CN103143555A - Reducibility solidification stabilization method of processing soil polluted by toxic organics - Google Patents
Reducibility solidification stabilization method of processing soil polluted by toxic organics Download PDFInfo
- Publication number
- CN103143555A CN103143555A CN201310039751XA CN201310039751A CN103143555A CN 103143555 A CN103143555 A CN 103143555A CN 201310039751X A CN201310039751X A CN 201310039751XA CN 201310039751 A CN201310039751 A CN 201310039751A CN 103143555 A CN103143555 A CN 103143555A
- Authority
- CN
- China
- Prior art keywords
- organic compound
- solidification
- toxic organic
- contaminated soil
- reproducibility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a reducibility solidification stabilization method of processing soil polluted by toxic organics, and belongs to the technical fields of hazardous waste treatment and polluted field repair in environmental protection. The reducibility solidification stabilization method of the processing the soil polluted by the toxic organics comprises firstly, adding the soil which is polluted by the toxic organics, water, and a divalent molysite solution into a stirrer, stirring for 40 minutes-60 minutes; enabling the toxic organics to obtain degradation to the maximum extent; and adding inorganic grouting agent curing agents, continuously stirring until materials are evenly mixed, opening a discharge gate of the stirrer to discharge the evenly mixed materials; and at last, forming solidified body building blocks in a regular shape after carrying out a molding procedure on the mixed materials, conveying the building blocks into a maintenance workshop to carry out maintenance or directly placing the building blocks into packaging bags, and accomplishing reducibility solidification stabilization of the soil polluted by the toxic organics. The reducibility solidification stabilization method of the processing soil polluted by the toxic organics has the advantages of being high in a removal rate to the toxic organics, high in a solidification rate to residual pollutants, simple in operation, good in adaptability, and wide in use range.
Description
Technical field
The invention belongs in environmental protection that hazardous waste is processed and contaminated site recovery technique field, particularly a kind of method of reproducibility solidification and stabilization processing toxic organic compound contaminated soil.
Background technology
For a long time, the chloro toxic organic compound is applied to the industries such as medicine, chemical industry, electronics, process hides more and more as important industrial chemicals and organic solvent, and people produce and use a large amount of chloro toxic organic compounds every year.Because most of chloro toxic organic compounds all have low aqueous solubility, high cumulative characteristics, be easy to enrichment in soil, caused serious soil pollution; Simultaneously, quickening along with Chinese Urbanization and process of industrialization, raising to the environment attention degree, urban structure and layout need further to adjust and optimize, cause a large amount of chemical industry, pesticide producing enterprises remove, much be adjusted into inhabitation or commercial land etc. in original soil, these are left over the place and have assembled a large amount of chloro toxic organic compounds.The chloro toxic organic compound is detained in soil or moves in air, water body, soil by modes such as volatilization, leaching, diffusions, or is moved out outside the soil body by bio-absorbable, and then health, animals and plants and the whole ecosystem are brought great harm; In addition, China's Sudden Pollution Accident takes place frequently, and the hazardous wastes that contain toxic organic compound that belong to such as a large amount of deposits that the scene of the accident clears out, soil are badly in need of being dealt carefully with at short notice more.The solidification and stabilization technology has been widely used in hazardous waste and has processed in disposal, its objective is by various physics chemical action, change hazardous waste into can not flow solid or be closed in tight solid, make its hazardous contaminant change the process of low-solubility, low migration and hypotoxicity material into, so that refuse transportation, utilization and final disposal.
