CN106398704A - Cobalt contaminated soil remediation agent and preparation method thereof - Google Patents
Cobalt contaminated soil remediation agent and preparation method thereof Download PDFInfo
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- CN106398704A CN106398704A CN201610722861.XA CN201610722861A CN106398704A CN 106398704 A CN106398704 A CN 106398704A CN 201610722861 A CN201610722861 A CN 201610722861A CN 106398704 A CN106398704 A CN 106398704A
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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
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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
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- C09K2101/00—Agricultural use
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- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
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Abstract
The invention discloses a cobalt-contaminated soil remediation agent and a preparation method thereof, the cobalt-contaminated soil remediation agent comprises the following main raw materials: 20-30 parts of diatomite, 15-20 parts of quick lime, 15-20 parts of corn stalks, 10-18 parts of triglyceride, 5-8 parts of citric acid, 2-4 parts of soda and 2-4 parts of ferroferric oxide. After soil remediation by use of the soil remediation agent, cobalt concentration in contaminated soil is decreased to below 40mg / kg, the cobalt concentration of restored soil meets requirements of secondary soil quality standards in China, and the cobalt-contaminated soil remediation agent has good economic benefits and extensive social benefits.
Description
Technical field
The present invention relates to a kind of technical field of soil remediation, specifically a kind of cobalt pollution soil-repairing agent and its preparation side
Method.
Background technology
Heavy metal pollution of soil refers to due to mankind's activity, and content in soil for the minor metallic element in soil exceedes
Background value, excess deposition and the too high levels that cause, it is referred to as heavy metal pollution of soil.And farmland soil heavy metals pollution have huge
Big hazardness, heavy metal in soil pollution not only can lead to crop production reduction and quality decline, also can pass through soil-plant
System, enters people's human body through food chain, is detrimental to health and life security.Heavy metal pollution of soil have disguise, harm delayed
Property, the biological concentration of chronicity and biological chain heavy metal the features such as, if these decide recognizing to heavy metal pollution of soil
Delayed will bring the serious consequence being difficult to expect with administering.Heavy metal pollution has been in the gesture being on the rise, to ecological environment and people
The maximum heavy metal of body health effect mainly has Hg, Cd, Pb and As etc., and the content of COBALT IN SOIL BY is 0.05-65.00 mg/kg,
Intermediate value is 8mg/kg, the soil of rock decay, and the concentration change of cobalt less, such as contains for after the basalt weathered of 59mg/kg containing cobalt
Cobalt is 81mg/kg；Cobalt, to Fructus Lycopersici esculenti, Caulis et Folium Lini, the toxic effect of Radix Betae, when cobalt concentration is 10mg/L, can cause crops dead,
The therefore improvement to cobalt pollution soil and reparation, is very urgent task.
Content of the invention
It is an object of the invention to provide a kind of cobalt pollution soil-repairing agent and preparation method thereof, to solve above-mentioned background skill
The problem proposing in art.
For achieving the above object, the present invention provides following technical scheme：
A kind of cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：Kieselguhr 20-30 part, quick lime 15-20 part,
Corn straw 15-20 part, triglyceride 10-18 part, citric acid 5-8 part, soda 2-4 part, ferroso-ferric oxide 2-4 part.
As the further scheme of the present invention：Described cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：Silicon
Diatomaceous earth 22-28 part, quick lime 16-19 part, corn straw 16-19 part, triglyceride 12-16 part, citric acid 6-7 part, soda 2-4
Part, ferroso-ferric oxide 2-4 part.
As the further scheme of the present invention：Described cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：Silicon
25 parts of diatomaceous earth, 18 parts of quick lime, 18 parts of corn straw, 14 parts of triglyceride, 7 parts of citric acid, 3 parts of soda, ferroso-ferric oxide 3
Part.
As the further scheme of the present invention：The mesh number of described quick lime is 1200 mesh.
As the further scheme of the present invention：The length of described corn straw is 320 μm.
The preparation method of described cobalt pollution soil-repairing agent, concretely comprises the following steps：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 24%-26%, be subsequently crushed to 5mm straight
The granule in footpath；
（2）Then, granule is mixed homogeneously with quick lime, corn straw, triglyceride, citric acid, mixed after piling up 18h
Thing I；
（3）Secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 37 DEG C -48 DEG C, and the time is 1-2h, obtains
Mixtures II；
（4）Then, mixtures II and soda, ferroso-ferric oxide are carried out high pressure homogenize process, mixing 5-10 divides at 45-55 DEG C
Clock, pressure is 15-20MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
（5）Finally, mixtures III is carried out micro encapsulation packaging, obtain final product cobalt pollution soil-repairing agent.
