CN108405598A - A kind of heavy metal polluted soil of farmland renovation agent and its application - Google Patents
A kind of heavy metal polluted soil of farmland renovation agent and its application Download PDFInfo
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- CN108405598A CN108405598A CN201810208866.XA CN201810208866A CN108405598A CN 108405598 A CN108405598 A CN 108405598A CN 201810208866 A CN201810208866 A CN 201810208866A CN 108405598 A CN108405598 A CN 108405598A
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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
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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
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Mycology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of heavy metal polluted soil of farmland renovation agent and the in-situ remediation methods of heavy metal pollution agricultural land soil, by weight, the composition of raw materials of renovation agent includes dregs of sodium sulphide and yeast extract, and the mass ratio of the dregs of sodium sulphide and yeast extract is 2~10：1.The in-situ remediation method of the present invention comprising (1) polluted farmland soil is turned over；(2) heavy metal polluted soil of farmland renovation agent as described above is applied into polluted farmland soil；(3) it is conserved after step (2).Compared with existing renovation agent and restorative procedure, the present invention has apparent cost advantage, and the raw material of use are industrial produced wastes, cheap, while realizing the recycling of solid waste, reduce the pressure to environment, efficient and economical.
Description
Technical field
The present invention relates to a kind of renovation agents and restorative procedure specifically for contaminated by heavy metals agricultural land soil.
Background technology
In recent years, Prevention of Farmland from Pollution especially heavy metal pollution is repaired of increasing concern.Farmland soil heavy metals are dirty
Dye mostlys come from a large amount of of atmospheric sedimentation, the sewage irrigation containing heavy metal, pesticide containing heavy metal and chemical fertilizer and uses, at sewage
Manage factory's mud discharging and landfill leachate etc..The activity and eco-toxicity of heavy metal in soil are affected by soil pH,
Southern acid water rice region, such as Hunan, Jiangxi, Hubei, Sichuan, Guangxi, Yunnan, Guangdong area, farmland soil heavy metals cadmium
It is more universal to pollute exceeded phenomenon, rice cadmium is exceeded apparent.
Nearly 20,000,000 hectares of the contaminated cultivated area in China according to statistics, account for about the 1/5 of cultivated area, every year because of soil
Pollution and the grain yield of reduction is up to 10,000,000 tons, direct economic loss up to 10,000,000,000 yuan, in addition also 12,000,000 ton-grain eat,
The direct economic loss of the exceeded the two of its pollutant reaches more 20,000,000,000 yuan.Meanwhile heavy metal contaminants cannot be by chemistry or biology
Degradation, easily by food chain in plant, animal and people's cylinder accumulation, toxicity is big, strong to ecological environment, food security and human body
Health constitutes a serious threat.
Currently, the technology suitable for farmland soil heavy metals pollution amelioration includes mainly following 4 kinds：(1) agronomy regulation skill
It is effective mainly to reduce heavy metal in soil by the measures such as water management, fertilizer application, farming and crop rotation, soil pH adjusting for art
Property, it reduces it and is accumulated to the migration of crops edible part；(2) it is passivated recovery technique, it is mainly environmentally friendly by adding
Passivating material, using the absorption of passivating material surface and endoporus, complexing, precipitation, displacement the effects that, reduce heavy metal in soil
Activity, migration and the biological effectiveness of ion；(3) phytoremediation technology mainly utilizes the enrichment and super enrichment filtered out
Plant reduces the content of heavy metal in soil to the absorption extraction of heavy metal in soil；(4) plant leaf surface Barrier Technology, mainly
It is the uptake and accumulation by spraying trace element, inhibition or antagonism crops to effect of fertilizer in corps leaf surface.Its
Middle passivation recovery technique is fast with reparation rate, effect is good, stability is strong, moderate, simple operation and other advantages, especially suitable
It is a current studies in China agricultural land soil huge sum of money the most active for the repairing and treating of large area heavy metal pollution agricultural land soil
Belong to pollution remediation technology.
