbent equipment in second-level settling pond
Underflow obtained by second-level settling pond is passed through in the second filter device by middle recycling, by adsorbent obtained by the second filter device into
It is added in adsorbent equipment and is recycled after the processing of row desorption.
Preferably, the additive amount of the flocculant is the 1wt%-5wt% of material in sedimentation basin, the additional amount of desorbing agent
For the 0.02wt%-0.05wt% of material in desorption apparatus, the additive amount of the adsorbent is material in adsorbent equipment
1wt%-5wt%.
Preferably, the mixing speed of desorption process is 150-300r/min, time 30-60min.
Preferably, the mixing speed of adsorption process is 100-200r/min, time 30-60min.
Compared with prior art, the invention has the following beneficial effects:
(1) it utilizes and adsorbent is made by raw material of the lower coke powder of coke-oven plant's added value, will successfully be enriched in the soil
Pollutant be transferred in adsorbent material, and this adsorbent is cheap and easy to get, and absorption can directly carry out benefit as heat source later
With.
(2) the design of the invention is scientific and reasonable, has that process is simple, organic pollutant removal rate is high, treating capacity is big, processing
Time short, at low cost, without secondary pollution advantage, can carry out the reparation of large-scale organic polluted soil well.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of 1 organic polluted soil prosthetic device of the embodiment of the present invention.
Fig. 2 is the process flow chart of 1 Organically-pollutedsoil soil remediation method of the embodiment of the present invention.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of organic polluted soil prosthetic device, including sequentially connected exclusion device, deironing apparatus,
Grading plant, desorption apparatus, first stage precipitation tank, adsorbent equipment and second-level settling pond, wherein the first stage precipitation tank bottom is set
Be equipped with the first sludge pipe, first sludge pipe is connected with the first filter device, the filtrate (liquid of first filter device with
The feeding inlet of adsorbent equipment connects, and the overflow outlet of the second-level settling pond and the feeding inlet of desorption apparatus connect, the second level
Precipitating bottom of pond portion is provided with the second sludge pipe, and second sludge pipe is connected with the second filter device, the grading plant gained
Product includes bulk soil, soil coarse grained and fine-grained soil, and flocculation is respectively provided in the first stage precipitation tank and second-level settling pond
Agent, the flocculant be selected from polyacrylamide, polysulfones, aluminum sulfate, aluminium oxide, iron chloride, ferrous sulfate, carboxymethyl cellulose,
The one or more of polyethyleneimine or polyethylene oxide, the additive amount of flocculant are the 1wt%- of material in sedimentation basin
5wt%；Desorbing agent is housed, the desorbing agent is selected from Tween-80, DNP-10, SDS, CTAB, TX-100 in the desorption apparatus
One or more of with the mixture of EDTA, it is furthermore preferred that in the mixture of the TX-100 and EDTA, TX-100 and
The mass ratio of EDTA is (3-5): 1, the additional amount of desorbing agent is the 0.02wt%-0.05wt% of material in desorption apparatus；It is described
It adsorbs and adsorbent is housed in adsorption device, the adsorbent is selected from one of coke, active carbon, montmorillonite or modified coke powder, inhales
Attached dose of granularity is less than or equal to 0.5mm, and adsorbent specific surface area is 25-1000m2/ g, the additive amount of adsorbent are absorption dress
Set the 1wt%-5wt% of middle material.
In the present embodiment, exclusion device selects Multifunctional sundries filter screen, and deironing apparatus selects duct type powder to remove iron
Device, grading plant select spiral classifier, and desorption apparatus selects desorption agitator, and adsorbent equipment selects absorption agitator, described
The process flow chart of device is as shown in Fig. 2, its detailed process is as follows:
Organic polluted soil removes the sundries unless soil part after cleaning, then carries out except iron remover is removed after iron, by institute
Material is sent into spiral classifier, isolate bulk soil, soil coarse grained and fine-grained soil, then by soil coarse grained and fine grained soil
Earth crosses the sieve of 0.5mm, finally obtains the bulk soil of partial size > 3mm, soil coarse grained of the partial size between 0.5mm and 3mm,
The fine-grained soil of partial size < 0.5mm；Fine-grained soil is sent into desorption agitator, the first sedimentation basin is entered after being desorbed, is added
The flocculant cationic-type polyacrylamide of 1wt%, overflow enter absorption agitator, and adsorbent adsorbs organic matter, bottom
It flows through gained filtrate after filters pressing to be sent into absorption agitator, the mixing speed of adsorption process is 100-200r/min, and the time is
The soil of 30-60min, gained underflow can be post-processed, and absorption agitator resulting material is passed through in the second sedimentation basin, be added
The flocculant cationic-type polyacrylamide of 1wt%, gained overflow are sent into desorption agitator as recirculated water, desorption process
Mixing speed be 150-300r/min, time 30-60min, gained underflow through filters pressing, it is dry after obtain adsorbent, can be into
Row recycles.
