CN109201724A - A kind of method that Uranium tailings uranium and association heavy-metal contaminated soil are repaired in phosphorus-containing compound passivation - Google Patents
A kind of method that Uranium tailings uranium and association heavy-metal contaminated soil are repaired in phosphorus-containing compound passivation Download PDFInfo
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- CN109201724A CN109201724A CN201810938495.0A CN201810938495A CN109201724A CN 109201724 A CN109201724 A CN 109201724A CN 201810938495 A CN201810938495 A CN 201810938495A CN 109201724 A CN109201724 A CN 109201724A
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- uranium
- phosphorus
- heavy metal
- containing compound
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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
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mycology (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Botany (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The step of the invention discloses a kind of phosphorus-containing compounds to be passivated the method for repairing Uranium tailings uranium and association heavy-metal contaminated soil, and institute includes is: the first step, phosphorus-containing compound screening；Second step, Uranium tailings contaminated soil uranium and association heavy metal Passivation Treatment；Third step, uranium and the tolerance of association heavy metal, enriching quantity is small and is mainly enriched in foliage filter screening and the utilization of root, it is cultivated according to each kind planting requirement, it can harvest the agricultural product of edible safety in the content of uranium and association heavy metal low concentration pollution region reduction uranium and association heavy metal available state and obtain preferable income.
Description
Technical field
The present invention relates to contaminated soil technical field of biological remediation, in particular to Uranium tailings uranium is repaired in phosphorus-containing compound passivation
And association heavy-metal contaminated soil.Suitable for radioactivity and heavy metals such as Uranium tailings, uranium waste rock heap and ex-service uranium mine regions
The comprehensive treatment of dual contaminated soil.
Background technique
With the continuous exhaustion of the fast development of world economy, environmental protection and fossil energy, the exploitation of extensive nuclear energy and
Using as inevitable choice.The uranium resource exploration constantly accelerated and recovery process, Uranium tailings and the uranium for producing substantial amounts are useless
Ore storage.Uranium tailings stockpiling region lacks vegetative coverage and causes soil erosion and dusty, keeps uranium and association heavy metal-polluted
Contaminate object diffusion.The uranium mine of 100,000 t of annual output according to statistics, every year about can output 10~600,000 t barren rocks.China's uranium ore at present
The barren rock total amount that digging comes out is about 2.8 × l06t, 2.5 × 106 m2 of occupied area.So a large amount of barren rock, tailings not only account for
It according to large stretch of mountain valley and greenery patches, and is also the radioactive pollution source of a huge low-level or extremely low level.On the one hand
It is contaminated with a small amount of uranium mineral in barren rock and constantly releases 222Rn, in addition, China's major part Uranium tailings are closer away from river basin,
As the artificial loose heap with high potential energy, the rain drop erosion the effects of under cause barren rock and be lost, periphery farmland, water will be caused
The environmental pollutions such as source directly endanger the production and living of local resident, can also cause the fear of local resident, give ecological safety, people
The people's livelihood is living, social stability causes damages.
The method for administering radioactivity and heavy-metal contaminated soil mainly has: physics, chemistry and biological method.Nucleic and a huge sum of money
Belong in the soil mainly with ion-exchange state, carbonate combine state, organically-bound, amorphous iron Mn oxide reference state,
Six kinds of forms such as crystalloid Mn oxide reference state, residual form exist, and wherein the content of residual form accounts for major part, ion-exchange state
It is the available state for being easy to be absorbed by plants with carbonate combine state.Passivation recovery technique is by adding chemistry into contaminated soil
Modifying agent, the effects of making nucleic and heavy metal ion that absorption, redox, precipitating and antagonism occur, so that reducing its biology has
Effect property achievees the purpose that repair radioactivity and heavy-metal contaminated soil.On this basis, it screens and using to nucleic and heavy metal
The small excluder of tolerance, enriching quantity and root enriching plant are made low cost, are efficiently repaired according to different pollution environment
The mating ecological reestablishment of the optimization of Uranium tailings radioactivity and heavy-metal contaminated soil is one of current biological reparation development
New trend.
Summary of the invention
It is passivated the object of the present invention is to provide a kind of phosphorus-containing compound and repairs Uranium tailings uranium and association heavy-metal contaminated soil
Method, for uranium and the association heavy metal such as Uranium tailings, uranium waste rock heap and ex-service uranium mine region in the solution Uranium of low cost
Dual contaminated soil provides technological service.
