CN106118684A - A kind of lead-contaminated soil renovation agent and preparation method thereof - Google Patents
A kind of lead-contaminated soil renovation agent and preparation method thereof Download PDFInfo
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- CN106118684A CN106118684A CN201610546158.8A CN201610546158A CN106118684A CN 106118684 A CN106118684 A CN 106118684A CN 201610546158 A CN201610546158 A CN 201610546158A CN 106118684 A CN106118684 A CN 106118684A
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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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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a kind of lead-contaminated soil renovation agent and preparation method thereof, described lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: 35 40 parts of kieselguhr, 25 35 parts of humus, 10 25 parts of discarded fallen leaves, 10 20 parts of zeolite, chitosan 10 15 parts, sodium alginate 58 parts, oxalic acid 26 parts.The present invention can make to be reached GB15618 1995 standard by the physical and chemical index of lead severe contamination soil；Process technique is simple, and dosage is few, and treatment effect is good, stable performance, and contaminated soil restoration degree is high, can significantly reduce the cost that lead-contaminated soil processes, and 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 lead-contaminated soil renovation agent and preparation side thereof
Method.
Background technology
Lead is one of heavy metal element the strongest to plant, animal and human toxicity in environment.Heavy metal in soil lead
Pollute essentially from dirt filling, solid waste, exploitation and smelting and the traffic exhaust gas etc. of leaded heavy metal mineral products.Traffic exhaust gas
Can cause the soil pollution of roadside, and then cause lead content in the vegetable of polluted soil to exceed standard, lead once enters human body
After, by the normal work by blood interference neurocyte, destroy the existence of haemachrome and the infiltration of cerebral microvascular in blood
Property, may result in brain development slow, unsound, finally affect the intelligence of people, therefore improvement and the reparation to lead-contaminated soil, be
The most urgent task.
Summary of the invention
It is an object of the invention to provide a kind of lead-contaminated soil renovation 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 lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: kieselguhr 35-40 part, humus 25-35
Part, discarded fallen leaves 10-25 part, zeolite 10-20 part, chitosan 10-15 part, sodium alginate 5-8 part, oxalic acid 2-6 part.
As the further scheme of the present invention: described lead-contaminated soil renovation agent, according to the primary raw material of weight portion it is: silicon
Diatomaceous earth 36-39 part, humus 28-32 part, discarded fallen leaves 14-21 part, zeolite 13-17 part, chitosan 11-14 part, sodium alginate
6-7 part, oxalic acid 3-5 part.
As the further scheme of the present invention: described lead-contaminated soil renovation agent, according to the primary raw material of weight portion it is: silicon
Diatomaceous earth 38 parts, 30 parts of humus, 18 parts of discarded fallen leaves, 15 parts of zeolite, chitosan 13 parts, sodium alginate 7 parts, oxalic acid 4 parts.
As the further scheme of the present invention: the particle diameter of described zeolite is 800-900 μm.
As the further scheme of the present invention: the particle diameter of described chitosan is 400-600 μm.
The preparation method of described lead-contaminated soil renovation agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 20%-24%, subsequently
It is crushed to the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, zeolite, chitosan, after piling up 12h, obtain mixture I；
(3) secondly, mixture I carries out microwave treatment, and the temperature of microwave treatment is 55 DEG C-65 DEG C, and the time is that 40-50 divides
Clock, obtains mixtures II；
(4) then, mixtures II and sodium alginate, oxalic acid are carried out steam extraction, process 10 minutes at 78-84 DEG C,
Pressure is 2-3MPa；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 lead-contaminated soil renovation agent.
As the further scheme of the present invention: in step (1), the moisture content of mixture slurry is 22%.
As the further scheme of the present invention: in step (3), the temperature of microwave treatment is 60 DEG C, the time is 45 minutes.
As the further scheme of the present invention: mixing 10 minutes at 81 DEG C in step (4), pressure is 2.5MPa.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention can make the physical and chemical index by lead severe contamination soil reach GB15618-1995 standard；The letter of process technique
Single, dosage is few, and treatment effect is good, stable performance, and contaminated soil restoration degree is high, can significantly reduce lead contamination
The cost of soil treatment, has good economic benefit and social benefit widely.