As the further scheme of the present invention：Step（1）The moisture content of middle mixture slurry is 25%.
As the further scheme of the present invention：Step（3）The temperature of middle ultrasonic Treatment is 43 DEG C, and the time is 1.5h.
As the further scheme of the present invention：Step（4）In at 50 DEG C mix 8 minutes, pressure be 18MPa.
Compared with prior art, the invention has the beneficial effects as follows：
After soil-repairing agent prepared by the present invention carries out repair process, the cobalt concentration in contaminated soil drop to 40mg/kg with
Under, after reparation, the cobalt concentration of soil meets the requirement of national second grade soil quality standard, has good economic benefit and extensively
Social benefit.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, all
Belong to the scope of protection of the invention.
Embodiment 1
A kind of cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：20 parts of kieselguhr, 15 parts of quick lime, corn stalk
15 parts of stalk, 10 parts of triglyceride, 5 parts of citric acid, 2 parts of soda, 2 parts of ferroso-ferric oxide；The mesh number of described quick lime is 1200 mesh；
The length of described corn straw is 320 μm.
The preparation method of described cobalt pollution soil-repairing agent, concretely comprises the following steps：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 24%, be subsequently crushed to 5mm diameter
Granule；
（2）Then, granule is mixed homogeneously with quick lime, corn straw, triglyceride, citric acid, mixed after piling up 18h
Thing I；
（3）Secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 37 DEG C, and the time is 1h, obtains mixture
II；
（4）Then, mixtures II and soda, ferroso-ferric oxide are carried out high pressure homogenize process, mix 5 minutes at 45 DEG C, pressure
It is by force 15MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
（5）Finally, mixtures III is carried out micro encapsulation packaging, obtain final product cobalt pollution soil-repairing agent.
Embodiment 2
A kind of cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：22 parts of kieselguhr, 16 parts of quick lime, corn stalk
16 parts of stalk, 12 parts of triglyceride, 6 parts of citric acid, 2 parts of soda, 2 parts of ferroso-ferric oxide；The mesh number of described quick lime is 1200 mesh；
The length of described corn straw is 320 μm.
The preparation method of described cobalt pollution soil-repairing agent, concretely comprises the following steps：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 24%, be subsequently crushed to 5mm diameter
Granule；
（2）Then, granule is mixed homogeneously with quick lime, corn straw, triglyceride, citric acid, mixed after piling up 18h
Thing I；
（3）Secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 37 DEG C, and the time is 1h, obtains mixture
II；
（4）Then, mixtures II and soda, ferroso-ferric oxide are carried out high pressure homogenize process, mix 5 minutes at 45 DEG C, pressure
It is by force 15MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
（5）Finally, mixtures III is carried out micro encapsulation packaging, obtain final product cobalt pollution soil-repairing agent.
Embodiment 3
A kind of cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：25 parts of kieselguhr, 18 parts of quick lime, corn stalk
18 parts of stalk, 14 parts of triglyceride, 7 parts of citric acid, 3 parts of soda, 3 parts of ferroso-ferric oxide；The mesh number of described quick lime is 1200 mesh；
The length of described corn straw is 320 μm.
The preparation method of described cobalt pollution soil-repairing agent, concretely comprises the following steps：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 25%, be subsequently crushed to 5mm diameter
Granule；
（2）Then, granule is mixed homogeneously with quick lime, corn straw, triglyceride, citric acid, mixed after piling up 18h
Thing I；
（3）Secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 43 DEG C, and the time is 1.5h, is mixed
Thing II；
（4）Then, mixtures II and soda, ferroso-ferric oxide are carried out high pressure homogenize process, mix 8 minutes at 50 DEG C, pressure
It is by force 18MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
（5）Finally, mixtures III is carried out micro encapsulation packaging, obtain final product cobalt pollution soil-repairing agent.