At present, for the solidification and stabilization technology that contains heavy metal class hazardous waste comparative maturity, but still need further perfect for the solidification and stabilization technology that contains the toxic organic compound hazardous waste.Compare with heavy metal, toxic organic compound is of a great variety, physicochemical characteristics is complicated, fixing containing difficulty is large, and therefore containing toxic organic compound hazardous waste solidification and stabilization technology has many characteristics that contain heavy metal hazardous waste solidification and stabilization technology that are different from." the hazardous waste judging standard leaching characteristic identification " that came into effect from 2007 (GB5085.3-2007) differentiated on the basis of project 14 of primary standards (GB5085.3-1996), 37 discriminating projects have been increased, new projects are mainly for toxic organic compound, for this reason correspondingly increase the toxic organic compound index in " hazard waste landfill pollution control criterion " imperative, containing when the time comes the toxic organic compound hazardous waste must be first through the solidification and stabilization pretreatment, and reaching certain control criterion could landfill.
The optimization that solidification and stabilization is processed the inorganic cementing agent prescription that contains the toxic organic compound hazardous waste has been summed up by this seminar in the research in early stage, and the solidification and stabilization method that contains the toxic organic compound hazardous waste.Process to dispose for the solidification and stabilization that contains the toxic organic compound hazardous waste feasible path is provided.
But simple curing/stabilizing can only the fixed-contamination thing, and can not destroy the removal pollutant, so its potential hazard to environment is still larger.For toxic organic compound, if may be reduced the characteristics of detoxifcation for it, add certain or multiple reducing agent in the solidification and stabilization process, make organic matter and realize reduction and detoxication in the solidification and stabilization process and in landfill yard, the environmental safety of its solidification and stabilization product will improve greatly.Therefore, develop a kind of method that reproducibility solidification and stabilization is processed the toxic organic compound contaminated soil, with more satisfying reality, requirement is controlled in the environmental pollution of toxic organic compound hazardous waste.
Summary of the invention
The present invention is on the basis of the solidification and stabilization treatment effect that guarantees the toxic organic compound hazardous waste, realize that toxic organic compound reaches the reduction and detoxication in landfill yard in the solidification and stabilization process, provide the reproducibility solidification and stabilization method of the toxic organic compound contaminated soil take divalent iron salt as main reducing agent.
A kind of reproducibility solidification and stabilization is processed the method for toxic organic compound contaminated soil, it is characterized in that, described method comprises the steps:
(1) toxic organic compound contaminated soil, water and divalent iron salt solution are added agitator, stirred 40-60 minute; Wherein, the quality of divalent iron salt be soil poisoning organic matter quality 2-3 doubly; The mass ratio of toxic organic compound contaminated soil and water is 1:(2-2.5);
(2) add inorganic cementing agent curing agent in the material that stirs through step (1), make total mixture material volume be no more than 2/3rds of agitator volume; Continue to be stirred to mixing of materials evenly after, the turn on agitator discharge gate is discharged the material that mixes; Wherein, the mass ratio of described inorganic cementing agent curing agent and toxic organic compound contaminated soil is 1:(1-1.5);
(3) will form the firming body building block of regular shape after the mixed material process molding procedure that step (2) is processed, and send into the maintenance factory building and carry out maintenance or directly be placed in packaging bag, complete the reproducibility solidification and stabilization of toxic organic compound contaminated soil.
Wherein,
Front in described step (1), measure the organic concentration of contaminated soil Poisoning;
In step (1), described divalent iron salt solution generally adopts copperas solution or solution of ferrous chloride;
In step (1), described water is the hot water of 80-100 ℃;
In step (2), described inorganic cementing agent curing agent is hydraulic cementing materials; Generally formed by one or more in cement, lime, flyash, silicates, aluminate class, volcanic ash, silicon ash;
Described agitator is the obturator that horizontal-type biaxial stirs, and charging aperture is positioned at the device top, and discharge gate is positioned at bottom of device, belongs to the batch-type operating means.
Beneficial effect of the present invention is:
1, the present invention by add micro-reducing agent in the toxic organic compound contaminated soil, with the toxic organic compound reduction and detoxication, then passes through the physical chemistry stabilization effect of cement reinforcement residual toxicity organic matter and heavy metal in whipping process; In product, the clearance of fat hydrocarbon toxic organic compound can reach 50-60%, and residual contaminants fixedly rate can reach more than 90%;
2, simple to operate, the strong adaptability of method provided by the invention can directly carry out in toxic organic compound contaminated soil place original position or dystopy and administer, also applicable to the emergency processing reparation in sudden great environmental pollution accident Poisoning Organic Pollution place.