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 lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: 35 parts of kieselguhr, 25 parts of humus, useless
Abandon 10 parts of fallen leaves, 10 parts of zeolite, chitosan 10 parts, sodium alginate 5 parts, oxalic acid 2 parts；The particle diameter of described zeolite is 800 μm；Described
The particle diameter of chitosan is 400 μm.
The preparation method of described lead-contaminated soil renovation agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 20%, extrudes subsequently
Make the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, zeolite, chitosan, after piling up 12h, obtain mixture I；
(3) secondly, mixture I carries out microwave treatment, and the temperature of microwave treatment is 55 DEG C, and the time is 40 minutes, is mixed
Compound II；
(4) then, mixtures II and sodium alginate, oxalic acid are carried out steam extraction, process 10 minutes at 78 DEG C, pressure
For 2MPa；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 lead-contaminated soil renovation agent.
Embodiment 2
A kind of lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: 36 parts of kieselguhr, 28 parts of humus, useless
Abandon 14 parts of fallen leaves, 13 parts of zeolite, chitosan 11 parts, sodium alginate 6 parts, oxalic acid 3 parts；The particle diameter of described zeolite is 827 μm；Described
The particle diameter of chitosan is 480 μm.
The preparation method of described lead-contaminated soil renovation agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 20%, extrudes subsequently
Make the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, zeolite, chitosan, after piling up 12h, obtain mixture I；
(3) secondly, mixture I carries out microwave treatment, and the temperature of microwave treatment is 55 DEG C, and the time is 40 minutes, is mixed
Compound II；
(4) then, mixtures II and sodium alginate, oxalic acid are carried out steam extraction, process 10 minutes at 78 DEG C, pressure
For 2MPa；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 lead-contaminated soil renovation agent.
Embodiment 3
A kind of lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: 38 parts of kieselguhr, 30 parts of humus, useless
Abandon 18 parts of fallen leaves, 15 parts of zeolite, chitosan 13 parts, sodium alginate 7 parts, oxalic acid 4 parts；The particle diameter of described zeolite is 855 μm；Described
The particle diameter of chitosan is 520 μm.
The preparation method of described lead-contaminated soil renovation agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 22%, extrudes subsequently
Make the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, zeolite, chitosan, after piling up 12h, obtain mixture I；
(3) secondly, mixture I carries out microwave treatment, and the temperature of microwave treatment is 60, and the time is 45 minutes, is mixed
Thing II；
(4) then, mixtures II and sodium alginate, oxalic acid are carried out steam extraction, process 10 minutes at 78-84 DEG C,
Pressure is 2.5MPa；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 lead-contaminated soil renovation agent.
Embodiment 4
A kind of lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: 39 parts of kieselguhr, 32 parts of humus, useless
Abandon 21 parts of fallen leaves, 17 parts of zeolite, chitosan 14 parts, sodium alginate 7 parts, oxalic acid 5 parts；The particle diameter of described zeolite is 878 μm；Described
The particle diameter of chitosan is 534 μm.
The preparation method of described lead-contaminated soil renovation agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 24%, extrudes subsequently
Make the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, zeolite, chitosan, after piling up 12h, obtain mixture I；
(3) secondly, mixture I carries out microwave treatment, and the temperature of microwave treatment is 65 DEG C, and the time is 50 minutes, is mixed
Compound II；
(4) then, mixtures II and sodium alginate, oxalic acid are carried out steam extraction, process 10 minutes at 84 DEG C, pressure
For 3MPa；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 lead-contaminated soil renovation agent.
Embodiment 5
A kind of lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: 40 parts of kieselguhr, 35 parts of humus, useless
Abandon 25 parts of fallen leaves, 20 parts of zeolite, chitosan 15 parts, sodium alginate 8 parts, oxalic acid 6 parts；The particle diameter of described zeolite is 900 μm；Described
The particle diameter of chitosan is 600 μm.