The technical scheme is that Uranium tailings uranium and association heavy-metal contaminated soil are repaired in a kind of phosphorus-containing compound passivation
Method, the technical step for being included is: the first step, phosphorus-containing compound selection；Second step, Uranium tailings contaminated soil uranium and association
Heavy metal Passivation Treatment；Third step, uranium and the tolerance of association heavy metal, enriching quantity it is small and be mainly enriched in the Plant choosing of root with
It utilizes.Specific steps are as follows:
A, phosphorus-containing compound select: one or both of ssp dnab, potassium dihydrogen phosphate, nano-hydroxy ground phosphate rock and with
On combination；
B, Uranium tailings contaminated soil uranium and association heavy metal Passivation Treatment: 3~9g/m of soil is pressed2Amount weigh phosphorus-containing compound,
Again in phosphorus-containing compound: organic matter is to spread fertilizer over the fields in soil surface and turn in soil after the ratio premix of 1:50~100 is uniform
In；
C, it Plant choosing and utilization: chooses to uranium and association heavy metal are resistant to, enriching quantity is small and the main Ma Ling for being enriched in root
The group of one or both of potato, pachyrhizus, onion, rape, soybean, wheat, corn, sunflower or more merges according to each kind
Planting requirement is cultivated, and can reduce uranium and association heavy metal available state in uranium and association heavy metal low concentration pollution region
Content harvests the agricultural product of edible safety and obtains preferable income.
Uranium and association heavy metal ion-exchange state in the soil and carbonate combine state belong to having of being easily absorbed by plants
State is imitated, causes the agricultural product security harvested on contaminated soil poor.Phosphorus-containing compound can effectively reduce uranium and association heavy metal
80% or more soil available content, dramatically increase the organically-bound for being not easy to be absorbed by plants, amorphous iron Mn oxide
The content of the forms such as reference state, crystalloid Mn oxide reference state, residual form.Uranium tailings uranium and association heavy metal pollution are repaired in passivation
Soil, it is technologically advanced, it is easy to implement the method, it is easy to operate, it is low in cost, it can there are also preferable while administering Uranium tailings soil pollution
Economic benefit, reduce large area soil remediation and the great number economic compensation born.
Specific embodiment
The present invention is described in further details combined with specific embodiments below.
Embodiment 1:
The first step, phosphorus-containing compound selection is nano-hydroxy ground phosphate rock.
Second step, Uranium tailings contaminated soil uranium and association heavy metal Passivation Treatment, by soil 3g/m2Amount weigh containing phosphatization
Object is closed, then in phosphorus-containing compound: after the ratio premix that organic matter is 1:50 is uniform, spreading fertilizer over the fields in soil surface and turn in soil
In.
Third step is screened and is utilized to uranium and association heavy metal are resistant to, enriching quantity is small and the main Ma Ling for being enriched in root
Potato requires to be cultivated according to potato planting, can harvest edible safety in uranium and association heavy metal low concentration pollution region
Agricultural product and obtain preferable income.
Embodiment 2:
The first step, phosphorus-containing compound screening is calcium superphosphate and potassium dihydrogen phosphate.
Second step, Uranium tailings contaminated soil uranium and association heavy metal Passivation Treatment, by soil 9g/m2Amount weigh containing phosphatization
Object is closed, then in phosphorus-containing compound: after the ratio premix that organic matter is 1:100 is uniform, spreading fertilizer over the fields in soil surface and turn in soil
In.
Third step is screened and is utilized to uranium and association heavy metal are resistant to, enriching quantity is small and the main pachyrhizus for being enriched in root
With the combination of corn, require to be cultivated according to pachyrhizus and corn planting, it can be in uranium and association heavy metal low concentration pollution area
The agricultural product of domain harvest edible safety simultaneously obtain preferable income.
Embodiment 3:
The first step, phosphorus-containing compound select the combination of calcium superphosphate and nano-hydroxy ground phosphate rock.
Second step, Uranium tailings contaminated soil uranium and association heavy metal Passivation Treatment, by soil 5g/m2Amount weigh containing phosphatization
Object is closed, then in phosphorus-containing compound: after the ratio premix that organic matter is 1:70 is uniform, spreading fertilizer over the fields in soil surface and turn in soil
In.
Third step is screened and is utilized to uranium and association heavy metal are resistant to, enriching quantity is small and the main onion for being enriched in root
With the combination of soybean, require to be cultivated according to onion and soybean planting, it can be in uranium and association heavy metal low concentration pollution area
The agricultural product of domain harvest edible safety simultaneously obtain preferable income.
Embodiment 4:
The first step, phosphorus-containing compound select the combination of potassium dihydrogen phosphate, calcium superphosphate and nano-hydroxy ground phosphate rock.
Second step, Uranium tailings contaminated soil uranium and association heavy metal Passivation Treatment, by soil 7g/m2Amount weigh containing phosphatization
Object is closed, then in phosphorus-containing compound: after the ratio premix that organic matter is 1:80 is uniform, spreading fertilizer over the fields in soil surface and turn in soil
In.
Third step is screened and is utilized to uranium and association heavy metal are resistant to, enriching quantity is small and the main rape for being enriched in root
With the combination of wheat, require to be cultivated according to rape and wheat planting, it can be in uranium and association heavy metal low concentration pollution area
The agricultural product of domain harvest edible safety simultaneously obtain preferable income.
Embodiment 5:
The first step, phosphorus-containing compound select the combination of calcium superphosphate and nano-hydroxy ground phosphate rock.
Second step, Uranium tailings contaminated soil uranium and association heavy metal Passivation Treatment, by soil 8g/m2Amount weigh containing phosphatization
Object is closed, then in phosphorus-containing compound: after the ratio premix that organic matter is 1:80 is uniform, spreading fertilizer over the fields in soil surface and turn in soil
In.
