CN106190166A - A kind of nickel contamination soil-repairing agent and preparation method thereof - Google Patents
A kind of nickel contamination soil-repairing agent and preparation method thereof Download PDFInfo
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- CN106190166A CN106190166A CN201610722589.5A CN201610722589A CN106190166A CN 106190166 A CN106190166 A CN 106190166A CN 201610722589 A CN201610722589 A CN 201610722589A CN 106190166 A CN106190166 A CN 106190166A
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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
Abstract
The invention discloses a kind of nickel contamination soil-repairing agent and preparation method thereof, described nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: 20 30 parts of polyaniline surface modification kieselguhr, polylactic acid 20 30 parts, corn straw 15 20 parts, 1 methyl 2 ketopyrrolidine 10 18 parts, vinyl acetate 10 15 parts, 10 15 parts of bean dregs, 48 parts of sodium sulfate.After soil-repairing agent prepared by the present invention carries out repair process, the nickel concentration in contaminated soil drops to below 40mg/kg, and after reparation, the nickel concentration of soil meets the requirement of country's second grade soil quality standard, has good economic benefit and social benefit widely.
Description
Technical field
The present invention relates to a kind of technical field of soil remediation, specifically a kind of nickel contamination soil-repairing agent and preparation side thereof
Method.
Background technology
Heavy metal pollution of soil refers to that, due to mankind's activity, the content in soil of the minor metallic element in soil exceedes
Background value, excess deposition and the too high levels that causes, it is referred to as heavy metal pollution of soil.And farmland soil heavy metals pollution has huge
Big hazardness, heavy metal in soil pollutes and crop production reduction and quality not only can be caused to 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 feature such as biological concentration of chronicity and biological chain heavy metal, if these decide, heavy metal pollution of soil is recognized
Delayed the serious consequence being difficult to expect will be brought with administering.Heavy metal pollution is in the gesture being on the rise, to ecological environment and people
The heavy metal of body health effect maximum mainly has Hg, Cd, Pb and As etc., and the main source of nickel contamination has three: 1, mining is discarded
Ground, China's nickel reserves reach 867.72 ten thousand tons, and the mass fraction of average nickel is 0.2%-7%, be distributed widely in Gansu, Xinjiang, Sichuan,
18 provinces and regions such as Yunnan, Guangdong, Jilin, Hubei, the mine tailing of mining, barren rock, stripping soil etc. all can cause pollution；2, high background is nickeliferous
Soil, the general nickel content of serpentinite is high, and nickel serpentine cat’s-eye nickel content should up to 500-1000 mg/kg, such as Xinyi, Guangdong
Class SOIL DISTRIBUTION reaches 1000hm3；3, human activity contaminated soil, owing to nickel is widely used in electrical industry, chemical industry, machine
In tool industry, building industry and food industry, thus also result in serious environmental pollution；Therefore the improvement to nickel contamination soil
And reparation, it is the most urgent task.
Summary of the invention
It is an object of the invention to provide a kind of nickel contamination soil-repairing agent and preparation method thereof, to solve above-mentioned background skill
The problem proposed in art.
For achieving the above object, the present invention provides following technical scheme:
A kind of nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: polyaniline surface modification kieselguhr 20-30 part,
Polylactic acid 20-30 part, corn straw 15-20 part, 1-Methyl-2-Pyrrolidone 10-18 part, vinyl acetate 10-15 part, bean dregs
10-15 part, sodium sulfate 4-8 part.
As the further scheme of the present invention: described nickel contamination soil-repairing agent, according to the primary raw material of weight portion it is: poly-
Aniline surface modification kieselguhr 23-27 part, polylactic acid 24-26 part, corn straw 16-19 part, 1-Methyl-2-Pyrrolidone 12-
16 parts, vinyl acetate 11-14 part, bean dregs 12-13 part, sodium sulfate 5-7 part.
As the further scheme of the present invention: described nickel contamination soil-repairing agent, according to the primary raw material of weight portion it is: poly-
25 parts of aniline surface modification kieselguhr, polylactic acid 25 parts, corn straw 18 parts, 1-Methyl-2-Pyrrolidone 14 parts, vinyl acetate
Ester 13 parts, 13 parts of bean dregs, 6 parts of sodium sulfate.
Described nickel contamination soil-repairing agent, a length of 450 μm of described corn straw.
