CN105127190A - Method for repairing hexavalent chromium in chromium polluted soil - Google Patents
Method for repairing hexavalent chromium in chromium polluted soil Download PDFInfo
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- CN105127190A CN105127190A CN201510494866.7A CN201510494866A CN105127190A CN 105127190 A CN105127190 A CN 105127190A CN 201510494866 A CN201510494866 A CN 201510494866A CN 105127190 A CN105127190 A CN 105127190A
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- 239000002689 soil Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 63
- 239000011651 chromium Substances 0.000 title claims abstract description 51
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 26
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 title abstract description 27
- 239000007787 solid Substances 0.000 claims abstract description 21
- 239000000243 solution Substances 0.000 claims abstract description 19
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 239000011259 mixed solution Substances 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 239000012670 alkaline solution Substances 0.000 claims abstract 2
- 239000003480 eluent Substances 0.000 claims description 29
- 238000005406 washing Methods 0.000 claims description 26
- 238000001556 precipitation Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 20
- 239000007864 aqueous solution Substances 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- BEGBSFPALGFMJI-UHFFFAOYSA-N ethene;sodium Chemical group [Na].C=C BEGBSFPALGFMJI-UHFFFAOYSA-N 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 230000008439 repair process Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 6
- 239000003153 chemical reaction reagent Substances 0.000 claims description 6
- 239000013049 sediment Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000011790 ferrous sulphate Substances 0.000 claims description 5
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 5
- 238000010828 elution Methods 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 238000000498 ball milling Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000002386 leaching Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000003795 chemical substances by application Substances 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000011282 treatment Methods 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- SYZKBMPNHSQNHG-UHFFFAOYSA-N [Na].CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.NCCN Chemical compound [Na].CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.NCCN SYZKBMPNHSQNHG-UHFFFAOYSA-N 0.000 abstract 1
- FRTNIYVUDIHXPG-UHFFFAOYSA-N acetic acid;ethane-1,2-diamine Chemical compound CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.NCCN FRTNIYVUDIHXPG-UHFFFAOYSA-N 0.000 abstract 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
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- 239000003673 groundwater Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
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- 238000012502 risk assessment Methods 0.000 description 3
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- 150000003839 salts Chemical class 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940009662 edetate Drugs 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010009192 Circulatory collapse Diseases 0.000 description 1
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- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- -1 and after repairing Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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Abstract
The invention discloses a method for repairing hexavalent chromium in chromium polluted soil by adopting alkaline solution of ethylenediamine tetracetic acid salt through leaching, and belongs to the technical field of treatment of heavy metal polluted soil. The method for repairing the hexavalent chromium in the chromium polluted soil adopts 0.02-0.15 mol/L water solution of ethylenediamine tetracetic acid sodium, and adds alkali or water solution thereof for mixing to prepare alkalescent mixed solution with a pH value of 8.0-10.0; the solution serves as a leaching agent of the hexavalent chromium in the chromium polluted soil; the leaching agent is used for mixing and leaching the chromium polluted soil; the liquid-solid ratio of the leaching agent to the chromium polluted soil is 1 L: 50-450 g; the leaching temperature is 0-40 DEG C; the leaching time is 30-240 min; the solid-liquid separation is performed; the separated solid is soil, and is dried in air for direct landfill or other purposes; and the separated liquid is solution containing the hexavalent chromium. The method has the advantages of simple preparation of the leaching agent, low energy consumption and short technological flow; the removal rate of the hexavalent chromium can reach above 99%; and the influence of the hexavalent chromium on soil, underground water and surrounding environment is effectively restrained.
Description
one, technical field:the invention discloses a kind of aqueous slkali drip washing adopting edetate and repair chromic method in chromium-polluted soil, belong to the Treatment process field of heavy metal pollution of soil.
