CN105598148A - Method for repairing volatile organic matter and heavy metal chromium combined polluted soil - Google Patents
Method for repairing volatile organic matter and heavy metal chromium combined polluted soil Download PDFInfo
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- CN105598148A CN105598148A CN201610080152.6A CN201610080152A CN105598148A CN 105598148 A CN105598148 A CN 105598148A CN 201610080152 A CN201610080152 A CN 201610080152A CN 105598148 A CN105598148 A CN 105598148A
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- soil
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- organic matter
- volatile organic
- metal chromium
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- 239000002689 soil Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 37
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 28
- 239000011651 chromium Substances 0.000 title claims abstract description 28
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 19
- 239000005416 organic matter Substances 0.000 title claims abstract description 13
- 150000008282 halocarbons Chemical class 0.000 claims abstract description 26
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 19
- 230000006641 stabilisation Effects 0.000 claims abstract description 17
- 238000011105 stabilization Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000011282 treatment Methods 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 51
- 238000012545 processing Methods 0.000 claims description 20
- 229920002401 polyacrylamide Polymers 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000011109 contamination Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 9
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- 239000011790 ferrous sulphate Substances 0.000 claims description 6
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 6
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 6
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 6
- 238000002386 leaching Methods 0.000 claims description 6
- 230000001351 cycling effect Effects 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 230000006872 improvement Effects 0.000 claims description 4
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 3
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 3
- 101100181929 Caenorhabditis elegans lin-3 gene Proteins 0.000 claims description 2
- 238000003900 soil pollution Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 2
- 238000011418 maintenance treatment Methods 0.000 abstract 1
- 229940052308 general anesthetics halogenated hydrocarbons Drugs 0.000 description 17
- 239000000203 mixture Substances 0.000 description 8
- 238000005406 washing Methods 0.000 description 6
- 238000010828 elution Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- -1 trichloro-ethylene, tetrachloro-ethylene, 1,2-dichloroethanes Chemical class 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 108700005239 3-Hydroxyacyl-CoA Dehydrogenase Deficiency Proteins 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- 206010028400 Mutagenic effect Diseases 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- RDVQTQJAUFDLFA-UHFFFAOYSA-N cadmium Chemical compound [Cd][Cd][Cd][Cd][Cd][Cd][Cd][Cd][Cd] RDVQTQJAUFDLFA-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 229950005499 carbon tetrachloride Drugs 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 229960001701 chloroform Drugs 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000005826 halohydrocarbons Chemical class 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 231100000243 mutagenic effect Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 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
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a method for repairing volatile organic matter and heavy metal chromium combined polluted soil and belongs to the technical field of soil pollution repairing. The method comprises the following steps: firstly, carrying out vacuum hot separation to remove volatile organic matter, namely halogenated hydrocarbon, in the soil; then sequentially eluting by a chemical eluting agent and carrying out reducing agent treatment and stabilization treatment to carry out heavy metal chromium separation and stabilization; and finally, carrying out improved maintenance treatment on the soil to obtain repaired clean soil. With the adoption of the method, the repairing of the volatile halogenated hydrocarbon and heavy metal chromium combined polluted soil is realized; and a technical process is simple and efficient and no secondary pollution is caused.
Description
Technical field:
The present invention relates to a kind of soil pollution recovery technique field, be specifically related to a kind of volatile organic matter and a huge sum of moneyBelong to the method that chromium combined pollution is repaired.
Technical background:
Organic pollution of soil becomes the focal issue of public concern gradually.
Volatile organic matter---contaminated with halogenated hydrocarbons makes us abhoring because toxic is strong. Wherein volatility halogenFor hydrocarbon (chloroform, carbon tetrachloride, trichloro-ethylene, tetrachloro-ethylene, 1,2-dichloroethanes etc.) polluted underground waterSituation is the most common. Halogen is strong toxicity base, and halogenated hydrocarbons is generally large than the toxicity of parent hydro carbons. Many research tablesBright, after halogenated hydrocarbons enters in animal body, mammal and the mankind are had to carcinogenic, teratogenesis, mutagenic effect.Halogenated hydrocarbons, after skin absorbs, is invaded nerve center or acts on internal organs, causes poisoning. Soil is seriously dirtyDye and can cause some composition of halogenated hydrocarbons to accumulate in food, and by food chain harm humans health.
Chromium and chromic salts, as the important raw material of industry, are mainly used in the industries such as chemical industry, metallurgy, process hides, plating,In the construction of national economy, play an important role, these industrial department distributed points are many and wide, and discharge large every dayAmount chromate waste water and waste gas, therefore the chromium of contaminated soil environment mainly comes from containing the discharge of chromium metal industry department" three wastes ".
