CN101430260A - Method for magnetic component extraction in soil and strong/weak magnetic component separation in extract - Google Patents
Method for magnetic component extraction in soil and strong/weak magnetic component separation in extract Download PDFInfo
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- CN101430260A CN101430260A CNA2008102039602A CN200810203960A CN101430260A CN 101430260 A CN101430260 A CN 101430260A CN A2008102039602 A CNA2008102039602 A CN A2008102039602A CN 200810203960 A CN200810203960 A CN 200810203960A CN 101430260 A CN101430260 A CN 101430260A
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Abstract
The invention provides a method for picking up magnetic component in soil and separating strong magnetic component form weak magnetic component and belongs to the technical field of soil pollution monitoring. In the method, soil sample is air-dried, ground and filtered for removing sundries firstly; then certain quantity of the soil sample is added with distilled water and dispersant for preliminary treatment; after the preliminary treatment, total magnetic component is picked up from the soil sample by strong magnet; then the weak magnetic component is separated by weak magnet; and the strong magnetic component and the weak magnetic component are centrifugated and dried respectively. The invention has high purity of the picked-up and separated magnetic component, simple and fast steps, strong operability and no damage to sample form.
Description
Technical field
The present invention relates to a kind of method that magnetic component extraction and strong, weak magnetic component in the soil are separated, belong to the soil pollution monitoring technical field.
Background technology
Soil is one of the mankind's main natural resources of depending on for existence, also is the important component part of ecologic environment.Along with the increase of industrial development, urban sprawl and agrochemicals kind, quantity, soil pollution has become one of global important environmental problem.In a single day soil environment is polluted, and its improvement and recovery are more much more difficult than atmosphere and water body.Soil pollution not only makes soil fertility degeneration, reduces the output and the quality of agricultural product, and impels water environment degradation.Particularly the heavy metal in the soil because it has characteristics such as polyphyly, disguise, hysteresis quality, cumulative bad, irreversibility, becomes the important factor of soil pollution.Heavy metal can also be absorbed by the crop enrichment, and finally jeopardizes human life and health by food chain.Therefore, heavy metal pollution situation in the investigation soil environment to improving the environmental quality of soil, promotes the sustainable development of agricultural, ensures that health is all significant.
On the technical method of research, traditional laboratory chemical analysis means are owing to complicated operation, and test period is long, the test condition harshness, and the testing expense costliness easily produces error, and these shortcomings have all limited the chemico-analytic further application in laboratory.Heavy metal in the soil all has strong magnetics feature, though only account for the composition of trace, is the controlling elements of soil magnetism.Because the magnetics parameter testing is fast, easy, and does not destroy sample, so soil magnetism has become a focus of heavy metal-polluted soil research.And the extraction of magnetics component is the prerequisite of soil magnetism research with separating in the soil.
Summary of the invention
The object of the present invention is to provide strong and weak magnetic component extraction and the method for separating in a kind of soil.
For achieving the above object, the present invention adopts following technical scheme:
A kind of method that magnetic component in the soil is extracted and strong, the weak magnetic component in the extract is separated.Concrete steps are as follows:
A. the pre-treatment of soil sample to be extracted: with the soil sample of gathering natural air drying at room temperature, grind, cross 10 mesh sieves, remove the foreign material such as gravel, landwaste and root system of plant in the soil sample with ceramic mortar; Take by weighing the soil sample that 50g crosses 10 mesh sieves and place beaker-1, add 0.5mol/L sodium hexametaphosphate ((NaPO
3)
6) 10～40ml, adding distil water stirs with glass bar to 250ml, soaks 8～16h;
B. the extraction of full dose magnetic component: ferromagnetism magnet is placed in the beaker-1 with the preservative film parcel, stir mixed soil sample with glass bar, the rolling moving magnet makes the magnetic-particle in its absorption soil sample, after magnet surface to be drawn to adheres to one deck magnetic-particle, magnet is taken out, magnetic component is washed in the beaker-2 with distilled water; Aforesaid operations for several times no longer includes magnetic-particle to magnet surface and adheres among the repeating step b, promptly is considered as in the soil sample magnetic component and extracts and finish;
C. the separation of strong and weak magnetic component: weak magnetic magnet is placed in the beaker-2 with the preservative film parcel, mictomagnetism particle with glass bar agitation step b extraction, the rolling moving magnet makes the ferromagnetism component in its absorption mictomagnetism particle, after magnet surface to be drawn to adheres to one deck ferromagnetism particle, magnet is taken out, the ferromagnetism component is washed in the beaker-3 with distilled water; Aforesaid operations no longer includes the ferromagnetism particle to magnet surface and adheres to for several times among the repeating step c, promptly is considered as strong and weak magnetic component separation and finishes;
D. Separation of Solid and Liquid: respectively the magnetic component in beaker-2, the beaker-3 is washed centrifuge tube-1 with distilled water, in the centrifuge tube-2, behind centrifugal 10～20 minutes of 2000～4000 commentaries on classics/min, remove supernatant liquor, then put into 40～70 ℃ of oven for drying to constant weight, can obtain ferromagnetism component and weak magnetic component in the soil sample respectively.