It discloses a kind of application No. is the patent of CN201510818835.2 while being passivated cadmium in agricultural land soil, lead, zinc
Heavy metal deactivator and preparation method thereof is directed to heavy metal passivation that is a kind of while being passivated cadmium in agricultural land soil, lead, zinc
Agent, raw material components and its weight percent composition are as follows：Weathered coal 15~25%, calcining powder 15~30%, pyrite slag 15~
25%, activated carbon 10~15%, calcium magnesium phosphate 10~15%.The preparation method of the heavy metal deactivator is：First by weathered coal,
Activated carbon is mixed with calcining powder, pyrite slag, is stirred evenly, then mixed with calcium magnesium phosphate, is sufficiently stirred, after mixing, system
Obtain the heavy metal deactivator for being passivated cadmium in agricultural land soil, lead, zinc simultaneously.Application No. is the patent of CN201610631573.3 public affairs
A kind of method for repairing heavy metal polluted soil of farmland is opened, method and step includes：(1) in heavy metal farmland pollution soil
In earth, by shallow-layer contaminated soil with do not dug clearly by the deep soil of heavy metal pollution, it is separately temporary；(2) by shallow-layer dirt
Dye soil addition heavy metal deactivator is repaired；(3) soil up to standard after repairing step (2) is backfilled to former not by a huge sum of money
Belong to the position of the deep soil of pollution, and to backfilling soil compression, then will not backfilled again by the deep soil of heavy metal pollution
To the top of soil up to standard；(4) it is not improved by the deep soil of heavy metal pollution to what is be located above, to be suitble to farming
The plantation of object.The preparation of above method and renovation agent is more complex.
With to farmland soil heavy metals pollution understanding deeply and environmental protection and human health requirement are carried
Height repairs also with regard to more stringent requirements are proposed agricultural land soil.Single recovery technique is difficult preferably to be repaiied to combined pollution
It is multiple, therefore how reasonably to be combined various recovery techniques, really in terms of soil pollution reparation making a breakthrough property into
Exhibition becomes following development trend.
Dregs of sodium sulphide is the waste residue generated when producing vulcanized sodium using feed coal and saltcake (sodium sulphate), and main component is
Vulcanized sodium, silica, sodium sulphate, calcium sulfate, magnesium sulfate and unburned carbon.Dregs of sodium sulphide is extremely strong alkali, stacks place
Not even a blade of grass grows.The yield of the waste residue accounts for about 14% or so of vulcanized sodium yield, and yield is big, and intractability is big, and waste heap manufactures
At prodigious environmental pressure.
Invention content
It is a kind of specifically for by a huge sum of money the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide
Belong to the renovation agent of the agricultural land soil of pollution, which prepares and using simply, repairing effect is good, at low cost.
The present invention solves a kind of restorative procedure of heavy metal pollution agricultural land soil simultaneously, and this method is simple, repairing effect is good
And dregs of sodium sulphide process problem can be solved simultaneously.
The present invention is to solve the above problems, a kind of technical solution taken is as follows：
A kind of heavy metal polluted soil of farmland renovation agent, by weight, the composition of raw materials of the renovation agent includes vulcanization
The mass ratio of alkaline residue and yeast extract, the dregs of sodium sulphide and yeast extract is 2~10：1.
Preferably, the weight ratio of the dregs of sodium sulphide and yeast extract is 3~6:1.
Further, the dregs of sodium sulphide is to produce the waste residue generated during vulcanized sodium with coal and saltcake, and pH is
8~9.
Preferably, the moisture content of the dregs of sodium sulphide is 5wt%~15wt%.
Further, the yeast extract is yeast extract and/or yeast extract.
Further, the renovation agent is to press formula rate mixing, the particulate matter being ground up, sieved by the raw material.
The present invention also provides a kind of in-situ remediation methods of heavy metal pollution agricultural land soil comprising following steps：
(1) polluted farmland soil is turned over；
(2) heavy metal polluted soil of farmland renovation agent as described above is applied into polluted farmland soil；
(3) it is conserved after step (2).