In soil, volatile organic contaminant-heavy-metal composite pollution is very general at present, the dirt of sewage treatment plantMud, industrial wastewater waste residue are toppled over and are caused a large amount of soil combined pollutions, the dirt of the enterprises such as oil, chemical industry, cokingDye place, pollutant is taking organic solvent class halogenated hydrocarbons as representative, be also often compounded with heavy metal chromium, arsenic, lead, cadmium,Deng other pollutants. Comparatively typical combined pollution is Volatile Organohalides-chromium soil combined pollution.
At present mainly contain reducing process (CN101053689), ozone for the improvement method of organic pollution of soilOxidizing process (CN102513345A), animals and plants repairing method (CN104438298A), vacuumizing method(CN203875107U), elution method (CN104307860A), solidification method (CN103881727), heat take offAttached method (CN103506378A), microwave method (CN103551373A). Although these methods can be in certain journeyOn degree, organic material contaminated soil is repaired, but all had deficiency separately. Development goes out a series of heavyMetal technology of repairing chromium contaminated soil, as immobilization/stabilisation, elution method, wash local method, electrodynamics reparationMethod, chemical reduction method, phytoremediation, microorganism are repaired. But totally exist remediation efficiency low, remove thoroughly,The problems such as long processing period, processing cost height.
Therefore, we are necessary to learn from other's strong points to offset one's weaknesses from existing the whole bag of tricks, invent a kind of low cost, high efficiencyAnd repair polluted composite soil repairing method thoroughly.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of volatile organic matter and heavy metal chromium are providedThe method that combined contamination soil is repaired.
The method that a kind of volatile organic matter of the present invention and heavy metal chromium combined contamination soil are repaired, under concrete employingStating step realizes:
(1), Vacuum Heat separates: the soil that pollutes plot is dug out, be processed into 1～15mm's by disintegrating machineSoil particle; Then soil particle is put into airtight reactor, vacuumized and keep the pressure of reactor to existBelow 20kpa, by external heat, temperature of reactor is controlled between 150～180 DEG C to the processing time10～30min, carries out Vacuum Heat and separates the Volatile Organohalides of removing in soil;
(2), chemical leaching: the polyacrylamide of solid state powder shape is added and prepared according to the ratio of 10g/LIn 3% dilute acetic acid solution, be configured to the mixed aqueous solution of acetic acid and polyacrylamide; Will in the ratio of 1L/kgSoil after the acetic acid configuring separates Vacuum Heat with the mixed aqueous solution of polyacrylamide carries out cycling elution10min～20min; Leacheate is collected and is reduced processing;
(3), reducing agent processing: make reducing agent according to the quality proportioning 8:2 of sodium thiosulfate and ferrous sulfate mixedCompound, adds chemical leaching soil after treatment in the ratio of 10～20g/kg by the reducing agent configuring, and adds suitableThe water of amount, is uniformly mixed;
(4), stabilization processes: the mass fraction proportioning 1:1 according to shitosan, sodium lignin sulfonate, calcium oxide:8 make stabilization agent, add reducing agent after treatment the stabilization agent configuring in the ratio of 20～30g/kgSoil, adds appropriate water, is uniformly mixed;
(5), improvement maintenance processing: in the ratio of 50g/kg, plant ash is added to the soil after stabilization processes,Maintenance 0.5～2 day, obtains the soil after repairing.
The method that the present invention---a kind of volatile organic matter and heavy metal chromium combined contamination soil are repaired, with reference to " soilEarth environmental quality standards " (GB15618-1995), adopt single-factor pollution index evaluation assessment, compound to severeContaminated soil carries out deep treatment and improvement.
