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Sampling device and method for collecting micro-nano plastic in water body based on electro-adsorption technology

A medium-micro-nano, sampling device technology, applied in the sampling device and other directions, can solve the problems of missing water nanoplastics, time-consuming and laborious transportation, and easy blockage of filter membranes, to overcome the excessive sampling volume, easy to carry and transport, and to overcome the inconvenience of transportation. Effect

Pending Publication Date: 2021-11-30
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the sampling of microplastics in water mainly includes large-volume sampling and concentrated volume sampling. The large-volume sampling operation is time-consuming, laborious and inconvenient to transport; the concentrated volume sampling is too small and the filter membrane is easy to clog. Small nanoplastics, thereby affecting the quantitative analysis results of micro-nanoplastics in environmental media
[0003] The existing inventions mainly improve the sampling efficiency by optimizing the aperture of the filter screen and adopting the sampling method of hierarchical filtration, but none of them can completely solve the above problems
The invention proposes a sampling device and method for collecting micro-nano plastics in water bodies based on electro-adsorption technology, which can effectively avoid the problems of screen blockage and too small sampling volume, and is simple and easy to implement

Method used

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  • Sampling device and method for collecting micro-nano plastic in water body based on electro-adsorption technology
  • Sampling device and method for collecting micro-nano plastic in water body based on electro-adsorption technology
  • Sampling device and method for collecting micro-nano plastic in water body based on electro-adsorption technology

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Embodiment 1

[0025] Such as figure 1 , 2 , 3, and 4, a sampling device based on electro-adsorption technology for collecting micro-nano plastics in water bodies includes solar panels, photovoltaic power generation systems, DC regulated power supplies, foam floating plates, cylindrical electrodes, metal rods, and fixing devices. First connect the solar panel 1 to the photovoltaic power generation system 2, the solar panel generates electric energy and stores the electric energy in the photovoltaic power generation system, and the photovoltaic power generation system is connected to the DC regulated power supply 3 and supplies power for it. Put the two big rings 73 through the small holes 63 on the shorter end of the metal rod 4, adjust the distance between the two big rings according to the size of the graphite paper, and fix them with the big ring matching screws 71. Wrap the graphite paper coated with the electrode solution on the large ring, clamp the junction with a clip, and the side ...

Embodiment 2

[0027] The method of collecting microplastics by using the sampling device for collecting micro-nanoplastics in the water body in the above-mentioned embodiment 1 is as follows: fix the sampling device according to the position and depth of the sampling point, keep the side wall of the cylindrical electrode parallel to the direction of water flow, and connect the direct current with a wire. The stabilized power supply and the longer end of the metal rod are used to set the voltage with a DC stabilized power supply. After the sampling is completed, the sampling device is retracted, and the graphite paper is removed and sealed for storage for the next test.

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Abstract

The invention provides a sampling device and method for collecting micro-nano plastic in a water body based on an electro-adsorption technology. The sampling device is composed of seven parts, namely a solar cell panel, a photovoltaic power generation system, a direct-current stabilized power supply, a foam floating plate, a cylindrical electrode, a metal rod and a fixing device. During sampling, the electrode position is adjusted according to the depth of a sampling point, so that the cylinder side is parallel to the water flow direction, and a voltage is applied for sampling. Compared with the prior art, the device can realize in-situ sampling of micro-plastics in a water body, and solves the problems of screen mesh blockage or inconvenience in transportation due to overlarge sample volume in the traditional sampling technology.

Description

technical field [0001] The invention belongs to the technical field of micro-plastic sampling, and in particular relates to an in-situ sampling device and method required for quantitative detection of micro-nano plastic pollution levels in water bodies. Background technique [0002] Human activities have discharged a large amount of plastic waste into the water environment, and these plastic waste will be decomposed into micro-nano plastics with smaller particle sizes under the effects of hydraulic shearing, photodegradation, and biodegradation. Because of its large specific surface area, micro-nano plastics are easy to absorb organic pollutants such as polychlorinated biphenyls and bisphenol A in the environment. After being accidentally eaten by fish, they will cause great harm to the human body through the food chain. At present, the sampling of microplastics in water mainly includes large-volume sampling and concentrated volume sampling. The large-volume sampling operati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/10
CPCG01N1/10
Inventor 汪磊薛一宁杨金涛卢会霞
Owner NANKAI UNIV