Organic polluted soil reparation is carried out using 1 described device of embodiment, pollution source soil is from Xuzhou City of Jiangsu Province north
Soils In The Region within the industrial waste land used periphery 1km of square chlor-alkali genuine location, using soil described in NY/T 1121.1-2006
Method described in the acquisition of sample, processing and storage part is sampled.
Method described in acquisition, processing and storage part using pedotheque described in NY/T 1121.1-2006,
Contaminated site soil is taken daily, carries out preliminary crushing and screening, it is spare to cross 4.5mm sieve.Using in ultrasonic extraction measurement soil
PAHs content, steps are as follows:
Soil natural crosses 80 meshes after air-drying, and weighs 29g in 10mL centrifuge tube, organic solvent is added, ultrasound mentions in two times
It takes.4mL acetone and 4mL n-hexane are added for the first time, during which ultrasonic extraction 20min keeps water temperature to be no more than 25 DEG C, then from
The heart, high speed freezing centrifuge 4000r/min run 3min, separate supernatant；Second of addition 7mL n-hexane, ultrasound, from
The heart merges extracting solution twice.The excessively organic filter membrane of about 1mL mixed liquor is taken, it is to be measured to be sealed in l mL brown sample bottle.
Embodiment 2
The present embodiment is sorbent used the preparation method is as follows: the lower granularity of added value in coke-oven plant's product is taken to exist
0.5mm coke powder 10kg below, is added the sulfuric acid solution of pH=1~5 1000ml, and carries out the stirring of 150r/min, stirs
Process is 30min, then for 24 hours by solution left standstill, and solution is filtered, and filter cake is taken, and benefit is washed with deionized to neutrality, 90
DEG C drying.
Being detected former coke powder specific surface area is 25m2/ g, adsorbent specific surface area obtained are as follows: 85m2/g。
Other characterize datas of adsorbent:
Adsorbent is detected by XRF, and mineral content is as shown in the table.
1 adsorbent XRF testing result of table
Adsorbent is detected by XRD, the results showed that the existing characteristics peak when 2 θ=16.3 °, 25.1 ° are with 41.8 °, it is known that
The minerals that adsorbent described in the present embodiment mainly contains are mullite, and mullite is a kind of silicate mineral that property is stable,
With certain absorption property.In addition, there is also a small amount of gypsum and sillimanites in adsorbent described in the present embodiment.
The present embodiment concrete operations are as follows:
(1) obtained soil 10kg is subjected to removal of impurities except iron, and is passed into spiral classifier, separate partial size d >
Tri- 3mm, 0.5≤d≤3, d < 0.5mm particle size fractions.
(2) bulk of obtained 0.5mm≤d and soil coarse grained, which directly recycle, is used, by d < 0.5mm particle size fraction
Fine-grained soil, cross 0.5mm vibrating screen, oversize is recycled, and screenings is passed through desorption agitator, is added
The desorbing agent SDS of 0.02wt% is subject to strong stirring (mixing speed: 150r/min, time: 30min), to wherein organic matter
It is desorbed, desorption enters first stage precipitation tank later, in the cationic polyacrylamide (PAM) that 1wt% is wherein added, level-one
Sedimentation basin underflow is processed soil, carries out pressure-filteration drying later and is recycled, first stage precipitation tank overflow is passed through absorption
Adsorbent is added in agitator wherein, under stirring (speed: 150r/min, time: 50min) to desorption in water phase
Organic matter adsorbed.