The preparation method of described nickel contamination soil-repairing agent, concretely comprises the following steps:
(1) first, add water in polyaniline surface modification kieselguhr and obtain mixture slurry so that it is moisture content is 15%-18%, subsequently
It is crushed to the granule of 5mm diameter；
(2) then, granule is mixed homogeneously with polylactic acid, corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 45 DEG C-50 DEG C, and the time is 1-2h, obtains
Mixtures II；
(4) then, mixtures II and 1-Methyl-2-Pyrrolidone, vinyl acetate, sodium sulfate are carried out high pressure homogenize process,
Mixing 5-10 minute at 42-50 DEG C, pressure is 15-20MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixture
III；
(5) last, mixtures III is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
As the further scheme of the present invention: in step (1), the moisture content of mixture slurry is 37%.
As the further scheme of the present invention: in step (3), the temperature of ultrasonic Treatment is 48 DEG C, the time is 1.5h.
As the further scheme of the present invention: mixing 8 minutes at 46 DEG C in step (4), pressure is 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 nickel concentration in contaminated soil drop to 40mg/kg with
Under, after reparation, the nickel concentration of soil meets the requirement of country's second grade soil quality standard, has good economic benefit with extensive
Social benefit.
Detailed description of the invention
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 not making creative work premise, all
Belong to the scope of protection of the invention.
Embodiment 1
A kind of nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: 20 parts of polyaniline surface modification kieselguhr, poly-breast
Acid 20 parts, corn straw 15 parts, 1-Methyl-2-Pyrrolidone 10 parts, vinyl acetate 10 parts, 10 parts of bean dregs, 4 parts of sodium sulfate；
A length of 450 μm of described corn straw.
The preparation method of described nickel contamination soil-repairing agent, concretely comprises the following steps:
(1) first, add water in polyaniline surface modification kieselguhr and obtain mixture slurry so that it is moisture content is 15%, extrudes subsequently
Make the granule of 5mm diameter；
(2) then, granule is mixed homogeneously with polylactic acid, corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 45 DEG C, and the time is 1h, obtains mixture
II；
(4) then, mixtures II and 1-Methyl-2-Pyrrolidone, vinyl acetate, sodium sulfate are carried out high pressure homogenize process,
Mixing 5 minutes at 42 DEG C, pressure is 15MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
(5) last, mixtures III is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
Embodiment 2
A kind of nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: 23 parts of polyaniline surface modification kieselguhr, poly-breast
Acid 24 parts, corn straw 16 parts, 1-Methyl-2-Pyrrolidone 12 parts, vinyl acetate 11 parts, 12 parts of bean dregs, 5 parts of sodium sulfate；
A length of 450 μm of described corn straw.
The preparation method of described nickel contamination soil-repairing agent, concretely comprises the following steps:
(1) first, add water in polyaniline surface modification kieselguhr and obtain mixture slurry so that it is moisture content is 15%, extrudes subsequently
Make the granule of 5mm diameter；
(2) then, granule is mixed homogeneously with polylactic acid, corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 45 DEG C, and the time is 1h, obtains mixture
II；
(4) then, mixtures II and 1-Methyl-2-Pyrrolidone, vinyl acetate, sodium sulfate are carried out high pressure homogenize process,
Mixing 5 minutes at 42 DEG C, pressure is 15MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
(5) last, mixtures III is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
Embodiment 3
A kind of nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: 25 parts of polyaniline surface modification kieselguhr, poly-breast
Acid 25 parts, corn straw 18 parts, 1-Methyl-2-Pyrrolidone 14 parts, vinyl acetate 13 parts, 13 parts of bean dregs, 6 parts of sodium sulfate.
Described nickel contamination soil-repairing agent, a length of 450 μm of described corn straw.
The preparation method of described nickel contamination soil-repairing agent, concretely comprises the following steps:
(1) first, add water in polyaniline surface modification kieselguhr and obtain mixture slurry so that it is moisture content is 17%, extrudes subsequently
Make the granule of 5mm diameter；
(2) then, granule is mixed homogeneously with polylactic acid, corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 48 DEG C, and the time is 1.5h, is mixed
Thing II；
(4) then, mixtures II and 1-Methyl-2-Pyrrolidone, vinyl acetate, sodium sulfate are carried out high pressure homogenize process,
Mixing 8 minutes at 46 DEG C, pressure is 18MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
(5) last, mixtures III is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
Embodiment 4
A kind of nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: 27 parts of polyaniline surface modification kieselguhr, poly-breast
Acid 26 parts, corn straw 19 parts, 1-Methyl-2-Pyrrolidone 16 parts, vinyl acetate 14 parts, 13 parts of bean dregs, 7 parts of sodium sulfate；
A length of 450 μm of described corn straw.
