CN105598144B - A kind of restorative procedure of contaminated soil - Google Patents

A kind of restorative procedure of contaminated soil Download PDF

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Publication number
CN105598144B
CN105598144B CN201610171376.8A CN201610171376A CN105598144B CN 105598144 B CN105598144 B CN 105598144B CN 201610171376 A CN201610171376 A CN 201610171376A CN 105598144 B CN105598144 B CN 105598144B
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China
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soil
contaminated
restorative procedure
heavy metal
plant
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CN105598144A (en
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徐大勇
洪亚军
操沛沛
裘秀群
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Liuzhou Longjiang Hydropower Construction Co., Ltd
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Anhui Polytechnic University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/08Reclamation of contaminated soil chemically
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/10Reclamation of contaminated soil microbiologically, biologically or by using enzymes
    • B09C1/105Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C2101/00In situ

Abstract

The present invention relates to a kind of restorative procedures of contaminated soil, extracting solution are added to after extracting Heavy Metals in Contaminated Soils in contaminated soil, and by wetland plant plant in contaminated soil, the plant of enriching heavy metal is harvested after 1 Growing season.The present invention absorbs the heavy metal in enrichment leaching liquor by the heavy metal extracted in soil in situ, with water plant, solves the problems, such as the problem of nutritional ingredients such as Soil Nitrogen, phosphorus and potassium can be lost after the post-processing of soil extract leachates and soil extract.It provides one for the reparation of heavy-metal contaminated soil and opens one's minds and approach.