The preparation method of described lead-contaminated soil renovation agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 24%, extrudes subsequently
Make the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, zeolite, chitosan, after piling up 12h, obtain mixture I；
(3) secondly, mixture I carries out microwave treatment, and the temperature of microwave treatment is 65 DEG C, and the time is 50 minutes, is mixed
Compound II；
(4) then, mixtures II and sodium alginate, oxalic acid are carried out steam extraction, process 10 minutes at 84 DEG C, pressure
For 3MPa；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 lead-contaminated soil renovation agent.
Comparative example 1
A kind of lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: 38 parts of kieselguhr, 30 parts of humus, useless
Abandon 18 parts of fallen leaves, sodium alginate 7 parts, oxalic acid 4 parts.
The preparation method of described lead-contaminated soil renovation agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 22%, extrudes subsequently
Make the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, after piling up 12h, obtains mixture I；
(3) secondly, mixture I carries out microwave treatment, and the temperature of microwave treatment is 60, and the time is 45 minutes, is mixed
Thing II；
(4) then, mixtures II and sodium alginate, oxalic acid are carried out steam extraction, process 10 minutes at 78-84 DEG C,
Pressure is 2.5MPa；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 lead-contaminated soil renovation agent.
Comparative example 2
A kind of lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: 38 parts of kieselguhr, 30 parts of humus, useless
Abandon 18 parts of fallen leaves.
The preparation method of described lead-contaminated soil renovation agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 22%, extrudes subsequently
Make the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, after piling up 12h, obtains mixture I；
(3) secondly, mixture I carries out microwave treatment, and the temperature of microwave treatment is 60, and the time is 45 minutes, is mixed
Thing II；
(4) then, oven drying at low temperature at a temperature of mixtures II is subsequently placed at 8 DEG C, obtain lead-contaminated soil renovation agent.
Comparative example 3
A kind of lead-contaminated soil renovation agent, according to the primary raw material of weight portion be: 38 parts of kieselguhr, 30 parts of humus, useless
Abandon 18 parts of fallen leaves, 15 parts of zeolite, chitosan 13 parts, sodium alginate 7 parts, oxalic acid 4 parts；The particle diameter of described zeolite is 855 μm；Described
The particle diameter of chitosan is 520 μm.
The preparation method of described lead-contaminated soil renovation agent, concretely comprises the following steps:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 22%, extrudes subsequently
Make the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, zeolite, chitosan, after piling up 12h, obtain mixture I；
(3) then, mixture I is carried out steam extraction with sodium alginate, oxalic acid, process 10 minutes at 78-84 DEG C, pressure
Strong is 2.5MPa；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 lead-contaminated soil renovation agent.
Test experience
Excavator is utilized to excavate, by the lead 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 result
Chart 1.
As can be seen here, the lead-contaminated soil renovation 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 lead 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 lead
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 (9)
1. a lead-contaminated soil renovation agent, it is characterised in that be according to the primary raw material of weight portion: kieselguhr 35-40 part, corruption
Grow matter 25-35 part, discarded fallen leaves 10-25 part, zeolite 10-20 part, chitosan 10-15 part, sodium alginate 5-8 part, oxalic acid 2-6
Part.
Lead-contaminated soil renovation agent the most according to claim 1, it is characterised in that described lead-contaminated soil renovation agent, presses
Primary raw material according to weight portion is: kieselguhr 36-39 part, humus 28-32 part, discarded fallen leaves 14-21 part, zeolite 13-17 part,
Chitosan 11-14 part, sodium alginate 6-7 part, oxalic acid 3-5 part.
Lead-contaminated soil renovation agent the most according to claim 1 and 2, it is characterised in that described lead-contaminated soil renovation agent,
According to the primary raw material of weight portion it is: 38 parts of kieselguhr, 30 parts of humus, 18 parts of discarded fallen leaves, 15 parts of zeolite, chitosan 13
Part, sodium alginate 7 parts, oxalic acid 4 parts.