The preparation method of described nickel contamination soil-repairing agent, concretely comprises the following steps:
(1) first, add water in polyaniline surface modification kieselguhr and obtain mixture slurry so that it is moisture content is 18%, extrudes subsequently
Make the granule of 5mm diameter；
(2) then, granule is mixed homogeneously with polylactic acid, corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 50 DEG C, and the time is 2h, obtains mixture
II；
(4) then, mixtures II and 1-Methyl-2-Pyrrolidone, vinyl acetate, sodium sulfate are carried out high pressure homogenize process,
Mixing 10 minutes at 50 DEG C, pressure is 20MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
(5) last, mixtures III is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
Embodiment 5
A kind of nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: 30 parts of polyaniline surface modification kieselguhr, poly-breast
Acid 30 parts, corn straw 20 parts, 1-Methyl-2-Pyrrolidone 18 parts, vinyl acetate 15 parts, 15 parts of bean dregs, 8 parts of sodium sulfate；
A length of 450 μm of described corn straw.
The preparation method of described nickel contamination soil-repairing agent, concretely comprises the following steps:
(1) first, add water in polyaniline surface modification kieselguhr and obtain mixture slurry so that it is moisture content is 18%, extrudes subsequently
Make the granule of 5mm diameter；
(2) then, granule is mixed homogeneously with polylactic acid, corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 50 DEG C, and the time is 2h, obtains mixture
II；
(4) then, mixtures II and 1-Methyl-2-Pyrrolidone, vinyl acetate, sodium sulfate are carried out high pressure homogenize process,
Mixing 10 minutes at 50 DEG C, pressure is 20MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
(5) last, mixtures III is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
Comparative example 1
A kind of nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: 25 parts of polyaniline surface modification kieselguhr, Semen Maydis
Straw 18 parts, 13 parts of bean dregs, 6 parts of sodium sulfate.
Described nickel contamination soil-repairing agent, a length of 450 μm of described corn straw.
The preparation method of described nickel contamination soil-repairing agent, concretely comprises the following steps:
(1) first, add water in polyaniline surface modification kieselguhr and obtain mixture slurry so that it is moisture content is 17%, extrudes subsequently
Make the granule of 5mm diameter；
(2) then, granule is mixed homogeneously with corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 48 DEG C, and the time is 1.5h, is mixed
Thing II；
(4) then, mixtures II and sodium sulfate being carried out high pressure homogenize process, mix 8 minutes at 46 DEG C, pressure is 18MPa；
Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
(5) last, mixtures III is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
Comparative example 2
A kind of nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: 25 parts of kieselguhr, corn straw 18 parts, bean dregs
13 parts, 6 parts of sodium sulfate.
Described nickel contamination soil-repairing agent, a length of 450 μm of described corn straw.
The preparation method of described nickel contamination soil-repairing agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and obtain mixture slurry so that it is moisture content is 17%, is crushed to 5mm diameter subsequently
Granule；
(2) then, granule is mixed homogeneously with corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 48 DEG C, and the time is 1.5h, is mixed
Thing II；
(4) then, mixtures II and sodium sulfate being carried out high pressure homogenize process, mix 8 minutes at 46 DEG C, pressure is 18MPa；
Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures III；
(5) last, mixtures III is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
Comparative example 3
A kind of nickel contamination soil-repairing agent, according to the primary raw material of weight portion be: 25 parts of polyaniline surface modification kieselguhr, poly-breast
Acid 25 parts, corn straw 18 parts, 1-Methyl-2-Pyrrolidone 14 parts, vinyl acetate 13 parts, 13 parts of bean dregs, 6 parts of sodium sulfate.
Described nickel contamination soil-repairing agent, a length of 450 μm of described corn straw.
