CN101362145A - Chemical leaching repairing method for heavy metal and arsenic mercury contaminated soil - Google Patents
Chemical leaching repairing method for heavy metal and arsenic mercury contaminated soil Download PDFInfo
- Publication number
- CN101362145A CN101362145A CNA2008101983940A CN200810198394A CN101362145A CN 101362145 A CN101362145 A CN 101362145A CN A2008101983940 A CNA2008101983940 A CN A2008101983940A CN 200810198394 A CN200810198394 A CN 200810198394A CN 101362145 A CN101362145 A CN 101362145A
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- Prior art keywords
- soil
- heavy metal
- arsenic
- repairing method
- chemical leaching
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- Granted
Links
- 239000002689 soil Substances 0.000 title claims abstract description 67
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000002386 leaching Methods 0.000 title claims abstract description 22
- 239000000126 substance Substances 0.000 title claims abstract description 16
- XBBAEVVIDHSGKC-UHFFFAOYSA-N [As].[Hg] Chemical compound [As].[Hg] XBBAEVVIDHSGKC-UHFFFAOYSA-N 0.000 title claims abstract description 5
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 11
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 8
- 229910052793 cadmium Inorganic materials 0.000 abstract description 13
- 229910052802 copper Inorganic materials 0.000 abstract description 13
- 239000010949 copper Substances 0.000 abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 12
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052725 zinc Inorganic materials 0.000 abstract description 12
- 239000011701 zinc Substances 0.000 abstract description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 11
- 239000011133 lead Substances 0.000 abstract description 10
- 229910052785 arsenic Inorganic materials 0.000 abstract description 9
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 9
- 229910052753 mercury Inorganic materials 0.000 abstract description 9
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 8
- 239000012141 concentrate Substances 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- CVXNLQMWLGJQMZ-UHFFFAOYSA-N arsenic zinc Chemical compound [Zn].[As] CVXNLQMWLGJQMZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 231100000749 chronicity Toxicity 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to soil heavy metal pollution treatment technology, in particular to a chemical leaching restoration method used for heavy metal and arsenic mercury polluted soil. Prior soil chemical leaching restoration methods concentrate on the polluted soil caused by one or a plurality of heavy metals (cadmium, copper, lead and zinc, etc.,), which do not have ideal restoration effect to soil with the pollution of both arsenic in the form of negative ions and mercury which is volatile metal. Aiming at the problem, the method uses the combination of three reagents, namely, Na2EDTA, oxalic acid and KI and leaching method with fractional steps for realizing the chemical restoration of the cadmium, the copper, the lead, the zinc, the arsenic and the mercury, etc., in the polluted soil so that the heavy metal in the polluted soil can reach the environmental safety standards. The soil after the leaching treatment is washed by water, and then is refilled in the original position; therefore, no secondary pollution can be caused.
Description
Technical field
The present invention relates to heavy metal pollution of soil improvement technology, relate in particular to a kind of containing the chemical leaching repairing method of many metallic pollutions soil.
Background technology
Because heavy metal pollution of soil has characteristics such as disguise, chronicity and irreversibility, just be difficult to administer in case be subjected to polluting.China is ten years in the past, and the phytoremediation technology of heavy-metal contaminated soil is because its lower cost and environmentally friendlyly caused numerous concerns.Yet the super accumulation of heavy metal plant has poor growth, biomass is low, growing environment is special, is subjected to the features such as restriction of local climate condition and available plant species, is difficult to satisfy the requirement that industrial waste ground is administered fast.Therefore, have widely that the soil drip washing technology of adaptability and rapidity is international difficult point and hot research problem always, and studied in the laboratory widely and be applied in open-air actual the improvement.
The soil elution method is to come the drip washing contaminated soil with leacheate, and the heavy metal that adsorbs or be fixed on the soil particle is dissolved, and it is recycling to reclaim leacheate then.The method of drip washing and leaching is better for the repairing effect in the area of small size heavy metal severe contamination.First large-scale soil drip washing project is finished in October, 1992 at N.J..According to the report (EPA2000) of EPA in 2000, repairing what have in the new and high technology demonstration project that 4.2% project adopts in the place of more than 600 government-fundeds is exactly soil drip washing technology.The commercial operation of comparative maturity has been arranged at the chemical leaching technology of heavy-metal contaminated soil now.
