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CN-121678991-B - Soil microplastic detection method, device, equipment and medium

CN121678991BCN 121678991 BCN121678991 BCN 121678991BCN-121678991-B

Abstract

The invention discloses a soil micro-plastic detection method, a device, equipment and a medium, which comprise the steps of obtaining a plurality of soil samples in a target area, determining soil parameters of the soil samples, dividing the target area according to the soil parameters to obtain a first area and a second area, preprocessing the soil samples in the first area to obtain micro-plastic samples, analyzing the micro-plastic samples to obtain micro-plastic parameters corresponding to the micro-plastic samples, determining migration risks according to the micro-plastic parameters, and determining detection interval periods of the soil micro-plastic in the target area according to the migration risks and the area of the first area. The invention belongs to the field of micro plastic detection. The invention can accurately determine the detection period of the micro plastic.

Inventors

  • YOU RUI
  • XIA HAN
  • XIE ZHAOJUN
  • LONG LING
  • DENG YIJIE
  • LI JING
  • QIN FENG
  • WEI XIAOQIANG
  • FANG CHUNYAN
  • DENG YING
  • TANG ZHENYONG
  • ZHOU YA
  • LI XIA
  • LUO LIHUI
  • WANG PENG

Assignees

  • 四川省农业科学院农业质量标准与检测技术研究所

Dates

Publication Date
20260508
Application Date
20260206

Claims (7)

  1. 1. The soil micro-plastic detection method is characterized by comprising the following steps of: acquiring a plurality of soil samples in a target area, and determining soil parameters of the soil samples, wherein the soil parameters comprise soil particle size and pore size; Dividing the target area according to the soil parameters to obtain a first area and a second area, wherein the first area is a peripheral area of the second area; pretreating a soil sample in a first area to obtain a micro-plastic sample; analyzing the micro plastic sample to obtain micro plastic parameters corresponding to the micro plastic sample, wherein the micro plastic parameters comprise micro plastic particle size and micro plastic abundance; determining migration risk according to the micro-plastic parameters; Determining a detection interval period of the soil micro-plastic in the target area according to the migration risk and the area of the first area; determining migration risk according to the micro-plastic parameters, including: , Wherein, the In order to migrate the risk of migration, For the abundance of the microplastic after dimensionless treatment, Is a reference particle size of the micro plastic, Is made of micro-plastic with the particle size, As a result of the empirical coefficient, ; Determining a detection interval period of the soil micro plastic of the target area according to the migration risk and the area of the first area, wherein the detection interval period comprises the following steps: , Wherein, the In order to detect the period of the interval, For a standard period of time, In order to adjust the coefficient of the power supply, , For the risk of standard migration, For the area of the first region, As a result of the historical experience coefficient, Is the area of the target area; dividing the target area according to the soil parameters to obtain a first area and a second area, wherein the method comprises the following steps: , Wherein, the For the width of the first region, In order to set the standard width of the device, And Are all the weights of the preset weight, and the weight of the whole body is equal to the preset weight, Is the particle size of the standard soil, The particle size of the soil is that of the soil sample, As the pore size of the soil sample, Is the standard pore size; and expanding the width of the first region inwards by taking the boundary of the target region as the boundary to obtain the first region, and taking the part of the target region except the first region as a second region.
  2. 2. The method of claim 1, wherein the step of pre-treating the soil sample in the first region to obtain a micro plastic sample comprises: Naturally drying the soil sample in the first area, and performing primary screening on the soil sample in the first area; removing organic matters from the soil sample in the first area based on a hydrogen peroxide oxidation method; Inorganic mineral removal is performed on the soil sample in the first area based on an acid digestion method; and (3) carrying out microplastic enrichment on the soil sample in the first area based on a density flotation method to obtain a microplastic sample in the first area.
  3. 3. The method for detecting soil microplastic according to claim 2, wherein analyzing the microplastic sample to obtain the microplastic parameters corresponding to the microplastic sample comprises: Filtering the enriched micro plastic sample to a filter membrane; determining the particle number of the microplastic based on a stereoscopic microscope, and determining the abundance of the microplastic according to the particle number of the microplastic and the weight of the soil sample in the first area; the particle size of each microplastic was determined based on ImageJ or NIS-Elements, and the median particle size of each microplastic was taken as the microplastic particle size in the microplastic parameters.
  4. 4. The method of claim 1, wherein obtaining a plurality of soil samples in the target area and determining soil parameters of the soil samples comprises: setting a plurality of sampling points in the target area based on a grid method, and collecting soil samples at the sampling points; Calculating the particle size of each particle in the soil sample based on a sedimentation method, and taking the median of the particle sizes of each particle as the soil particle size; based on X-ray micro-CT, the pore size of the soil sample is determined.
  5. 5. A soil micro-plastic detection device, characterized in that it is applied to a soil micro-plastic detection method as claimed in any one of claims 1 to 4, comprising: the acquisition module is used for acquiring a plurality of soil samples in the target area and determining soil parameters of the soil samples, wherein the soil parameters comprise soil particle size and pore size; The dividing module is used for dividing the target area according to the soil parameters to obtain a first area and a second area, wherein the first area is a peripheral area of the second area; The micro-plastic processing module is used for preprocessing the soil sample in the first area to obtain a micro-plastic sample; The analysis module is used for analyzing the micro-plastic sample to obtain micro-plastic parameters corresponding to the micro-plastic sample, wherein the micro-plastic parameters comprise micro-plastic particle size and micro-plastic abundance; The risk module is used for determining migration risk according to the micro-plastic parameters; And the period determining module is used for determining the detection interval period of the soil micro-plastic in the target area according to the migration risk and the area of the first area.
  6. 6. An electronic device, comprising: A processor; a memory for storing the processor-executable instructions; Wherein the processor is configured to execute to implement a soil microplastic detection method as claimed in any one of claims 1 to 4.
  7. 7. A non-transitory computer readable storage medium, characterized in that instructions in the non-transitory computer readable storage medium, when executed by a processor of an electronic device, enable the electronic device to perform a soil microplastic detection method implementing any one of claims 1 to 4.