The specific embodiment
The present invention will be further described in detail below in conjunction with specific embodiment:
Embodiment 1:
(1) measure the organic concentration of contaminated soil Poisoning;
(2) add the 2-3 divalent iron salt doubly that is equivalent to the toxic organic compound quality in the toxic organic compound contaminated soil, and contaminated soil quality 2-2.5 water, turn on agitator doubly stirred 40-60 minute;
(3) after interval 5-24 hour, be 1:(1-1.5 in the mass ratio of inorganic cementing agent curing agent and toxic organic compound contaminated soil) ratio add inorganic cementing agent curing agent, again stir and made mixing of materials even in 5-10 minute;
(4) above-mentioned mixed material stacked or entered landfill yard through the firming body building block original position that forms regular shape after molding procedure, completing the reproducibility solidification and stabilization of toxic organic compound contaminated soil.
The reducing agent that works that method provided by the invention relates to may have three kinds of forms in the solidification and stabilization process and in landfill yard:
(1) Fe(II) ion.When not adding curing agent, in whipping process, ferrous iron and toxic organic compound key reaction approach are 2Fe
2++ RX+H
+→ 2Fe
3++ RH+X
-Thereby, realize the reduction and detoxication of toxic organic compound.
(2) hydrate Fe(II)-Fe(III).Add micro Fe (III) in the system reaction rate is improved, as the Fe(III that adds) make Fe(II in system)/Fe(III)=3 the time, just in time to Fe(II)-Fe(III) composition of hydrate patina is similar.
(3) solid-state Fe(II).When not adding curing agent, have Fe (OH) in whipping process
2Form, it is oxidized to Fe (OH)
3In process, toxic organic compound there is certain deoxidization, degradation effect; After adding curing agent, the silicate material in cement system may with Fe(II) solid that forms plays the deoxidization, degradation effect.
The assay method of contaminated soil Poisoning organic concentration carries out according to listed GB5085.3-200X assay method in GB5085.3-2007 " hazardous waste judging standard-leaching characteristic identification ".Firming body leaches with reference to U.S.'s toxic characteristic leaching program (toxicity characteristic leaching procedure, TCLP) and China " solid waste Leaching leaching method-hac buffer method " (HJ/T 300-2007) and carries out.
Embodiment 2:
Compound concentration is 293 mg/kg trichloro-ethylene (PCE) contaminated soils; Add the copperas solution of the ferrous iron content that is equivalent to 3 times of PCE quality in above-mentioned soil, and the mass ratio that conserves water and soil is 1.5:1, stirs 60 min under 50 ℃ of conditions; Test result: PCE 134.2 mg/kg, product are the dichloroethylene of low toxicity; Add portland cement after the 24h of interval, addition is 2/3 of soil quality, again stirs 10min, test result again: PCE 120.2 mg/kg, product are the dichloroethylene of low toxicity.After curing conservation 1d, 5d, 10d, 20d, the curing/stabilizing rate of PCE is respectively 94.08%, 96.75%, 99.26%, 99.28%.
Claims (9)
1. the method for a reproducibility solidification and stabilization processing toxic organic compound contaminated soil, is characterized in that, described method comprises the steps:
(1) toxic organic compound contaminated soil, water and divalent iron salt solution are added agitator, stirred 40-60 minute; Wherein, the quality of divalent iron salt be soil poisoning organic matter quality 2-3 doubly; The mass ratio of toxic organic compound contaminated soil and water is 1:(2-2.5);
(2) add inorganic cementing agent curing agent in the material that stirs through step (1), continue to be stirred to mixing of materials evenly after, the turn on agitator discharge gate is discharged the material that mixes; Wherein, the mass ratio of described inorganic cementing agent curing agent and toxic organic compound contaminated soil is 1:(1-1.5);
(3) will form the firming body building block of regular shape after the mixed material process molding procedure that step (2) is processed, and send into the maintenance factory building and carry out maintenance or directly be placed in packaging bag, complete the reproducibility solidification and stabilization of toxic organic compound contaminated soil.
