CN107497847A - One kind of multiple heavy-metal contaminated soil ecological restoring methods and application - Google Patents
One kind of multiple heavy-metal contaminated soil ecological restoring methods and application Download PDFInfo
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- CN107497847A CN107497847A CN201710870283.9A CN201710870283A CN107497847A CN 107497847 A CN107497847 A CN 107497847A CN 201710870283 A CN201710870283 A CN 201710870283A CN 107497847 A CN107497847 A CN 107497847A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
Abstract
One kind of multiple heavy-metal contaminated soil ecological restoring methods and application, the technology belong to field of environment protection.The technology is realized by following steps：There is the addition Cosan of mass percent 0.1 3% in various heavy contaminated soil at the same time, 0.1% potassium sulfite, 0.1 5% potassium thiosulfate, 2 30% stalks, 1 30% calcium polysulfide etc., pH is adjusted 57, soil moisture content is kept to reach 60 100%, thoroughly mix soil thoroughly, surrounding plastic covering diaphragm seal, or hold in ceramics or plastic containers, covering, stir within one week or so stirring once, after 35 times, can be by such as Pb of the various heavy in contaminated soil, Cd, Cr, Cu, Ni, Mn, Hg, Ag, Fe, largely solidification precipitates (99% is cured above) to Zn etc., so as to reduce the leaching of these heavy metals, reduce the bioactivity and solubility of heavy metal, eliminate heavy metal pollution of soil, environmental protection.
Description
Technical field
The invention belongs to field of environment protection, more particularly to one kind of multiple heavy-metal contaminated soil ecological restoring methods and should
With.
Background technology
Heavy metal refers to metal of the relative density more than 5, about 45 kinds, including copper (Cu), lead (Pb), zinc (Zn), tin
(Sn), nickel (Ni), cobalt (Co), antimony (Sb), mercury (Hg), cadmium (Cd) and bismuth (Bi) etc..Arsenic (As) though heavy metal is not belonging to, because of it
Source and harm are all similar to heavy metal, therefore are generally included in heavy metal classes and carry out research discussion.
As the exploitation of mankind's heavy metal, smelting, processing and business manufacturing activities are increasing, the use of heavy metal is got over
Come wider, heavy metal pollution is also increasingly severe, and heavy metal is listed in first pollution thing in countries in the world, and heavy metal environment is dirty
Dye turns into a very urgent world subject.
It is heavy metal-polluted to have a finger in every pie the environmental pollution as caused by heavy metal or its compound.Mainly by mining, waste gas discharge, sewage
Irrigate and using huge sum of money metal products et al. caused by factor.Essentially from agricultural chemicals, waste water, sludge and atmospheric sedimentation etc., such as mercury master
To come from mercury-containing waste water, cadmium, lead contamination essentially from smelting discharge and automobile exhaust gas sedimentation, arsenic be then widely used as insecticide,
Bactericide, rat poison and herbicide.Cause the content of beary metal in environment to increase because of mankind's activity, beyond normal range (NR), and lead
Environmental quality is caused to deteriorate.The pollution main source industrial pollution of heavy metal, next to that traffic pollution and living garbage pollution.Industry
Pollution is discharged into environment by waste residue, waste water, waste gas mostly, is enriched with humans and animals, plant, so as to the health to environment and people
Very big harm is caused, the improvement of industrial pollution can reduce its pollution by some technical methods, control measures, finally
Reach the pollutant emission standard of country；Traffic pollution is mainly the discharge of vehicle exhaust, and country has formulated a series of management
Method, such as：Use ethanol petrol, installation automobile exhaust purifier etc.；Domestic pollution is mainly the pollution of some house refuses,
Old and useless battery, broken illuminating lamp, unspent cosmetics, the dishes etc. of upper colored glaze, if pollution for heavy metal I
Be controlled by from its source, just can more or less reduce heavy metal pollution.