The contaminated soil that the current research person is used to study focuses mostly at the contaminated soil to a kind of or two or three heavy metal species (cadmium, copper, lead, zinc etc.), and laboratory artificial contamination's method is also usually adopted in the source of pollution.Restorative procedure to the contaminated soil that contains conventional heavy metal cadmium, copper, lead, zinc and the arsenic that exists with anionic form, the coexistence of volatile heavy metal mercury does not simultaneously then appear in the newspapers.The soil drip washing Study on Technology of China is less, and all is in the laboratory lab scale stage, and demonstration project is not arranged as yet.And research also concentrates on aspect desorb or the heavy metallic activation in phytoremediation.
Summary of the invention
The objective of the invention is to administer the deficiency that exists, a kind of soil chemistry leaching repairing method that simultaneously heavy metal and arsenic mercury is all had regulation effect is provided at existing heavy metal pollution of soil.
Soil chemistry leaching repairing method of the present invention comprises the steps:
(1) contaminated soil is used Na
2The washing of at room temperature vibrating of EDTA solution, centrifugal, abandon its eluate;
(2) soil after again step (1) being handled adds the oxalic acid solution washing of at room temperature vibrating, and is centrifugal, abandons its eluate;
(3) soil after again step (2) being handled adds the washing of at room temperature vibrating of KI solution, and is centrifugal, abandons its eluate.
In above-mentioned chemical leaching repairing method, described Na
2The molar concentration of EDTA solution is preferably 0.01mol/L, Na
2The liquid-solid ratio of EDTA solution and soil is preferably 20:1 (ml/g).
In above-mentioned chemical leaching repairing method, the molar concentration of described oxalic acid solution is preferably 0.1mol/L, and the liquid-solid ratio of oxalic acid solution and soil is preferably 20:1 (ml/g).
In above-mentioned chemical leaching repairing method, the molar concentration of described KI solution is preferably 0.1mol/L, and the liquid-solid ratio of KI solution and soil is preferably 20:1 (ml/g).
In above-mentioned chemical leaching repairing method, at the difference of contained heavy metal kind of different contaminated soils and content, can be to the concentration of eluent, in the processing time, parameters such as liquid-solid ratio are carried out certain adjustment.When the heavy metal in soil equal size when higher, increase concentration, processing time and the liquid-solid ratio of eluent, otherwise can suitably reduce.
In above-mentioned chemical leaching repairing method, step (1) is primarily aimed at the removal of the heavy metal (cadmium, copper, lead, zinc etc.) that exists with cationic form in the soil; Step (2) is primarily aimed at the removal of arsenic, simultaneously cadmium, copper, zinc is also had removal effect preferably; Step (3) is primarily aimed at the removal of mercury.
Compared with prior art, the present invention has following beneficial effect:
Existing soil chemistry leaching repairing method concentrates on the contaminated soil to a kind of or two or three heavy metal species (cadmium, copper, lead, zinc etc.), and undesirable to the repairing effect of the contaminated soil of the arsenic that exists with anionic form, the coexistence of volatile heavy metal mercury.At this problem, the invention provides a kind of soil chemistry leaching repairing method that simultaneously cadmium, copper, lead, zinc, arsenic, mercury etc. is all had regulation effect.
