CN107639107A - A kind of restorative procedure that can reduce heavy metal in soil total amount - Google Patents
A kind of restorative procedure that can reduce heavy metal in soil total amount Download PDFInfo
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Abstract
The invention discloses a kind of restorative procedure that can reduce heavy metal in soil total amount, and the activator containing surfactant is pressed and soil volume ratio 1 ~ 3:1 is applied in soil, heavy metal is departed from from soil particle；Again by porous material by the volume ratio 2 with soil:1~1:3 add in soil, mix, metallic element is adsorbed onto porous material surface；Finally by screening or Magnetic Isolation, porous material is separated with soil.The restorative procedure of this law disposably can reduce or remove to lead present in soil or sludge, cadmium, arsenic, zinc, cobalt, chromium etc., can avoid the risk for causing heavy metal to discharge again because of soil environmental background value.
Description
Technical field
The present invention relates to environmental protection technical field, more particularly to heavy metal-polluted soil removes, solid repair materials heavy metal
Transfer, the separation field of attachment heavy metal material, and in particular to a kind of restorative procedure that can reduce heavy metal in soil total amount.
Background technology
Heavy metal in soil has non-biodegradable and cumulative characteristic, and the reparation of current soil heavy metal is to use mostly
Curing/stabilizing technology, it is to apply chemical agent or physical absorbent into soil, can by reducing metal migration and biology
Usability reaches the purpose reduced to organism harm.However, heavy metal in soil is not reduced or is removed, when environment shape
When condition changes, such as the change of soil acidity or alkalinity, can make to have been cured/stabilized heavy metal discharges and endangers animals and plants once again
Health and human-body safety.The administering method of heavy metal in soil total amount is reduced, can fundamentally solve heavy metal pollution problem.
At present, the recovery technique that can reduce heavy metal in soil total amount mainly has phytoremediation, elution method, electrochemistry
Method.Plant method is plantation heavy metal super-enriched plant, by the way that Metal uptake is enriched in plant, collects plant and does further
Processing, it is adapted to farmland to repair, but it is time-consuming longer.Elution method is with certain liquid, including acid, alkali, salt, surfactant, complexing
Or the solution such as chelating agent, heavy metal in soil is transferred in the soil liquid and elutes removal, easily causes secondary pollution, leacheate needs
After-treatment is done again, and the soil texture after elution can change, and cost is higher.Electrochemical process is to make a huge sum of money in the soil liquid
Belong to ion displacement, by enrichment and the method that is removed, there is certain requirement to soil permeability, cost is also larger.Nothing
By what above-mentioned method, there is certain limitation.
The content of the invention
It is high it is an object of the invention to provide a kind of remediation efficiency and environment amenable to reduce heavy metal in soil total
The method of the soil remediation of amount.The purpose of the present invention is achieved through the following technical solutions：
A kind of restorative procedure that can reduce heavy metal in soil total amount, comprises the following steps：
1）Activator is pressed and soil volume ratio 1 ~ 3:1 is applied in soil, keeps soil moisture content to be more than 45%, mixes,
Heavy metal is set to depart from from soil particle, the composition of the activator includes biosurfactant and solubilizer；
2）By porous material by the volume ratio 2 with soil:1~1:3 add with the soil after activator effect, mixing, making
Metallic element is adsorbed onto porous material surface, and iron content is more than 5% in the composition of the porous material；
3）By screening or Magnetic Isolation, porous material is separated with soil.
Further, the biosurfactant is glycolipid, glucosides, cellulose, phytic acid, soya-bean oil, saponin, dextrin, shallow lake
Any one or a few in powder, lignin mixes composition with water, and the other compositions in biosurfactant are total than water
It is 0.01% ~ 2% to measure the content in activator；The solubilizer is sodium hydroxide, ammoniacal liquor, potassium hydroxide, hypochlorite, chlorination
Any one or a few in calcium, phosphoric acid, citric acid, acetic acid, hydrochloric acid, ammonium salt；Concentration range of the solubilizer in activator be
0.01%~35%；The pH value of the activator is 7 ~ 10, and the surface tension value of the activator is 15 ~ 45mN/m.
Further, the critical micelle concentration of the activator is：50-250mg/L.