The damage ratio of water body and air is more directly perceived, can be found by the sense organ of people when serious：And soil pollution is then often
To include the health status of grain, veterinary antibiotics or herbage and the human or animal to ingest by crops can just reflect,
There is a considerably long progressively cumulative process from by generation disastrous effect is polluteed, there is disguised or latency.The second of Japan
Nuisance disease --- itai-itai betides Fushan Mountain county remarkable ability river basin the sixties, until it is cadmium pollution soil that the seventies just confirms substantially
Caused by " cadmium rice " that is produced.The biological agent of Mobility of Heavy Metals In Soil Environment, it is primarily referred to as plant and is inhaled by root system from soil
The heavy metal of some chemical forms is received, and accumulation is got up in plant, this migration had both been regarded as plant to the net of soil
Change, be also regarded as harm of the contaminated soil to plant.Cumulative heavy metal substance can by the relation of food chain,
It is delivered to the top layer of food chain step by step, that is, our mankind, so amount cumulative in mankind's body also just turn into plant
Internal several times, more than ten times even tens times, this biological magnification namely in nature.
Soil extremely difficult recovery Yi Dan polluted, pollution of the heavy metal element to soil are an irreversible procedures, and
The pollution of many organic chemicals is also required to a long degradation time, such as spring 1977 Winter Solstice in 1966, Shenyang
Oil, phenols and the cadmium pollution for opening native irrigated area later that Fushun Irrigation District of Sewage occurs, cause the soil of large area to poison, rice
Dwarfing, rice peculiar smell, cadmium content exceed food hygienic standard.By the painstaking efforts in more than ten years, including apply modifying agent, depth
Turn over, the various measures such as filling, soil moved in improve the original, selection kind clearly, just progressively recover its part producing power, paid substantial amounts of labour and Dai
Valency.
Since 2008, over one hundred significant pollution accident, including the heavy metal pollution accident such as arsenic, cadmium, lead have occurred for the whole nation
Up to more than 30.The contamination accident frequently broken out is suffered heavy losses, and not only increases enviromental protection and improvement cost, also make social stability into
Originally increase, and the expense needed for soil pollution reparation is even more sky-high price.The aggravation of pollution causes the beneficial bacterium in soil largely to reduce,
Soil quality declines, and self-purification capacity weakens, and influences the yield and quality of crops, is detrimental to health, or even environment report occurs
Multiple risk.First, ecological relationship is unbalance, cause the deterioration of the ecological environment.Due to the disguise or latency of soil pollution and it
Irreversibility or chronicity, thus endanger often through food chain the health of animal and human body.Research shows, soil and grain
Pollution and some Area Inhabitants hepatomegaly between have an obvious dose-response relationship, dirt fill caused by pollute more serious, people
The hepatomegaly string of group is higher.Soil can be remained in soil the long period after heavy metal pollution, it is difficult to is eliminated, during residual
Between it is long, damaging effect is big, endangers human and livestock health into food chain after crop absorbs.It is disguised strong into the pollutant of soil,
It is difficult to eliminate again, therefore, soil pollution is often ignored by people, causes bigger harm.
China there are about 1.3 ten thousand hm2Plough by cadmium pollution, be related to 25 areas of 11 provinces and cities.Ministry of Agriculture's agricultural environment
Monitoring master station monitoring result shows that irrigating region cadmium pollution area is maximum, up to 381.2 ten thousand hm2, account for heavy metals exceeding standard area 56.9%
Irrigating region production agricultural product cadmium exceeding standard rate up to 10.2%.In human body, the long half time of cadmium up to 73 years, accumulation 50 years it
Long, can be to a variety of organs and tissue damage.The toxicity of different valence state chromium is different, study various valence state chromium toxicity and
Its damage to biology.Into the cadmium of human body, it can be combined with the protein molecule of hydroxyl, amino, sulfydryl, suppress a variety of enzymes
Activity, so as to influence liver, kidney organ normal function.In addition, cadmium poisoning can also to immune system, urinary system, nervous system,
Bone tissue growth and reproductive system etc. cause larger infringement.China typical case cadmium pollution event has：(1) Guangxi Longjiang river cadmium pollution thing
Part；(2) Hunan Hunan and chemical plant cadmium pollution event；(3) Xiang River Xia Wan ports dredging governance engineering cadmium pollution event；(4) Guang Dongbei
River cadmium pollution event；(5) the exceeded event of rice cadmium pollution.