Compared with prior art, extracting method of the present invention has following marked improvement:
A: pedotheque adds water and stirs evenly, and can improve extraction efficiency;
B: pedotheque adds the dispensed in small quantity agent, can disperse the soil micelle, makes that extraction is more complete;
C: select for use sodium hexametaphosphate as spreading agent, its chemical property gentleness can breaking sample;
D: adopt strong and weak magnet to extract at twice respectively, promptly improved extraction efficiency, strong and weak magnetic component can be separated again, kill two birds with one stone;
E: with Separation of Solid and Liquid, improve the magnetic component drying efficiency greatly with high speed centrifugation.
The present invention with the dual extraction method of strong and weak magnetic extract with separate soil in strong and weak magnetic component, step is comparatively easy, quick, workable, does not destroy sample.
Description of drawings
Fig. 1 is that strong and weak magnetic component is extracted and the process flow diagram that separates in the soil
Embodiment
After now embodiments of the invention specifically being described in.
Embodiment 1
A. the pre-treatment of soil sample to be extracted: with the soil sample of gathering natural air drying at room temperature, grind, cross 10 mesh sieves, remove the burr in the soil sample, foreign material such as landwaste and root system of plant with ceramic mortar.Take by weighing the soil sample that 50g crosses 10 mesh sieves and place beaker-1, add 0.5mol/L sodium hexametaphosphate ((NaPO
3)
6) 20ml, continue adding distil water to 250ml, stir with glass bar, soak about 12h.
B. the extraction of full dose magnetic component: ferromagnetism magnet is placed on beaker-1 with the preservative film parcel, stir mixed soil sample with glass bar, the rolling moving magnet makes the magnetic-particle in its absorption soil sample, after magnet surface to be drawn to adheres to one deck magnetic-particle, magnet is taken out, magnetic component is washed in the beaker-2 with distilled water; Aforesaid operations for several times no longer includes magnetic-particle to magnet surface and adheres among the repeating step b, promptly is considered as in the soil sample magnetic component and extracts and finish.
C. the separation of strong and weak magnetic component: weak magnetic magnet is placed in the beaker-2 with the preservative film parcel, mictomagnetism particle with glass bar agitation step b extraction, the rolling moving magnet makes the ferromagnetism component in its absorption mictomagnetism particle, after magnet surface to be drawn to adheres to one deck ferromagnetism particle, magnet is taken out, the ferromagnetism component is washed in the beaker-3 with distilled water; Aforesaid operations no longer includes the ferromagnetism particle to magnet surface and adheres to for several times among the repeating step c, promptly is considered as strong and weak magnetic component separation and finishes.
D. Separation of Solid and Liquid: respectively with beaker-2, magnetic component in the beaker-3 washes centrifuge tube-1 with distilled water, in the centrifuge tube-2, behind centrifugal 15 minutes of the 3000 commentaries on classics/min, remove supernatant liquor, then put into 50 ℃ of oven for drying to constant weight, can obtain ferromagnetism component and weak magnetic component in the soil sample respectively.
