CN107983766A - A kind of preparation method and application of heavy metal cadmium soil remediation material - Google Patents
A kind of preparation method and application of heavy metal cadmium soil remediation material Download PDFInfo
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- CN107983766A CN107983766A CN201711386544.6A CN201711386544A CN107983766A CN 107983766 A CN107983766 A CN 107983766A CN 201711386544 A CN201711386544 A CN 201711386544A CN 107983766 A CN107983766 A CN 107983766A
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- heavy metal
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- soil remediation
- metal cadmium
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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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of preparation method and application of heavy metal cadmium soil remediation material.The present invention realizes that a kind of preparation method of heavy metal cadmium soil remediation material includes the steps by the following technical solutions：(1) mineral material and complex material are mixed in a certain ratio；(2) mixed material is ground up, sieved.Repair materials prepared by the method for the present invention can be used for the in-situ immobilization of cadmium pollution soil, and technique is simple, cheap, and remediation efficiency is high.Repair materials particle diameter prepared by the method for the present invention is smaller, and specific surface area is big, and is separated out without noxious material, does not produce secondary pollution；The mineral material that the present invention selects is that technical grade is pure, cheap, convenient to promote and apply；Repair time of the invention is short, and restorative procedure is simple, easy to operate, it is only necessary to repair materials, regular plowed soils, the device complicated without other and technique are directly added into contaminated soil, facilitates in actual repair and promotes the use of.
Description
Technical field
The present invention relates to the technical field of soil remediation, more particularly to a kind of system of heavy metal cadmium soil remediation material
Preparation Method and application.
Background technology
Soil is one of Main Natural Resources for the survival of mankind, but China's The Heavy Metal Contaminated Soil phenomenon ten at present
It is point serious, according to statistics, China ploughed be subject to pollutions such as heavy metal cadmium, arsenic, lead, chromium, mercury account for total area under cultivation five/
One；Announced in April, 2014 according to State Ministry of Environmental Protection and Ministry of Land and Resources《National Soil Pollution Investigation publication》, national cadmium
It is 7% to pollute object point position exceeding standard rate, occupies the heavy metal contaminants umber one.Since heavy metal has enriching, high toxicity and difficult drop
Xie Xing, the heavy metal in soil can enter rivers and lakes and underground water by rain drop erosion, be easy to cause the pollution of water body, right
Ecological environment and human health cause great threat, therefore the reparation of heavy metal in soil is extremely urgent.
The current recovery technique in relation to heavy metal cadmium soil has physical restoration, biological restoration and chemical restoration
Deng.Physical restoration includes heavy metal pollution of soil, heat treatment, vitrification, electro reclamation；Biological restoration includes phytoremediation
Method, microorganism remediation method, animal reparation method；Chemical restoration includes elution method and chemical curing method.Wherein chemical curing method because
Its is of low cost, easy to implement, and development is very fast in recent years, is current heavy-metal contaminated soil, is polluted especially for mild or moderate
One important channel of soil remediation.The chemosetting technology of cadmium pollution soil is to be reacted by adding renovation agent with cadmium,
The cadmium of high toxicity, high activity is set finally to be fixed in the form of hypotoxicity, lazy flow in soil.In recent years, clay mineral because
It has derive from a wealth of sources, rich reserves, stable structure, it is cheap, show that adsorption capacity is strong and that ion-exchange capacity is strong etc. is excellent
Point, many scholars, come the heavy metal in fixing soil, but are mostly to study one or more of repair materials therein with clay mineral,
The stability of reparation has much room for improvement, and the price of material is higher, is unfavorable for promoting the use of for repair materials.
To solve the above problems, propose, using mineral material and complex material as formula, to prepare a kind of cadmium pollution soil
Repair materials, are promoted the use of, the heavy metal cadmium in stable soil with the advantage such as remediation efficiency is high and cheap.
Therefore present invention selection heavy metal cadmium is research object, using mineral material and complex material as repair materials, is repaired
The soil of heavy metal cadmium.
The content of the invention
It is an object of the invention to provide a kind of preparation method and application of heavy metal cadmium soil remediation material.