With developing rapidly for global economy, the pollutant containing heavy metal enters soil by all means, causes soil
Earth seriously pollutes.Heavy metal pollution of soil can influence the decline of Crop yield and quality, and can endanger the mankind by food chain
Health, the further deterioration of air and quality of water environment can also be caused.Therefore the extensive attention of countries in the world is caused.Mesh
Before, there is different degrees of heavy metal pollution in countries in the world soil, t, the Cu about 340 of Hg about 1.5 ten thousand is discharged in the whole world every year on average
About 15,000,000 about 1,000,000 t of t, Ni of t, Mn of ten thousand t, Pb about 5,000,000.The metropolitan Vegetable Base of north of China and part commodity food base
Ground is there is also different degrees of heavy metal pollution, such as Beijing, Tianjin, Xi'an, Shenyang, Jinan, Changchun, Zhengzhou etc..Southern phase
To relatively light, such as Foochow, Ningbo, Shanghai, Wuhan, Chengdu etc..
Heavy metal pollution of soil will cause the heavy damage of the ecosystem.In terms of Chinese soil resource situation, to 2010
China per capita cultivated land will be only 0.1hm in the end of the year2, and with China's economic from now on social development such as biologic rescue, the structure of agricultural production
Adjustment and natural calamity damage etc., soil resource will be further reduced.Thus how to efficiently control and administer heavy metal-polluted soil
Pollution, improved soil quality, will turn into Eco-environmental Protection Works in a highly important content.
2016, national environmental protection portion approved《Soil Pollution Control action plan》,《Soil Pollution Control row
Dynamic plan》It is the huge engineering of a scale of investment, also will will be a long-term engineering, will just have step, and progressively implement stage by stage.
With implementing for 6 soil protections and the emphasis demonstration area project of pollution control, the acceleration of China's soil pollution reparation will be promoted
Development.Due to heavy metal pollution of soil thing strong toxicity, do not move, crypticity is strong, may be along food chain after being taken in by organism
Concentration amplification, some of organic pollutions have carcinogenic, teratogenesis, mutagenicity, and some also has endocrine, right
Human and animal's harm is very big.Heavy metal pollution of soil soil remediation will progressively turn into the emphasis of soil remediation.Soil should be said
Wide market is repaired, and heavy metal pollution of soil reparation will increasingly be taken seriously.But although future market space
It is huge, due to the soil remediations such as the shortage of soil remediation Its Relevant Technology Standards and basic data implement many difficulties, in recent years
Interior, China's Soil Pollution Control also needs to first pass through pilot demonstration and the local process carried out, then realize scale development.Basis
Data and repair experience accumulation and recovery technique deposit by be China's current stage soil remediation vital task.
On the research of heavy metal pollution of soil thing, foreign countries start from 60~seventies of 20th century, such as Australia, the U.S.,
The country such as Germany is more deep to heavy metal-polluted soil, especially Australian.China holds in nineteen eighty-three to major type of soil environment
Amount made Primary Study, such as proposed ecological effect, critical content zonal differentiation rule and the subregion of research heavy metal-polluted soil.
At present, the general principle of remediation of heavy metal-contaminated soil mainly has solidification and activation, around this
Two aspects, correspondingly propose physics, chemistry and bioremediation technology.
The Treatment process of soil mainly has physics Treatment process, chemical harnessing technology, microbial treatment technology, plant in treating
Technology etc. is several.Soil organic contamination technology is common to be had：1 physics Treatment process 1.1 excavation landfill method, 1.2 ventilation decontamination methods, 2
2.1 chemical burning method of Chemo-Therapy logos, 2.2 chemical cleaning methods, 2.2.1 surfactant washing methods, 2.2.2 organic solvents are clear
Method is washed, 2.2.3 supercritical extractions, 2.3 photochemical degradating methods, the 2.4 chemical anti-therapies of grid, 3 microbial treatment methods, 3.1 is former
Position administering method 3.1.1 throwing bacterium methods, 3.1.2 biological culture methods, 3.1.3 bioventing processes, 3.1.4 agro-farming methods, 3.2 dystopys are controlled
The prefabricated bed process of logos 3.2.1,3.2.2 composting processes, 3.2.3 bioreactor methods, 3.2.4 Anaerobic Treatment methods, 4 plant in treating sides
Method, 4.1 be direct absorption of the plant to organic pollution；4.2 be the activity that the secretion of Plant emission and enzyme stimulate microorganism
Strengthen its biotransformation, some enzymes also can direct decomposing organic pollutant in addition；4.3 be plant roots area and its symbiosis therewith
Flora enhancing root area organic matter mineralization.