Description

A kind of restorative procedure of contaminated soil
Technical field
The invention belongs to technical field of environmental management, and in particular to a kind of restorative procedure of contaminated soil, especially suitable for The soil of serious pollution in heavy metal small area.
Background technique
The situation is tense for China's heavy metal pollution of soil, shows that arable land heavy metal pollution is serious, and industrial and mining area and its surrounding are dirty The features such as dye aggravation and high background value regional soil heavy metals exceeding standard.Number of ways causes the hair of heavy metal pollution of soil phenomenon It is raw, for example, exploitation, the smelting of heavy metal, sewage irrigation, the application and special geochemistry of fertilizer containing heavy metal, pesticide Circulation etc..Heavy metal has notable features, the soil such as toxicity is big, incubation period is long and can be bioaccumulation once heavy metal-polluted Dye certainly will be amplified by the accumulation of food chain and seriously affect human health.Meanwhile heavy metal pollution of soil can also be by it certainly The Transport And Transformation of body directly contributes the pollution of water environment and air environment.
The restorative procedure of heavy metal-polluted soil is numerous, but from fundamental way there are two types of classification only, first is that by heavy metal-polluted soil Immobilization or Passivation Treatment on the spot make it be changed into invalid state from available state, so that reducing heavy metal enters food chain and periphery The risk of environment.Second is that heavy metal is removed from soil, thoroughly reduces soil using the methods of chemical extraction or bio-absorbable The total amount of heavy metal.Previous approach does not reduce heavy metal-polluted soil total amount, condition be suitable in the case where, heavy metal-polluted soil have by The possibility reactivated.And heavy metal because out of soil, fundamentally being solved the problems, such as heavy metal pollution of soil by latter approach.
Chemical leaching method is exactly a kind of effective method for reducing heavy metal-polluted soil total amount.It makes weight using different digestion agents Metal moves to liquid phase from solid phase of soil, and achievees the purpose that reduce heavy metal-polluted soil by the discharge of leachate.Soil leaching The small area soil remediation for proposing technology serious pollution suitable for heavy metal, can achieve it is efficient to heavy metal-polluted soil, quickly go The purpose removed.Nevertheless, soil extract goes removing heavy metals to still have shortcoming at present, for example, soil extract was implemented Journey soil needs to move away from original position, soil extract contain a large amount of heavy metal needs be further processed and soil extract after soil The nutritional ingredients such as nitrogen, phosphorus and potassium can be lost.Above-mentioned deficiency will increase soil remediation cost and cause subsequent soil agricultural The problem of nutrient deficiency.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of restorative procedure of contaminated soil, extracts soil by situ In heavy metal, absorb the heavy metal in enrichment leaching liquor with water plant, the post-processing for solving soil extract leachates asks The problem of nutritional ingredients such as Soil Nitrogen, phosphorus and potassium can be lost after topic and soil extract.It is mentioned for the reparation of heavy-metal contaminated soil One has been supplied to open one's minds and approach.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of restorative procedure of contaminated soil, step include:
A, contaminated soil is dug out and in the heatable adobe sleeping platform that is backfilling into after Anti-seeping technology;
B, digestion agent and water are made into extracting solution to be added in contaminated soil, make soil pH between 5-6.5, and make molten Liquid is higher by soil surface 5-25cm, extracts Heavy Metals in Contaminated Soils;
C, by wetland plant plant in contaminated soil, and contaminated soil is made to be in water logging state, is harvested after 1 Growing season The plant of enriching heavy metal.
Anti-seeping technology step in the step A are as follows: the barrier film on contaminated soil surrounding ground pad, the pollution that will be dug out Soil is stacked on barrier film;The heatable adobe sleeping platform surrounding formed after digging out soil and bottom spread can natural degradation plastic film, The soil dug out is filled in heatable adobe sleeping platform again afterwards, and around heatable adobe sleeping platform build 0.5-1.0m high enclosure wall, can natural degradation plastics it is thin Film extends at the top of wall;
Digestion agent is organic acid and/or hydrochloric acid in the step B;The digestion agent is to analyze pure, the extracting solution prepared PH is 4-6;The organic acid is selected from one or more of citric acid, malic acid, acetic acid, tartaric acid;The extraction Polluted Soil The extraction time of heavy metal is 48-72h in earth, maintains soil liquid pH 5-6.5 constant during extraction;
Wetland plant is iris or water hyacinth in affiliated step C;Iris is yellow flag.
The beneficial effects of the present invention are:
The present invention develops a kind of soil extract connection for the deficiency of current chemical leaching method processing heavy-metal contaminated soil The method for closing wetland plant in-situ immobilization heavy metal-polluted soil is easy to engineering construction, environmental-friendly, while having following excellent Gesture:
1) it is handled using biodegradable films bed course, ensures soil in-situ extraction, saved soil landed cost.
2) leaching of soil containing heavy metal is solved using wetland plant synchronization process soil extract in soil extract process The problem of liquid post-processes out, while improving efficiency.
3) using saliferous organic acid or hydrochloric acid do not avoid inhibition of the leachate itself to plant growth as digestion agent.
4) this method plant soil restoration period is shorter, has at low cost, without secondary pollution, and plant is able to maintain water Soil increases soil fertility, and then accelerates the advantage of ecosystem self-regeneration, while reaching to soil weight by the harvest of plant The purpose that metal is thoroughly repaired.
Specific embodiment
Carry out further instruction combined with specific embodiments below.
Embodiment 1
The present invention is carried out for the soil that area is smaller, heavy metal pollution is more serious, first takes measures to utilize digestion agent Extraction in situ, it is rear to transplant wetland plant repairing heavy metal in soil.The implementation steps of the invention are as follows: step 1: first in contaminated soil Barrier film on surrounding ground pad, then according to heavy metal pollution depth and after repairing, the purposes of soil digs out contaminated soil, It digs out soil to be stacked on barrier film, prevents the pollution to Soil Surrounding.Step 2: the heatable adobe sleeping platform four formed after digging out soil Thermoplastic starch plastic film is spread in week and bottom, after the soil dug out is filled in heatable adobe sleeping platform again, and four at the top of heatable adobe sleeping platform Surrounding builds 0.5m high enclosure wall, and biodegradable plastic film extends at the top of wall to make antiseepage.Step 3: selecting lemon acidleach It proposes agent and water is made into the solution that pH is 4.5, solution is poured in the heatable adobe sleeping platform of landfill contaminated soil, make to extract soil pH in 5- Between 5.5, and solution is made to be higher by soil surface 10cm.Step 4: keeping soil extract process 48h, the soil liquid is during which maintained PH 5-5.5 is constant.Step 5: select acidproof and energy enriching heavy metal wetland plant yellow flag plant in extraction soil, the phase Between waterlogging state kept by addition heavy metal free polluted river water, pond water or tap water.Step 6: after 1 Growing season Plant is harvested, heatable adobe sleeping platform surrounding leakage proof wall is removed.
Contaminated soil after detection processing, heavy metal ions in soil Cr, Pb, Cu, Cd concentration by 5.67mg/Kg, 21.72mg/Kg, 11.43mg/Kg, 7.56mg/Kg are reduced to 0.51mg/Kg, 0.33mg/Kg, 1.12mg/Kg, 0.23mg/ respectively Kg。
Embodiment 2
The present invention is carried out for the soil that area is smaller, heavy metal pollution is more serious, first takes measures to utilize digestion agent Extraction in situ, it is rear to transplant wetland plant repairing heavy metal in soil.The implementation steps of the invention are as follows: step 1: first in contaminated soil Barrier film on surrounding ground pad, then according to heavy metal pollution depth and after repairing, the purposes of soil digs out contaminated soil, It digs out soil to be stacked on barrier film, prevents the pollution to Soil Surrounding.Step 2: the heatable adobe sleeping platform four formed after digging out soil Thermoplastic starch plastic film is spread in week and bottom, after the soil dug out is filled in heatable adobe sleeping platform again, and four at the top of heatable adobe sleeping platform Surrounding builds 0.5m high enclosure wall, and biodegradable plastic film extends at the top of wall to make antiseepage.Step 3: selection malic acid, Acetic acid, tartaric acid, HCl extract agent and water wiring solution-forming, malic acid, acetic acid, tartaric acid, hydrochloric acid solution pH value are 5-6;It will Solution is poured in the heatable adobe sleeping platform of landfill contaminated soil, makes to extract soil pH between 6-6.5, and solution is made to be higher by soil surface 10cm.Step 4: keeping soil extract process 60h, during which maintain soil liquid pH 6-6.5 constant.Step 5: selecting acidproof And can enriching heavy metal wetland plant water hyacinth plant in extraction soil in, during which by addition heavy metal free polluted river water, Pond water or tap water keep waterlogging state.Step 6: harvesting plant after 1 Growing season, heatable adobe sleeping platform surrounding cut-pff wall is removed Body.
Contaminated soil after detection processing, heavy metal ions in soil Cr, Pb, Cu, Cd concentration by 5.67mg/Kg, 21.72mg/Kg, 11.43mg/Kg, 7.56mg/Kg are reduced to 0.57mg/Kg, 0.46mg/Kg, 1.32mg/Kg, 0.34mg/ respectively Kg。