This method is mainly utilized Na
2EDTA, three kinds of combination of agents substeps of oxalic acid and KI ELUTION METHOD reaches the chemistry reparation to cadmium, copper, lead, zinc arsenic and mercury etc. in the contaminated soil; The Na that the present invention is selected
2EDTA has removal effect preferably to divalence such as the cadmium that exists in the soil, copper, lead, zinc or trivalent heavy metals, is applied to this class and only contains that to have a cost with the cationic form heavy-metal contaminated soil low, characteristics such as remediation efficiency height; The oxalic acid that the present invention is selected is primarily aimed at the removal of arsenic in the soil, and is good to the removal effect of arsenic, simultaneously cadmium, copper, zinc also had removal effect preferably; The KI that the present invention is selected is primarily aimed at the removal of mercury in soils.Heavy metal reaches environmental safety standard in the contaminated soil thereby make.Soil after drip washing is handled is filled out the reposition reason after clear water cleans, can not cause secondary pollution.
The specific embodiment
The invention will be further described by the following examples.
Embodiment 1: soil remediation
Gather Guangzhou Nitrogenous Fertilizer Factory's former warehouse contaminated soil, heavy metal-polluted soil background content: arsenic content 74.4mg/kg, copper 325.0mg/kg, cadmium 1.73mg/kg, plumbous 254.4mg/kg, zinc 258.6mg/kg, PH=7.31.With the soil gathered natural air drying at ambient temperature, again soil is broken gently into pieces the back and crossed the 2mm sieve.
Take by weighing soil after the 1g screening in centrifuge tube, add 0.01mol/L Na
2The washing of at room temperature vibrating of EDTA solution, horizontal hunting speed is 180 rev/mins, and is centrifugal, abandons its eluate; Na
2The liquid-solid ratio of EDTA solution and soil is 20:1 (ml/g).
Again to the soil after handling, add the washing of at room temperature vibrating of 0.1mol/L oxalic acid solution, horizontal hunting speed is 180 rev/mins, and is centrifugal, abandons its eluate; The liquid-solid volume ratio of oxalic acid solution and soil is 20:1 (ml/g).
Again to the soil after handling, add the washing of at room temperature vibrating of 0.1mol/LKI solution, horizontal hunting speed is 180 rev/mins, and is centrifugal, abandons its eluate, the liquid-solid volume ratio of KI solution and soil is 20:1 (ml/g).
After extracting continuously with three kinds of reagent respectively in order, to the accumulative total clearance of each heavy metal species be: As 49.9%, and Cd 47.9%, and Cu 73.1%, and Pb 26.7%, and Zn 40.1%, and Hg 40.1%.The content of handling each heavy metal species in the soil of back is up to state standards.
Claims (4)
1. a chemical leaching repairing method that is used for heavy metal and arsenic mercury contaminated soil is characterized in that comprising the steps:
(1) contaminated soil is used Na
2The washing of at room temperature vibrating of EDTA solution, centrifugal, abandon its eluate;
(2) soil after again step (1) being handled adds the oxalic acid solution washing of at room temperature vibrating, and is centrifugal, abandons its eluate;
(3) soil after again step (2) being handled adds the washing of at room temperature vibrating of KI solution, and is centrifugal, abandons its eluate.
2. chemical leaching repairing method as claimed in claim 1 is characterized in that described Na
2The molar concentration of EDTA solution is 0.01mol/L, Na
2The liquid-solid ratio of EDTA solution and soil is 20 milliliters: 1 gram.
3. chemical leaching repairing method as claimed in claim 1, the molar concentration that it is characterized in that described oxalic acid solution is 0.1mol/L, the liquid-solid ratio of oxalic acid solution and soil is 20 milliliters: 1 gram.
