CN107418591A - The reparation medicament and restorative procedure of a kind of cadmium pollution soil - Google Patents
The reparation medicament and restorative procedure of a kind of cadmium pollution soil Download PDFInfo
- Publication number
- CN107418591A CN107418591A CN201710675000.5A CN201710675000A CN107418591A CN 107418591 A CN107418591 A CN 107418591A CN 201710675000 A CN201710675000 A CN 201710675000A CN 107418591 A CN107418591 A CN 107418591A
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- Prior art keywords
- soil
- medicament
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- cadmium
- cadmium pollution
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- 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
The invention discloses a kind of reparation medicament of cadmium pollution soil, it is characterised in that：It is described repair medicament parts by weight formula be：60 80 parts of sulfhydryl compound, 10 40 parts of sulfide, 0 10 parts of phosphate, 10 20 parts of pH value modulation material；The invention also discloses a kind of restorative procedure of cadmium pollution soil, comprise the following steps：(1) excavate contaminated soil and that the contaminated soil is transported into disposal field etc. is pending；(2) pending soil is crushed and sieved in disposal field；(3) the pending soil after screening is weighed, and detects the steps such as cadmium content, pH value and the water content in the pending soil after screening.The present invention provides a kind of the reparation medicament and restorative procedure of cadmium pollution soil, it can be good at reducing the usage amount of medicament, cycle and the expense of soil remediation are reduced, the stable curing effect of soil remediation can also be improved well, substantially increases the using effect of product and method.
Description
Technical field
The present invention relates to Cd pollution process fields, in particular to the reparation medicament and restorative procedure of a kind of cadmium pollution soil.
Background technology
The pollution problem that today's society faces is increasingly severe, with society development and progress, what people depended on for existence
The natural resources such as water, soil, air are all by different degrees of pollution.In order to which more preferable environmental protection, people are not only more next
More focus on production discharge index, it is also necessary to further contaminated resource is handled, allow it to again by
People are used.
Cadmium pollution just belongs to one kind in land pollution, on the improvement countermeasure of cadmium (Cd) contaminated land, main passing through
Stabilization method is learned to complete：
This method is mainly by reducing Cd in soil available content and the method for cadmium ion mineralising, to prevent plant
To water-soluble cadmium absorb, reduce geobiont toxicity, avoid the accumulation in plant, its advantage be input it is relatively low and take effect compared with
It hurry up, Cd biologically effective state content can be reduced by this method, but in the prior art, it is only capable of reducing 30-40% heavy metal
Bio-available Zn concentration, Cd solidification effects unobvious after stable mineralising in soil, change with environment and pH value and change stablizing effect,
Secondary pollution may be caused to environment, and then needs to carry out repeatedly construction and can be only achieved preferable effect.
In addition, the major product for the chemically stable method is metal ion stabilizer in the market, it is stabilized
Mechanism is so that medicament reacts with cadmium ion, reaches chelating function by ionic bonding effect.The heavy metal ion is stable
Although effect is preferable when agent uses in the early stage, the amount of the stabilizer needed for processing soil is larger, the cost for causing it to use
It is higher, and when environment changes, when being impacted such as acid rain or acid surface water etc., cadmium form in soil will change
Become, cause its stable curing effect by strong influence, or even secondary dirt will be caused to landfill yard Soil Surrounding and underground water
Dye.
So in view of the defects of the above method, nowadays need that a kind of stability is higher, cost is lower and cannot be easily caused
The reparation medicament and method of secondary pollution.
The content of the invention
It is an object of the invention to overcome above mentioned problem, there is provided the reparation medicament and restorative procedure of a kind of cadmium pollution soil,
It can be good at reducing the usage amount of medicament, reduce cycle and the expense of soil remediation, soil remediation can also be improved well
Stable curing effect, substantially increase the effect of product and method.
The purpose of the present invention is achieved through the following technical solutions：
A kind of reparation medicament of cadmium pollution soil, the parts by weight formula of the reparation medicament are：
Preferably, the sulfhydryl compound is dimethyl dithiocarbamate, tetrathio hydrazino formic acid and six
The mixture of any one material or two or more any material in thio guanidine radicals formic acid.
Preferably, the sulfide is vulcanized sodium；The phosphate is sodium dihydrogen phosphate.
Preferably, the pH value modulation material is any one material or any two in cement, lime and bentonite
The mixture of kind or two or more materials.
Further, the concrete configuration method of the reparation medicament is：
First, sulfhydryl compound, sulfide and phosphate are milled as not less than 200 mesh powders respectively；Secondly, by mercapto
Based compound powder, sulfide powder and phosphate powder are mixed and stirred for the uniformity being more than 95% mixed-powder；Finally,
PH value modulation is added in mixed-powder to expect and be stirred for uniformly, that is, obtaining repairing medicament again.