Preferably, the step (1) carries out prior to seeding.It is highly preferred that carrying out within 60~90 days prior to seeding.
A specific aspect according to the present invention applied into polluted farmland soil while step (1) Soil tillage
Spread the heavy metal polluted soil of farmland renovation agent.
Preferably, the usage amount of the heavy metal soil-repairing agent is 80~120kg/ mus.
According to the present invention, the maintenance is that soil is instigated to maintain a period of time under a certain state.Usually remove conventional strip
Part (temperature, water content or oxygen content) control is outer, without other operations.
Preferably, when step (3) conserves, farmland is made to be in waterflooding state.
Preferably, curing time is 60~90 days.
Preferably, maintenance is made to be carried out in 25 DEG C of environment temperature or more.
Heavy metal polluted soil of farmland renovation agent according to the present invention while or a kind of soil pH adjusting agent.
Compared with prior art, beneficial effects of the present invention are as follows：
The present invention makes full use of the characteristic of dregs of sodium sulphide, yeast extract and agricultural land soil especially water paddy soil, leads to
Cross the in-situ immobilization that renovation agent made of compounding dregs of sodium sulphide, yeast extract in specific proportions is applied to agricultural land soil, a side
Face greatly reduces the migration and eco-toxicity of heavy metal；On the other hand, pressure of the dregs of sodium sulphide to environment is effectively reduced
Power realizes that waste resourceization utilizes.The restorative procedure of the present invention is the combination of chemistry and microorganism remediation technology, construction technology
Simply, of low cost, it is a kind of efficient, economic heavy metal polluted soil of farmland restorative procedure.
Specific implementation mode
It is known that yeast extract (yeast extract and yeast extract) is rich in protein, amino acid, peptide, polypeptide, nucleic acid, dimension
The nutritional ingredients such as raw element and trace element, are widely used in microculture industry in the prior art.At soil pollution
Reason field, yeast extract are often added in the medium as trace element to use.
Yeast extract and dregs of sodium sulphide are carried out the original position that organic assembling is used for heavy metal pollution agricultural land soil by the present invention
It repairs.The substances such as a large amount of growth factor, the amino acid wherein contained in yeast extract, can while providing nitrogen source
Greatly facilitate growth and the generation of a large amount of sulfate reducing bacteria contained in agricultural land soil especially water paddy soil
It thanks.The main component of dregs of sodium sulphide be vulcanized sodium, silica, sodium sulphate, calcium sulfate, magnesium sulfate and unburned carbon, wherein
Contain a large amount of sulfate ion.Promote sulfate reducing bacteria in micro- oxygen under yeast extract and the collective effect of dregs of sodium sulphide
Under conditions of using sulfate radical as electron acceptor sulfate radical is reduced into sulphion, sulphion is combined with heavy metal in soil
The low compound of dissolubility is generated, and the substances such as silica in dregs of sodium sulphide also react with heavy metal and generate stable change
Close object.The soil-repairing agent can also adjust soil pH simultaneously, further decrease the toxicity of heavy metal.Realizing of this technology
The combination of and microorganism remediation technology, can greatly reduce the migration and eco-toxicity of heavy metal.
The present invention makes full use of the sulfate reducing bacteria in contaminated soil, and growth needed nutrient matter and life are provided for it
Condition is deposited, the solidification and stabilization of heavy metal in soil is carried out using the growth metabolism product of sulfate reducing bacteria.Reaching a huge sum of money
Belonging to the while of repairing purpose realizes utilization of waste as resource, reduces pressure of the dregs of sodium sulphide to environment.This restorative procedure
For the combination of chemistry and microorganism remediation technology, construction technology is simple, of low cost, is an a kind of efficient, economic farmland huge sum of money
Belong to the restorative procedure of contaminated soil.
The present invention is described in further details below in conjunction with specific embodiment, the condition being not specified in embodiment is
The condition of this field routine.In the dosage or dosage for addressing substance, unless stated otherwise, weight is referred both to.Following embodiment
Middle dregs of sodium sulphide pH=8.23, moisture content 12%, renovation agent grinding sieve with 100 mesh sieve.Soil-repairing agent is to Soil tillage
While add.
