CN109772870A - The regulation method of polluted soil - Google Patents
The regulation method of polluted soil Download PDFInfo
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- CN109772870A CN109772870A CN201711224966.3A CN201711224966A CN109772870A CN 109772870 A CN109772870 A CN 109772870A CN 201711224966 A CN201711224966 A CN 201711224966A CN 109772870 A CN109772870 A CN 109772870A
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- vegetable oil
- oil
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- polluted soil
- biphenyl
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- 239000002689 soil Substances 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 51
- 235000015112 vegetable and seed oil Nutrition 0.000 claims abstract description 87
- 239000008158 vegetable oil Substances 0.000 claims abstract description 87
- 239000003549 soybean oil Substances 0.000 claims abstract description 23
- 235000012424 soybean oil Nutrition 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 235000019482 Palm oil Nutrition 0.000 claims abstract description 4
- 235000019486 Sunflower oil Nutrition 0.000 claims abstract description 4
- 239000003240 coconut oil Substances 0.000 claims abstract description 4
- 235000019864 coconut oil Nutrition 0.000 claims abstract description 4
- 239000002385 cottonseed oil Substances 0.000 claims abstract description 4
- 235000012343 cottonseed oil Nutrition 0.000 claims abstract description 4
- 239000008169 grapeseed oil Substances 0.000 claims abstract description 4
- 239000004006 olive oil Substances 0.000 claims abstract description 4
- 235000008390 olive oil Nutrition 0.000 claims abstract description 4
- 239000002540 palm oil Substances 0.000 claims abstract description 4
- 239000002600 sunflower oil Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 35
- 229910052799 carbon Inorganic materials 0.000 claims description 25
- 239000003921 oil Substances 0.000 claims description 12
- 235000019198 oils Nutrition 0.000 claims description 12
- 239000004094 surface-active agent Substances 0.000 claims description 11
- 231100000770 Toxic Equivalency Factor Toxicity 0.000 claims description 7
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 claims description 7
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 claims description 6
- 235000020661 alpha-linolenic acid Nutrition 0.000 claims description 6
- 229960004488 linolenic acid Drugs 0.000 claims description 6
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- INIINMCHQPDVOK-UHFFFAOYSA-N O1C=CC=C1.C1(=CC=CC=C1)C1=CC=CC=C1.[Cl] Chemical class O1C=CC=C1.C1(=CC=CC=C1)C1=CC=CC=C1.[Cl] INIINMCHQPDVOK-UHFFFAOYSA-N 0.000 claims description 3
- -1 chlorine biphenyl dioxins Chemical class 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 241000196324 Embryophyta Species 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- VKOBVWXKNCXXDE-UHFFFAOYSA-N icosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCC(O)=O VKOBVWXKNCXXDE-UHFFFAOYSA-N 0.000 claims 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims 1
- 235000017060 Arachis glabrata Nutrition 0.000 claims 1
- 244000105624 Arachis hypogaea Species 0.000 claims 1
- 235000010777 Arachis hypogaea Nutrition 0.000 claims 1
- 235000018262 Arachis monticola Nutrition 0.000 claims 1
- SMDSYYDAICEBIB-UHFFFAOYSA-N O1C=COC=C1.C1=CC=CC=C1C1=CC=CC=C1 Chemical compound O1C=COC=C1.C1=CC=CC=C1C1=CC=CC=C1 SMDSYYDAICEBIB-UHFFFAOYSA-N 0.000 claims 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims 1
- 239000005642 Oleic acid Substances 0.000 claims 1
- 125000005313 fatty acid group Chemical group 0.000 claims 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims 1
- 235000020232 peanut Nutrition 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 4
- 235000019483 Peanut oil Nutrition 0.000 abstract description 2
- 239000000312 peanut oil Substances 0.000 abstract description 2
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 15
- 238000000605 extraction Methods 0.000 description 15
- 239000000203 mixture Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000003344 environmental pollutant Substances 0.000 description 10
- 231100000719 pollutant Toxicity 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 235000014113 dietary fatty acids Nutrition 0.000 description 7