These methods respectively have advantage and disadvantage, and are mostly used in water pollution control, and the remediation contaminated soil for large area is also
Seldom, because cost is too high, there is secondary pollution, while it is not thorough to administer removal.
This technology synthesis is using ecological approach such as electronation, living things catalysis, biological reducing technologies, for a soil huge sum of money
Belong to the solidification and passivation of pollution, cost is low, and the reaction time is moderate, and reduction curing is thorough, and last various heavy generates solubility product
Extremely low heavy metal sulfide, few secondary pollution material, treatment effeciency is high, and environment friendly is high, easy to operate, easily realizes
Heavy industrialization application.
The content of the invention
The technical problem of solution：The present invention is directed to heavy metal pollution of soil, particularly chemical plant place and bed mud in river weight
Metallic pollution, it is comprehensive using physics, chemistry, biology, biochemical enzymes reaction technology etc., within a short period of time soil pollution heavy metal
Most thoroughly precipitate reductions are solidified into metal sulfide, so as to remove harm of the heavy metal-polluted soil to environment and the mankind.
8th, technical scheme：One kind of multiple heavy-metal contaminated soil restorative procedures and application, step are：A. by heavy metal pollution
Soil is dug out, and is stacked in cement flooring or plastics/ceramic vessel, first with 0.1-4mol/L NaOH and/or 0.1-4mol/L HCl
First adjust contaminated soil pH and surround whole heap soil with solid plastic tent in 5-7, outside, or in closed Large Copacity trucd mixer
Or carried out in agitator tank so that whole heavy metal pollution processing procedure is carried out in closed space；By mass/mass ratio 1000
0.1-5%K is added in kilogram heavy-metal contaminated soil2SO3, 0.1-5%K2S2O3, 1-30% calcium polysulfides, it is some to stir soil
It is secondary, or stirring soil, mix thoroughly, it is standby；B. in the plant straw powder double centner of particle diameter 80-300 mesh, 30-60 kilograms is added
Clean water, mix thoroughly, add 500-1000U/ kilograms of cellulase by unit of enzyme activity's U/ mass ratioes, mix thoroughly, stir or stir daily
Mix once, quiescent culture 5-7 days is standby；C. in the starch powder double centner of particle diameter 100-300 mesh, 40-80 kilograms is added
Clean water, mix thoroughly, add 500-1000U/ kilograms of amylase by unit of enzyme activity U/ mass ratioes, stir, stir daily or
Once, quiescent culture 5-7 days is standby for stirring；D. in 1000 kilograms of soil of above-mentioned a. processing, by mass/mass than adding
Above-mentioned b. cultured products 2-30%, above-mentioned c. cultured products 1-15% is added, is thoroughly mixed thoroughly, and regarding concrete condition adjustment mixture
Moisture is to 60-90%, surrounding plastic covering film, or holds in sealing container, appropriate insulation, is sealed 25-45 days, can be with
Precipitation more than 99.4% heavy metal of solidification；Whole heavy-metal contaminated soil processing procedure terminates, and Heavy Metals in Contaminated Soils is big absolutely
Majority is converted to solid not soluble in water, without bioactivity and precipitated；Environmental pollution is greatly decreased.
The above method can be used for administering the agricultural land soil of heavy metal pollution, factory floor heavy metal pollution, Electroplate Factory/electricity
Xie Chang/papermaking sewage pond precipitation of heavy metals sludge, bed mud in river heavy metal pollution, refuse landfill heavy metal waste, metal
Mine and smeltery's heavy metal pollution of soil.
Enzyme preparation etc. can obtain at domestic and international market purchase and applicant in this technology.
Beneficial effect：The present invention can reduce and eliminate to greatest extent the solubility and bioactivity of heavy metal in soil,
So that various heavy changes into insoluble state, eliminate to greatest extent heavy metal pollution of soil and its destruction to environment and
Harm to the mankind, is advantageous to Ecological Sustainable Development.