2. reproducibility solidification and stabilization according to claim 1 is processed the method for toxic organic compound contaminated soil, it is characterized in that, add inorganic cementing agent curing agent in the material that stirs through step (1), make total mixture material volume be no more than 2/3rds of agitator volume.
3. method according to claim 1, is characterized in that, and is front in described step (1), measures the organic concentration of contaminated soil Poisoning.
4. reproducibility solidification and stabilization according to claim 1 is processed the method for toxic organic compound contaminated soil, it is characterized in that, in step (1), described divalent iron salt solution is copperas solution or solution of ferrous chloride.
5. reproducibility solidification and stabilization according to claim 1 is processed the method for toxic organic compound contaminated soil, it is characterized in that, in step (1), described water is the hot water of 80-100 ℃.
6. reproducibility solidification and stabilization according to claim 1 is processed the method for toxic organic compound contaminated soil, it is characterized in that, after processing through step (1), interval 5-24 hour, mass ratio in inorganic cementing agent curing agent and toxic organic compound contaminated soil is 1:(1-1.5 again) ratio add inorganic cementing agent curing agent, again stir and made mixing of materials even in 5-10 minute.
7. reproducibility solidification and stabilization according to claim 1 is processed the method for toxic organic compound contaminated soil, it is characterized in that, in step (2), described inorganic cementing agent curing agent is hydraulic cementing materials.
8. reproducibility solidification and stabilization according to claim 6 is processed the method for toxic organic compound contaminated soil, it is characterized in that, described hydraulic cementing materials is comprised of one or more in cement, lime, flyash, silicates, aluminate class, volcanic ash, silicon ash.
9. reproducibility solidification and stabilization according to claim 1 is processed the method for toxic organic compound contaminated soil, it is characterized in that, described agitator is the obturator that horizontal-type biaxial stirs, and charging aperture is positioned at the device top, discharge gate is positioned at bottom of device, belongs to the batch-type operating means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310039751XA CN103143555A (en) | 2013-01-31 | 2013-01-31 | Reducibility solidification stabilization method of processing soil polluted by toxic organics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310039751XA CN103143555A (en) | 2013-01-31 | 2013-01-31 | Reducibility solidification stabilization method of processing soil polluted by toxic organics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103143555A true CN103143555A (en) | 2013-06-12 |
Family
ID=48542028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310039751XA Pending CN103143555A (en) | 2013-01-31 | 2013-01-31 | Reducibility solidification stabilization method of processing soil polluted by toxic organics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103143555A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846275A (en) * | 2014-03-27 | 2014-06-11 | 武汉都市环保工程技术股份有限公司 | Stable solidification treatment and sanitary landfill disposal method for polluted soil |
| CN103861868A (en) * | 2014-03-27 | 2014-06-18 | 武汉都市环保工程技术股份有限公司 | Remediation and in-situ backfill method of polluted soil through stable solidification technology |
| CN103894408A (en) * | 2014-03-27 | 2014-07-02 | 武汉都市环保工程技术股份有限公司 | Contaminated soil stabilizing and solidifying treatment and secure backfilling disposal method |