With respect to prior art, beneficial effect of the present invention is:
1, the method that volatile organic matter halogenated hydrocarbons adopts Vacuum Heat to separate efficiently removes from soil, due to veryIdling is pressed, and because external heat is in the condition of high temperature, halogenated hydrocarbons in soil is very easily separated out and enter gaseous stateAnd reach the object removing, and greatly shorten the processing time, improve removal efficiency;
2, adopt the mixed aqueous solution of acetic acid and polyacrylamide as leacheate, can make the heavy metal in soilChromium fully washes out and enters solution, can remove more than 70% heavy metal chromium; Acetic acid in leacheate promotes heavy metalForm change to exchangeable species, thereby be conducive to washing out of chromium; Polyacrylamide is high molecular polymer, hasGood water-soluble, nontoxic, non-corrosiveness, can improve the physical property of soil, increase soil macro aggregateNumber, improves soil hydraulic and water content, slows down soil losses, can allow soil fully contact with leacheate;In addition, polyacrylamide has carboxyl and amide groups isoreactivity group, can by with the metal on soil particle surfaceIon forms coordinate bond, has the synergy that makes to stablize chromium ion;
3, reducing agent is the mixture of sodium thiosulfate and ferrous sulfate, and reducing property is high, and main purpose is by sexavalenceChromium is reduced to trivalent chromium, and the composition of two kinds of reducing agents is with respect to single reducing agent, and reduction dosage reduces and effectBetter, illustrate that both compositions have synergy. Both are all soluble in water, low price.
4, stabilizing agent is the composition of shitosan, sodium lignin sulfonate, calcium oxide. Shitosan is that nature exists onlyOne alkaline polysaccharide, it has amido and very easily forms quaternary ammonium compound cation, the amino and hydroxyl adjacent with amino in its moleculeBase and heavy metal chromium can form stable chelate, have good removal effect; Calcium oxide regulates P in soil H value, willPH value is promoted to more than 5.5, can make trivalent chromium form precipitation state; Sodium lignin sulfonate is a kind of natural polymer polymerizationThing, has very strong dispersibility, is suitable for solid to be dispersed in aqueous medium, can be adsorbed on the table of various solid particlesOn face, can carry out metal ion exchanged effect; Adding of sodium lignin sulfonate, promote to greatest extent shitosan at soilDispersion in earth, self also has the chelation with heavy metal ion simultaneously; Three kinds of components of stabilizing agent are given full play toEffect, reduces the leaching rate of heavy metal chromium in soil greatly.
By enforcement of the present invention, chromium content exceedes 800mg/kg, Volatile Organohalides content exceedes 60mg/kgSevere combined contamination soil, soil after treatment reaches total chromium concn lower than 60mg/kg, volatility haloHydrocarbon content is lower than 0.5mg/kg. Meet " standard of soil environment quality " (GB15618-1995) secondary standard,Economic benefit and environmental benefit are good.
Brief description of the drawings
Fig. 1 is the process chart of a kind of method of volatile organic matter and the reparation of heavy metal chromium combined pollution
Detailed description of the invention:
Embodiment 1: get 10kg halogenated hydrocarbons and chromium combined contamination soil, carry out pH value, halogenated hydrocarbons content and totalChromium content detection; The soil that pollutes plot is dug out, be processed into the soil particle of 1-15mm by disintegrating machine;Then soil particle is put into airtight reactor, vacuumized and keep the pressure of reactor at 20kpa, pass throughTemperature of reactor is controlled at 160 DEG C by external heat, and processing time 20min carries out Vacuum Heat and separates removal soilIn Volatile Organohalides; Then according to the ratio of 10g/L, the polyacrylamide of solid state powder shape is added and prepared3% dilute acetic acid solution in, be configured to the mixed aqueous solution of acetic acid and polyacrylamide; Vacuum Heat is separatedAfter soil put into drip washing container, add while stirring the mixing of acetic acid and polyacrylamide with the amount of 1L/kgThe aqueous solution, to soil, carries out cycling elution 10min; Leacheate is collected and is reduced processing; According to sulfo-sulphurThe quality proportioning 8:2 of acid sodium and ferrous sulfate makes reducing agent mixture, is added chemistry to drench with the amount of 10g/kgSoil after washing, adds appropriate water that it is fully uniformly mixed; According to shitosan, sodium lignin sulfonate, calcium oxideMass fraction proportioning 1:1:8 make stabilization agent, added after reducing agent mixed processing with the amount of 20g/kgSoil, add appropriate water that it is fully uniformly mixed; Plant ash is added to the soil after stabilization processes, withThe amount of 50g/kg adds, and maintenance 2 days obtains the soil after repairing; The halogenated hydrocarbons detecting in pH value, soil containsAmount and total chrome content, test data is in table 1.
