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A device and method for extracting micro-plastic in settlings

An extraction device and a technology for microplastics, applied in the field of environmental engineering, can solve the problems of cumbersome and time-consuming extraction, low recovery rate, low efficiency, etc., and achieve the effects of improved elution effect, improved extraction efficiency, and easy removal.

Active Publication Date: 2017-10-24
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The present invention proposes an extraction device and method for extracting microplastics in sediments, the purpose of which is to overcome the cumbersome and time-consuming extraction of microplastics in sediments in the prior art, low efficiency, low recovery rate, low precision, and poor reliability Defects

Method used

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  • A device and method for extracting micro-plastic in settlings
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  • A device and method for extracting micro-plastic in settlings

Examples

Experimental program
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Embodiment 1

[0056] An extraction device for microplastics in sediments, the structure of which includes a filter cartridge 1, a liquid storage tank 2, a motor 3, a base 4, a mesh screen 5, and a transmission shaft 12; wherein the filter cartridge 1 is installed in the liquid storage tank 2, There is a screen 5 at the top of the filter cartridge 1, the liquid storage tank 2 and the motor 3 are installed on the base 4, and the bottom of the liquid storage tank 2 has a discharge hole 8 connected with the filter cartridge 1; the motor 3 is connected to the transmission shaft through the rotating shaft 16 One end of 12 is joined, and the other end of power transmission shaft 12 passes row hole 8 and joins with the bottom of filter cartridge 1.

[0057] The mesh screen 5 is a circular screen, and the mesh screen 5 is movably connected with the upper opening of the filter cartridge 1 and is detachable.

[0058] The filter cartridge 1 is cylindrical, the side wall and the bottom of the filter car...

Embodiment 2

[0074] A method for extracting microplastics in sediments, the specific steps comprising:

[0075] (1) Dispersion: First mix the sediment sample with the dispersant solution (the dispersant solution is an aqueous solution of potassium metaphosphate or sodium metaphosphate with a concentration of 2.0g / L-5.5 g / L), and then pass through the filter cartridge 1 Filter through the 5.0mm pore size mesh screen 5 on the top mouth and enter the filter cartridge 1, then rinse the screen mesh 5 with a dispersant solution until there is no residue with a particle size of less than 5.0mm, then take out the mesh mesh 5, and then let the motor 3 pass through the rotating shaft 16 drives the filter cartridge 1 to run in both directions. At this time, the impeller 7 on the inner bottom of the filter cartridge 1 also moves accordingly to generate water flows in different directions, thereby promoting the dispersion of solid particles in the sample suspension under the action of fluid shear force;...

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Abstract

A device and method for extracting micro-plastic in settlings are provided. The device includes a filter drum, a liquid storage tank, a motor, a pedestal, a screen sieve and a transmission shaft. The filter drum is mounted in the liquid storage tank. The upper port of the filter drum is provided with the screen sieve. The liquid storage tank and the motor are mounted on the pedestal. The bottom of the liquid storage tank is provided with a drainage hole communicated with the filter drum. The motor is connected to one end of the transmission shaft through a rotating shaft, and the other end of the transmission shaft passes through the drainage hole and is connected to the bottom of the filter drum. The device and the method are advantageous in that (1) dispersion effects of muddy settlings and elution effects of a sample are obviously improved; (2) the recovery rate of the sample is increased, (3) the extraction efficiency is greatly increased, (4) extraction time is shortened and (5) labor is saved.

Description

technical field [0001] The invention relates to an extraction device and an extraction method for microplastics in water environment sediments, belonging to the technical field of environmental engineering. Background technique [0002] Plastic products are widely used in industrial production and daily consumption due to their good performance. As of 2015, global plastic production has increased from 311 million tons in 2014 to 322 million tons, and China's production accounts for more than 27% of the global total. Ranking first, the output of discarded plastic waste is also increasing, which affects the ecological security of the water environment. According to the latest research, varying degrees of microplastic pollution have been found in the water and sediments of the Yangtze River, Yangtze River Estuary, Taihu Lake, Tibet lakes, Wuhan urban rivers, and Beijiang River. [0003] Microplastic pollution in the environment can be divided into two categories according to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D36/04
CPCB01D36/045
Inventor 侯俊程芳王超王沛芳刘智临苗令占钱进熬燕辉陈娟
Owner HOHAI UNIV
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