| CN103934261A (en) * | 2014-04-22 | 2014-07-23 | 浙江大学 | Method for ground seepage-proofing and induration of polluted soil working-storage section in field restoration |
| CN106269836A (en) * | 2016-08-10 | 2017-01-04 | 中国环境科学研究院 | The solidification and stabilization method of organic polluted soil and the application in soil remediation thereof |
| CN107641511A (en) * | 2017-07-24 | 2018-01-30 | 中冶华天工程技术有限公司 | For the preparation method and soil remediation method of the stabilization material for administering soil |
| CN108342194A (en) * | 2018-01-16 | 2018-07-31 | 航天凯天环保科技股份有限公司 | A kind of medicament for sulphide staining soil stabilization |
| CN113732050A (en) * | 2021-09-13 | 2021-12-03 | 中冶节能环保有限责任公司 | Contaminated soil solidification and stabilization treatment system and process |
| CN114570754A (en) * | 2021-11-05 | 2022-06-03 | 南京林业大学 | Method for treating low-boiling-point volatile organic polluted soil by using carbon dioxide |
| CN114904901A (en) * | 2022-06-09 | 2022-08-16 | 清华大学 | Stabilized material selection method, apparatus, computer device, medium, and product |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318191A (en) * | 2008-07-08 | 2008-12-10 | 清华大学 | Solidifying and stabilizing method for toxicity containing organic matter dangerous waste matter |
| CN101891367B (en) * | 2010-06-30 | 2012-05-23 | 苏州科技学院 | Solidification and stabilization method of urban sludge |
| WO2012145930A1 (en) * | 2011-04-29 | 2012-11-01 | 同济大学 | Treatment method of persistent organic pollutant in particulates |
| CN102897992A (en) * | 2012-10-18 | 2013-01-30 | 北京工业大学 | Method for solidifying and stabilizing sludge from urban sewage treatment plant |
-
2013
- 2013-01-31 CN CN201310039751XA patent/CN103143555A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318191A (en) * | 2008-07-08 | 2008-12-10 | 清华大学 | Solidifying and stabilizing method for toxicity containing organic matter dangerous waste matter |
| CN101891367B (en) * | 2010-06-30 | 2012-05-23 | 苏州科技学院 | Solidification and stabilization method of urban sludge |
| WO2012145930A1 (en) * | 2011-04-29 | 2012-11-01 | 同济大学 | Treatment method of persistent organic pollutant in particulates |
| CN102897992A (en) * | 2012-10-18 | 2013-01-30 | 北京工业大学 | Method for solidifying and stabilizing sludge from urban sewage treatment plant |
Non-Patent Citations (2)
| Title |
|---|
| INSEON HWANG ET AL: "Reductive Dechlorination of Tetrachloroethylene by Fe(II) in Cement Slurries", 《ENVIRON. SCI. TECHNOL》, no. 34, 31 December 2000 (2000-12-31) * |
| INSEON HWANG ET AL: "Reductive Dechlorination of Tetrachloroethylene in Soils by Fe(II)-Based Degradative Solidification/Stabilization", 《ENVIRON. SCI. TECHNOL》, no. 35, 31 December 2001 (2001-12-31) * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103861868A (en) * | 2014-03-27 | 2014-06-18 | 武汉都市环保工程技术股份有限公司 | Remediation and in-situ backfill method of polluted soil through stable solidification technology |
| CN103894408A (en) * | 2014-03-27 | 2014-07-02 | 武汉都市环保工程技术股份有限公司 | Contaminated soil stabilizing and solidifying treatment and secure backfilling disposal method |
| CN103846275A (en) * | 2014-03-27 | 2014-06-11 | 武汉都市环保工程技术股份有限公司 | Stable solidification treatment and sanitary landfill disposal method for polluted soil |
| CN103934261A (en) * | 2014-04-22 | 2014-07-23 | 浙江大学 | Method for ground seepage-proofing and induration of polluted soil working-storage section in field restoration |
| CN103934261B (en) * | 2014-04-22 | 2015-08-19 | 浙江大学 | A kind of method of the ground antiseepage of Polluted Soil working area and sclerosis in site remediation |
| CN106269836B (en) * | 2016-08-10 | 2019-10-22 | 中国环境科学研究院 | The solidification and stabilization method of organic polluted soil and its application in soil remediation |
| CN106269836A (en) * | 2016-08-10 | 2017-01-04 | 中国环境科学研究院 | The solidification and stabilization method of organic polluted soil and the application in soil remediation thereof |
