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Full-size extraction and detection method for micro-plastics in sediment in deep sea cold spring area

A detection method and technology for microplastics, applied in plastic recycling, chemical instruments and methods, and analytical materials, etc., can solve the problems of unguaranteed recognition accuracy and inapplicable microplastics identification, etc., to reduce interference, reduce consumption, shorten The effect of the experimental procedure

Active Publication Date: 2022-06-03
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above scheme can realize the detection of microplastics in ordinary water environment sediments, it is not suitable for the identification of microplastics in the extreme environment of the deep sea, and its identification accuracy cannot be guaranteed

Method used

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  • Full-size extraction and detection method for micro-plastics in sediment in deep sea cold spring area
  • Full-size extraction and detection method for micro-plastics in sediment in deep sea cold spring area
  • Full-size extraction and detection method for micro-plastics in sediment in deep sea cold spring area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] like figure 1 As shown in the figure, a full-scale extraction and detection method of microplastics in sediments of deep-sea cold springs includes the following steps:

[0060] S1: Obtain sediments from deep-sea cold springs;

[0061] S2: Preprocess the sediments in the deep-sea cold spring area to obtain a full-scale purified microplastic solution;

[0062] S3: perform hierarchical vacuum filtration on the obtained full-size purified microplastic solution to obtain a purification filter membrane rich in microplastics with different advantages;

[0063] S4: Scan the purification filter with a fluorescence microscope, record the particle number, shape and color of all microplastics on the purification filter, and collect the microplastics larger than 500um in the field of view for labeling detection, and obtain the sediments in the deep-sea cold spring area. Results of polymer types in microplastics larger than 500um and virtual imaging features of some large-sized mic...

Embodiment 2

[0069] More specifically, due to the following shortcomings in the current detection methods of microplastics in common water environment sediments:

[0070] ①Glass fiber membrane is used as the main suction filtration membrane, but the surface of the glass fiber membrane is rough, so it is not suitable for the treatment of microplastics directly by reflection, and the glass fiber membrane is easy to have fibers falling off during the experiment, especially in the After sonication and shaking, the translucent fibers became a major source of interference for instrumental analysis.

[0071] ②The method of first digestion and then emergence has the disadvantage of consuming a large amount of digestion solution. Digestion of the pretreated sediments not only digests the soil tissue in the sediments, but also the bacterial micelles, humic acid and other biological characteristics of the sediments, which are mixed with a large number of unnecessary digestion substances. Adding too ...

Embodiment 3

[0123] In order to further illustrate the implementation process and effect of this solution, this embodiment specifically provides the best embodiment, and the specific process is as follows image 3 shown.

[0124] The instruments and equipment used in this embodiment are as follows:

[0125] Stainless steel cutter, 2L beaker, graphite heating plate, 250mL beaker, glass rod, 1L volumetric flask, vacuum filtration device, 400 mesh iron sieve, freeze dryer, electronic balance, magnetic stirrer, 2mL glass vial, ultrasonic cleaner, ceramic Tweezers, spoons.

[0126] The reagents and consumables used in this example are as follows:

[0127] Zinc chloride, 95% ethanol, 30% hydrogen peroxide solution are all commercially available, 2800 mesh stainless steel filter membrane, 25mm diameter, 0.45um pore size hydrophilic glossy silver film, sealing film, tin foil paper.

[0128] This embodiment provides a full-scale extraction-combined analysis solution for microplastics in the sedi...

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Abstract

The invention provides a full-size extraction and detection method for micro-plastics in deep sea cold spring area sediments, which comprises the following steps: acquiring the deep sea cold spring area sediments and pretreating the deep sea cold spring area sediments to obtain a full-size purified micro-plastic solution and obtain a purified filter membrane rich in micro-plastics with different advantages; scanning the purification filter membrane by using a fluorescence microscope to realize extraction and detection of micro-plastics greater than 500 microns in the sediment in the deep sea cold spring area; and extracting and purifying the purification filter membrane to obtain a large-size micro-plastic extraction and purification solution with the size of more than 5 microns and a sub-size micro-plastic extraction and purification solution with the size of 0.45-5 microns from the sediments in the deep sea cold spring region, so as to extract and detect the micro-plastic with the size of more than 5 microns and the micro-plastic with the size of 0.45-5 microns. According to the full-size extraction and detection method for the micro-plastic in the sediment in the deep sea cold spring area, basic research of the micro-plastic in an extreme environment is completed, and full-size extraction and detection of the micro-plastic in the sediment in the deep sea cold spring area are achieved.

Description

technical field [0001] The invention relates to the technical field of extraction and detection of deep-sea extreme environmental pollutants, in particular to a full-scale extraction and detection method of microplastics in sediments in deep-sea cold spring areas. Background technique [0002] Microplastics are plastics with a diameter of less than 5mm, in which shapes include fibers, particles, fragments, foams, etc., and are widely present in the earth system. About 80% of microplastics in the ocean come from land and marine activities in coastal areas, and plastics in inland areas can also enter the marine environment through river transport and other means. After microplastics enter the marine environment, their morphological characteristics change significantly during the process of migration and transformation. For example, from floating on the surface of seawater, to suspending in seawater, and finally entering deep-sea sediments, the shape and size of microplastics v...

Claims

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Application Information

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IPC IPC(8): G01N21/64G01N23/2251G01N21/3577G01N21/65B01D61/00
CPCG01N21/6458G01N23/2251G01N21/3577G01N21/65B01D61/00Y02W30/62
Inventor 冯景春黎灿荣吴晓楠张偲杨志峰
Owner GUANGDONG UNIV OF TECH
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