Embodiment 1
A kind of heavy metal polluted soil of farmland renovation agent, is prepared by the following method to obtain：Take 100 parts of dregs of sodium sulphide with
20 parts of yeast extracts are uniformly mixed, and grinding sieves with 100 mesh sieve, and obtains heavy-metal contaminated soil renovation agent.
It is added in heavy metal pollution agricultural land soil with 100kg/ mus of additive amount, waterflooding conserves 80 days, ring during maintenance
Border temperature is 28~37 DEG C.
Comparative example 1
A kind of heavy metal polluted soil of farmland renovation agent, is prepared by the following method to obtain：Take 40 parts of dregs of sodium sulphide and 60
Part yeast extract is uniformly mixed, and grinding sieves with 100 mesh sieve, and obtains heavy-metal contaminated soil renovation agent.
It is added in heavy metal pollution agricultural land soil with 100kg/ mus of additive amount, waterflooding conserves 80 days, ring during maintenance
Border temperature is 28~37 DEG C.
Embodiment 2
A kind of heavy metal polluted soil of farmland renovation agent, is prepared by the following method to obtain：Take 80 parts of dregs of sodium sulphide and 20
Part yeast extract is uniformly mixed, and grinding sieves with 100 mesh sieve, and obtains heavy-metal contaminated soil renovation agent.
It is added in heavy metal pollution agricultural land soil with 100kg/ mus of additive amount, waterflooding conserves 80 days, ring during maintenance
Border temperature is 28~37 DEG C.
Embodiment 3
A kind of heavy metal polluted soil of farmland renovation agent, is prepared by the following method to obtain：Take 80 parts of dregs of sodium sulphide and 20
Part yeast extract is uniformly mixed, and grinding sieves with 100 mesh sieve, and obtains heavy-metal contaminated soil renovation agent.
It is added in heavy metal pollution agricultural land soil with 50kg/ mus of additive amount, waterflooding conserves 80 days, ring during maintenance
Border temperature is 28~37 DEG C.
Embodiment 4
A kind of heavy metal polluted soil of farmland renovation agent, is prepared by the following method to obtain：Take 60 parts of dregs of sodium sulphide and 10
Part yeast extract is uniformly mixed, and grinding sieves with 100 mesh sieve, and obtains heavy-metal contaminated soil renovation agent.
It is added in heavy metal pollution agricultural land soil with 100kg/ mus of additive amount, waterflooding conserves 65 days, ring during maintenance
Border temperature is 28~37 DEG C.
Embodiment 5
A kind of heavy metal polluted soil of farmland renovation agent, is prepared by the following method to obtain：Take 60 parts of dregs of sodium sulphide and 10
Part yeast extract is uniformly mixed, and grinding sieves with 100 mesh sieve, and obtains heavy-metal contaminated soil renovation agent.
It is added in heavy metal pollution agricultural land soil with 100kg/ mus of additive amount, waterflooding conserves 30 days, ring during maintenance
Border temperature is 28~37 DEG C.
Embodiment 6
A kind of heavy metal polluted soil of farmland renovation agent, is prepared by the following method to obtain：Take 60 parts of dregs of sodium sulphide and 20
Part yeast extract is uniformly mixed, and grinding sieves with 100 mesh sieve, and obtains heavy-metal contaminated soil renovation agent.
It is added in heavy metal pollution agricultural land soil with 100kg/ mus of additive amount, waterflooding conserves 90 days, ring during maintenance
Border temperature is 28~37 DEG C.
Embodiment 7
A kind of heavy metal polluted soil of farmland renovation agent, is prepared by the following method to obtain：Take 60 parts of dregs of sodium sulphide and 20
Part yeast extract is uniformly mixed, and grinding sieves with 100 mesh sieve, and obtains heavy-metal contaminated soil renovation agent.
It is added in heavy metal pollution agricultural land soil with 100kg/ mus of additive amount, waterflooding conserves 90 days, ring during maintenance
Border temperature is 12~20 DEG C.