The present invention is compared with prior art：
(1) chemistry, biochemical synthesis reduction and the sedimentation used in the present invention, method is easy, technology is simple and easy, can
Strong operability, cost are cheap, practical；
(2) plant straw powder and starch are added in the present invention, is naturally occurring organic matter, through cellulase and starch
After enzymatic degradation, produce substantial amounts of reduced sugar, promote in soil the reduction of high price heavy metal element and with dissolvable sulfide knot
Synthesizing heavy metal sulfide precipitation, so as to solidify harmful heavy metal, this is the maximum technical characteristic and innovative point of the present invention；
(3) electronation of the invention used, living things catalysis, enzymology complex art, reduce the throwing of harmful chemicals
Enter, reduce the residual of the harmful substance after soil treatment, consolidate with currently used single highly basic limewash or single calcium polysulfide
Agent is compared, and residue and secondary pollution can almost be ignored, while can increase the soil organism and organic colloid.
Brief description of the drawings
Fig. 1 is after 30 days, to solidify the precipitation solidification process signal such as Pb, Cd, Cr, Cu, Mn in bed mud in river using this technology
Figure.
Embodiment
Below in conjunction with example, the invention will be further described：
Embodiment 1：
1. heavy-metal contaminated soil is dug out, stack in cement flooring or plastics/ceramic vessel, with 0.2mol/L NaOH
And/or 0.2mol/L HCl adjust contaminated soil pH 5 first, outside surrounds whole heap soil with solid plastic tent so that
Whole heavy metal pollution processing procedure is carried out in closed space；By mass/mass ratio in 1000 kilograms of heavy-metal contaminated soils
Middle addition 0.1%K2SO3, 0.1-5%K2S2O3, 1% calcium polysulfide, stir soil several times, or stirring soil, mix thoroughly, it is standby；
2. in the plant straw powder double centner of the mesh of particle diameter 80,30 kilograms of clean waters are added, are mixed thoroughly, by enzymatic activity list
Position U/ mass ratioes add 1000U/ kilograms of cellulase, mix thoroughly, stir or stir daily once, quiescent culture 5 days is standby；
3. in the starch powder double centner of the mesh of particle diameter 100,40 kilograms of clean waters are added, are mixed thoroughly, by unit of enzyme activity U/
Mass ratio adds 1000U/ kilograms of amylase, stirs, stirs or stir daily once, quiescent culture 5 days is standby；
4. in 1000 kilograms of soil after above-mentioned 1. processing, by mass/mass than adding above-mentioned 2. cultured products 2%,
Above-mentioned 3. cultured products 2% are added, are thoroughly mixed thoroughly, and regarding concrete condition adjustment mixture moisture to 60%, surrounding plastic covering
Film, appropriate insulation, is sealed 25 days, can precipitate more than 99.5% heavy metal of solidification.
Embodiment 2：
1. heavy-metal contaminated soil is dug out, stack in cement flooring or plastics/ceramic vessel, with 1mol/L NaOH and/
Or 1mol/L HCl adjust contaminated soil pH 6 first, are carried out in closed Large Copacity trucd mixer or agitator tank so that whole
Heavy metal pollution processing procedure is carried out in closed space；Add by mass/mass ratio in 1000 kilograms of heavy-metal contaminated soils
Add 1%K2SO3, 1%K2S2O3, 10% calcium polysulfide, stir soil several times, or stirring soil, mix thoroughly, it is standby；
2. in the plant straw powder double centner of the mesh of particle diameter 100,50 kilograms of clean waters are added, are mixed thoroughly, by enzymatic activity list
Position U/ mass ratioes add 800U/ kilograms of cellulase, mix thoroughly, stir or stir daily once, quiescent culture 6 days is standby；
3. in the starch powder double centner of the mesh of particle diameter 200,60 kilograms of clean waters are added, are mixed thoroughly, by unit of enzyme activity U/
Mass ratio adds 800U/ kilograms of amylase, stirs, stirs or stir daily once, quiescent culture 6 days is standby；
4. in 1000 kilograms of soil after above-mentioned 1. processing, by mass/mass than adding above-mentioned 2. cultured products 10%,
Above-mentioned 3. cultured products 5% are added, are thoroughly mixed thoroughly, and mixture moisture is adjusted to 70% regarding concrete condition, hold sealing container
It is interior, appropriate insulation, it is sealed 35 days, more than 99.8% heavy metal of solidification can be precipitated.