Embodiment 2: get 10kg halogenated hydrocarbons and chromium combined contamination soil, carry out pH value, halogenated hydrocarbons content and totalChromium content detection; The soil that pollutes plot is dug out, be processed into the soil particle of 1-15mm by disintegrating machine;Then soil particle is put into airtight reactor, vacuumized and keep the pressure of reactor at 20kpa, pass throughTemperature of reactor is controlled at 180 DEG C by external heat, and processing time 30min carries out Vacuum Heat and separates removal soilIn Volatile Organohalides; Then according to 10g/L ratio, the polyacrylamide of solid state powder shape is added and preparedIn 3% dilute acetic acid solution, be configured to the mixed aqueous solution of acetic acid and polyacrylamide; After Vacuum Heat is separatedSoil put into drip washing container, add while stirring the mixing water of acetic acid and polyacrylamide with the amount of 1L/kgSolution, to soil, carries out cycling elution 20min; Leacheate is collected and is reduced processing; According to thiosulfuric acidThe quality proportioning 8:2 of sodium and ferrous sulfate makes reducing agent mixture, is added chemical leaching with the amount of 20g/kgAfter soil, add appropriate water that it is fully uniformly mixed; According to shitosan, sodium lignin sulfonate, calcium oxideMass fraction proportioning 1:1:8 makes stabilization agent, is added after reducing agent mixed processing with the amount of 30g/kgSoil, adds appropriate water that it is fully uniformly mixed; Plant ash is added to the soil after stabilization processes, with 50g/kgAmount add, maintenance 2 days, obtain repair after soil; Halogenated hydrocarbons content in detection pH value, soil and totalChromium content, test data is in table 1.
Embodiment 3: get 10kg halogenated hydrocarbons and chromium combined contamination soil, carry out pH value, halogenated hydrocarbons content and totalChromium content detection; The soil that pollutes plot is dug out, be processed into the soil particle of 1-15mm by disintegrating machine;Then soil particle is put into airtight reactor, vacuumized and keep the pressure of reactor at 20kpa, pass throughTemperature of reactor is controlled at 160 DEG C by external heat, and processing time 10min carries out Vacuum Heat and separates removal soilVolatile Organohalides in earth; Then according to the ratio of 10g/L, the polyacrylamide of solid state powder shape is added and joinedIn good 3% dilute acetic acid solution, be configured to the mixed aqueous solution of acetic acid and polyacrylamide; Vacuum Heat is dividedFrom after soil put into drip washing container, add the mixed of acetic acid and polyacrylamide with the amount of 1L/kg while stirringHeshui solution, to soil, carries out cycling elution 20min; Leacheate is collected and is reduced processing; According to sulfo-The quality proportioning 8:2 of sodium sulphate and ferrous sulfate makes reducing agent mixture, is added chemistry with the amount of 15g/kgSoil after drip washing, adds appropriate water that it is fully uniformly mixed; According to shitosan, sodium lignin sulfonate, oxidationThe mass fraction proportioning 1:1:8 of calcium makes stabilization agent, is added reducing agent mixed processing with the amount of 25g/kgAfter soil, add appropriate water that it is fully uniformly mixed; Plant ash is added to the soil after stabilization processes, withThe amount of 50g/kg adds, and maintenance 2 days obtains the soil after repairing; The halogenated hydrocarbons detecting in pH value, soil containsAmount and total chrome content, test data is in table 1.
Table 1
Claims (2)
1. the method that volatile organic matter and heavy metal chromium combined contamination soil are repaired, is characterized in that: toolBody adopts following step to realize:
(1), Vacuum Heat separates: the soil in combined pollution plot is dug out, be processed into 1～15mm by disintegrating machineSoil particle; Then soil particle is put into airtight reactor, vacuumized and keep the pressure of reactor to existBelow 20kpa, by external heat, temperature of reactor is controlled between 150～180 DEG C to the processing time10～30min, carries out Vacuum Heat and separates the volatile organic matter halogenated hydrocarbons of removing in soil;
(2), chemical leaching: the polyacrylamide of solid state powder shape is added and prepared according to the ratio of 10g/LIn 3% dilute acetic acid solution, be configured to the mixed aqueous solution of acetic acid and polyacrylamide; Will in the ratio of 1L/kgSoil after the acetic acid configuring separates Vacuum Heat with the mixed aqueous solution of polyacrylamide carries out cycling elution10min～20min; Leacheate is collected and is reduced processing;
(3), reducing agent processing: make reducing agent according to the quality proportioning 8:2 of sodium thiosulfate and ferrous sulfate mixedCompound, adds chemical leaching soil after treatment in the ratio of 10～20g/kg by the reducing agent configuring, and adds suitableThe water of amount, is uniformly mixed;
(4), stabilization processes: the mass fraction proportioning 1:1 according to shitosan, sodium lignin sulfonate, calcium oxide:8 make stabilization agent, add reducing agent after treatment the stabilization agent configuring in the ratio of 20～30g/kgSoil, adds appropriate water, is uniformly mixed;
(5), improvement maintenance processing: in the ratio of 50g/kg, plant ash is added to the soil after stabilization processes,Maintenance 0.5～2 day, obtains the soil after repairing.