Embodiment 4
A kind of cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：28 parts of kieselguhr, 19 parts of quick lime, corn stalk
19 parts of stalk, 16 parts of triglyceride, 7 parts of citric acid, 4 parts of soda, 4 parts of ferroso-ferric oxide；The mesh number of described quick lime is 1200 mesh；
The length of described corn straw is 320 μm.
The preparation method of described cobalt pollution soil-repairing agent, concretely comprises the following steps：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 26%, be subsequently crushed to 5mm diameter
Granule；
（2）Then, granule is mixed homogeneously with quick lime, corn straw, triglyceride, citric acid, mixed after piling up 18h
Thing I；
（3）Secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 48 DEG C, and the time is 2h, obtains mixture
II；
（4）Then, mixtures II and soda, ferroso-ferric oxide are carried out high pressure homogenize process, mix 10 minutes at 55 DEG C, pressure
It is by force 20MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
（5）Finally, mixtures III is carried out micro encapsulation packaging, obtain final product cobalt pollution soil-repairing agent.
Embodiment 5
A kind of cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：30 parts of kieselguhr, 20 parts of quick lime, corn stalk
20 parts of stalk, 18 parts of triglyceride, 8 parts of citric acid, 4 parts of soda, 4 parts of ferroso-ferric oxide；The mesh number of described quick lime is 1200 mesh；
The length of described corn straw is 320 μm.
The preparation method of described cobalt pollution soil-repairing agent, concretely comprises the following steps：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 26%, be subsequently crushed to 5mm diameter
Granule；
（2）Then, granule is mixed homogeneously with quick lime, corn straw, triglyceride, citric acid, mixed after piling up 18h
Thing I；
（3）Secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 48 DEG C, and the time is 2h, obtains mixture
II；
（4）Then, mixtures II and soda, ferroso-ferric oxide are carried out high pressure homogenize process, mix 10 minutes at 55 DEG C, pressure
It is by force 20MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
（5）Finally, mixtures III is carried out micro encapsulation packaging, obtain final product cobalt pollution soil-repairing agent.
Comparative example 1
A kind of cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：25 parts of kieselguhr, 18 parts of corn straw, Fructus Citri Limoniae
7 parts of acid, 3 parts of soda, 3 parts of ferroso-ferric oxide；The length of described corn straw is 320 μm.
The preparation method of described cobalt pollution soil-repairing agent, concretely comprises the following steps：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 25%, be subsequently crushed to 5mm diameter
Granule；
（2）Then, granule is mixed homogeneously with corn straw, citric acid, after piling up 18h, obtain mixture I；
（3）Secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 43 DEG C, and the time is 1.5h, is mixed
Thing II；
（4）Then, mixtures II and soda, ferroso-ferric oxide are carried out high pressure homogenize process, mix 8 minutes at 50 DEG C, pressure
It is by force 18MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
（5）Finally, mixtures III is carried out micro encapsulation packaging, obtain final product cobalt pollution soil-repairing agent.
Comparative example 2
A kind of cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：25 parts of kieselguhr, 18 parts of corn straw；Described
The length of corn straw is 320 μm.
The preparation method of described cobalt pollution soil-repairing agent, concretely comprises the following steps：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 25%, be subsequently crushed to 5mm diameter
Granule；
（2）Then, granule is mixed homogeneously with corn straw, after piling up 18h, obtain cobalt pollution soil-repairing agent.
Comparative example 3
A kind of cobalt pollution soil-repairing agent, the primary raw material according to weight portion is：25 parts of kieselguhr, 18 parts of quick lime, corn stalk
18 parts of stalk, 14 parts of triglyceride, 7 parts of citric acid, 3 parts of soda, 3 parts of ferroso-ferric oxide；The mesh number of described quick lime is 1200 mesh；
The length of described corn straw is 320 μm.
The preparation method of described cobalt pollution soil-repairing agent, concretely comprises the following steps：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 25%, be subsequently crushed to 5mm diameter
Granule；
（2）Then, granule is mixed homogeneously with quick lime, corn straw, triglyceride, citric acid, mixed after piling up 18h
Thing I；
（3）Then, mixture I is carried out high pressure homogenize process with soda, ferroso-ferric oxide, mix 8 minutes at 50 DEG C, pressure
For 18MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures II；
（4）Finally, mixtures II is carried out micro encapsulation packaging, obtain final product cobalt pollution soil-repairing agent.
