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Quantitative analysis method for soil microplastics in biological soil crust layer

A biological soil and quantitative analysis technology, applied in the field of environmental engineering, can solve the problems of no quantitative analysis method for microplastics, and achieve the effect of low cost, simple operation and high accuracy

Pending Publication Date: 2021-11-30
NORTHWEST INST OF ECO-ENVIRONMENT & RESOURCES CAS
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Problems solved by technology

However, there are currently no methods for the quantitative analysis of microplastics in biological soil crusts

Method used

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  • Quantitative analysis method for soil microplastics in biological soil crust layer
  • Quantitative analysis method for soil microplastics in biological soil crust layer
  • Quantitative analysis method for soil microplastics in biological soil crust layer

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Embodiment Construction

[0020] A method for quantitative analysis of microplastics in biological soil crust, the steps of which are:

[0021] a. Sample collection and processing -

[0022] After the rain or the ultra-pure water contained in a glass container is used to moisten the biological soil crust layer, the biological soil crust layer is collected with an aluminum or glass ring knife, and the operator must wear cotton rather than chemical fiber clothing;

[0023] After the soil samples were collected, they were dried in a cool and dark place, and then stored at a constant temperature at 4°C in a dark place for later use.

[0024] Weigh 2.5g sample of biological soil crust layer, put it into a 250ml Erlenmeyer flask, add 100ml deionized water and 5ml corn germ oil, manually shake for 1min and then let stand for 30min. If there are large particle aggregates or soil clods in the soil after standing still, use a magnetic stirrer to re-stir for 2-3 minutes until the large particle aggregates or soi...

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Abstract

Biological soil crust is a common complex formed by cementation of tiny organisms and soil particles on the earth surface of an arid and semi-arid region, and the biological soil crust is extremely easy to adsorb organic substances and micro-plastics due to the special physical structure and chemical composition of the biological soil crust. Due to the fact that the organic matter and the micro-plastic have similar properties and structures, the micro-plastic is not prone to being separated from the biological soil crust layer with the concentrated organic matter content in the detection process, and quantitative analysis is not prone to being carried out. The invention relates to a method for extracting soil micro-plastics in a biological soil crust layer according to the proportion of 2 ml corn germ oil / g biological soil crust, gradually diluting an extracting solution according to three stages, namely two times of each stage, and heating by using a high-temperature probe to promote the structure and form of the micro-plastics to change, so the problem that organic matters in the crust layer interfere with quantitative analysis of the microplastics is effectively solved, and the quantitative analysis precision and efficiency of the soil microplastics in the biological soil crust layer are improved. The method is simple to operate, low in cost and high in accuracy.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and specifically relates to a quantitative analysis method for soil microplastics in biological soil crust layers. Background technique [0002] With the rapid development of the plastics industry, plastic products have become an indispensable category of products in daily life. Plastic products can exist in the environment for a long time, and are easily decomposed into small pieces with a particle size of less than 5mm under the action of external forces in the environment. Because of its large specific surface area and refractory characteristics, this kind of microplastic can absorb many pollutants and become the main pollution carrier. Some debris enters the soil and becomes a new type of pollutant, which changes the soil structure and affects the development of soil organisms. Directly and indirectly threaten the stability of ecosystem structure and function. [0003] Bio...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N25/00G01N1/08G01N1/28G01N1/38
CPCG01N21/84G01N25/00G01N1/08G01N1/28G01N1/38
Inventor 贾荣亮贾鸿飞高艳红杨昊天王进张甜赵芸
Owner NORTHWEST INST OF ECO-ENVIRONMENT & RESOURCES CAS
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