Embodiment 3
1. heavy-metal contaminated soil is dug out, stack in cement flooring or plastics/ceramic vessel, with 4mol/L NaOH and/
Or 4mol/L HCl adjust contaminated soil pH 7 first, are carried out in closed Large Copacity trucd mixer or agitator tank so that whole
Heavy metal pollution processing procedure is carried out in closed space；Add by mass/mass ratio in 1000 kilograms of heavy-metal contaminated soils
Add 5%K2SO3, 5%K2S2O3, 30% calcium polysulfide, stir soil several times, or stirring soil, mix thoroughly, it is standby；
2. in the plant straw powder double centner of the mesh of particle diameter 300,60 kilograms of clean waters are added, are mixed thoroughly, by enzymatic activity list
Position U/ mass ratioes add 500U/ kilograms of cellulase, mix thoroughly, stir or stir daily once, quiescent culture 7 days is standby；
3. in the starch powder double centner of the mesh of particle diameter 300,80 kilograms of clean waters are added, are mixed thoroughly, by unit of enzyme activity U/
Mass ratio adds 500U/ kilograms of amylase, stirs, stirs or stir daily once, quiescent culture 7 days is standby；
4. in 1000 kilograms of soil of above-mentioned 1. processing, by mass/mass than adding above-mentioned 2. cultured products 30%, add
Plus 3. cultured products 10% are stated, thoroughly mix thoroughly, and mixture moisture is adjusted to 90% regarding concrete condition, hold sealing container
It is interior, appropriate insulation, it is sealed 45 days, more than 99.9% heavy metal of solidification can be precipitated.
The application example of the present invention：
The technology of the present invention is used to pollute various heavy soil remediation.
1st, with reference to embodiment 1, handled using this technology and contain the contaminated soils such as heavy metal Pb, Cd, Cr, Cu, Mn, passed through
After processing, sampling analysis after 25 days, remain Pb with not using the control soil of this technology to compare, in soil and reduce 99.7%,
Remain Cd and reduce 99.6%, residual Cr reduces 99.4%, and residual Cu reduces 99.7%, and residual Mn reduces by 99.9% (Fig. 1)；
2nd, with reference to embodiment 2, handled using this technology and contain the contaminated soils such as heavy metal Pb, Cd, Cr, Zn, Ni, passed through
After processing, sampling analysis after 30 days, remain Pb with not using the control soil of this technology to compare, in soil and reduce 99.4%,
Remain Cd and reduce 99.3%, residual Cr reduces 99.2%, and residual Zn reduces 99.6%, and residual Ni reduces 99.1%；
3rd, with reference to embodiment 3, handled using this technology and contain the contaminated soils such as heavy metal Pb, Cd, Cr, Hg, Fe, passed through
After processing, sampling analysis after 35 days, remain Pb with not using the control soil of this technology to compare, in soil and reduce 99.3%,
Remain Cd and reduce 99.2%, residual Cr reduces 99.1%, and residual Hg reduces 99.1%, and residual Fe reduces 99.5%.
Claims (7)
1. one kind of multiple heavy-metal contaminated soil ecological restoring methods and application, it is characterised in that step is：
A. heavy-metal contaminated soil is dug out, stacked in cement flooring or plastics/ceramic vessel, with 0.1-4mol/L NaOH and/
Or 0.1-4mol/L HCl adjust contaminated soil pH in 5-7 first, outside surrounds whole heap soil with solid plastic tent, or
Carried out in closed Large Copacity trucd mixer or agitator tank so that whole heavy metal pollution processing procedure is carried out in closed space；
By mass/mass ratio 0.1-5%K is added in 1000 kilograms of heavy-metal contaminated soils2SO3, 0.1-5%K2S2O3, 1-30% is more
Calcium sulfide, stir soil several times, or stirring soil, mix thoroughly, it is standby；
B. in the plant straw powder double centner of particle diameter 80-300 mesh, 30-60 kilograms of clean water is added, is mixed thoroughly, by enzymatic activity
Unit U/ mass ratioes add 500-1000U/ kilograms of cellulase, mix thoroughly, stir or stir daily once, quiescent culture 5-7 days,
It is standby；
C. in the starch powder double centner of particle diameter 100-300 mesh, 40-80 kilograms of clean water is added, is mixed thoroughly, by enzymatic activity list
Position U/ mass ratioes add 500-1000U/ kilograms of amylase, stir, stir or stir daily once, quiescent culture 5-7 days,
It is standby；
D. in 1000 kilograms of soil after above-mentioned a. processing, by mass/mass than adding above-mentioned b. cultured products 2-30%, add
Plus c. cultured products 1-15% are stated, thoroughly mix thoroughly, and mixture moisture is adjusted to 60-90%, surrounding covering regarding concrete condition
Plastic sheeting, or hold in sealing container, appropriate insulation, it is sealed 25-45 days, the huge sum of money of solidification more than 99.4% can be precipitated
Category；
E. the above method can be used for administering the agricultural land soil of heavy metal pollution, factory floor heavy metal pollution, Electroplate Factory/electrolysis
Factory/papermaking sewage pond precipitation of heavy metals sludge, bed mud in river heavy metal pollution, refuse landfill heavy metal waste, metallic ore
Mountain and smeltery's heavy metal pollution of soil.