2. a kind of volatile organic matter according to claim 1 and heavy metal chromium combined contamination soil are repairedMethod, is characterized in that: in described combined contamination soil, chromium content >=800mg/kg, Volatile Organohalides containAmount >=60mg/kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610080152.6A CN105598148B (en) | 2016-02-04 | 2016-02-04 | A kind of method of volatile organic matter and heavy metal chromium combined contamination soil reparation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610080152.6A CN105598148B (en) | 2016-02-04 | 2016-02-04 | A kind of method of volatile organic matter and heavy metal chromium combined contamination soil reparation |
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| Publication Number | Publication Date |
|---|---|
| CN105598148A true CN105598148A (en) | 2016-05-25 |
| CN105598148B CN105598148B (en) | 2018-09-18 |
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| CN106040731A (en) * | 2016-08-16 | 2016-10-26 | 南京格洛特环境工程股份有限公司 | Organic pollution soil restoration method |
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| CN106216368B (en) * | 2016-07-29 | 2019-10-01 | 中国科学院青岛生物能源与过程研究所 | One kind containing Cr6+Contaminated soil processing unit and its method |
| CN106216368A (en) * | 2016-07-29 | 2016-12-14 | 中国科学院青岛生物能源与过程研究所 | A kind of containing Cr6+contaminated soil processing means and method thereof |
| CN106040731A (en) * | 2016-08-16 | 2016-10-26 | 南京格洛特环境工程股份有限公司 | Organic pollution soil restoration method |
| CN106238449A (en) * | 2016-08-30 | 2016-12-21 | 樊之雄 | A kind of restorative procedure of heavy-metal contaminated soil |
| CN107030103A (en) * | 2017-03-27 | 2017-08-11 | 大连理工大学 | The method that a kind of utilization sub-micron ferriferous oxide and sludge lysate repair organic heavy metal combined contamination soil |
| CN107282617A (en) * | 2017-06-05 | 2017-10-24 | 浙江省环境工程有限公司 | Polycyclic aromatic hydrocarbon heavy-metal contaminated soil restorative procedure |
| CN107824608A (en) * | 2017-12-13 | 2018-03-23 | 长沙汇聚环境技术有限公司 | A kind of method and device of Volatile Organohalides and chromium combined contamination soil reparation |
| CN108723071A (en) * | 2018-05-22 | 2018-11-02 | 河北省冀信环保科技有限公司 | One kind harmless treatment device containing chromium soil and processing method |
| CN108672489A (en) * | 2018-06-08 | 2018-10-19 | 南京林业大学 | A kind of carbonization restorative procedure of volatile organic matter-heavy-metal composite pollution soil |
| CN108787726A (en) * | 2018-08-29 | 2018-11-13 | 北京高能时代环境技术股份有限公司 | A kind of technique that chemical leaching and electronation repairing polluted soil is used in combination |
| CN109513736A (en) * | 2018-12-05 | 2019-03-26 | 上海万帝环境技术有限公司 | Contaminated soil remediation method and prosthetic device |
| CN109991323A (en) * | 2018-12-29 | 2019-07-09 | 江苏微谱检测技术有限公司 | The detection method of VOCs in ambient air |
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| CN110064651A (en) * | 2019-05-06 | 2019-07-30 | 西施生态科技股份有限公司 | A kind of inorganic, organic co-contaminated soil processing method |
| CN110076185A (en) * | 2019-05-10 | 2019-08-02 | 生态环境部南京环境科学研究所 | A kind of method of remediating heavy metal and polycyclic aromatic hydrocarbon composite pollution soil |
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| CN112122334A (en) * | 2020-09-08 | 2020-12-25 | 浙江省冶金研究院有限公司 | Method for repairing organic-heavy metal combined contaminated soil by coupling chemical oxidation with biochar and strengthening microorganisms |
| CN112552924A (en) * | 2020-12-10 | 2021-03-26 | 安徽省农业科学院土壤肥料研究所 | Nano zero-valent iron soil conditioner and preparation method and application thereof |
| CN112958606A (en) * | 2021-02-03 | 2021-06-15 | 中环国投(重庆)环保产业开发有限公司 | Remediation method for organic contaminated soil |
| CN114226435A (en) * | 2021-11-29 | 2022-03-25 | 中山大学 | Remediation method of heavy metal-organic matter composite contaminated soil |
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