two, technical background:
According to investigations, the current chromium slag muck of China deposits total amount more than 6,000,000 tons, be scattered in more than 80 places of 20 Duo Ge provinces and cities, these chromium slags stored up are through rainwater leaching, infiltration all the year round, the manufacturing enterprise place of storing up place and chromic salts of chromium slag is also existed serious hexavalent chromium polluted, it is estimated and need the earth volume of repairing and treating more than ten million cube, need the groundwater run off administered to reach more than one hundred billion cube.Show according to scientific research, after Cr VI enters human body, a series of pathology can be caused, as liver-kidney diseases change, neuritis, oral mucosa thicken, severe poisoning circulatory failure, to lose consciousness; More serious also can cause lung cancer.Therefore the pollution of chromium slag to soil environment causes the significant damage caused health to cause the great attention of people gradually.At present, for the recovery technique of hexavalent chromium polluted soil environment, bibliographical information disclosed in existing many sections.Wherein, the high Shanxi of Peng etc. (number of patent application: 200810035563.9) with the dewatered sludge of Sewage Plant and other organic matter for raw material, adopt pyrolytic technique that the hexavalent chrome reduction in contaminated soil is become trivalent chromium, this technology needs adiabatic pyrolysis 1 hour at 800 DEG C, therefore higher to equipment requirement, and energy consumption and processing cost higher; (the number of patent application: 201210117234.5) adopt original position drip washing disposing technique, but this technology needs the hydrological geological conditions deeply grasping contaminated site, the uncertainty and risk project in process implementing is more, also easily brings secondary pollution such as Wang Xingrun; (the number of patent application: 200910241688.1) adopt two-stage countercurrent washing medicament addition stabilization group technology such as Wang Xingrun, although employing clear water is eluent, processing cost and risk reduce all greatly, but also can constantly there is brightness reversion phenomenon in the soil after disposing, it illustrates that the Cr VI in soil is disposed not thorough, also needs carry out secondary or repeatedly dispose; Xu Youze etc. adopt microorganism to carry out reduction to Cr VI in chromium-polluted soil by drip washing technique and repair (Xu Youze, Yang Zhihui, Xiang Renjun. Environmental Chemistry, 2011,30 (2): 555-560), although this technology can Cr VI more up hill and dale in rehabilitating soil, but this technology requires higher to Carbon and nitrogen sources, restricted comparatively strict to place, it is longer that technique disposes the cycle, and processing cost is higher.
three, summary of the invention:
The object of the invention is for above shortcomings in prior art, and chromic method in a kind of reparation of development chromium-polluted soil, in this reparation chromium-polluted soil, chromic method effectively can overcome the deficiencies in the prior art.Feature of the present invention is the Cr VI be effectively stripped of in contaminated soil, Cr VI after removing is through electronation-precipitation method, finally change harmless trivalent chromium sediment into, this technique effectively can contain that Cr VI is to the pollution of soil and the harmful effect to underground water and surrounding enviroment, the eluent adopted can not cause irreversible impact or secondary pollution to soil, and after repairing, soil can landfill or be separately used as him.
Technical scheme is: a kind of chromic method in reparation chromium-polluted soil, it is characterized in that: (one). the alkaline aqueous solution adopting sodium ethylene diamine tetracetate is chromic eluent in contaminated soil, the compound method of eluent is the aqueous solution with 0.02-0.15mol/L sodium ethylene diamine tetracetate, then adds alkali or the mixing of its aqueous solution is mixed with the alkalescent mixed solution that pH value is 8.0-10.0; (2). adopt above-mentioned solution as eluent chromic in chromium-polluted soil, eluent is used to carry out stirring drip washing to chromium-polluted soil, the liquid-solid ratio of eluent and chromium-polluted soil is 1L:50-450g, and the drip washing temperature of chromium-polluted soil is 0-40 DEG C, and the drip washing time is 30-240min; (3). Separation of Solid and Liquid, solid after separation is soil solid after process, can direct landfill or be separately used as him after air-dry, after separation containing Cr VI liquid, electronation-precipitation method can be adopted to make Cr VI finally change harmless trivalent chromium sediment into, the reducing agent adopted in electronation-precipitation process can adopt ferrous sulfate, and precipitating reagent adopts calcium hydroxide.
Described chromium-polluted soil mainly come from chromium slag muck deposit place or chromic salts industry legacy place containing hexavalent chromium polluted soil etc.Alkali in eluent preparation or its aqueous solution, can adopt sodium carbonate, NaOH, potassium hydroxide, calcium hydroxide, sodium acid carbonate etc. to have the chemical substance of alkalescence.The ELUTION METHOD of chromium-polluted soil preferably adopts mechanical agitation drip washing or ball milling ELUTION METHOD, and such effect is best.Solution after electronation-precipitation post processing also can be used as eluent and returns for chromium-polluted soil drip washing after dosing, can save a large amount of medicaments, decreasing pollution, reduces the cost of technology.