(3) adsorbent equipment is passed into second-level settling pond, it is right in the poly- propionamide of cation that 1wt% is wherein added
Adsorbent carries out precipitation concentration, and the underflow of second-level settling pond carries out filters pressing, carries out recycling to adsorbent and is used, second level is heavy
The overflow in shallow lake pond can be passed through desorption agitator, be used as circular water replenishing.
Wherein, in soil content of organics detection method are as follows: use gas chromatography-mass spectrography system (Agilent
Technologies, 7890A-5975C) sample analysis is carried out, polycyclic aromatic hydrocarbon (PAHs) content is detected, the polycyclic aromatic hydrocarbon refers to
Be polycyclic aromatic hydrocarbon specified in HJ 892-2017.
Use DB-5MS chromatographic column, temperature program: 80 DEG C -160 DEG C -220 DEG C of initial temperature；Carrier gas is nitrogen, injector temperature
It is 320 DEG C, transmission line temperature is 300 DEG C, Splitless injecting samples, and sample volume is 1 μ L.Spectrometer ion source temperature is 200 DEG C, solvent
Delay time 6min, detector voltage 1kV, electron bombardment ionization source (El), ionization voltage 70eV.
The calculation method of organic removal rate are as follows:
A is organic removal rate, W1For the content of organics before contaminated soil processing, W2For in first stage precipitation tank underflow
Content of organics after reason in soil.
Experimental Research result is as shown in the table:
2 embodiment of table, 2 testing result
| Test serial number | Adsorbent amount w% | Organic removal rate w% |
| 1 | 1 | 72.1 |
| 2 | 2 | 75.2 |
| 3 | 3 | 77.5 |
| 4 | 4 | 80.6 |
| 5 | 5 | 84.5 |
Organic matter removal is incomplete if adsorbent is excessively few, excessively will increase the cost and subsequent recovery of adsorbent
With regenerated cost.
Embodiment 3
The present embodiment is sorbent used the preparation method is as follows: the lower granularity of added value in coke-oven plant's product is taken to exist
0.5mm coke powder 10kgg below, is added the sulfuric acid solution of 1500ml pH=5, and carries out the stirring of 150r/min, stirred
Journey is 30min, then for 24 hours by solution left standstill, and solution is filtered, and filter cake is taken, and benefit is washed with deionized to neutrality, 90 DEG C
Drying.
Through detecting, the specific surface area of adsorbent are as follows: 56m2。
Using adsorbent described in the present embodiment, additional amount 5% repairs soil with the identical method of embodiment 2
Multiple, obtaining organic removal rate is 75.3%.
Embodiment 4
After TX-100 and EDTA 5:1 in mass ratio are mixed, as desorbing agent, additional amount 0.05wt% uses embodiment
2 identical methods repair soil, and adsorbent additional amount is 5%, and obtaining organic removal rate is 78.5%.
Embodiment 5
Desorbing agent used in the present embodiment is Tween-80, and flocculant used is poly- in first stage precipitation tank and second-level settling pond
Sulfone (PSF), flocculant addition 5%, adsorbent additional amount are 5%, are repaired with the identical method of embodiment 2 to soil
Multiple, obtaining organic removal rate is 79.2%.
Embodiment 6
Choose active carbon (purchase producer: Jiangsu Xin Qitaitan industry Science and Technology Ltd., model: granular activated carbon, granularity
Are as follows: 1mm, specific surface area are as follows: 108m2/ g) it is used as adsorbent, soil is repaired with the identical method of embodiment 2, is adsorbed
Agent additional amount is 5%, and obtaining organic removal rate is 78.9%.
Comparative example 1
Directly use coke powder described in embodiment 2 as adsorbent, additional amount 5%, with the identical method pair of embodiment 2
Soil is repaired, and obtaining organic removal rate is 69.2%.
Comparative example 2
In step (2), after the coarse grain of obtained d≤3mm and fine-grained soil are crossed 3mm vibrating screen, screenings is passed through
Agitator is desorbed, soil is repaired with the identical method of embodiment 2, adsorbent additional amount is 1%, organic pollutant
Removal rate is 70.1%.