4. chemical leaching repairing method as claimed in claim 1, the molar concentration that it is characterized in that described KI solution is 0.1mol/L, the liquid-solid ratio of KI solution and soil is 20 milliliters: 1 gram.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101983940A CN101362145B (en) | 2008-09-12 | 2008-09-12 | Chemical leaching repairing method for heavy metal contaminated soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101983940A CN101362145B (en) | 2008-09-12 | 2008-09-12 | Chemical leaching repairing method for heavy metal contaminated soil |
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| Publication Number | Publication Date |
|---|---|
| CN101362145A true CN101362145A (en) | 2009-02-11 |
| CN101362145B CN101362145B (en) | 2011-02-09 |
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|---|---|---|---|
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500612A (en) * | 2011-10-28 | 2012-06-20 | 中南大学 | Chemical leaching restoring method for soil polluted by heavy metals |
| CN102601108A (en) * | 2012-03-06 | 2012-07-25 | 合肥市吴山固体废物处置有限责任公司 | Method for treating arsenic polluted soil |
| CN102745872A (en) * | 2012-07-26 | 2012-10-24 | 山东建筑大学 | Treatment method and device for riverway and lake heavy metal pollution bottom sludge |
| CN102873086A (en) * | 2012-10-09 | 2013-01-16 | 北京大学 | Mercury contaminated soil in-situ restoration method |
| CN103028598A (en) * | 2013-01-06 | 2013-04-10 | 四川农业大学 | Application of polyacrylamide in removal of soil heavy metal zinc pollution |
| CN103084384A (en) * | 2013-01-08 | 2013-05-08 | 四川农业大学 | Application of oxalic acid in removal of soil cadmium pollution |
| CN103555338A (en) * | 2013-10-21 | 2014-02-05 | 环境保护部华南环境科学研究所 | Method and eluting agent for joint treatment of lead-zinc pollution by surfactant and chelating agent |
| CN103639188A (en) * | 2013-12-17 | 2014-03-19 | 辽宁石油化工大学 | Method for restoring copper polluted soil with diethylenetriamine penta(methylene phosphonic acid) (DTPMPA) |
| CN103861867A (en) * | 2014-02-19 | 2014-06-18 | 江苏日升环保工程有限公司 | Elution-method soil remediation process |
| CN104289504A (en) * | 2014-10-21 | 2015-01-21 | 苗庆龄 | Comprehensive heavy metal contaminated soil remediation method |
| CN104438310A (en) * | 2014-10-23 | 2015-03-25 | 江苏盖亚环境工程有限公司 | Leaching remediation method of arsenic-polluted soil |
| CN105032910A (en) * | 2015-06-12 | 2015-11-11 | 湖南大学 | Composite eluting agent for repairing arsenic contaminated soil and application method thereof |
| CN105414164A (en) * | 2015-12-28 | 2016-03-23 | 钦州学院 | Repair method of arsenic-polluted soil |
| CN106433674A (en) * | 2016-09-20 | 2017-02-22 | 中节能六合天融环保科技有限公司 | Heavy metal compound contaminated soil leaching remediation agent, preparation method thereof and remediation method using same |
| CN106433649A (en) * | 2016-09-22 | 2017-02-22 | 北京新源环境有限公司 | Chemical eluting agent for repairing mercury polluted soil and application method of chemical eluting agent |
| CN107413823A (en) * | 2017-08-24 | 2017-12-01 | 航天凯天环保科技股份有限公司 | A kind of method that mercurous dangerous waste residue is administered in low temperature thermal desorption amalgamation elution |
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| CN111672898A (en) * | 2020-06-30 | 2020-09-18 | 南京浦世环境科技发展有限公司 | Chemical leaching method for heavy metal contaminated soil |
| CN114192561A (en) * | 2021-11-17 | 2022-03-18 | 广东工业大学 | Remediation method for cadmium-containing contaminated soil and application thereof |
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| CN1785538A (en) * | 2005-10-28 | 2006-06-14 | 中山大学 | Method of treating arsenic pollution of solid or water |
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2008
- 2008-09-12 CN CN2008101983940A patent/CN101362145B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500612A (en) * | 2011-10-28 | 2012-06-20 | 中南大学 | Chemical leaching restoring method for soil polluted by heavy metals |