The invention has the advantages that:
(1) aqueous slkali of edetate is adopted from chromium-polluted soil, effectively can to remove Cr VI, Cr VI obtains with soil and is well separated, follow-up hexavalent chromium chemistry reduction-precipitation is disposed, has established good basis, substantially increased the efficiency of whole set process operation; (2) the Soil leaching agent preparation used is simple, and concentration requirement is lower, therefore, not high to equipment requirement, can adopt known device; (3) whole set process flow process is simple, and be easy to operation, energy consumption is low, and in soil, chromic clearance can reach more than 99%, and chromic residual concentration, lower than 10mg/kg, has contained the impact of Cr VI on soil, underground water and surrounding enviroment; (4) safety of soil environment after process, can backfill utilization, without follow-up handling problems; (5) the whole soil remediation process reagent cost of the inventive method is 100-250 unit/(m
3soil), operating cost is 100-350 unit/(m
3soil), processing cost reduces greatly, and can deposit place or chromic salts industry leaves over place and other various soil because of pollution of chromium by extensive treatments chromium slag muck, its economic and social benefit is very remarkable.
four, specific embodiments:
Embodiment 1: a kind of chromic method in reparation chromium-polluted soil, the aqueous solution of sodium ethylene diamine tetracetate and NaOH is adopted to be mixed with the Soil leaching agent that pH value is 10.0, the compound method of eluent is the aqueous solution with 0.02mol/L sodium ethylene diamine tetracetate, then the aqueous solution mixing adding NaOH is mixed with the alkalescent mixed solution that pH value is 10.0; Carry out mechanical agitation drip washing with above-mentioned eluent to chromium-polluted soil, the liquid-solid ratio of eluent and chromium-polluted soil is 1L:50g, and drip washing temperature is 40 DEG C, and the drip washing time is 30min; Separation of Solid and Liquid, solid after separation is for repairing rear soil, can direct landfill after air-dry, after separation containing hexavalent chromium solution, electronation-precipitation method are adopted to make Cr VI finally change harmless trivalent chromium sediment into, the reducing agent adopted in electronation-precipitation process is ferrous sulfate, and precipitating reagent is calcium hydroxide.Solution after electronation-precipitation process is still used for chromium-polluted soil drip washing as eluent after system dosing.
Repairing effect: analytical test is carried out to the total chromium repaired in rear soil and content of 6-valence Cr ions, carry out to soil after reparation leachings with " solid waste turnover toxicity turnover method-sulfonitric method " (HJ/T299-2007) to process, total chromium more respectively in mensuration leachate and content of 6-valence Cr ions.
According to measurement result, after repairing, in soil extract, hexavalent chromium concentration is 0.030-0.080mg/L, and after converting, in soil, hexavalent chromium concentration is 3.5-8.5mg/kg, hexavalent chromium removal rate more than 99.50%, and after repairing, soil meets this place risk control requirement (Cr
6+<50mg/kg, this value calculates according to " contaminated site risk assessment technology directive/guide " (HJ25.3-2014)).
According to measurement result, after reduction-precipitation, hexavalent chromium concentration is 0-0.0100mg/L in solution, meet " groundwater quality standard " (GB/T14848-93) III class water standard require (0.05mg/L).
Embodiment 2: a kind of chromic method in reparation chromium-polluted soil, adopt the aqueous solution of sodium ethylene diamine tetracetate become with the solution of sodium carbonate pH value be 8.0 Soil leaching agent, the compound method of eluent is the aqueous solution with 0.15mol/L sodium ethylene diamine tetracetate, then adds solid sodium carbonate mixing and be mixed with the alkalescent mixed solution that pH value is 8.0; Carry out ball milling drip washing with above-mentioned eluent to chromium-polluted soil, the liquid-solid ratio of eluent and chromium-polluted soil is 1L:450g, and drip washing temperature is 20 DEG C, and the drip washing time is 240min; Separation of Solid and Liquid, solid after separation is for repairing rear soil, separately him can be used as after air-dry, the hexavalent chromium solution that contains after separation adopts electronation-precipitation method to make Cr VI finally change harmless trivalent chromium sediment into, the reducing agent adopted in electronation-precipitation process is ferrous sulfate, and precipitating reagent is calcium hydroxide.Solution after electronation-precipitation process is still used for chromium-polluted soil drip washing as eluent after system dosing.