2. one kind of multiple heavy-metal contaminated soil ecological restoring methods and application according to claim 1, it is characterised in that institute
The method of stating is to dig out heavy-metal contaminated soil, is stacked in cement flooring or container, with 0.1-4mol/LNaOH and/or 0.1-
4mol/LHCl adjusts contaminated soil pH and surrounds whole heap soil with solid plastic tent in 5-7, outside so that whole treated
Journey is carried out in closed space；By mass/mass ratio 0.1-5%K is added in 1000 kilograms of heavy-metal contaminated soils2SO3,
0.1-5%K2S2O3, 1-30% calcium polysulfides, stir soil several times, or stirring soil, mix thoroughly, it is standby.
3. one kind of multiple heavy-metal contaminated soil ecological restoring methods and application according to claim 1, it is characterised in that institute
State in method, in the plant straw powder double centner of particle diameter 80-300 mesh, add 30-60 kilograms of clean water, mix thoroughly, by enzyme
Active unit's U/ mass ratioes add 500-1000U/ kilograms of cellulase, mix thoroughly, stir or stir daily once, quiescent culture 5-
It is 7 days, standby.
4. one kind of multiple heavy-metal contaminated soil ecological restoring methods and application according to claim 1, it is characterised in that institute
Method is stated, in the starch powder double centner of particle diameter 100-300 mesh, 40-80 kilograms of clean water is added, mixes thoroughly, by enzymatic activity list
Position U/ mass ratioes add 500-1000U/ kilograms of amylase, stir, stir or stir daily once, quiescent culture 5-7 days,
It is standby.
5. in 1000 kilograms of soil after above-mentioned 1a. processing, by mass/mass than adding above-mentioned 1b. cultured products 2-30%,
Above-mentioned 1c. cultured products 1-15% is added, is thoroughly mixed thoroughly, and is covered regarding concrete condition adjustment mixture moisture to 60-90%, surrounding
Lid plastic sheeting, or hold in sealing container, appropriate insulation, it is sealed 25-45 days, the weight of solidification more than 99.4% can be precipitated
Metal.
6. one kind of multiple heavy-metal contaminated soil ecological restoring methods and application according to claim 1, it is characterised in that institute
Method is stated in concrete operations, to be capped tent, confined space in the surrounding of soil, or carried out in closed agitator tank.
7. any one kind of multiple heavy-metal contaminated soil ecological restoring methods of claim 1~6 are in industry, factory, life
Place, refuse landfill, municipal sludge, bed mud in river, metal mine, metallurgical works, paper mill, chemical plant, insecticide factory, electricity
Plate the application that the related place heavy metal pollution such as the contaminated sites such as factory, electrolysis plant is repaired.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112442379A (en) * | 2020-12-04 | 2021-03-05 | 福建龙净环保股份有限公司 | Plant-source eluting agent and preparation method and application thereof |
| CN115193906A (en) * | 2022-07-22 | 2022-10-18 | 环保桥(湖南)生态环境工程股份有限公司 | Method for repairing soil polluted by various heavy metals such as arsenic, lead, chromium and the like |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106244165A (en) * | 2016-08-25 | 2016-12-21 | 陈晓锋 | A kind of soil-repairing agent |
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| CN115193906A (en) * | 2022-07-22 | 2022-10-18 | 环保桥(湖南)生态环境工程股份有限公司 | Method for repairing soil polluted by various heavy metals such as arsenic, lead, chromium and the like |
| CN115193906B (en) * | 2022-07-22 | 2023-12-08 | 环保桥(湖南)生态环境工程股份有限公司 | Method for repairing soil polluted by various heavy metals such as arsenic, lead and chromium |
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