| CN102500612B (en) * | 2011-10-28 | 2013-06-05 | 中南大学 | Chemical leaching restoring method for soil polluted by heavy metals |
| CN102601108A (en) * | 2012-03-06 | 2012-07-25 | 合肥市吴山固体废物处置有限责任公司 | Method for treating arsenic polluted soil |
| CN102745872A (en) * | 2012-07-26 | 2012-10-24 | 山东建筑大学 | Treatment method and device for riverway and lake heavy metal pollution bottom sludge |
| CN102873086A (en) * | 2012-10-09 | 2013-01-16 | 北京大学 | Mercury contaminated soil in-situ restoration method |
| CN102873086B (en) * | 2012-10-09 | 2014-03-26 | 北京大学 | Mercury contaminated soil in-situ restoration method |
| CN103028598A (en) * | 2013-01-06 | 2013-04-10 | 四川农业大学 | Application of polyacrylamide in removal of soil heavy metal zinc pollution |
| CN103084384A (en) * | 2013-01-08 | 2013-05-08 | 四川农业大学 | Application of oxalic acid in removal of soil cadmium pollution |
| CN103555338A (en) * | 2013-10-21 | 2014-02-05 | 环境保护部华南环境科学研究所 | Method and eluting agent for joint treatment of lead-zinc pollution by surfactant and chelating agent |
| CN103555338B (en) * | 2013-10-21 | 2016-06-29 | 环境保护部华南环境科学研究所 | The method of surfactant and chelating agen Combined Treatment lead zinc pollution and eluent thereof |
| CN103639188A (en) * | 2013-12-17 | 2014-03-19 | 辽宁石油化工大学 | Method for restoring copper polluted soil with diethylenetriamine penta(methylene phosphonic acid) (DTPMPA) |
| CN103861867B (en) * | 2014-02-19 | 2016-01-13 | 江苏日升环保工程有限公司 | A kind of elution method soil remediation technique |
| CN103861867A (en) * | 2014-02-19 | 2014-06-18 | 江苏日升环保工程有限公司 | Elution-method soil remediation process |
| CN104289504A (en) * | 2014-10-21 | 2015-01-21 | 苗庆龄 | Comprehensive heavy metal contaminated soil remediation method |
| CN104289504B (en) * | 2014-10-21 | 2016-03-30 | 武汉文科生态环境有限公司 | A kind of method for comprehensive repairing of heavy-metal contaminated soil |
| CN104438310B (en) * | 2014-10-23 | 2016-08-17 | 江苏盖亚环境工程有限公司 | A kind of leaching repairing method of As polluted soil |
| CN104438310A (en) * | 2014-10-23 | 2015-03-25 | 江苏盖亚环境工程有限公司 | Leaching remediation method of arsenic-polluted soil |
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| CN105414164B (en) * | 2015-12-28 | 2018-05-18 | 钦州学院 | A kind of restorative procedure of As polluted soil |
| CN105414164A (en) * | 2015-12-28 | 2016-03-23 | 钦州学院 | Repair method of arsenic-polluted soil |
| CN106433674A (en) * | 2016-09-20 | 2017-02-22 | 中节能六合天融环保科技有限公司 | Heavy metal compound contaminated soil leaching remediation agent, preparation method thereof and remediation method using same |
| CN106433649A (en) * | 2016-09-22 | 2017-02-22 | 北京新源环境有限公司 | Chemical eluting agent for repairing mercury polluted soil and application method of chemical eluting agent |
| CN107413823A (en) * | 2017-08-24 | 2017-12-01 | 航天凯天环保科技股份有限公司 | A kind of method that mercurous dangerous waste residue is administered in low temperature thermal desorption amalgamation elution |
| CN107413823B (en) * | 2017-08-24 | 2020-10-02 | 航天凯天环保科技股份有限公司 | Method for treating mercury-containing dangerous waste residues by combining low-temperature thermal desorption with chemical leaching |
| CN110235896A (en) * | 2018-03-07 | 2019-09-17 | 南京农业大学 | It is a kind of to inhibit wheat seed to the blade face barrier and its application method, research method and application of heavy metal cadmium absorption, transhipment |
| CN110235896B (en) * | 2018-03-07 | 2021-04-27 | 南京农业大学 | Foliage blocking agent for inhibiting absorption and transportation of heavy metal cadmium in wheat grains and using method, research method and application thereof |
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| CN114192561A (en) * | 2021-11-17 | 2022-03-18 | 广东工业大学 | Remediation method for cadmium-containing contaminated soil and application thereof |
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