The present invention realizes by the following technical solutions, a kind of preparation method of heavy metal cadmium soil remediation material
Including the steps：
(1) mineral material and complex material are mixed in a certain ratio；
(2) mixed material is ground up, sieved.
Preferably, the mineral material is micron order hydroxyapatite.
Preferably, the complex material includes Anhydrous Disodium Phosphate and quick lime；Both ratios are 0.1~0.5：
1.2~1.8.
Preferably, ball-milling method ground and mixed material is utilized in the step (2), ratio of grinding media to material is 30~50 in ball-milling method, is turned
Speed is 360~550r/min, and processing time is 1.5~2.5h, and resulting materials particle diameter is 0.1~0.05um.
Preferably, the mass ratio of the mineral material and complex material is 1~1.5：0.75~1.
Present invention also offers the application of above-mentioned soil remediation material, include the following steps：By above-mentioned soil remediation material
Put into soil, be uniformly mixed.
Repair materials prepared by the method for the present invention can be used for the in-situ immobilization of cadmium pollution soil, and technique is simple, cheap,
Remediation efficiency is high.Repair materials particle diameter prepared by the method for the present invention is smaller, and specific surface area is big, and is separated out without noxious material, does not produce
Raw secondary pollution；The mineral material that the present invention selects is that technical grade is pure, cheap, convenient to promote and apply；The present invention repairs
Time is short, and restorative procedure is simple, easy to operate, it is only necessary to repair materials, regular plowed soils are directly added into contaminated soil
, the device complicated without other and technique facilitate in actual repair and promote the use of.
Brief description of the drawings
Fig. 1 is that material absorption property compares in embodiment 1
Fig. 2 is to the repairing effect of cadmium pollution soil after different materials add 1,3,5 day in the present embodiment；
To the repairing effect of cadmium pollution soil after 1,3,5 day when Fig. 3 is repair materials dosage difference in the present embodiment.
Embodiment
Technical scheme is described in detail below by specific embodiment, but the scope of the present invention
It is not restricted by the embodiments.
Preparation for trying soil
Plant area's cadmium pollution place is left from Guangdong to fetch earth, and after air-drying, is ground up, sieved, is managed substantially according to soil in national standard
Change the assay method of property, it is 31.10mg/kg to measure the total cadmium content of contaminated soil, soil moisture content 12.33%, and pH value is
4.38, and press《HJ/T 299-2007 solid waste Leaching leaching method sulfonitric methods》Cadmium is dense in obtained leachate
Spend for 1.3083mg/L.
The preparation method of repair materials
It is 1 in mass ratio by micron order hydroxyapatite and complex material：0.75 mixing；The complex material is by anhydrous
Disodium hydrogen phosphate and quick lime composition, Anhydrous Disodium Phosphate：Lime Quality ratio is 0.1:1.2~1.8；Mixed reparation
Material through ratio of grinding media to material be 30, rotating speed 450r/min, processing time be 2.5h ball-milling technologies under the conditions of, obtain the powdery of 0.05um
Material.
Mineral material absorption property compares
(1) nitric acid cadmium solution is prepared, the cadmium concentration of nitric acid cadmium solution is detected with flame atomic absorption spectrometry, after testing cadmium
Concentration is 3.93mg/L；
(2) weigh respectively mineral material bentonite, artificial zeolite, kaolin, concave convex rod, soil remediation material 0.10g,
0.25g, 0.50g, 0.75g, 1.00g are added in 100ml centrifuge tubes, and 50ml nitric acid cadmium solutions are added into 100ml centrifuge tubes, will
100ml centrifuge tubes are put into convertible oscillator, and reversal rate is 30 ± 2r/min, room temperature, record the time, 6 it is small when after stop shake
Swing；
Prepare liquid is centrifuged, takes supernatant, crosses 0.22 micrometer Millipore filter membrane, it is stored refrigerated, finally use Flame Atomic Absorption Spectrometry
Spectroscopic methodology detection, calculates adsorption rate.Fig. 1 is the comparison of different minerals material adsorption rate in this example.