- 229930195729 fatty acid Natural products 0.000 description 7
- 239000000194 fatty acid Substances 0.000 description 7
- 150000004665 fatty acids Chemical class 0.000 description 7
- 239000005416 organic matter Substances 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
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- 238000005119 centrifugation Methods 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 230000001376 precipitating effect Effects 0.000 description 3
- YZAZXIUFBCPZGB-QZOPMXJLSA-N (z)-octadec-9-enoic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O.CCCCCCCC\C=C/CCCCCCCC(O)=O YZAZXIUFBCPZGB-QZOPMXJLSA-N 0.000 description 2
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 244000068988 Glycine max Species 0.000 description 2
- 235000010469 Glycine max Nutrition 0.000 description 2
- 235000021314 Palmitic acid Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- 239000003995 emulsifying agent Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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- VZCCETWTMQHEPK-UHFFFAOYSA-N gamma-Linolensaeure Natural products CCCCCC=CCC=CCC=CCCCCC(O)=O VZCCETWTMQHEPK-UHFFFAOYSA-N 0.000 description 2
- VZCCETWTMQHEPK-QNEBEIHSSA-N gamma-linolenic acid Chemical compound CCCCC\C=C/C\C=C/C\C=C/CCCCC(O)=O VZCCETWTMQHEPK-QNEBEIHSSA-N 0.000 description 2
- 235000020664 gamma-linolenic acid Nutrition 0.000 description 2
- 229960002733 gamolenic acid Drugs 0.000 description 2
- NHXTZGXYQYMODD-UHFFFAOYSA-N icosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCC(O)=O.CCCCCCCCCCCCCCCCCCCC(O)=O NHXTZGXYQYMODD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- DCXXMTOCNZCJGO-UHFFFAOYSA-N tristearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 description 2
- FOIBFBMSLDGNHL-UHFFFAOYSA-N 1,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin Chemical compound ClC1=C(Cl)C(Cl)=C2OC3=C(Cl)C(Cl)=C(Cl)C(Cl)=C3OC2=C1Cl FOIBFBMSLDGNHL-UHFFFAOYSA-N 0.000 description 1
- RHIROFAGUQOFLU-UHFFFAOYSA-N 1,2,3,4,6,7,8,9-Octachlorodibenzofuran Chemical compound ClC1=C(Cl)C(Cl)=C2C3=C(Cl)C(Cl)=C(Cl)C(Cl)=C3OC2=C1Cl RHIROFAGUQOFLU-UHFFFAOYSA-N 0.000 description 1
- LGIRBUBHIWTVCK-UHFFFAOYSA-N 1,2,3,7,8,9-Hexachlorodibenzodioxin Chemical compound O1C2=CC(Cl)=C(Cl)C(Cl)=C2OC2=C1C=C(Cl)C(Cl)=C2Cl LGIRBUBHIWTVCK-UHFFFAOYSA-N 0.000 description 1
- OGBQILNBLMPPDP-UHFFFAOYSA-N 2,3,4,7,8-Pentachlorodibenzofuran Chemical compound O1C2=C(Cl)C(Cl)=C(Cl)C=C2C2=C1C=C(Cl)C(Cl)=C2 OGBQILNBLMPPDP-UHFFFAOYSA-N 0.000 description 1
- KSMVNVHUTQZITP-UHFFFAOYSA-N 2,3,7,8-Tetrachlorodibenzofuran Chemical compound O1C2=CC(Cl)=C(Cl)C=C2C2=C1C=C(Cl)C(Cl)=C2 KSMVNVHUTQZITP-UHFFFAOYSA-N 0.000 description 1
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 206010015856 Extrasystoles Diseases 0.000 description 1
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- 239000003570 air Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- MDLHEADEPQXWHI-UHFFFAOYSA-N benzene;furan Chemical class C=1C=COC=1.C1=CC=CC=C1 MDLHEADEPQXWHI-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
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- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 1
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- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- YXVJNOXXPKIWIM-UHFFFAOYSA-N n-(2-hydroxyethyl)-n-(2-hydroxypropyl)nitrous amide Chemical compound CC(O)CN(N=O)CCO YXVJNOXXPKIWIM-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- RQFLGKYCYMMRMC-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O.CCCCCCCCCCCCCCCCCC(O)=O RQFLGKYCYMMRMC-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
A kind of regulation method of polluted soil, it include: that (a) with the weight ratio of 1:1 to 1:4 mixes the polluted soil and vegetable oil, to extract chlorinated organics into the vegetable oil from the polluted soil, wherein, the vegetable oil is at least one or its mixing selected from soybean oil, peanut oil, coconut oil, olive oil, grape seed oil, cotton seed oil, sunflower oil, palm oil and (b) separates the polluted soil and the vegetable oil, and the chlorinated organics simultaneously recycling and reusing vegetable oil can be removed whereby.