A kind of restorative procedure of cadmium pollution soil, comprises the following steps：
(1) excavate contaminated soil and that the contaminated soil is transported into disposal field etc. is pending；
(2) pending soil is crushed and sieved in disposal field；
(3) the pending soil after screening is weighed, and detects cadmium content, PH in the pending soil after screening
Value and water content；
(4) determine that medicament adds weight according to the parameter detected in the pending soil weight after screening and step (3),
And configure reparation medicament；
(5) pending soil is sufficiently mixed with the reparation medicament configured；
(6) soil that medicament is repaired to being mixed with conserves；
(7) soil after maintenance is tested, disqualified upon inspection then return to step (2), it is qualified to examine, and carries out step
(8)；
(8) soil after maintenance is handled.
The relation of reparation medicament and pending soil weight and pollutant component content is in step (4)：
When total cadmium content is below 100mg/kg in soil, the weight for repairing medicament is the 1-- of the soil gross weight
1.5%；
When total cadmium content is 100mg/kg--300mg/kg in soil, the weight for repairing medicament is the soil gross weight
2--5%；
When total cadmium content is more than 300mg/kg in soil, the weight for repairing medicament is the 5--10% of the soil gross weight.
Soil is mixed with repairing medicament first in step (5), and mixed soil carried out by soil mixer
Stirring makes its mixing abundant, and into soil after mixing plus water regulation soil water content to 20%-25%.
The place of soil maintenance described in step (6) needs first to carry out cure process, and ensures the process of soil maintenance
It is calm, without rain and soil in each component do not complete in the environment to exosmosis, and need to mix during maintenance
For the water content control of soil in 20%-25%, its curing time is 3-5 days afterwards.
The soil that processing described in step (8) includes being up to sanitary landfills requirement is backfilled or is fired into soil
Brick.
The present invention compared with prior art, has advantages below and beneficial effect：
(1) reparation medicament of the invention can be very good to be reacted with every heavy metal ion in cadmium pollution soil,
Lower usage amount is only needed, has just reached while has solidified cadmium ion and aid in solidifying the purpose of other heavy metal ion, well
Reduce the expense of input needed for soil remediation.
(2) restorative procedure of cadmium pollution soil of the invention can greatly improve the reparation speed of cadmium pollution soil, enter
And preferably reduce in repair process to the demand area in place, the expense of input needed for soil remediation is reduce further,
The promotion and popularization of this method are promoted well.
Embodiment
With reference to embodiment, the present invention is described in further detail, but the implementation of the present invention is not limited to this.
Embodiment 1
A kind of reparation medicament of cadmium pollution soil, the parts by weight formula of the reparation medicament are：
The sulfhydryl compound is dimethyl dithiocarbamate, tetrathio hydrazino formic acid and six thio guanidine radicals first
The mixture of any one material or two or more any material in acid.
The sulfide is vulcanized sodium；The phosphate is sodium dihydrogen phosphate.
PH value modulation material be any one material in cement, lime and bentonite or it is any two kinds or two kinds with
The mixture of upper material.
Embodiment 2
The present embodiment is different from the parts by weight that only difference is that the formula for repairing medicament of embodiment 1, is specially：
60 parts of sulfhydryl compound,
10 parts of sulfide,
10 parts of pH value modulation material.
Embodiment 3
The present embodiment is different from the parts by weight that only difference is that the formula for repairing medicament of embodiment 1,2, is specially：
Embodiment 4
The concrete configuration method of embodiment 1-3 reparation medicament is：
First, sulfhydryl compound, sulfide and phosphate are milled as not less than 200 mesh powders respectively；
Secondly, sulfhydryl compound powder, sulfide powder and phosphate powder are mixed and stirred for the uniformity being more than
95% mixed-powder；
Finally, pH value modulation is added in mixed-powder to expect and be stirred for uniformly, that is, obtaining repairing medicament again.
The reparation medicament when in use, the Cd in sulfhydryl compound therein and soil2+Reacted, so as to form stabilization
Ring shaped molecule structure, reached the purpose of stable cadmium ion；And repair the S in medicament2-And PO4 3-With other companions in soil
Raw heavy metal ion carries out reaction and forms relatively stable compound, and then the effect of the stable mineralising of auxiliary.Above-mentioned
Course of reaction is the popular response of this area, and those skilled in the art can slap well according to the technological know-how of this area
Above-mentioned reaction principle is held, just specific course of reaction is not repeated herein.