Claims (7)

1. a kind of restorative procedure of contaminated soil, step include:
A, contaminated soil is dug out and in the heatable adobe sleeping platform that is backfilling into after Anti-seeping technology;
B, digestion agent and water are made into extracting solution to be added in contaminated soil, make soil pH between 5-6.5, and make solution height Soil surface 5-25cm out extracts Heavy Metals in Contaminated Soils;
C, by wetland plant plant in contaminated soil, and contaminated soil is made to be in water logging state, harvests enrichment after 1 Growing season The plant of heavy metal.
2. restorative procedure as described in claim 1, it is characterised in that: Anti-seeping technology step in the step A are as follows: in Polluted Soil Barrier film on earth surrounding ground pad, the contaminated soil dug out is stacked on barrier film;The soil formed after digging out soil Hole surrounding and bottom spread can natural degradation plastic film, after the soil dug out is filled in heatable adobe sleeping platform again, and heatable adobe sleeping platform week Brick work 0.5-1.0m high enclosure wall, can natural degradation plastic film extend at the top of wall.
3. restorative procedure as described in claim 1, it is characterised in that: digestion agent is organic acid and/or salt in the step B Acid;Extracting solution pH is 4-6.
4. restorative procedure as claimed in claim 3, it is characterised in that: the organic acid be selected from citric acid, malic acid, acetic acid, One or more of tartaric acid.
5. restorative procedure as described in claim 1, it is characterised in that: the extraction time of the extraction Heavy Metals in Contaminated Soils For 48-72h, maintain soil liquid pH 5-6.5 constant during extraction.
6. restorative procedure as described in claim 1, it is characterised in that: in the step C wetland plant be iris or Water hyacinth.
7. restorative procedure as claimed in claim 6, it is characterised in that: the iris is yellow flag.
CN201610171376.8A 2016-03-22 2016-03-22 A kind of restorative procedure of contaminated soil Active CN105598144B (en)