Description
Technical field
The present invention relates to a kind of regulation methods of contaminated soil, and in particular to removes high concentration in a kind of automatic pollution soil and contains
The method of chlorine organic.
Background technique
Chlorinated organics are widely used in intermediate, solvent and pesticide of synthetic etc..Solvent emanation and its product
Waste often enters in surrounding medium such as ocean, soil, causes environmental pollution.Chlorinated organics are quite steady at normal temperatures and pressures
Fixed, solubility is low in water and Henry's constant is small, is easily adsorbed in solid dielectric such as soil.Common chlorinated organics are containing chlorine fragrance
Race's organic matter and Dioxins compound.
In the soil, chlorinated organics are difficult to remove or recycle, because solubility is low in water for its hydrophobic property, cause easily with
Organic substance in soil media adsorbs mutually, becomes persistence organic pollutant.In addition, the octanol of hydrophobic organic compound distributes
Coefficient is high, causes to be easy to accumulate in animal tallow by food chain, causes tumour, damage health.
For the processing method of chlorinated organics, traditionally there are WATER-WASHING METHOD, solvent extraction, electrochemical process and heat treatment
Method, and at present mostly with the hydrophobic organic compound in surfactant (also referred to as emulsifier) sorption extraction soil organism, utilize table
Face activating agent has the characteristic of hydrophilic group and lipophilic group, reduces the surface tension of organic phase and water phase, increases organic matter in soil
The desorption ability on surface, so that organic matter is dispersed in surfactant.The surfactant can be subdivided into cation, yin from
Sub and non-ionic surfactant, and surfactant mix and match then can be reinforced into desorption effect because of synergistic effect.
However, being still restricted using pollutant in surfactant extraction soil phase, generally because the surfactant extracts
Pollutant must be limited to hydrophobicity and non-volatile.In addition, the by-products such as foam and lotion can be generated in extraction process, make
At the impact of ecological environment.Furthermore when soil permeability is too low, surfactant will without extraction effectiveness, and it is easy to attach in
Soil, and there is recycling difficulty and be difficult to the shortcomings that decomposing, cause the secondary pollution of soil.Therefore it provides effectively regulation is dirty
Soil is contaminated, chlorinated organics in soil, method that is non-hazardous to environment and meeting economic benefit actually current important issue are extracted.
Summary of the invention
The present invention provides a kind of regulation method of polluted soil, and the chlorinated organics simultaneously recycling and reusing plant can be removed
Object oil.
The regulation method of polluted soil provided by the present invention includes:
(a) in the environment of surfactant is not present, with the weight ratio of 1:1 to 1:4 mix the polluted soil with
Vegetable oil, to extract chlorinated organics into the vegetable oil from the polluted soil, wherein the vegetable oil is selected from soybean oil, flower
At least one or its mixing of oil generation, coconut oil, olive oil, grape seed oil, cotton seed oil, sunflower oil, palm oil；And
(b) polluted soil and the vegetable oil are separated.
In a specific embodiment, the regulation method of polluted soil provided by the present invention, further includes:
(c) the separated vegetable oil and active carbon are mixed；
(d) active carbon through mixing is precipitated；And
(e) vegetable oil and active carbon through mixing are separated, to recycle the vegetable oil.
According to the method for the present invention, using the chlorinated organics in vegetable oil extraction soil phase, can be had according to polar character
Effect removal pollutant, and vegetable oil is the solvent friendly to environment, has non-toxic, cheap and reusable excellent
Point.If being based on the easy decomposing organic matter characteristic of microorganism in addition, vegetable oil remains in soil after extraction process, can be used as battalion
The source of supporting promotes microorganism growth, avoids the secondary pollution of soil.
Detailed description of the invention
The regulation method of the polluted soil of Fig. 1 to illustrate the invention；And
The regulation method of Fig. 2 polluted soil of another specific embodiment to illustrate the invention；And
The regulation mode of Fig. 3 polluted soil of another specific embodiment to illustrate the invention.
Symbol description
S1~S5: step
S2-1~S2-2: step.