Further, the preparation method of porous material is：Host material, pore creating material are mixed with iron-based material, and add water
By mould molding, 25-80 DEG C of temperature is dried, 400 DEG C of -800 DEG C of sintering, then is obtained with organic acid effect 5min ~ 2h described
Porous material；The iron-based material accounts for more than the 15% of porous material gross mass, and the host material is bentonite, sodium silicate, sulphur
It is one or more of in choline, silica flour, calcite, gypsum, lime, cement, clay, diatomite, sepiolite, slag, coal dust；Institute
Iron-based material is stated to be one or more of in iron, iron oxide or iron ore, iron content is more than 48% in iron-based material.
Further, the pore creating material is a kind of in ammonium hydrogen carbonate, polyvinyl alcohol, lignin, Tea Saponin, carboxymethyl cellulose
Or it is several, the pore creating material quality is the 5%-20% of substrate material quality.
Further, organic acid is a kind or several in humic acid, xylonic acid, acetic acid, and the concentration of organic acid is 0.02%-
2.0%
Further, by step 3）The porous material obtained after separation, by acid elution or immersion treatment, renewable circulation profit
With；The acid that acid elution uses is any one in hydrochloric acid, acetic acid, nitric acid, sulfuric acid, acid concentration 0.1-1mol/L.
The beneficial effects of the invention are as follows：
The present invention destroys heavy metal and soil using activator and the soil restoring technology of porous material collection with heavy metallic activation agent
The adhesion of earth, promote heavy metal to depart from from soil particle, aoxidized using porous material and soil or Heavy Metals in Sludge
Reduction, network（Chela）The chemical reaction such as conjunction, porous material surface is adsorbed onto by metallic element, will be more by screening or Magnetic Isolation
Porous materials separate with soil or sludge, soil or Heavy Metal Level In Sludge is minimized or is removed, substantially increase removing
Efficiency；Lead present in soil or sludge, cadmium, arsenic, zinc, cobalt, chromium etc. disposably can be reduced or removed, can avoid because of soil ring
The risk that border changes and causes heavy metal to discharge again.
Activator disclosed by the invention, matched according to heavy metal species and content contained by different contaminated soils or sludge
Adjust, individually can be mixed with soil with concentration, for removing the heavy metal in soil, and functioning efficiency is high, safety non-pollution.
Embodiment
Embodiment 1
A kind of soil remediation method that can reduce heavy metal in soil total amount, comprises the following steps：
1）Activator is pressed and soil volume ratio 1 ~ 3:1 is applied in soil, keeps soil moisture content to be more than 45%, mixes,
Heavy metal is set to depart from from soil particle, the composition of the activator includes biosurfactant and solubilizer；
2）By porous material by the volume ratio 2 with soil:1~1:3 add in soil, mix, are adsorbed onto metallic element more
Porous materials surface, iron content is more than 5% in the composition of the porous material；
3）By screening or Magnetic Isolation, porous material is separated with soil.
4）Step 3）The porous material obtained after separation, it is renewable to recycle by acid elution or immersion treatment；Acid leaching
The acid used is washed as any one in hydrochloric acid, acetic acid, nitric acid, sulfuric acid, acid concentration 0.1-1mol/L.
Wherein：Biosurfactant is glycolipid, glucosides, cellulose, phytic acid, soya-bean oil, saponin, dextrin, starch, lignin
In any one or a few composition is mixed with water, the other compositions total amount in biosurfactant is in activator than water
In content be 0.01% ~ 2%；The solubilizer is sodium hydroxide, ammoniacal liquor, potassium hydroxide, hypochlorite, calcium chloride, phosphoric acid, lemon
Any one or a few in lemon acid, acetic acid, hydrochloric acid, ammonium salt；Concentration range of the solubilizer in activator is 0.01% ~ 35%；Institute
The pH value for stating activator is 7 ~ 10, and the surface tension value of the activator is 15 ~ 45mN/m；The critical micell of the activator is dense
Spend and be：50-250mg/L.