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CN105945052B (en) * 2016-05-30 2020-10-27 青岛理工大学 Pb in-situ and ectopic coupling detoxification method for heavily polluted site
CN107446584B (en) * 2016-05-30 2021-06-25 青岛理工大学 Hexavalent chromium site in-situ and ex-situ coupling detoxification method based on biogas residues
CN106001087B (en) * 2016-05-30 2020-10-23 青岛理工大学 Hg in-situ and ectopic coupling detoxification method for heavily polluted site
CN105945056B (en) * 2016-05-30 2021-01-05 青岛理工大学 Heavy pollution site Cd in-situ and ex-situ coupling detoxification method based on biogas residues
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CN107695087A (en) * 2017-10-19 2018-02-16 福州清河源环保科技有限公司 A kind of method of restoration of the ecosystem heavy-metal contaminated soil
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CN109909292B (en) * 2019-02-27 2021-07-23 安徽农业大学 Method for repairing soil lead pollution by using enriched flower iris
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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0619764A1 (en) * 1991-10-03 1994-10-19 Cognis Inc Process for removing heavy metals from soils.
CN101279325A (en) * 2008-04-22 2008-10-08 华南农业大学 Method for repairing heavy metal polluted soil using combined technology of interacted plants and chemical leaching
CN102974602A (en) * 2012-11-27 2013-03-20 河海大学 Heavy metal polluted soil remediation device and method
CN102989754A (en) * 2012-12-20 2013-03-27 江苏省中国科学院植物研究所 Method for enhanced remediation of copper contaminated soil by using iris in combination with cutting measure
CN103111463A (en) * 2013-02-01 2013-05-22 深圳市先科环保有限公司 Remediation method of heavy metal contaminated soil
CN103203353A (en) * 2013-01-22 2013-07-17 华南农业大学 Method for restoring moderately Cd-contaminated soil by using vine and melon vegetables and light eluting agent
CN103357655A (en) * 2013-07-15 2013-10-23 南京农业大学 Composite chemical leaching method for remediation of heavy metal contaminated soil
CN104324934A (en) * 2014-11-20 2015-02-04 东莞市环境科学研究所 Ecological remediation device and method for electroplating waste land polluted soil
CN104550207A (en) * 2013-10-12 2015-04-29 南京科盛环保科技有限公司 Novel method for metal-polluted soil restoration by plant
CN104607453A (en) * 2015-02-02 2015-05-13 陕西科技大学 Reinforced plant restoration method for lead-cadmium composite contaminated soil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002307048A (en) * 2001-04-16 2002-10-22 Mitsubishi Materials Corp Soil cleaning method and soil cleaning apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0619764A1 (en) * 1991-10-03 1994-10-19 Cognis Inc Process for removing heavy metals from soils.
CN101279325A (en) * 2008-04-22 2008-10-08 华南农业大学 Method for repairing heavy metal polluted soil using combined technology of interacted plants and chemical leaching
CN102974602A (en) * 2012-11-27 2013-03-20 河海大学 Heavy metal polluted soil remediation device and method
CN102989754A (en) * 2012-12-20 2013-03-27 江苏省中国科学院植物研究所 Method for enhanced remediation of copper contaminated soil by using iris in combination with cutting measure
CN103203353A (en) * 2013-01-22 2013-07-17 华南农业大学 Method for restoring moderately Cd-contaminated soil by using vine and melon vegetables and light eluting agent
CN103111463A (en) * 2013-02-01 2013-05-22 深圳市先科环保有限公司 Remediation method of heavy metal contaminated soil
CN103357655A (en) * 2013-07-15 2013-10-23 南京农业大学 Composite chemical leaching method for remediation of heavy metal contaminated soil
CN104550207A (en) * 2013-10-12 2015-04-29 南京科盛环保科技有限公司 Novel method for metal-polluted soil restoration by plant
CN104324934A (en) * 2014-11-20 2015-02-04 东莞市环境科学研究所 Ecological remediation device and method for electroplating waste land polluted soil
CN104607453A (en) * 2015-02-02 2015-05-13 陕西科技大学 Reinforced plant restoration method for lead-cadmium composite contaminated soil

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