Method for magnetic component extraction in soil and strong/weak magnetic component separation in extract

A weak magnetic and extractive technology, applied in the field of soil pollution monitoring, can solve the problems of easy error, complicated operation, long test cycle, etc., and achieve the effect of simple steps and strong operability

Active Publication Date: 2009-05-13
JIANGSU YINONG FERTILIZER GROUP
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Problems solved by technology

[0003] In terms of technical research methods, traditional laboratory chemical analysis methods are complex in operation, long test cycle, harsh test conditions, expensive test costs, and prone to errors. These shortcomings limit the further application of laboratory chemical analysis.

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  • Method for magnetic component extraction in soil and strong/weak magnetic component separation in extract

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Embodiment 1

[0021] a. Pretreatment of the soil samples to be extracted: Air-dry the collected soil samples at room temperature, grind them with a ceramic mortar, and pass through a 10-mesh sieve to remove debris such as whetstones, cuttings and plant roots in the soil samples. Take by weighing 50g the soil sample that crosses 10 mesh sieves and place in beaker-1, add 0.5mol / L sodium hexametaphosphate ((NaPO 3 ) 6 ) 20ml, continue to add distilled water to 250ml, stir evenly with a glass rod, soak for about 12h.

[0022] b. Extraction of the full amount of magnetic components: Wrap the strong magnetic magnet with plastic wrap and place it in beaker-1, stir the mixed soil sample with a glass rod, shake the magnet to make it absorb the magnetic particles in the soil sample, and stick to the surface of the magnet when it is absorbed After a layer of magnetic particles, take out the magnet, and wash the magnetic components into the beaker-2 with distilled water; repeat the above operation in ...

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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 [0001] The invention relates to a method for extracting magnetic components in soil and separating strong and weak magnetic components, and belongs to the technical field of soil pollution monitoring. Background technique [0002] Soil is one of the main natural resources that human beings rely on for survival, and it is also an important part of the ecological environment. With the development of industry, urban expansion and the increase of types and quantities of agricultural chemicals, soil pollution has become one of the important global environmental problems. Once the soil environment is polluted, its governance and recovery are much more difficult than the atmosphere and water bodies. Soil pollution not only degrades soil fertility, reduces the yield and quality of agricultural products, but also promotes the deterioration of water environment. In particular, heavy metals in soil have become an important factor of soil pollution due to their charact...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/34
Inventor 许良峰胡雪峰魏骥姜伟曹旭张果吴小红
Owner JIANGSU YINONG FERTILIZER GROUP
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