The preparation method of described nickel contamination soil-repairing agent, concretely comprises the following steps:
(1) first, add water in polyaniline surface modification kieselguhr and obtain mixture slurry so that it is moisture content is 17%, extrudes subsequently
Make the granule of 5mm diameter；
(2) then, granule is mixed homogeneously with polylactic acid, corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) then, mixture I is carried out high pressure homogenize process with 1-Methyl-2-Pyrrolidone, vinyl acetate, sodium sulfate,
Mixing 8 minutes at 46 DEG C, pressure is 18MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixtures II；
(4) last, mixtures II is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
Test experience
Excavator is utilized to excavate, by the nickel in above-described embodiment 1-5 and comparative example 1-3 polluting soil to be repaired
After contaminated soil remediation agent is added on the renovation agent of surface applying 2cm thickness of contaminated soil, by polluted soil top layer
Soil thick for 20cm is mixed homogeneously by the way of turning over the renovation agent of applying, after 10 days, carries out sampling monitoring, test knot
Fruit is such as table 1
。
As can be seen here, the nickel contamination soil-repairing agent of preparation in the embodiment of the present invention, have more preferable aobvious with contrast groups example ratio
Writing treatment effect, the present invention can make the physical and chemical index by nickel severe contamination soil reach GB15618-1995 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 nickel
The cost that contaminated soil processes, has good economic benefit and social benefit widely.
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, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment 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 by fall in the implication of equivalency and scope of claim
Change is included in the present invention.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (8)
1. a nickel contamination soil-repairing agent, it is characterised in that be according to the primary raw material of weight portion: polyaniline surface modification silicon
Diatomaceous earth 20-30 part, polylactic acid 20-30 part, corn straw 15-20 part, 1-Methyl-2-Pyrrolidone 10-18 part, vinyl acetate
10-15 part, bean dregs 10-15 part, sodium sulfate 4-8 part.
Nickel contamination soil-repairing agent the most according to claim 1, it is characterised in that described nickel contamination soil-repairing agent, presses
Primary raw material according to weight portion is: polyaniline surface modification kieselguhr 23-27 part, polylactic acid 24-26 part, corn straw 16-19
Part, 1-Methyl-2-Pyrrolidone 12-16 part, vinyl acetate 11-14 part, bean dregs 12-13 part, sodium sulfate 5-7 part.
Nickel contamination soil-repairing agent the most according to claim 1 and 2, it is characterised in that described nickel contamination soil-repairing agent,
It is 25 parts of polyaniline surface modification kieselguhr, polylactic acid 25 parts, corn straw 18 parts, 1-first according to the primary raw material of weight portion
Base-2-Pyrrolidone 14 parts, vinyl acetate 13 parts, 13 parts of bean dregs, 6 parts of sodium sulfate.
Nickel contamination soil-repairing agent the most according to claim 3, it is characterised in that a length of 450 μ of described corn straw
m。
5. the preparation method of the nickel contamination soil-repairing agent as described in claim 1-4 is arbitrary, it is characterised in that specifically walk
Suddenly it is:
(1) first, add water in polyaniline surface modification kieselguhr and obtain mixture slurry so that it is moisture content is 15%-18%, subsequently
It is crushed to the granule of 5mm diameter；
(2) then, granule is mixed homogeneously with polylactic acid, corn straw, bean dregs, after piling up 18h, obtain mixture I；
(3) secondly, mixture I carries out ultrasonic Treatment, and the temperature of ultrasonic Treatment is 45 DEG C-50 DEG C, and the time is 1-2h, obtains
Mixtures II；
(4) then, mixtures II and 1-Methyl-2-Pyrrolidone, vinyl acetate, sodium sulfate are carried out high pressure homogenize process,
Mixing 5-10 minute at 42-50 DEG C, pressure is 15-20MPa；Oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtains mixture
III；
(5) last, mixtures III is carried out micro encapsulation packaging, obtains nickel contamination soil-repairing agent.
The preparation method of nickel contamination soil-repairing agent the most according to claim 5, it is characterised in that mixing in step (1)
The moisture content of slurry is 17%.
The preparation method of nickel contamination soil-repairing agent the most according to claim 5, it is characterised in that ultrasonic in step (3)
The temperature that ripple processes is 48 DEG C, and the time is 1.5h.
The preparation method of nickel contamination soil-repairing agent the most according to claim 5, it is characterised in that 46 in step (4)
Mixing 8 minutes at DEG C, pressure is 18MPa.
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| CN201610722589.5A CN106190166A (en) | 2016-08-25 | 2016-08-25 | A kind of nickel contamination soil-repairing agent and preparation method thereof |
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| CN201610722589.5A CN106190166A (en) | 2016-08-25 | 2016-08-25 | A kind of nickel contamination soil-repairing agent and preparation method thereof |
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| CN112779022A (en) * | 2021-01-15 | 2021-05-11 | 清华大学 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
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Application publication date: 20161207 |
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| RJ01 | Rejection of invention patent application after publication |