Repairing effect: analytical test is carried out to the total chromium repaired in rear soil and content of 6-valence Cr ions, carry out to soil after reparation leachings with " solid waste turnover toxicity turnover method-sulfonitric method " (HJ/T299-2007) to process, total chromium more respectively in mensuration leachate and content of 6-valence Cr ions.
According to measurement result, after repairing, in soil extract, hexavalent chromium concentration is 0.025-0.070mg/L, and after converting, in soil, hexavalent chromium concentration is 3.0-7.5mg/kg, hexavalent chromium removal rate more than 99.80%, and after repairing, soil meets this place risk control requirement (Cr
6+<50mg/kg, this value calculates according to " contaminated site risk assessment technology directive/guide " (HJ25.3-2014)).
According to measurement result, after reduction-precipitation, hexavalent chromium concentration is 0-0.0100mg/L in solution, meet " groundwater quality standard " (GB/T14848-93) III class water standard require (0.05mg/L).
Embodiment 3: a kind of chromic method in reparation chromium-polluted soil, adopt the aqueous solution of sodium ethylene diamine tetracetate become with the solution of potassium hydroxide pH value be 9.0 Soil leaching agent, the compound method of eluent is the aqueous solution with 0.10mol/L sodium ethylene diamine tetracetate, then the aqueous solution mixing adding potassium hydroxide is mixed with the alkalescent mixed solution that pH value is 9.0; Carry out stirring drip washing with above-mentioned eluent to chromium-polluted soil, the liquid-solid ratio of eluent and chromium-polluted soil is 1L:260g, and drip washing temperature is 0 DEG C, and the drip washing time is 180min; Separation of Solid and Liquid, solid after separation is for repairing rear soil, can direct landfill after air-dry, after separation containing hexavalent chromium solution, electronation-precipitation method are adopted to make Cr VI finally change harmless trivalent chromium sediment into, the reducing agent adopted in electronation-precipitation process is ferrous sulfate, and precipitating reagent is calcium hydroxide.Solution after electronation-precipitation process is still used for chromium-polluted soil drip washing as eluent after system dosing.
Repairing effect: analytical test is carried out to the total chromium repaired in rear soil and content of 6-valence Cr ions, carry out to soil after reparation leachings with " solid waste turnover toxicity turnover method-sulfonitric method " (HJ/T299-2007) to process, total chromium more respectively in mensuration leachate and content of 6-valence Cr ions.
According to measurement result, after repairing, in soil extract, hexavalent chromium concentration is 0.035-0.095mg/L, after converting, in soil, hexavalent chromium concentration is 4.0-10.5mg/kg, hexavalent chromium removal rate more than 99.00%, after repairing, soil meets this place risk control requirement (Cr6+<50mg/kg, this value calculates according to " contaminated site risk assessment technology directive/guide " (HJ25.3-2014)).
According to measurement result, after reduction-precipitation, hexavalent chromium concentration is 0-0.0100mg/L in solution, meet " groundwater quality standard " (GB/T14848-93) III class water standard require (0.05mg/L).
Claims (6)
1. repair chromic method in chromium-polluted soil for one kind, it is characterized in that: (one). adopt the alkaline solution of sodium ethylene diamine tetracetate as eluent chromic in soil, the compound method of eluent is the aqueous solution with 0.02-0.15mol/L sodium ethylene diamine tetracetate, then adds alkali or the mixing of its aqueous solution is mixed with the alkalescent mixed solution that pH value is 8.0-10.0; (2). adopt above-mentioned solution as eluent chromic in chromium-polluted soil, eluent is used to carry out stirring drip washing to chromium-polluted soil, the liquid-solid ratio of eluent and chromium-polluted soil is 1L:50-450g, and the drip washing temperature of chromium-polluted soil is 0-40 DEG C, and the drip washing time is 30-240min; (3). Separation of Solid and Liquid, the liquid after separation is for containing chromic liquid, and the solid after separation is the soil solid after process, can direct landfill or be separately used as him after air-dry.