Wherein, the preparation method of porous material is：Host material, pore creating material are mixed with iron-based material, and add water to pass through
Mould molding, 25-80 DEG C of temperature are dried, 400 DEG C of -800 DEG C of sintering, then are obtained with organic acid effect 5min ~ 2h described porous
Material；The iron-based material accounts for more than the 15% of porous material gross mass, and the host material is bentonite, sodium silicate, vulcanization
It is one or more of in alkali, silica flour, calcite, gypsum, lime, cement, clay, diatomite, sepiolite, slag, coal dust；It is described
Iron-based material is one or more of in iron, iron oxide or iron ore, and iron content is more than 48% in iron-based material.Pore creating material is carbonic acid
One or more of in hydrogen ammonium, polyvinyl alcohol, lignin, Tea Saponin, carboxymethyl cellulose, the pore creating material quality is host material matter
The 5%-20% of amount.Organic acid is a kind or several in humic acid, xylonic acid, acetic acid, and the concentration of organic acid is 0.02%-2.0%.
Embodiment 2
The present embodiment is the improvement carried out on the basis of embodiment 1, and part same as Example 1, please join in the present embodiment
Understood according to the content disclosed in embodiment 1, the disclosure of embodiment 1 should also be as the content as the present embodiment, herein
It is not repeated description.
Cd and Pb contents are respectively 265.75mg/kg and 5912.5mg/kg in the soil of place.Activator is pressed and soil mass
Product ratio 2：1 adds soil（Surfactant wherein in activator is mixed with water and formed by glycolipid, lignin, soya-bean oil；Glycolipid,
Lignin, the total amount of soya-bean oil account for the 0.05% of activator）, soil wetting is caused, is stirred 30 minutes, porous material is pressed and soil mass
Product ratio 1：2 additions, mixing, then stir, 30 minutes, sieve, take Soil K+adsorption.Cd and Pb contents are respectively in surfactant
103.3mg/kg and 3345.2 mg/kg, Cd and Pb total amounts reduce by 61.1% and 43.4% in soil
Embodiment 3
The present embodiment is the improvement carried out on the basis of embodiment 1, and part same as Example 1, please join in the present embodiment
Understood according to the content disclosed in embodiment 1, the disclosure of embodiment 1 should also be as the content as the present embodiment, herein
It is not repeated description.
Cu, Zn and As content are respectively 2248.75mg/kg, 27475 mg/kg and 948.25 mg/kg in soil.Take work
Agent 10ml（Activator is containing 20% phosphoric acid, 0.1% phytic acid, 0.01% glycolipid）, add in 10g soil, agitation, by solid porous material
Material is (in porous material：Iron-based material 85%, carbon 2%, ammonium hydrogen carbonate 10%, polyvinyl alcohol 3%) press and soil volume ratio 1：1 is added to
In soil, stir 20 minutes, by Magnetic Isolation, porous material is taken out, takes Soil K+adsorption, Cu, Zn and As content are respectively
1039.5mg/kg, 13185mg/kg and 381mg/kg, clearance are respectively 53.8%, 52% and 59.8%.
Embodiment 4
The present embodiment is the improvement carried out on the basis of embodiment 1, and part same as Example 1, please join in the present embodiment
Understood according to the content disclosed in embodiment 1, the disclosure of embodiment 1 should also be as the content as the present embodiment, herein
It is not repeated description.
By lead and the soil 5g of cadmium pollution, activator 10mL is added,（The preparation of activator：10 mL are taken to contain 0.02% sandlwood
Glycolipid, with 0.1 molL-1 Acetic acid and ammoniacal liquor adjustment pH be 9）, mixing vibration stirring 10 minutes, porous material is added, is made
After a period of time, porous material is separated, cadmium clearance is up to 89.5% in soil, and lead clearance is up to 81%.The original of porous material
Material includes clay, sepiolite and iron.The porous material of taking-up soaks 5 minutes in 0.1mol/L hydrochloric acid and regenerated.
Embodiment 5
The present embodiment is the improvement carried out on the basis of embodiment 1, and part same as Example 1, please join in the present embodiment
Understood according to the content disclosed in embodiment 1, the disclosure of embodiment 1 should also be as the content as the present embodiment, herein
It is not repeated description.
By lead and the soil 5g of cadmium pollution, activator 10ml is added（Activator containing 0.01% rhamnolipid, 0.02% glucosides,
0.01% soya-bean oil, it is 8.5 with sodium hydroxide, ammoniacal liquor and lemon acid for adjusting pH）, vibrate 10 minutes, add porous material, porous material
The absorption and regeneration of material operate similarly to Example 4.Cadmium clearance is up to 88%, and lead clearance is up to 91%.