Embodiment 5
A kind of restorative procedure of cadmium pollution soil, comprises the following steps：
(1) excavate contaminated soil and that the contaminated soil is transported into disposal field etc. is pending；
(2) pending soil is crushed and sieved in disposal field；
(3) the pending soil after screening is weighed, and detects cadmium content, PH in the pending soil after screening
Value and water content；
(4) determine that medicament adds weight according to the parameter detected in the pending soil weight after screening and step (3),
And configure reparation medicament；
Parameter in soil needs that the parameter of multiple points is detected and averaged, and specific detection mode is selected
《Standard of soil environment quality》Heavy metal detection method specified in (GB 15618-1995).
Wherein, the relation of reparation medicament and pending soil weight and pollutant component content is：
When total cadmium content is below 100mg/kg in soil, the weight for repairing medicament is the 1-- of the soil gross weight
1.5%；
When total cadmium content is 100mg/kg--300mg/kg in soil, the weight for repairing medicament is the soil gross weight
2--5%；
When total cadmium content is more than 300mg/kg in soil, the weight for repairing medicament is the 5--10% of the soil gross weight；
The specific addition of above-mentioned reparation medicament needs to be finely adjusted according to the actual pollutant composition detected, with to the greatest extent
It is possible to reduce the dosage for repairing medicament, and then reduce the purpose of soil remediation cost.
(5) pending soil is sufficiently mixed with the reparation medicament configured；
Soil is mixed with repairing medicament first, and mixed soil, which is stirred, by soil mixer makes it mixed
Close it is abundant, and into soil after mixing plus water regulation soil water content to 20%-25%；
Medicament will be first repaired during mixing uniformly to sow on the surface of pending soil, and this has then been sowed into reparation medicine again
The pending soil of agent adds soil mixer and further mixed, and the time stirred every time is 3-5 minutes, altogether
Need to carry out 5 stirrings, and interval 7 minutes are needed per mixing time twice.
(6) soil that medicament is repaired to being mixed with conserves；
Soil maintenance place need first to carry out cure process, and ensure soil maintenance process it is calm, without rain and soil
Each component is not completed into the environment of exosmosis in earth, and after needing mixing during the maintenance soil water content control
For system in 20%-25%, its curing time is 3-5 days.The conventional techniques that cure process is this area are carried out to maintenance place,
Its purpose is to prevent each component from being infiltrated through during maintenance in the environment on periphery, to improve the final effect of maintenance.
Need to provide a nothing well for soil maintenance as moisturizing material in the surface of soil covering straw bag during maintenance
Wind, the environment without rain.During maintenance, repair medicament and reacted with cadmium unstable in soil, formed it into insoluble
The cadmium salt of property is precipitated, and then cadmium is settled out.
(7) soil after maintenance is tested, disqualified upon inspection then return to step (2), it is qualified to examine, and carries out step
(8)；
(8) soil after maintenance is handled；
The soil that specific processing includes being up to sanitary landfills requirement is backfilled or soil is fired into brick.
As described above, the present invention can be realized well.
Claims (10)
- A kind of 1. reparation medicament of cadmium pollution soil, it is characterised in that：It is described repair medicament parts by weight formula be：
- A kind of 2. reparation medicament of cadmium pollution soil according to claim 1, it is characterised in that：The sulfhydryl compound is Dimethyl dithiocarbamate, tetrathio hydrazino formic acid and any one material in six thio guanidine radicals formic acid are appointed Anticipate the mixture of two or more material.
- A kind of 3. reparation medicament of cadmium pollution soil according to claim 1, it is characterised in that：The sulfide is vulcanization Sodium；The phosphate is sodium dihydrogen phosphate.
- A kind of 4. reparation medicament of cadmium pollution soil according to claim 1, it is characterised in that：The pH value modulates material The mixture of any one material or two or more any material in cement, lime and bentonite.
- A kind of 5. reparation medicament of cadmium pollution soil according to claim 1-4 any one, it is characterised in that：It is described to repair The concrete configuration method of medicament is again：First, sulfhydryl compound, sulfide and phosphate are milled as not less than 200 mesh powders respectively；Secondly, by sulfhydrylation Compound powder, sulfide powder and phosphate powder are mixed and stirred for the uniformity being more than 95% mixed-powder；Finally, mixed Close and pH value modulation material is added in powder and is stirred for uniformly, that is, obtaining repairing medicament again.
- A kind of 6. restorative procedure of cadmium pollution soil, it is characterised in that：Comprise the following steps：(1) excavate contaminated soil and that the contaminated soil is transported into disposal field etc. is pending；(2) pending soil is crushed and sieved in disposal field；(3) the pending soil after screening is weighed, and detect screening after pending soil in cadmium content, pH value with And water content；(4) determine that medicament adds weight according to the parameter detected in the pending soil weight after screening and step (3), and match somebody with somebody Put reparation medicament；(5) pending soil is sufficiently mixed with the reparation medicament configured；(6) soil that medicament is repaired to being mixed with conserves；(7) soil after maintenance is tested, disqualified upon inspection then return to step (2), examines and qualified then carry out step (8)；(8) soil after maintenance is handled.
