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Soil micro-plastics separating device and separating method

A separation device and technology for microplastics, which are applied in solid separation, preparation of samples for testing, etc., can solve the problems of not considering the surface adsorption of microplastics, tedious and time-consuming extraction of microplastics, and low recovery rate, and shorten the processing time. , save resources, increase the effect of separation effect

Active Publication Date: 2019-06-07
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a device and method for separating microplastics in soil without affecting other pollutants adsorbed on the surface of microplastics in soil, so as to overcome the cumbersome and time-consuming extraction of microplastics in soil in the prior art , low efficiency, low recovery rate, low precision, poor reliability and does not consider the defects of microplastic surface adsorption

Method used

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  • Soil micro-plastics separating device and separating method
  • Soil micro-plastics separating device and separating method
  • Soil micro-plastics separating device and separating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] refer to Figure 1 ~ Figure 3 and Figure 7 , a microplastics separation device in soil, characterized in that it comprises a fixed box 5, a sample collection pool 2 and a vibrator 15, the fixed box 5 is provided with a conveying pipe 6, and the bottom of the conveying pipe 6 is provided with several A circular hole with a diameter of 2 cm is provided with a clip 16 matching the delivery pipe 6 below the circular hole. One end of the delivery pipe 6 passes through the fixed box 5 and is connected with an air pump 9, the air outlet end of the air pump 9 is provided with a gas flowmeter 8, and the other end of the delivery pipe 6 passes through the fixed box 5 and is connected with a filter 7, The fixed box 5 is opened along a side of the length direction of the conveying pipe 6, so as to observe the separation of microplastics in the soil. The filter 7 is trumpet-shaped, and the small-diameter end of the filter 7 is connected to the delivery pipe 6. The large-diameter ...

Embodiment 2

[0044] refer to Figure 4 ~ Figure 6 and Figure 7 , the present embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that: one end of the delivery pipe 6 is connected with an air pump 9, and the other end is connected with a sample collection bottle 11; A section of delivery tube 6 between the tube 23 and the sample collection bottle 11 is in the shape of an upward convex arc. A second support plate 22 is fixedly connected to the outside of the fixed box 5 , and the second support plate 22 is used to support the sample collection bottle 11 . The sample collection bottle 11 is threadedly connected with an air outlet cover 10, and a through hole 19 is arranged in the middle of the sealing portion of the air outlet cover 10, and the conveying pipe 6 passes through the through hole 19 and stretches into the sample collection bottle 11, and the sealing portion of the air outlet cover 10 It includes upper, middle and lower...

Embodiment 3

[0046] A method for separating microplastics in soil, comprising the steps of:

[0047] Step 1: Sampling: Collect soil from microplastic-polluted areas;

[0048] Step 2: Pretreatment: Air-dry the soil sample collected in step 1 after removing impurities to obtain a sample to be treated;

[0049] Step 3: preliminary selection: put the sample obtained in step 2 into the filter funnel 1, the sample falls into the vibrating plate 4 through the 5mm filter sieve on the filter funnel 1, and screen to obtain a soil sample with a particle size less than 5mm, turn on the vibrator 15, The vibrating plate 4 vibrates and drives the soil sample to vibrate. The microplastic particles with a lighter density in the soil sample gradually float on the soil surface with the vibration. Turn on the fan 3 and adjust the wind speed to blow the microplastics on the soil surface into the sample collection pool 2 middle;

[0050] Step 4: Check again: the microplastic particles separated into the sampl...

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Abstract

The invention discloses a soil micro-plastics separating device and separating method. The device comprises a fixing box, a sample collecting pool and a vibrator. A conveyor pipe is arranged in the fixing box. One end of the conveyor pipe passes through the fixing box and is connected with an air pump, and the other end passes through the fixing box and is connected with a filter or a sample collecting bottle. The conveyor pipe is connected with the lower end of the sample collecting pool through a sample inlet pipe. A filter funnel is arranged at the top of the sample collecting tank, and a supporting structure is arranged inside the sample collecting pool. The vibrator is fixed in the sample collecting tank through the supporting structure. A fan is arranged on the upper inner wall of the sample collecting tank. The micro-plastics separating method includes the steps of collecting micro-plastics by a filter membrane on the filter and separating the micro-plastics to the sample collecting bottle. The separation effect is obviously improved. The sample recovery rate is obviously improved. There is no need to add density solution. The content of other pollutants adsorbed on the surface of micro-plastics will not be affected, and the follow-up study on the law of adsorption on the surface of micro-plastics is facilitated. The extraction time is shortened, and manpower and material resources are saved.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and relates to a separation device and method for microplastics in soil. Background technique [0002] The advent of plastic has changed our way of life. Because this material can be used in a large temperature range, has low thermal conductivity, high strength-to-weight ratio, biological inertness, durability and other advantages, it has been widely used all over the world, from From household products to personal hygiene products, from clothing, packaging to building materials, plastic products appear in all aspects of human life. It is precisely because of their widespread use that since they were put into mass production in the 1950s, the world's plastic production has shown The trend of exponential growth has risen from 5 million tons in the 1950s to 322 million tons in 2016. [0003] While enjoying the convenience that plastic products bring to life, people are becoming more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28B07B15/00
Inventor 张成丽张伟平周艳梅任少云钱静马建华
Owner HENAN UNIVERSITY
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