Claims (7)
- A kind of 1. restorative procedure that can reduce heavy metal in soil total amount, it is characterised in that：Comprise the following steps：1）Activator is pressed and soil volume ratio 1 ~ 3:1 is applied in soil, keeps soil moisture content to be more than 45%, mixes, Heavy metal is set to depart from from soil particle, the composition of the activator includes biosurfactant and solubilizer；2）By porous material by the volume ratio 2 with soil:1~1:3 are added in the soil after being acted on activator, mix, Metallic element is set to be adsorbed onto porous material surface, iron content is more than 5% in the composition of the porous material；3）By screening or Magnetic Isolation, porous material is separated with soil.
- 2. restorative procedure according to claim 1, it is characterised in that：The biosurfactant is glycolipid, glucosides, fibre Any one or a few in dimension element, phytic acid, soya-bean oil, saponin, dextrin, starch, lignin mixes composition with water, gives birth to than water Content of the other compositions total amount in activator in thing surfactant is 0.01% ~ 2%；The solubilizer be sodium hydroxide, Any one or a few in ammoniacal liquor, potassium hydroxide, hypochlorite, calcium chloride, phosphoric acid, citric acid, acetic acid, hydrochloric acid, ammonium salt；Solubilising Concentration range of the agent in activator is 0.01% ~ 35%；The pH value of the activator is 7 ~ 10, the surface tension of the activator It is worth for 15 ~ 45mN/m.
- 3. restorative procedure according to claim 2, it is characterised in that：The critical micelle concentration of the activator is：50- 250mg/L。
- 4. restorative procedure according to claim 1, it is characterised in that：The preparation method of porous material is：By host material, Pore creating material mixes with iron-based material, and adds water to be dried by mould molding, 25-80 DEG C of temperature, 400 DEG C of -800 DEG C of sintering, then The porous material is obtained with organic acid effect 5min ~ 2h；The iron-based material accounts for more than the 15% of porous material gross mass, institute It is bentonite, sodium silicate, akali sulphide, silica flour, calcite, gypsum, lime, cement, clay, diatomite, sea to state host material It is one or more of in afrodite, slag, coal dust；The iron-based material is one or more of in iron, iron oxide or iron ore, iron-based material Iron content is more than 48% in material.
- 5. restorative procedure according to claim 4, it is characterised in that：The pore creating material is ammonium hydrogen carbonate, polyvinyl alcohol, wood One or more of in quality, Tea Saponin, carboxymethyl cellulose, the pore creating material quality is the 5%-20% of substrate material quality.
- 6. restorative procedure according to claim 4, it is characterised in that：Organic acid is a kind in humic acid, xylonic acid, acetic acid Or it is several, the concentration of organic acid is 0.02%-2.0%.
- 7. restorative procedure according to claim 1, it is characterised in that：By step 3）The porous material obtained after separation, It is renewable to recycle by acid elution or immersion treatment；The acid that acid elution uses is appointing in hydrochloric acid, acetic acid, nitric acid, sulfuric acid Meaning is a kind of, acid concentration 0.1-1mol/L.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108359475A (en) * | 2018-03-03 | 2018-08-03 | 湖南科技大学 | A kind of humic-acid kind heavy metal-polluted soil renovation agent and its preparation method and application |
| CN108906875A (en) * | 2018-07-05 | 2018-11-30 | 安徽袁粮水稻产业有限公司 | A kind of method for comprehensive repairing of lead contamination rice soil |
| CN108971211A (en) * | 2018-07-05 | 2018-12-11 | 安徽袁粮水稻产业有限公司 | A kind of method for comprehensive repairing of nickel contamination rice soil |