Specific embodiment
Illustrate embodiments of the present invention below by way of particular specific embodiment, those of ordinary skill in the art can be by this
Specification disclosure of that understands advantages of the present invention and effect easily.The present invention can also pass through other different embodiment party
Formula is implemented or is applied, and the various details in this specification may be based on different viewpoints and application, is not departing from institute of the present invention
Different modification and change are assigned under disclosed design.In addition, all ranges and value all include and annexable herein.Fall in this
Any numerical value or point in range described in text, such as any integer all can serve as minimum value or maximum value to export bottom
Range etc..
Vegetable oil is the small and not compatible with water lightweight nonaqueous phase liquid (LNAPL) of density ratio water, because of the nonpolarity of oils
Characteristic is bonded chlorinated organics easily mutually with it.Furthermore vegetable oil can form film on soil particle surface, be conducive to contain chlorine
Organic matter is desorbed from soil micropore.In addition, vegetable oil is that non-toxic solvent can if remaining in soil in extraction process
As microbe carbon source and the source of energy, promotes soil to show geomicrobes growth, further decrease chlorinated organics in soil
Concentration.Therefore, the present invention is to extract chlorinated organics in soil using vegetable oil to reach whereby as one ring of environmental renovation system
The effect of at protection environmental ecology.
In specific implementation, referring to Fig. 1, the specific reality of the regulation method of its polluted soil provided to illustrate the invention
Apply mode, comprising: step S1 mixes this with the weight ratio of 1:1 to 1:4 and get dirty in the environment of surfactant is not present
Contaminate soil and vegetable oil, with from polluted soil extraction chlorinated organics into the vegetable oil, wherein the vegetable oil be selected from
At least one or its of soybean oil, peanut oil, coconut oil, olive oil, grape seed oil, cotton seed oil, sunflower oil, palm oil are mixed
It closes；And then step S2, separate the polluted soil and the vegetable oil.
In another specific embodiment, the regulation method of polluted soil of the present invention further includes repeating step S1 and S2 to 5
It is secondary, to promote the extraction quantity of chlorinated organics.It is, mixing the soil through renovating with vegetable oil again, to get dirty from this
Soil extraction chlorinated organics are contaminated into the vegetable oil.
In a specific embodiment, which is by chlorinated organics contaminated soil.The chlorine-containing organic closes
Object be include dioxin homologue or class dioxin homologue.
In a specific embodiment, which has the dioxin of 4 to 8 chlorine atoms.In a specific embodiment,
The chlorinated organics be include being worn selected from 2,3,7,8- tetrachloro biphenyl dioxin (TCDD), 1,2,3,7,8- pentachloro- biphenyl
Ao Xin (PeCDD), 1,2,3,4,7,8- heptachlor biphenyl dioxin (HxCDD), 1,2,3,6,7,8- heptachlor biphenyl wear Austria
Pungent, 1,2,3,7,8,9- heptachlor biphenyl dioxin, eight chlorine biphenyl dioxins (OCDD), 1,2,3,4,6,7,8- heptachlor bigeminy
Benzene furans (HpCDD), 2,3,7,8- tetrachloro biphenyl furans (TCDF), 1,2,3,7,8- pentachloro- biphenyl furans (PeCDF),
2,3,4,7,8- pentachloro- biphenyl furans, 1,2,3,4,7,8- chlordene biphenyl furans (HxCDF), 1,2,3,6,7,8- chlordene
Biphenyl furans, 1,2,3,4,6,7,8- chlordene biphenyl furans, 1,2,3,7,8,9- chlordene biphenyl furans, 1,2,3,4,6,
7,8- heptachlor biphenyl furans (HpCDF), 1,2,3,4,7,8,9- heptachlor biphenyl furans and eight chlorine biphenyl furans (OCDF)
At least one of formed group.
In a specific embodiment, the content of the contamination with chlorinated organics of the polluted soil is greater than 30,000ng I-
TEQ/kg.In a specific embodiment, the polluted soil of the invention be derived from petrochemical industry Anshun factory in platform south containing dioxin
Soil.
In a specific embodiment, which is dried polluted soil.In the low soil of water content,
Vegetable oil of the invention can effectively extract pollutant, without additives such as additional addition surfactant, emulsifiers.Therefore, if
Before mixing the polluted soil and vegetable oil, the water content of the polluted soil is excessively high, can first be heat-treated the contaminated soil
Earth is to remove excessive moisture, in general, the temperature of heat treatment is 100 to 120 DEG C.