- A kind of 7. restorative procedure of cadmium pollution soil according to claim 6, it is characterised in that：Medicine is repaired in step (4) Agent and the relation of pending soil weight and pollutant component content are：When total cadmium content is below 100mg/kg in soil, the weight for repairing medicament is the 1--1.5% of the soil gross weight；When total cadmium content is 100mg/kg--300mg/kg in soil, the weight for repairing medicament is the 2-- of the soil gross weight 5%；When total cadmium content is more than 300mg/kg in soil, the weight for repairing medicament is the 5--10% of the soil gross weight.
- A kind of 8. restorative procedure of cadmium pollution soil according to claim 7, it is characterised in that：First will in step (5) Soil mix with repairing medicament, and by soil mixer mixed soil is stirred makes its mixing abundant, and to mixing After conjunction in soil plus water regulation soil water content to 20%-25%.
- A kind of 9. restorative procedure of cadmium pollution soil according to claim 8, it is characterised in that：Described in step (6) Soil maintenance place need first to carry out cure process, and ensure soil maintenance process it is calm, without rain and soil in each group Part do not completed into the environment of exosmosis, and the water content control of soil exists after needing mixing during the maintenance 20%-25%, its curing time are 3-5 days.
- A kind of 10. restorative procedure of cadmium pollution soil according to claim 9, it is characterised in that：Described in step (8) The soil that processing includes being up to sanitary landfills requirement is backfilled or soil is fired into brick.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710675000.5A CN107418591A (en) | 2017-08-09 | 2017-08-09 | The reparation medicament and restorative procedure of a kind of cadmium pollution soil |
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| CN201710675000.5A CN107418591A (en) | 2017-08-09 | 2017-08-09 | The reparation medicament and restorative procedure of a kind of cadmium pollution soil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108080403A (en) * | 2017-12-04 | 2018-05-29 | 新乡学院 | A kind of restorative procedure of lead cadmium pollution soil |
| CN109943345A (en) * | 2019-04-17 | 2019-06-28 | 湖南清之源环保科技有限公司 | Reparation medicament and its preparation method and application for handling heavy-metal contaminated soil |
| CN110408407A (en) * | 2019-08-21 | 2019-11-05 | 长沙凯泽工程设计有限公司 | A kind of tobacco-growing soil cadmium passivator and preparation method thereof |
| CN112588816A (en) * | 2020-10-27 | 2021-04-02 | 浙江海洋大学 | Remediation method of heavy metal contaminated soil |
| CN114651547A (en) * | 2022-03-04 | 2022-06-24 | 上海园林绿化建设有限公司 | Landscaping soil remediation treatment method |
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| CN1139387A (en) * | 1993-12-29 | 1997-01-01 | 巴科曼实验室国际公司 | Composition and process for reducing or preventing metal and acid contamination in rock drainage |
| CN105154093A (en) * | 2015-07-23 | 2015-12-16 | 永清环保股份有限公司 | Stabilizer for treating lead contaminated soil and application thereof |
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2017
- 2017-08-09 CN CN201710675000.5A patent/CN107418591A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1139387A (en) * | 1993-12-29 | 1997-01-01 | 巴科曼实验室国际公司 | Composition and process for reducing or preventing metal and acid contamination in rock drainage |
| CN105154093A (en) * | 2015-07-23 | 2015-12-16 | 永清环保股份有限公司 | Stabilizer for treating lead contaminated soil and application thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108080403A (en) * | 2017-12-04 | 2018-05-29 | 新乡学院 | A kind of restorative procedure of lead cadmium pollution soil |
| CN109943345A (en) * | 2019-04-17 | 2019-06-28 | 湖南清之源环保科技有限公司 | Reparation medicament and its preparation method and application for handling heavy-metal contaminated soil |
| CN110408407A (en) * | 2019-08-21 | 2019-11-05 | 长沙凯泽工程设计有限公司 | A kind of tobacco-growing soil cadmium passivator and preparation method thereof |
| CN112588816A (en) * | 2020-10-27 | 2021-04-02 | 浙江海洋大学 | Remediation method of heavy metal contaminated soil |
| CN114651547A (en) * | 2022-03-04 | 2022-06-24 | 上海园林绿化建设有限公司 | Landscaping soil remediation treatment method |
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Application publication date: 20171201 |