Description

Soil microplastic detection method, device, equipment and medium Technical Field The invention relates to the field of micro-plastic detection, in particular to a method, a device, equipment and a medium for detecting soil micro-plastic. Background As microplastic contamination increases, its occurrence and migration risk in the soil environment raise a broad concern. The traditional detection method uniformly samples a plurality of target areas, ignores heterogeneity of soil physical structure and heterogeneity of pollutant spatial distribution, and causes low monitoring efficiency and risk early warning lag. The detection process of the microplastic is tedious, the detection frequency is too high, a large amount of manpower and material resources are wasted, and the soil condition cannot be detected in time due to low detection frequency. The related patent document CN202410501202.8 also provides a means for adjusting the frequency, but it only performs a comparative adjustment according to the soil microplastic migration syndrome value, and how to adjust specifically, the comparative document does not provide a specific adjustment means. Therefore, an intelligent detection method is needed to improve the accuracy of monitoring the soil microplastic. Disclosure of Invention The invention solves the technical problem of unreasonable detection period of the microplastic in the prior art by providing the method, the device, the equipment and the medium for detecting the soil microplastic, and achieves the technical effect of improving the rationality of the detection period of the microplastic. In a first aspect, the invention provides a soil micro-plastic detection method, comprising the following steps: acquiring a plurality of soil samples in a target area, and determining soil parameters of the soil samples, wherein the soil parameters comprise soil particle size and pore size; Dividing a target area according to soil parameters to obtain a first area and a second area, wherein the first area is a peripheral area of the second area; pretreating a soil sample in a first area to obtain a micro-plastic sample; analyzing the micro plastic sample to obtain micro plastic parameters corresponding to the micro plastic sample, wherein the micro plastic parameters comprise micro plastic particle size and micro plastic abundance; Determining migration risk according to the micro-plastic parameters; and determining the detection interval period of the soil micro plastic in the target area according to the migration risk and the area of the first area. Further, determining migration risk according to the microplastic parameters includes: , Wherein, the In order to migrate the risk of migration,For the abundance of the microplastic after dimensionless treatment,Is a reference particle size of the micro plastic,Is made of micro-plastic with the particle size,As a result of the empirical coefficient,。 Further, determining a detection interval period of the soil micro plastic of the target area according to the migration risk and the area of the first area, including: , Wherein, the In order to detect the period of the interval,For a standard period of time,In order to adjust the coefficient of the power supply,,For the risk of standard migration,For the area of the first region,As a result of the historical experience coefficient,Is the area of the target area. Further, dividing the target area according to soil parameters to obtain a first area and a second area, including: , Wherein, the For the width of the first region,In order to set the standard width of the device,AndAre all the weights of the preset weight, and the weight of the whole body is equal to the preset weight,Is the particle size of the standard soil,The particle size of the soil is that of the soil sample,As the pore size of the soil sample,Is the standard pore size; and expanding the width of the first region inwards by taking the boundary of the target region as the boundary to obtain the first region, and taking the part of the target region except the first region as a second region. Further, the soil sample in the first area is pretreated to obtain a micro plastic sample, which comprises the following steps: Naturally drying the soil sample in the first area, and performing primary screening on the soil sample in the first area; removing organic matters from the soil sample in the first area based on a hydrogen peroxide oxidation method; Inorganic mineral removal is performed on the soil sample in the first area based on an acid digestion method; and (3) carrying out microplastic enrichment on the soil sample in the first area based on a density flotation method to obtain a microplastic sample in the first area. Further, analyzing the micro plastic sample to obtain micro plastic parameters corresponding to the micro plastic sample, including: Filtering the enriched micro plastic sample to a filter membrane; determining the particle number of t