Lead-contaminated soil renovation agent the most according to claim 3, it is characterised in that the particle diameter of described zeolite is 800-900 μ
m。
Lead-contaminated soil renovation agent the most according to claim 3, it is characterised in that the particle diameter of described chitosan is 400-
600μm。
6. the preparation method of the lead-contaminated soil renovation agent as described in claim 1-5 is arbitrary, it is characterised in that specifically walk
Suddenly it is:
(1) first, add water in kieselguhr and humus and obtain mixture slurry so that it is moisture content is 20%-24%, extrudes subsequently
Make the granule of 8mm diameter；
(2) then, granule is mixed homogeneously with discarded fallen leaves, zeolite, chitosan, after piling up 12h, obtain mixture I；
(3) secondly, mixture I carries out microwave treatment, and the temperature of microwave treatment is 55 DEG C-65 DEG C, and the time is 40-50 minute,
To mixtures II；
(4) then, mixtures II and sodium alginate, oxalic acid are carried out steam extraction, process 10 minutes at 78-84 DEG C, pressure
For 2-3MPa；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 lead-contaminated soil renovation agent.
The preparation method of lead-contaminated soil renovation agent the most according to claim 6, it is characterised in that mixing in step (1)
The moisture content of slurry is 22%.
The preparation method of lead-contaminated soil renovation agent the most according to claim 6, it is characterised in that microwave in step (3)
The temperature processed is 60 DEG C, and the time is 45 minutes.
The preparation method of lead-contaminated soil renovation agent the most according to claim 6, it is characterised in that 81 in step (4)
Mixing 10 minutes at DEG C, pressure is 2.5MPa.
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Cited By (5)
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|---|---|---|---|---|
| CN107557016A (en) * | 2017-09-12 | 2018-01-09 | 苏愉 | A kind of lead-contaminated soil curing agent and preparation method thereof |
| CN107652977A (en) * | 2017-09-26 | 2018-02-02 | 上海工程技术大学 | A kind of preparation method of soil conditioner |
| CN108940219A (en) * | 2018-07-12 | 2018-12-07 | 浙江正洁环境科技有限公司 | A kind of anti-acid heavy metal absorbent and preparation method thereof |
| CN112521952A (en) * | 2020-12-07 | 2021-03-19 | 苏州础润环境修复科技有限公司 | Soil passivation microcapsule and method for resource utilization of titanium gypsum |
| CN117106459A (en) * | 2023-10-25 | 2023-11-24 | 四川嘉智生态科技有限公司 | Soil stabilization material suitable for arsenic pollution, and preparation method and application thereof |
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| CN105131970A (en) * | 2015-09-21 | 2015-12-09 | 潍坊友容实业有限公司 | Conditioner for improvement of saline-alkali soil |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557016A (en) * | 2017-09-12 | 2018-01-09 | 苏愉 | A kind of lead-contaminated soil curing agent and preparation method thereof |
| CN107652977A (en) * | 2017-09-26 | 2018-02-02 | 上海工程技术大学 | A kind of preparation method of soil conditioner |
| CN107652977B (en) * | 2017-09-26 | 2019-01-18 | 上海工程技术大学 | A kind of preparation method of soil conditioner |
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| CN108940219A (en) * | 2018-07-12 | 2018-12-07 | 浙江正洁环境科技有限公司 | A kind of anti-acid heavy metal absorbent and preparation method thereof |
| CN112521952A (en) * | 2020-12-07 | 2021-03-19 | 苏州础润环境修复科技有限公司 | Soil passivation microcapsule and method for resource utilization of titanium gypsum |
| CN117106459A (en) * | 2023-10-25 | 2023-11-24 | 四川嘉智生态科技有限公司 | Soil stabilization material suitable for arsenic pollution, and preparation method and application thereof |
| CN117106459B (en) * | 2023-10-25 | 2023-12-22 | 四川嘉智生态科技有限公司 | Soil stabilization material suitable for arsenic pollution, and preparation method and application thereof |
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Application publication date: 20161116 |