| CN109943339A (en) * | 2019-04-18 | 2019-06-28 | 江苏爱佳福如土壤修复有限公司 | A kind of soil conditioner of Silicon-rich and the preparation method and application thereof |
| CN109985899A (en) * | 2019-04-30 | 2019-07-09 | 武夷学院 | A kind of soil remediation method of heavy metal pollution |
| CN110293120A (en) * | 2019-07-10 | 2019-10-01 | 广东粤风环保有限公司 | A kind of method of restoration of soil polluted by heavy metal |
| CN110293121A (en) * | 2019-07-10 | 2019-10-01 | 广东粤风环保有限公司 | A kind of method of in-situ immobilization contaminated soil |
| CN110976506A (en) * | 2019-12-20 | 2020-04-10 | 纳琦绿能工程有限公司 | Curing and stabilizing repairing agent for polluted soil and repairing method thereof |
| CN111018094A (en) * | 2019-12-26 | 2020-04-17 | 南京公诚节能新材料研究院有限公司 | Preparation method of light biological filter material |
| CN111036661A (en) * | 2019-03-28 | 2020-04-21 | 红河学院 | Method for adsorbing heavy metal arsenic in soil by filling stainless steel grating with magnetic cellulose microspheres |
| CN112322304A (en) * | 2020-11-13 | 2021-02-05 | 浙江正峰生态环境工程有限公司 | Passivator and passivation method for soil heavy metal pollution treatment |
| CN112808242A (en) * | 2021-01-06 | 2021-05-18 | 核工业西南勘察设计研究院有限公司 | Magnetic repairing agent and preparation method and application thereof |
| CN113369297A (en) * | 2021-07-07 | 2021-09-10 | 广州华景建设有限公司 | Method for restoring soil for planting garden plants |
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| CN108359475A (en) * | 2018-03-03 | 2018-08-03 | 湖南科技大学 | A kind of humic-acid kind heavy metal-polluted soil renovation agent and its preparation method and application |
| CN108906875A (en) * | 2018-07-05 | 2018-11-30 | 安徽袁粮水稻产业有限公司 | A kind of method for comprehensive repairing of lead contamination rice soil |
| CN108971211A (en) * | 2018-07-05 | 2018-12-11 | 安徽袁粮水稻产业有限公司 | A kind of method for comprehensive repairing of nickel contamination rice soil |
| CN111036661A (en) * | 2019-03-28 | 2020-04-21 | 红河学院 | Method for adsorbing heavy metal arsenic in soil by filling stainless steel grating with magnetic cellulose microspheres |
| CN109943339A (en) * | 2019-04-18 | 2019-06-28 | 江苏爱佳福如土壤修复有限公司 | A kind of soil conditioner of Silicon-rich and the preparation method and application thereof |
| CN109943339B (en) * | 2019-04-18 | 2021-01-26 | 江苏爱佳福如土壤修复有限公司 | Silicon-rich soil conditioner and preparation method and application thereof |
| CN109985899B (en) * | 2019-04-30 | 2021-08-31 | 武夷学院 | Heavy metal contaminated soil treatment method |
| CN109985899A (en) * | 2019-04-30 | 2019-07-09 | 武夷学院 | A kind of soil remediation method of heavy metal pollution |
| CN110293120A (en) * | 2019-07-10 | 2019-10-01 | 广东粤风环保有限公司 | A kind of method of restoration of soil polluted by heavy metal |
| CN110293121A (en) * | 2019-07-10 | 2019-10-01 | 广东粤风环保有限公司 | A kind of method of in-situ immobilization contaminated soil |
| CN110976506A (en) * | 2019-12-20 | 2020-04-10 | 纳琦绿能工程有限公司 | Curing and stabilizing repairing agent for polluted soil and repairing method thereof |
| CN111018094A (en) * | 2019-12-26 | 2020-04-17 | 南京公诚节能新材料研究院有限公司 | Preparation method of light biological filter material |
| CN112322304A (en) * | 2020-11-13 | 2021-02-05 | 浙江正峰生态环境工程有限公司 | Passivator and passivation method for soil heavy metal pollution treatment |
| CN112808242A (en) * | 2021-01-06 | 2021-05-18 | 核工业西南勘察设计研究院有限公司 | Magnetic repairing agent and preparation method and application thereof |
| CN113369297A (en) * | 2021-07-07 | 2021-09-10 | 广州华景建设有限公司 | Method for restoring soil for planting garden plants |
| CN113369297B (en) * | 2021-07-07 | 2022-07-15 | 广州华景建设有限公司 | Method for restoring soil for planting garden plants |
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