Claims (10)
1. a kind of organic polluted soil prosthetic device, which is characterized in that including sequentially connected exclusion device, deironing apparatus, divide
Stage arrangement, desorption apparatus, first stage precipitation tank, adsorbent equipment and second-level settling pond, the first stage precipitation tank bottom are provided with first
Sludge pipe, first sludge pipe are connected with the first filter device, the filtrate (liquid and adsorbent equipment of first filter device
Feeding inlet connection, the feeding inlet of the overflow outlet of the second-level settling pond and desorption apparatus connects, the two-stage precipitation bottom of pond
Portion is provided with the second sludge pipe, and second sludge pipe is connected with the second filter device, and the grading plant products therefrom includes
Bulk soil, soil coarse grained and fine-grained soil are respectively provided with flocculant in the first stage precipitation tank and second-level settling pond, described de-
Desorbing agent is housed in adsorption device, adsorbent is housed in the absorption adsorption device.
2. a kind of organic polluted soil prosthetic device according to claim 1, which is characterized in that the grain of the bulk soil
Diameter>3mm, the partial size>=0.5mm and≤3mm of the soil coarse grained, partial size<0.5mm of the fine-grained soil.
3. a kind of organic polluted soil prosthetic device according to claim 1, which is characterized in that the flocculant is selected from sun
Polyacrylamide, polysulfones, aluminum sulfate, aluminium oxide, iron chloride, ferrous sulfate, carboxymethyl cellulose, polyethyleneimine or
The one or more of polyethylene oxide.
4. a kind of organic polluted soil prosthetic device according to claim 1, which is characterized in that the desorbing agent is selected from
One or more of mixture of Tween-80, DNP-10, SDS, CTAB, TX-100 and EDTA；The TX-100 and
In the mixture of EDTA, the mass ratio of TX-100 and EDTA are (3-5): 1.
5. a kind of organic polluted soil prosthetic device according to claim 1, which is characterized in that the adsorbent is selected from coke
One of charcoal, active carbon, montmorillonite or modified coke powder, the granularity of adsorbent is less than or equal to 0.5mm, adsorbent specific surface area
For 25-1000m2/g。
6. a kind of organic polluted soil prosthetic device according to claim 5, which is characterized in that the system of the modified coke powder
Standby step is: sulfuric acid or nitric acid solution of the coke powder through pH=1~5 are modified to be obtained, and the granularity of the coke powder is less than or equal to
0.5mm, coke powder and sulfuric acid or the mass volume ratio of nitric acid solution are 1kg:(100-150) ml.
7. a kind of method for carrying out organic polluted soil reparation based on prosthetic device as claimed in any one of claims 1 to 6, special
Sign is, includes the following steps:
(1) above-mentioned prosthetic device is opened, organic polluted soil is subjected to removal of impurities with except iron, wherein non-soil part is removed and contains
Iron substance subsequently enters grading plant and is classified, and isolates bulk soil, soil coarse grained and fine-grained soil；
(2) bulk soil and soil coarse grained are recycled respectively, fine-grained soil is passed through desorption apparatus, under desorbing agent effect
It is desorbed；Material after desorption is passed through first stage precipitation tank and is precipitated, and overflow obtained by first stage precipitation tank is passed through adsorbent equipment
In organic matter is adsorbed, underflow obtained by first stage precipitation tank is passed through in the first filter device, will be obtained by the first filter device
Filtrate is passed through in adsorbent equipment and adsorbs to organic matter；
(3) overflow obtained by second-level settling pond is passed through in desorption apparatus and follows by being passed into adsorbent equipment in second-level settling pond
Ring uses, and underflow obtained by second-level settling pond is passed through in the second filter device, and adsorbent obtained by the second filter device is taken off
It is added in adsorbent equipment and is recycled after attached processing.
8. the method for organic polluted soil reparation according to claim 7, which is characterized in that the additive amount of the flocculant
For the 1wt%-5wt% of material in sedimentation basin, the additional amount of desorbing agent is the 0.02wt%- of material in desorption apparatus
0.05wt%, the additive amount of the adsorbent are the 1wt%-5wt% of material in adsorbent equipment.
9. the method for organic polluted soil reparation according to claim 7, which is characterized in that the mixing speed of desorption process
For 150-300r/min, time 30-60min.
10. the method for organic polluted soil reparation according to claim 7, which is characterized in that the stirring speed of adsorption process
Degree is 100-200r/min, time 30-60min.
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