2. one according to claim 1 repairs chromic method in chromium-polluted soil, it is characterized in that raw material alkali in eluent preparation or its aqueous solution adopt sodium carbonate or its aqueous solution.
3. one according to claim 1 repairs chromic method in chromium-polluted soil, it is characterized in that raw material alkali in eluent preparation or its aqueous solution adopt NaOH or its aqueous solution.
4. one according to claim 1 repairs chromic method in chromium-polluted soil, it is characterized in that the ELUTION METHOD of chromium-polluted soil preferably adopts mechanical agitation drip washing or ball milling ELUTION METHOD.
5. one according to claim 1 repairs chromic method in chromium-polluted soil, it is characterized in that after solid separation containing Cr VI liquid, electronation-precipitation method are adopted to make Cr VI finally change harmless trivalent chromium sediment into again, the reducing agent adopted in electronation-precipitation process adopts ferrous sulfate, and precipitating reagent adopts calcium hydroxide.
6. one according to claim 5 repairs chromic method in chromium-polluted soil, it is characterized in that the solution through electronation-precipitation process still can return for chromium-polluted soil drip washing as eluent after system dosing.
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| CN106734169A (en) * | 2016-12-28 | 2017-05-31 | 广西博世科环保科技股份有限公司 | The processing method and processing equipment of repairing hexavalent chromium polluted soil |
| CN106964642A (en) * | 2017-05-27 | 2017-07-21 | 山东师范大学 | A kind of intensified by ultrasonic wave oxidation elution combined remediation method in pollution of chromium place |
| CN107008747A (en) * | 2017-05-27 | 2017-08-04 | 山东师范大学 | A kind of microwave reinforced oxidation elution combined remediation method in pollution of chromium place |
| CN110340134A (en) * | 2019-07-18 | 2019-10-18 | 河南省明创环境科技有限公司 | A method of filling repairing polluted soil in situ |
| CN110484263A (en) * | 2019-07-02 | 2019-11-22 | 广东省生态环境技术研究所 | A kind of compound leaching agent and its application |
| CN111215441A (en) * | 2020-01-22 | 2020-06-02 | 湖南金旅环保股份有限公司 | A step-by-step leaching method for remediation of heavy metal chromium-contaminated soil |
| CN112828026A (en) * | 2019-11-25 | 2021-05-25 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Chromium-contaminated soil remediation method |
| CN113102488A (en) * | 2021-04-08 | 2021-07-13 | 上田环境修复有限公司 | Restoration method suitable for hexavalent chromium-containing composite heavy metal contaminated soil |
| CN113399445A (en) * | 2021-07-14 | 2021-09-17 | 河北科技大学 | Method for efficiently leaching and repairing chromium-contaminated soil |
| CN113828630A (en) * | 2021-10-19 | 2021-12-24 | 重庆大学 | Restoration method of hexavalent chromium contaminated soil |
| CN114774129A (en) * | 2022-03-29 | 2022-07-22 | 中冶南方都市环保工程技术股份有限公司 | Electrolyte for electrically repairing hexavalent chromium polluted soil and electric repairing method |
| CN114871262A (en) * | 2022-04-22 | 2022-08-09 | 淄博高新技术产业开发区精细化工和高分子材料研究院 | CO 2 +O 2 Green eluting agent and in-situ eluting process |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304710A (en) * | 1993-02-18 | 1994-04-19 | Envar Services, Inc. | Method of detoxification and stabilization of soils contaminated with chromium ore waste |
| JP2004283757A (en) * | 2003-03-24 | 2004-10-14 | Hazama Corp | Method for purifying soil contaminated with hexavalent chromium and method for using the purified soil |
| CN102411000A (en) * | 2010-09-25 | 2012-04-11 | 鞍钢股份有限公司 | Method for detecting hexavalent chromium in color coating steel plate |