Test experience
Excavated to polluting soil to be repaired using excavator, by the cobalt in above-described embodiment 1-5 and comparative example 1-3
After contaminated soil remediation agent is added on the renovation agent of surface applying 2cm thickness of contaminated soil, by polluted soil top layer
The thick soil of 20cm is mixed homogeneously by way of turning over the renovation agent applying, and after 10 days, carries out sampling monitoring, test knot
Fruit chart 1
.
As can be seen here, the cobalt pollution soil-repairing agent prepared in the embodiment of the present invention, has more preferable showing with contrast groups example ratio
Write treatment effect, the present invention can make the physical and chemical index by cobalt severe contamination soil reach GB15618-2008 standard；Place's science and engineering
Skill is simple, and dosage is few, and treatment effect is good, stable performance, and contaminated soil restoration degree is high, can significantly reduce cobalt
The cost that contaminated soil is processed, has good economic benefit and extensive social benefit.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment only wraps
Containing an independent technical scheme, only for clarity, those skilled in the art should for this narrating mode of description
Using description as an entirety, the technical scheme in each embodiment can also form those skilled in the art through appropriately combined
Understandable other embodiment.
Claims (9)
1. a kind of cobalt pollution soil-repairing agent is it is characterised in that the primary raw material according to weight portion is：Kieselguhr 20-30 part, life
Calx 15-20 part, corn straw 15-20 part, triglyceride 10-18 part, citric acid 5-8 part, soda 2-4 part, ferroso-ferric oxide
2-4 part.
2. cobalt pollution soil-repairing agent according to claim 1, it is characterised in that described cobalt pollution soil-repairing agent, is pressed
Primary raw material according to weight portion is：Kieselguhr 22-28 part, quick lime 16-19 part, corn straw 16-19 part, triglyceride 12-
16 parts, citric acid 6-7 part, soda 2-4 part, ferroso-ferric oxide 2-4 part.
3. cobalt pollution soil-repairing agent according to claim 1 and 2 is it is characterised in that described cobalt pollution soil-repairing agent,
Primary raw material according to weight portion is：25 parts of kieselguhr, 18 parts of quick lime, 18 parts of corn straw, 14 parts of triglyceride, citric acid
7 parts, 3 parts of soda, 3 parts of ferroso-ferric oxide.
4. cobalt pollution soil-repairing agent according to claim 3 is it is characterised in that the mesh number of described quick lime is 1200
Mesh.
5. cobalt pollution soil-repairing agent according to claim 3 is it is characterised in that the length of described corn straw is 320 μ
m.
6. a kind of preparation method of described cobalt pollution soil-repairing agent as arbitrary in claim 1-5 is it is characterised in that concrete walk
Suddenly it is：
（1）First, add water in kieselguhr and obtain mixture slurry so as to moisture content is 24%-26%, be subsequently crushed to 5mm straight
The granule in footpath；
（2）Then, granule is mixed homogeneously with quick lime, corn straw, triglyceride, citric acid, mixed after piling up 18h
Thing I；
（3）Secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 37 DEG C -48 DEG C, and the time is 1-2h, obtains
Mixtures II；
（4）Then, mixtures II and soda, ferroso-ferric oxide are carried out high pressure homogenize process, mixing 5-10 divides at 45-55 DEG C
Clock, pressure is 15-20MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
（5）Finally, mixtures III is carried out micro encapsulation packaging, obtain final product cobalt pollution soil-repairing agent.
7. the preparation method of cobalt pollution soil-repairing agent according to claim 6 is it is characterised in that step（1）Middle mixing
The moisture content of slurry is 25%.
8. the preparation method of cobalt pollution soil-repairing agent according to claim 6 is it is characterised in that step（3）In ultrasonic
The temperature that ripple is processed is 43 DEG C, and the time is 1.5h.
9. the preparation method of cobalt pollution soil-repairing agent according to claim 6 is it is characterised in that step（4）In 50
Mix 8 minutes at DEG C, pressure is 18MPa.
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| CN201610722861.XA CN106398704A (en) | 2016-08-25 | 2016-08-25 | Cobalt contaminated soil remediation agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610722861.XA CN106398704A (en) | 2016-08-25 | 2016-08-25 | Cobalt contaminated soil remediation agent and preparation method thereof |
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Family
ID=58004812
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