Third step, screening with using to uranium and association heavy metal tolerance, enriching quantity it is small and mainly be enriched in root onion,
The combination of soybean and sunflower requires to be cultivated according to onion, soybean and sunflower planting, can be in uranium and association heavy metal
The agricultural product of low concentration pollution region harvest edible safety simultaneously obtain preferable income.
Dosage of each component, ratio in the present patent application, unless specified otherwise other than, be mass percentage or quality
Than.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and example shown and described herein.
Claims (1)
1. a kind of method that Uranium tailings uranium and association heavy-metal contaminated soil are repaired in phosphorus-containing compound passivation, which is characterized in that according to
It is secondary to include the following steps:
A, phosphorus-containing compound selects: phosphorus-containing compound screens one of calcium superphosphate, potassium dihydrogen phosphate, nano-hydroxy ground phosphate rock
Or two kinds or more of combination；
B, Uranium tailings contaminated soil uranium and association heavy metal Passivation Treatment: 3~9g/m of soil is pressed2Amount weigh phosphorus-containing compound, then
In phosphorus-containing compound: organic matter is to spread fertilizer over the fields in soil surface and turn in soil after the ratio premix of 1:50~100 is uniform；
C, uranium and association heavy metal are resistant to, enriching quantity is small and are mainly enriched in foliage filter screening and the utilization of root: screening and utilization
To uranium and the tolerance of association heavy metal, enriching quantity is small and is mainly enriched in the potato of root, pachyrhizus, onion, rape, soybean, small
The group merging of one or both of wheat, corn, sunflower or more is cultivated according to each kind planting requirement, can be reduced
The content of uranium and association heavy metal available state harvests the agricultural product of edible safety and obtains preferable income.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810938495.0A CN109201724A (en) | 2018-08-17 | 2018-08-17 | A kind of method that Uranium tailings uranium and association heavy-metal contaminated soil are repaired in phosphorus-containing compound passivation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810938495.0A CN109201724A (en) | 2018-08-17 | 2018-08-17 | A kind of method that Uranium tailings uranium and association heavy-metal contaminated soil are repaired in phosphorus-containing compound passivation |
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| CN109201724A true CN109201724A (en) | 2019-01-15 |
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| CN201810938495.0A Pending CN109201724A (en) | 2018-08-17 | 2018-08-17 | A kind of method that Uranium tailings uranium and association heavy-metal contaminated soil are repaired in phosphorus-containing compound passivation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110040919A (en) * | 2019-04-19 | 2019-07-23 | 辽宁大学 | A kind of compound phosphorous passivator of ground phosphate rock-phosphate and its preparation method and application |
| CN113105900A (en) * | 2021-04-15 | 2021-07-13 | 兰州大学 | Repairing agent for in-situ passivation of fixed uranium nuclide and associated heavy metal and preparation method thereof |
| CN115775646A (en) * | 2022-11-18 | 2023-03-10 | 中核第四研究设计工程有限公司 | Method for stabilizing uranium associated zirconium and zirconium oxide neutralization slag and stabilizing agent used in method |
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| JPS5474217A (en) * | 1977-08-25 | 1979-06-14 | Minemet Rech Sa | Uranium recovering method |
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| CN101491810A (en) * | 2009-02-23 | 2009-07-29 | 湖南科技大学 | Method for preventing and controlling heavy-metal movement of uranium tailings slag using plants |
| CN102658289A (en) * | 2012-05-18 | 2012-09-12 | 西南科技大学 | Method for enhancing capacity of repairing soil polluted by uranium or/and cadmium of broad bean by using fertilizer |
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| US4282188A (en) * | 1977-08-25 | 1981-08-04 | Minemet Recherche | Process for the recovery of uranium contained in phosphated solutions |
| US20090116908A1 (en) * | 2006-05-19 | 2009-05-07 | Brian Dymond | Rehabilitation Method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110040919A (en) * | 2019-04-19 | 2019-07-23 | 辽宁大学 | A kind of compound phosphorous passivator of ground phosphate rock-phosphate and its preparation method and application |
| CN110040919B (en) * | 2019-04-19 | 2022-03-25 | 辽宁大学 | Ground phosphate rock-phosphate composite phosphorus-containing passivator and preparation method and application thereof |
| CN113105900A (en) * | 2021-04-15 | 2021-07-13 | 兰州大学 | Repairing agent for in-situ passivation of fixed uranium nuclide and associated heavy metal and preparation method thereof |
| CN115775646A (en) * | 2022-11-18 | 2023-03-10 | 中核第四研究设计工程有限公司 | Method for stabilizing uranium associated zirconium and zirconium oxide neutralization slag and stabilizing agent used in method |
| CN115775646B (en) * | 2022-11-18 | 2023-12-05 | 中核第四研究设计工程有限公司 | Method for stabilizing uranium associated zirconium and zirconium oxide neutralization residues and stabilizing agent used in method |
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Application publication date: 20190115 |