| CN102601106A (en) * | 2012-03-08 | 2012-07-25 | 中国科学院过程工程研究所 | Ectopic leaching restoring device and restoring method for chromic slag polluted soil |
| CN103316906A (en) * | 2013-06-04 | 2013-09-25 | 武汉大学 | Photochemical reduction repairing method for soil polluted by hexavalent chromium |
| CN103521513A (en) * | 2013-10-18 | 2014-01-22 | 中国科学院南京土壤研究所 | Leaching method of soil polluted by hexavalent chromium |
| CN103949468A (en) * | 2014-03-18 | 2014-07-30 | 北京国环建邦环保科技有限公司 | Chromium-polluted soil total-chromium ex-situ treatment method |
| CN104070060A (en) * | 2014-06-20 | 2014-10-01 | 江苏中宜生态土研究院有限公司 | Repair method of chromium-contaminated soil |
| CN104307868A (en) * | 2014-09-16 | 2015-01-28 | 青海省环境科学研究设计院 | Method for removing hexavalent chromium from polluted soil |
-
2015
- 2015-08-11 CN CN201510494866.7A patent/CN105127190A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304710A (en) * | 1993-02-18 | 1994-04-19 | Envar Services, Inc. | Method of detoxification and stabilization of soils contaminated with chromium ore waste |
| JP2004283757A (en) * | 2003-03-24 | 2004-10-14 | Hazama Corp | Method for purifying soil contaminated with hexavalent chromium and method for using the purified soil |
| CN102411000A (en) * | 2010-09-25 | 2012-04-11 | 鞍钢股份有限公司 | Method for detecting hexavalent chromium in color coating steel plate |
| CN102601106A (en) * | 2012-03-08 | 2012-07-25 | 中国科学院过程工程研究所 | Ectopic leaching restoring device and restoring method for chromic slag polluted soil |
| CN103316906A (en) * | 2013-06-04 | 2013-09-25 | 武汉大学 | Photochemical reduction repairing method for soil polluted by hexavalent chromium |
| CN103521513A (en) * | 2013-10-18 | 2014-01-22 | 中国科学院南京土壤研究所 | Leaching method of soil polluted by hexavalent chromium |
| CN103949468A (en) * | 2014-03-18 | 2014-07-30 | 北京国环建邦环保科技有限公司 | Chromium-polluted soil total-chromium ex-situ treatment method |
| CN104070060A (en) * | 2014-06-20 | 2014-10-01 | 江苏中宜生态土研究院有限公司 | Repair method of chromium-contaminated soil |
| CN104307868A (en) * | 2014-09-16 | 2015-01-28 | 青海省环境科学研究设计院 | Method for removing hexavalent chromium from polluted soil |
Non-Patent Citations (1)
| Title |
|---|
| 周井刚 等: "利用EDTA溶液淋洗修复重金属污染土壤", 《广州环境科学》 * |
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|---|---|---|---|---|
| CN106734169A (en) * | 2016-12-28 | 2017-05-31 | 广西博世科环保科技股份有限公司 | The processing method and processing equipment of repairing hexavalent chromium polluted soil |
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| CN112828026A (en) * | 2019-11-25 | 2021-05-25 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Chromium-contaminated soil remediation method |
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| CN113102488A (en) * | 2021-04-08 | 2021-07-13 | 上田环境修复有限公司 | Restoration method suitable for hexavalent chromium-containing composite heavy metal contaminated soil |
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| CN113828630A (en) * | 2021-10-19 | 2021-12-24 | 重庆大学 | Restoration method of hexavalent chromium contaminated soil |
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| CN114774129A (en) * | 2022-03-29 | 2022-07-22 | 中冶南方都市环保工程技术股份有限公司 | Electrolyte for electrically repairing hexavalent chromium polluted soil and electric repairing method |
| CN114774129B (en) * | 2022-03-29 | 2024-01-23 | 中冶南方都市环保工程技术股份有限公司 | Electrolyte for electrically repairing hexavalent chromium polluted soil and electrically repairing method |
| CN114871262A (en) * | 2022-04-22 | 2022-08-09 | 淄博高新技术产业开发区精细化工和高分子材料研究院 | CO 2 +O 2 Green eluting agent and in-situ eluting process |
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