In a specific embodiment, further include before mixing the polluted soil and the vegetable oil, preparatory sub-sieve this get dirty
Contaminate the particle size of soil.Be commonly used for and the partial size of the polluted soil of vegetable oil mixing be from 0.02 to 2mm, with
Coming into full contact with and colliding conducive to the vegetable oil and the polluted soil, to promote effect of extracting.
In a specific embodiment, it is greater than the masonry of 2mm, then with rubbing implement Sieving and casing with the sieve of such as hydrocyclone
The sand soil of stone/sand machine, sieve mud machine respectively by partial size between 0.075 to 20mm and 0.02 to 0.075mm sifts out.In addition, for drop
The water content of the low polluted soil, the processing before mixing may also include and are compacted the polluted soil, make its preliminary hydro-extraction,
It finally reheats and dries the polluted soil, in general, the heat treatment temperature of heating, drying is 100 to 120 DEG C.
In a specific embodiment, in terms of the weight percent of the vegetable oil, the main packet of fatty acid composition of the vegetable oil
Include 52 to 65% linolenic acid (linoleic oil).
In a specific embodiment, in terms of the weight percent of the vegetable oil, the fatty acid composition of the vegetable oil includes
23% oleic acid (oleic acid).In a specific embodiment, the fatty acid composition of the vegetable oil includes 10% palmitinic acid
(palmitic acid).In a specific embodiment, the fatty acid composition of the vegetable oil includes 7% linolenic acid
(gamma-linolenic acid).In a specific embodiment, the fatty acid composition of the vegetable oil includes 3 to 5% tristearin
Sour (stearic acid).In a specific embodiment, the fatty acid composition of the vegetable oil includes 0.4% arachidic acid
(icosanoic acid)。
In a specific embodiment, in terms of the weight percent of the vegetable oil, the fatty acid composition of the vegetable oil includes 52
To 65% linolenic acid (linoleic oil), 23% oleic acid (oleic acid), 10% palmitinic acid (palmitic
Acid), 7% linolenic acid (gamma-linolenic acid), 3 to 5% stearic acid (stearic acid) and
0.4% arachidic acid (icosanoic acid).
In a specific embodiment, which is soybean oil, that is, the vegetable fat extracted from soybean.
In a specific embodiment, the polluted soil and the vegetable oil weight ratio are from 1:1 to 1:4 preferably 1:
1.Although the dosage of the vegetable oil is high, mixed degree is preferable, and collision opportunity between the two is just opposite to be reduced.Therefore,
The weight of the vegetable oil is preferably no more than four times of the polluted soil weight, to increase chance impinging one another.
In a specific embodiment, step (a) is mixed into using conventional method, for example, such as stir, vibrate,
The methods of rock, but be not limited to this, as long as the method that the polluted soil can be made effectively to contact with the vegetable oil.In a tool
It is to mix the polluted soil and vegetable oil with agitating mode in body embodiment, for example, is stirred using thermostatic water bath
Machine, revolving speed may be set to 60 revs/min.
In a specific embodiment, the time for mixing the polluted soil and the vegetable oil is from 4 to 8 hours.
In a specific embodiment, the temperature for mixing the polluted soil and the vegetable oil is from 25 to 60 DEG C.
From after polluted soil extraction chlorinated organics are into the vegetable oil, then separate the polluted soil and be somebody's turn to do
Vegetable oil.In a specific embodiment, to use centrifuge to separate the polluted soil and the vegetable oil, for example, centrifugation
The revolving speed of machine can be set as 6000 revs/min and be centrifugated 15 minutes.
Still another embodiment shown in Fig. 2 is please referred to, the regulation method of polluted soil of the present invention further includes separating
Before the polluted soil and the vegetable oil, that is, before step S2-2, step S2-1 is first carried out, is made mixed with the vegetable oil
The polluted soil of conjunction precipitates, and then separates the polluted soil and the vegetable oil again.For example, by such as staticly settling or
The methods of centrifugation is layered the soil and the vegetable oil.
In still another embodiment shown in Fig. 3, the regulation method of polluted soil of the present invention further include: step S3,
Mix separated vegetable oil and active carbon containing chlorinated organics；Step S4 precipitates the active carbon through mixing；And
Step S5 separates the vegetable oil and active carbon through mixing, to recycle the vegetable oil.Accordingly, absorption chlorinated organics are obtained
Active carbon and recovered vegetable oil, and the vegetable oil recoverable is in step S1.