Different materials add 1,3,5 day after to the repairing effect of cadmium pollution soil
1) weighed again than 4% by dry ground respectively each 0.80g of soil remediation material, complex material, bentonite add 100ml from
In heart pipe, the cadmium pollution place soil 20.00g of 24 mesh sieves was added into 100ml centrifuge tubes respectively, 100ml centrifuge tubes were put
Enter convertible oscillator, reversal rate is 30 ± 2r/min, and room temperature, records the time, takes out and is examined when reacting 1,3,5 day respectively
Survey.
2) soil after reparation is pressed《HJ/T 299-2007 solid waste Leaching leaching method sulfonitric methods》Cadmium
The measure of concentration, calculates repair rate.
3) soil after reparation is pressed《The measure of NY/T 1377-2007 soil pHs》Detect pH value.
Fig. 2 is to the repairing effect of cadmium pollution soil after different materials add 1,3,5 day in the present embodiment.
The repair materials of different dosages add 1,3,5 day after to the repairing effect of cadmium pollution soil
1) weighed again than 2%, 4%, 8% by dry ground respectively cadmium repair materials, complex material, bentonite it is each 0.40g,
0.80g, 1.60g are added in 100ml centrifuge tubes, add the cadmium pollution place soil of 24 mesh sieves into 100ml centrifuge tubes respectively
20.00g, is put into convertible oscillator, reversal rate is 30 ± 2r/min, and room temperature, records the time, respectively by 100ml centrifuge tubes
Take out and be detected when reacting 1,3,5 day.
2) soil after reparation is pressed《HJ/T 299-2007 solid waste Leaching leaching method sulfonitric methods》Into
The measure of row cadmium concentration, calculates repair rate.
3) soil after reparation is pressed《The measure of NY/T 1377-2007 soil pHs》Detect pH value.
Fig. 3 be in the present embodiment different dosage repair materials after 1,3,5 day to the repairing effect of cadmium pollution soil.
Embodiment above is only the preferred embodiments of the invention, it should be pointed out that, come for ordinary skill people
Say, what is carried out under the premise of not departing from the present invention is partially improved, among protection scope of the present invention.
Claims (5)
1. a kind of preparation method of heavy metal cadmium soil remediation material includes the steps：
(1) mineral material and complex material are mixed in a certain ratio；
(2) mixed material is ground up, sieved.
Preferably, the mineral material is micron order hydroxyapatite.
2. the preparation method of heavy metal cadmium soil remediation material according to claim 1, it is characterised in that：Described in institute
Complex material include Anhydrous Disodium Phosphate and quick lime；Both ratios are 0.1~0.5：1.2~1.8.
3. the preparation method of heavy metal cadmium soil remediation material according to claim 2, it is characterised in that：The step
(2) ball-milling method ground and mixed material is utilized in, ratio of grinding media to material is 30~50 in ball-milling method, and rotating speed is 360~550r/min, during processing
Between be 1.5~2.5h, resulting materials particle diameter is 0.1~0.05um.
4. the preparation method of heavy metal cadmium soil remediation material according to claim 3, it is characterised in that：The mineral
The mass ratio of material and complex material is 1~1.5：0.75~1.
5. heavy metal cadmium prepared by a kind of preparation method of any heavy metal cadmium soil remediation materials of claim 1-4
The application of contaminated soil remediation material, it is characterised in that：Above-mentioned soil remediation material is put into soil, is uniformly mixed.
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| CN201711386544.6A CN107983766A (en) | 2017-12-20 | 2017-12-20 | A kind of preparation method and application of heavy metal cadmium soil remediation material |
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| CN201711386544.6A CN107983766A (en) | 2017-12-20 | 2017-12-20 | A kind of preparation method and application of heavy metal cadmium soil remediation material |
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Cited By (2)
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| CN108356071A (en) * | 2018-05-07 | 2018-08-03 | 华南师范大学 | A kind of copper polluted soil repair materials and the preparation method and application thereof |
| CN108620433A (en) * | 2018-05-07 | 2018-10-09 | 华南师范大学 | A kind of nickel contamination soil remediation material and the preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108356071A (en) * | 2018-05-07 | 2018-08-03 | 华南师范大学 | A kind of copper polluted soil repair materials and the preparation method and application thereof |
| CN108620433A (en) * | 2018-05-07 | 2018-10-09 | 华南师范大学 | A kind of nickel contamination soil remediation material and the preparation method and application thereof |
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Application publication date: 20180504 |