Comparative example 2
100kg/ mus of yeast extracts are added into heavy metal pollution agricultural land soil, waterflooding conserves 90 days, environment during maintenance
Temperature is 28~37 DEG C.
Comparative example 3
100kg/ mus of dregs of sodium sulphide are added into heavy metal pollution agricultural land soil, waterflooding conserves 90 days, environment during maintenance
Temperature is 28~37 DEG C.
The blank control experimental group CK of renovation agent is not added in experiment while setting.Heavy metal concentration described in embodiment
The heavy metal available state concentration extracted through DTPA extraction methods.Detection data is shown in Table 1.
1 available heavy metal detection data of table
Unit：mg/kg
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of heavy metal polluted soil of farmland renovation agent, it is characterised in that：By weight, the composition of raw materials of the renovation agent
Including dregs of sodium sulphide and yeast extract, the mass ratio of the dregs of sodium sulphide and yeast extract is 2~10：1.
2. heavy metal polluted soil of farmland renovation agent according to claim 1, it is characterised in that：The dregs of sodium sulphide with
The weight ratio of yeast extract is 3~6:1.
3. heavy metal polluted soil of farmland renovation agent according to claim 1, it is characterised in that：The dregs of sodium sulphide is
With the waste residue generated during coal and saltcake production vulcanized sodium, pH is 8~9.
4. heavy metal polluted soil of farmland renovation agent according to claim 1 or 3, it is characterised in that：The dregs of sodium sulphide
Moisture content be 5wt%~15wt%.
5. heavy metal polluted soil of farmland renovation agent according to claim 1, it is characterised in that：The yeast extract is
Yeast extract and/or yeast extract.
6. heavy metal polluted soil of farmland renovation agent according to claim 1, it is characterised in that：The renovation agent is by institute
Raw material is stated by formula rate mixing, the particulate matter being ground up, sieved.
7. a kind of in-situ remediation method of heavy metal pollution agricultural land soil, which is characterized in that include the following steps：
(1) polluted farmland soil is turned over；
(2) the heavy metals in farmland pollution as described in any one of claim 1 to 6 claim is applied into polluted farmland soil
Soil-repairing agent；
(3) it is conserved after step (2).
8. the method according to the description of claim 7 is characterized in that the step (1) carries out for 60~90 days prior to seeding.
9. the method according to the description of claim 7 is characterized in that polluted agricultural land while carrying out step (1) Soil tillage
The heavy metal polluted soil of farmland renovation agent is applied in soil.
10. according to the method described in claim 7, it is characterized in that：The usage amount of the heavy metal soil-repairing agent be 80~
120kg/ mus；When step (3) conserves, farmland is made to be in waterflooding state, curing time is 60~90 days.
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| CN201810208866.XA CN108405598A (en) | 2018-03-14 | 2018-03-14 | A kind of heavy metal polluted soil of farmland renovation agent and its application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433810A (en) * | 2018-12-14 | 2019-03-08 | 佛山市铁人环保科技有限公司 | A kind of restorative procedure of Farmland Soil Pollution |
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| CN105112057A (en) * | 2015-07-29 | 2015-12-02 | 福建三炬生物科技股份有限公司 | Soil heavy metal repairing agent, preparation thereof and application |
| CN107602040A (en) * | 2017-09-22 | 2018-01-19 | 中国环境科学研究院 | Reduce solidification and stabilization agent of heavy metal in soil Leaching and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104312949A (en) * | 2014-10-10 | 2015-01-28 | 苏州市环境科学研究所 | Organic chloride pollutant purifying method as well as purifying agent and culture solution used by method |
| CN105112057A (en) * | 2015-07-29 | 2015-12-02 | 福建三炬生物科技股份有限公司 | Soil heavy metal repairing agent, preparation thereof and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109433810A (en) * | 2018-12-14 | 2019-03-08 | 佛山市铁人环保科技有限公司 | A kind of restorative procedure of Farmland Soil Pollution |
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