In a specific embodiment, which can be used conventional method, for example, such as stirs, vibrates, shakes
The methods of shake, but be not limited to this, as long as the method that the active carbon can be made effectively to contact with the separated vegetable oil.
In a specific embodiment, makes the method precipitated through mixed active carbon that conventional method can be used, illustrate
For, the methods of such as staticly settling, be centrifuged separates active carbon with the vegetable oil.In a specific embodiment, to use centrifugation
Machine separates the vegetable oil and active carbon through mixing, and for example, the revolving speed of centrifuge can be set as 6000 revs/min and be centrifugated
15 minutes.
In a specific embodiment, the active carbon be porosity carbonaceous material composition, also comprising a small amount of hydrogen, nitrogen, oxygen and
Ash, and there are more micropores and high surface area characteristics.The active carbon is selected from granular, powdery, spherical, cylinder and threadiness activity
At least one of the formed group of charcoal.In addition, in a specific embodiment, the average grain diameter of the active carbon be from 0.6 to
1.5mm。
In a specific embodiment, the separated vegetable oil and activated carbon weight ratio are from 10:1 to 30:1, preferably
For 10:1.
In a specific embodiment, the time for mixing the separated vegetable oil and active carbon is from 4 to 8 hours.
In a specific embodiment, the temperature for mixing the separated vegetable oil and active carbon is from 25 to 60 DEG C.
Embodiment
1 land forming of embodiment processing
The dirty soil of dried dioxin (is derived from petrochemical industry An Shunchang in platform south, particle size range 0.02 to 2mm, water content 2.7
Weight %) with soybean oil (be purchased from Taiwan Sugar Industry Co., Ltd.) at 25 DEG C of room temperature, uniformly mixed with weight ratio 1:1,
Hybrid mode is after being mixed 8 hours using 60 revs/min of constant temperature blender (model DKW20, Deng Ying Instrument Ltd.), with centrifugation
Machine (model C N 2060, Xiang Taijing machine joint stock company limited) is divided with 6000 revs/min of rotational speed operations 15 removes the soybean containing pollutant
Oil, and again with 1:1 add soybean oil, after repeating the above steps 3 times, stand wait soil precipitating, recycle centrifuge with
6000 revs/min of rotational speed operations 15 divide, and soil and soybean oil are kept completely separate.
2 land forming of embodiment processing
The dirty soil of dried dioxin (being derived from petrochemical industry An Shunchang in platform south) (is had with soybean oil purchased from Taiwan sugar industry share
Limit company) at 40 DEG C of Yu Wendu, uniformly mixed with weight ratio 1:1, hybrid mode be using constant temperature blender (model DKW20,
Deng Ying Instrument Ltd.) 60 revs/min after mixing 8 hours, with centrifuge (model C N 2060, the limited public affairs of auspicious safe smart machine stock
Take charge of) divide soybean oil of the removal containing pollutant with 6000 revs/min of rotational speed operations 15, and soybean oil is added with 1:1 again, it repeats above-mentioned
After step 3 time, stands and wait soil precipitating, recycle centrifuge to divide with 6000 revs/min of rotational speed operations 15, by soil and soybean oil
It is kept completely separate.
3 land forming of embodiment processing
The dirty soil of dried dioxin (being derived from petrochemical industry An Shunchang in platform south) (is had with soybean oil purchased from Taiwan sugar industry share
Limit company) under temperature 60 C, uniformly mixed with weight ratio 1:1, hybrid mode be using constant temperature blender (model DKW20,
Deng Ying Instrument Ltd.) 60 revs/min after mixing 8 hours, with centrifuge (model C N 2060, the limited public affairs of auspicious safe smart machine stock
Take charge of) divide soybean oil of the removal containing pollutant with 6000 revs/min of rotational speed operations 15, and soybean oil is added with 1:1 again, it repeats above-mentioned
After step 3 time, stands and wait soil precipitating, recycle centrifuge to divide with 6000 revs/min of rotational speed operations 15, by soil and soybean oil
It is kept completely separate.
Soybean oil used in previous embodiment 1 to 3 obtains the soybean oil containing dioxin after being centrifuged, mixed back
It receives, connects and carry out aftergrowth oil step.