| CN107641511A (en) * | 2017-07-24 | 2018-01-30 | 中冶华天工程技术有限公司 | For the preparation method and soil remediation method of the stabilization material for administering soil |
| CN108342194A (en) * | 2018-01-16 | 2018-07-31 | 航天凯天环保科技股份有限公司 | A kind of medicament for sulphide staining soil stabilization |
| CN113732050A (en) * | 2021-09-13 | 2021-12-03 | 中冶节能环保有限责任公司 | Contaminated soil solidification and stabilization treatment system and process |
| CN114570754A (en) * | 2021-11-05 | 2022-06-03 | 南京林业大学 | Method for treating low-boiling-point volatile organic polluted soil by using carbon dioxide |
| CN114904901A (en) * | 2022-06-09 | 2022-08-16 | 清华大学 | Stabilized material selection method, apparatus, computer device, medium, and product |
| CN114904901B (en) * | 2022-06-09 | 2024-01-12 | 清华大学 | Stabilized material selection methods, apparatus, computer devices, media, and products |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103143555A (en) | Reducibility solidification stabilization method of processing soil polluted by toxic organics | |
| CN106955888B (en) | The stabilization method of waste residue containing Cr, Cr contaminated soil or combinations thereof | |
| Erdem et al. | Environmental risk assessment and stabilization/solidification of zinc extraction residue: II. Stabilization/solidification | |
| CN108372202A (en) | A method of the reparation medicament for administering heavy-metal contaminated soil and its improvement heavy-metal contaminated soil | |
| CN102218428A (en) | Treatment method of arsenic slag | |
| CN104164238A (en) | Efficient solidification/stabilization repair reagent for soil contaminated by heavy metals | |
| WO1994019121A1 (en) | Method of detoxification and stabilization of soils contaminated with chromium ore waste | |
| CN107789787A (en) | For repairing the stabilization agent and application method of arsenic-containing waste residue | |
| US20050209497A1 (en) | Method for sequenced microstabilization of heavy metal bearing materials and wastes | |
| CN103406333A (en) | Safe disposal method for high-concentration arsenic residue | |
| US20050209496A1 (en) | Method for microstabilization of heavy metal bearing materials and wastes | |
| CN102974601A (en) | Arsenic pollution soil stabilizer and method for repairing contaminated soil | |
| US7736291B2 (en) | Method for stabilization of heavy metals and odor control with dicalcium phosphate dihydrate powder | |
| Conner | Chemical stabilization of contaminated soils | |
| CN104804747A (en) | Calcium-based heavy metal soil repairing agent and preparation method | |
| Silva et al. | Small hazardous waste generators in developing countries: use of stabilization/solidification process as an economic tool for metal wastewater treatment and appropriate sludge disposal | |
| CN100506405C (en) | Chemical process of stabilizing fly ash from incinerating city garbage | |
| US7530939B2 (en) | Method for stabilization of heavy metals in incinerator bottom ash and odor control with dicalcium phosphate dihydrate powder | |
| CN101318191B (en) | Solidifying and stabilizing method for toxicity containing organic matter dangerous waste matter | |
| CN104927871A (en) | Heavy metal stabilizer and method for stabilizing soil heavy metal through same | |
| CN106001096A (en) | Ferrate oxidation co-precipitation-based arsenic-contaminated soil remediation method | |
| CN105967470B (en) | A kind of cadmium copper lead contamination bed mud curing agent and its curing method | |
| CN101502840B (en) | Harmless treatment technique of solid dangerous waste | |
| CN101474468A (en) | Method for treating burning flyash using chelant | |
| CN113458137A (en) | Organic contaminated soil remediation agent and application method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130612 |