Claims (1)
1. method of magnetic component in the soil being extracted and strong, the weak magnetic component in the extract being separated, concrete steps are as follows:
A. the pre-treatment of soil sample to be extracted: with the soil sample of gathering natural air drying at room temperature, grind, cross 10 mesh sieves, remove the foreign material such as gravel, landwaste and root system of plant in the soil sample with ceramic mortar; Take by weighing the soil sample that 50g crosses 10 mesh sieves and place beaker-1, add 0.5mol/L sodium hexametaphosphate ((NaPO
3)
6) 10～40ml, adding distil water stirs with glass bar to 250ml, soaks 8～16h;
B. the extraction of full dose magnetic component: ferromagnetism magnet is placed in the beaker-1 with the preservative film parcel, stir mixed soil sample with glass bar, the rolling moving magnet makes the magnetic-particle in its absorption soil sample, after magnet surface to be drawn to adheres to one deck magnetic-particle, magnet is taken out, magnetic component is washed in the beaker-2 with distilled water; Aforesaid operations no longer includes magnetic-particle to magnet surface and adheres to for several times among the repeating step b;
C. the separation of strong and weak magnetic component: weak magnetic magnet is placed in the beaker-2 with the preservative film parcel, mictomagnetism particle with glass bar agitation step b extraction, the rolling moving magnet makes the ferromagnetism component in its absorption mictomagnetism particle, after magnet surface to be drawn to adheres to one deck ferromagnetism particle, magnet is taken out, the ferromagnetism component is washed in the beaker-3 with distilled water; Aforesaid operations no longer includes the ferromagnetism particle to magnet surface and adheres to for several times among the repeating step c;
D. Separation of Solid and Liquid: respectively the magnetic component in beaker-2, the beaker-3 is washed centrifuge tube-1 with distilled water, in the centrifuge tube-2, behind centrifugal 10～20 minutes of 2000～4000 commentaries on classics/min, remove supernatant liquor, then put into 40～70 ℃ of oven for drying to constant weight, can obtain ferromagnetism component and weak magnetic component in the soil sample respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102039602A CN101430260B (en) | 2008-12-04 | 2008-12-04 | Method for magnetic component extraction in soil and strong/weak magnetic component separation in extract |
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| CN2008102039602A CN101430260B (en) | 2008-12-04 | 2008-12-04 | Method for magnetic component extraction in soil and strong/weak magnetic component separation in extract |
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| CN101430260A true CN101430260A (en) | 2009-05-13 |
| CN101430260B CN101430260B (en) | 2011-06-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199818A (en) * | 2010-10-14 | 2013-07-10 | 富士康(昆山)电脑接插件有限公司 | Filter circuit and electric connector with filter circuit |
| CN104043642A (en) * | 2014-06-25 | 2014-09-17 | 柏连阳 | Method for in-situ separation of harmful heavy metal in soil |
| US9421589B2 (en) | 2010-07-15 | 2016-08-23 | Dowa Eco-System Co., Ltd. | Soil cleaning method |
| TWI554339B (en) * | 2010-07-19 | 2016-10-21 | Dowa Eco System Co Ltd | Soil purification method |
| CN115235856A (en) * | 2022-09-22 | 2022-10-25 | 宁德厦钨新能源材料有限公司 | Method for testing cleanliness of magnetic particles extracted by high magnetic force |
-
2008
- 2008-12-04 CN CN2008102039602A patent/CN101430260B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9421589B2 (en) | 2010-07-15 | 2016-08-23 | Dowa Eco-System Co., Ltd. | Soil cleaning method |
| TWI554339B (en) * | 2010-07-19 | 2016-10-21 | Dowa Eco System Co Ltd | Soil purification method |
| CN103199818A (en) * | 2010-10-14 | 2013-07-10 | 富士康(昆山)电脑接插件有限公司 | Filter circuit and electric connector with filter circuit |
| CN104043642A (en) * | 2014-06-25 | 2014-09-17 | 柏连阳 | Method for in-situ separation of harmful heavy metal in soil |
| CN115235856A (en) * | 2022-09-22 | 2022-10-25 | 宁德厦钨新能源材料有限公司 | Method for testing cleanliness of magnetic particles extracted by high magnetic force |
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| Publication number | Publication date |
|---|---|
| CN101430260B (en) | 2011-06-08 |
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Owner name: JIANGSU YINONG FERTILIZER GROUP CO., LTD. Free format text: FORMER OWNER: SHANGHAI UNIVERSITY Effective date: 20140516 |
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Effective date of registration: 20140516 Address after: 226600, Jiangsu, Nantong province Haian County town of National Day Patentee after: Jiangsu Yinong Fertilizer Group Co., Ltd. Address before: 200444 Baoshan District Road, Shanghai, No. 99 Patentee before: Shanghai University |