Embodiment 4 aftergrowth oil
By after being centrifuged of previous embodiment 1 to 3 containing dioxin soybean oil and powdered activated carbon (purchased from Japan's examination
Medicine, partial size 200x325mesh) at 25 DEG C of room temperature, it is uniformly mixed with weight ratio 10:1, utilizes constant temperature blender (model
DKW20, Deng Ying Instrument Ltd.) 60 revs/min be sufficiently mixed 4 hours after, reuse centrifuge (model C N 2060, auspicious Thailand
Jing Ji joint stock company limited) divided with 6000 revs/min of rotational speed operations 15 and separates soybean oil with powdered activated carbon, after regeneration
Vegetable oil is recycling to be used in the land forming step.
Embodiment 5 aftergrowth oil
According to the condition aftergrowth oil of embodiment 4, it is only that with the difference of embodiment 4 before being mixed with constant temperature blender
State soybean oil after being centrifuged of embodiment 1 to 3 containing dioxin and powdered activated carbon 24 hours.
Comparative example 1 carries out land forming processing using ethyl alcohol
By dioxin dirty native (being derived from middle petrochemical industry An Shunchang) and ethyl alcohol (99% industrial ethyl alcohol, purchased from city second chemical industry original
Expect Co., Ltd) under temperature 60 C, it is uniformly mixed with weight/volume ratio 1:10, hybrid mode is to be vibrated using ultrasonic
After (model BH230D, Deng Ying Instrument Ltd.) extraction time 1 hour, coextraction 5 times, dioxin concentration in soil is analyzed.
1 chlorinated organics concentration of test case
Using chlorinated organics concentration in high parsing mass spectrography (NIEA M801) the detection soil of GC/MS collocation, and calculate it
Removal rate, specific calculation is as follows, and acquired results are as shown in table 1 below:
(a) toxic equivalent concentration (ng I-TEQ/kg)=(ng/kg) x (I-TEF)
※ toxic equivalent concentration TEQ (Toxic Equivalents Quantity) to indicate soil, air, water body,
Such as the toxicity total amount of the chlorinated organics of dioxin in the media such as organism and food, chlorinated organics concentration in soil is utilized
(ng/kg) it is multiplied with international toxicity equivalence factor (I-TEF), gained unit are as follows: ng I-TEQ/kg
(b) chlorinated organics total removal rate calculating formula:
Removal rate (%)=[(CO-CX)/CO] x100%
CO is chlorinated organics initial concentration in the soil without regulation
CX is the concentration of the chlorinated organics in soil after renovating
Embodiment 1 to 3 according to the method for the present invention, compared to the comparative example 1 for using ethyl alcohol, not only have it is cheap,
The friendly advantage of environment can more effectively remove the removal rate that pollutant reaches 95% or more.
2 plant oil regeneration of test case
It is 24,667ng I- through the dioxin concentration in the soybean oil extracted containing pollutant of previous embodiment 1 to 3
TEQ/kg, after the regeneration of embodiment 4, dioxin concentration then falls to 148ng I-TEQ/kg, total removal rate 99.4%；Through reality
After applying the regeneration of example 5, total removal rate 99.6%.
According to the method for the present invention, using the chlorinated organics in vegetable oil extraction soil phase, can be had according to polar character
Effect removal pollutant reaches 95% or more removal rate, and vegetable oil is the solvent friendly to environment, has non-toxic, price low
Honest and clean and reusable advantage more utilizes using regenerating active carbon in present invention vegetable oil extracted, it is whole to return to soil
It controls in process and recycles, furthermore, vegetable oil remains in soil after extraction process, special based on the easy decomposing organic matter of microorganism
Property, then can be used as nutrient source promotes microorganism growth, and avoids the secondary pollution of soil.
Above-described embodiment is only to be illustrated, and is not intended to limit the present invention.Any those of ordinary skill in the art are equal
Can without prejudice to design of the invention and under the scope of, modifications and changes are made to the above embodiments.Therefore, right of the invention is protected
Shield range is defined by claims appended hereto, as long as not influencing effect of the invention and implementing purpose, Ying Han
It is placed in the displosure technology contents.
Claims (20)
1. a kind of regulation method of polluted soil, it is characterized in that, which includes:
(a) in the environment of surfactant is not present, the polluted soil and plant are mixed with the weight ratio of 1:1 to 1:4
Oil, to extract chlorinated organics into the vegetable oil from the polluted soil, wherein the vegetable oil is selected from soybean oil, peanut
At least one or its mixing of oil, coconut oil, olive oil, grape seed oil, cotton seed oil, sunflower oil, palm oil；And
(b) polluted soil and the vegetable oil are separated.
2. regulation method according to claim 1, it is characterized in that, which further includes repeating step (a) to (b) 1
To 5 times.
3. regulation method according to claim 1, it is characterized in that, the chlorinated organics be have 4 to 8 chlorine atoms wear Austria
It is pungent.
4. regulation method according to claim 1, it is characterized in that, which includes being selected from 2,3,7,8- tetrachloros two
Biphenyl dioxin, 1,2,3,7,8- pentachloro- biphenyl dioxin, 1,2,3,4,7,8- heptachlor biphenyl dioxin, 1,2,3,6,7,
8- heptachlor biphenyl dioxin, 1,2,3,7,8,9- heptachlor biphenyl dioxin, eight chlorine biphenyl dioxins, 1,2,3,4,6,7,
8- heptachlor biphenyl furans, 2,3,7,8- tetrachloro biphenyl furans, 1,2,3,7,8- pentachloro- biphenyl furans, 2,3,4,7,8- five
Chlorine biphenyl furans, 1,2,3,4,7,8- chlordene biphenyl furans, 1,2,3,6,7,8- chlordene biphenyl furans, 1,2,3,4,6,
7,8- chlordene biphenyl furans, 1,2,3,7,8,9- chlordene biphenyl furans, 1,2,3,4,6,7,8- heptachlor biphenyl furans, 1,
At least one of 2,3,4,7,8,9- heptachlor biphenyl furans and eight the formed groups of chlorine biphenyl furans.
5. regulation method according to claim 1, it is characterized in that, the content of the chlorinated organics of the polluted soil is greater than
3,000ng I-TEQ/kg。
6. regulation method according to claim 1, it is characterized in that, which is dry polluted soil.
7. regulation method according to claim 1, it is characterized in that, step (b) is to separate the polluted soil with centrifuge
With the vegetable oil.
8. regulation method according to claim 1, it is characterized in that, which further includes mixing the polluted soil
Before the vegetable oil, the particle size of the preparatory sub-sieve polluted soil.
9. regulation method according to claim 1, it is characterized in that, the partial size of the polluted soil is from 0.02 to 2mm.
10. regulation method according to claim 1, it is characterized in that, in terms of the weight percent of the vegetable oil, the vegetable oil
Fatty acid group become including 52 to 65% linolenic acid, 23% oleic acid, 10% palmitinic acid, 7% linolenic acid,
3 to 5% stearic acid and 0.4% arachidic acid.
11. regulation method according to claim 1, it is characterized in that, which is soybean oil.
12. regulation method according to claim 1, it is characterized in that, mix the time of the polluted soil Yu the vegetable oil
For from 4 to 8 hours.
13. regulation method according to claim 1, it is characterized in that, mix the temperature of the polluted soil Yu the vegetable oil
For from 25 to 60 DEG C.
14. regulation method according to claim 1, it is characterized in that, which further includes separating the contaminated soil
Before earth and the vegetable oil, precipitate the polluted soil mixed with the vegetable oil.
15. regulation method according to claim 1, it is characterized in that, the regulation method further include:
(c) the separated vegetable oil and active carbon are mixed；
(d) active carbon through mixing is precipitated；And
(e) vegetable oil and active carbon through mixing are separated, to recycle the vegetable oil.
16. regulation method according to claim 15, it is characterized in that, which is selected from granular, powdery, spherical, round
At least one of column and the formed group of fibrous activated carbon.
17. regulation method according to claim 15, it is characterized in that, the average grain diameter of the active carbon be from 0.6 to
1.5mm。
18. regulation method according to claim 15, it is characterized in that, the weight ratio of the separated vegetable oil and active carbon
Example is from 10:1 to 30:1.
19. regulation method according to claim 15, it is characterized in that, mix the separated vegetable oil and active carbon when
Between for from 4 to 8 hours.
20. regulation method according to claim 15, it is characterized in that, mix the temperature of the separated vegetable oil and active carbon
Degree is from 25 to 60 DEG C.
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| CN110918627A (en) * | 2019-11-15 | 2020-03-27 | 中国科学院南京土壤研究所 | Polycyclic aromatic hydrocarbon and chromium combined pollution soil synergistic leacheate in electroplating industry and application thereof |
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