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Device and method for collecting microplastics in surface water

The technology of a collection device and collection method, which is applied in the field of microplastic collection devices, can solve the problems of not being able to collect surface water samples of water bodies well

Active Publication Date: 2019-06-18
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microplastics are mainly concentrated in the most surface water body. Usually, the deeper the concentration, the smaller the concentration. However, the current general-purpose water sample collectors use location and depth as parameters and cannot collect surface water samples well (microplastic-enriched areas )

Method used

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  • Device and method for collecting microplastics in surface water
  • Device and method for collecting microplastics in surface water
  • Device and method for collecting microplastics in surface water

Examples

Experimental program
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specific Embodiment 1

[0019] A device for collecting microplastics in surface water, such as figure 1 As shown, it includes an upper wooden frame 1 and a lower wooden frame 2 with the same frame surface shape and size. The wooden frame 1 is surrounded by four crossbars 4, at least one pair of symmetrical crossbars 4 is provided with a counterweight groove 5 for placing counterweights in the center, the sum of the gravity of the microplastic collection device and the weight of the counterweights Just equal to the buoyancy produced by the lower wooden frame 2 in the liquid, the aperture of the steel wire mesh 3 is 1-2mm 2 of quadrilaterals. It is difficult to collect surface water if the mesh is too large, and it is difficult to purge and collect if the mesh is too small, 1-2mm 2 Quadrilaterals (including squares, rectangles and parallelograms, etc.) are more appropriate sizes.

[0020] In this specific embodiment, the upper wooden frame 1 and the lower wooden frame 2 are fixedly connected by stee...

specific Embodiment 2

[0021] The method for collecting microplastics using the microplastic collection device in the surface water in the above specific embodiment 1, the specific steps are as follows Figure 2-Figure 6 As shown, according to the formula M 配 =r1*V 下 * g-M 总 , calculate the weight of the counterweight, place the counterweight in the counterweight tank 5, and then put the microplastic collection device into seawater so that the sum of the gravity of the microplastic collection device and the gravity of the counterweight is just equal to the lower wooden frame 2 generated buoyancy, the steel wire mesh 3 was pasted on the water surface to sample, so that the microplastics in the surface water were subjected to capillarity and rose into the mesh of the steel mesh 3 together with the surface water, and the microplastic collection device was quickly lifted, and then the microplastics were removed by blowing. The collected surface water is blown into the basin, filled into the sampling b...

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Abstract

The invention discloses a device and method for acquiring microplastic in surface layer water. The device is characterized by comprising an upper wood frame and a lower wood frame which are identical in frame surface shape and size, wherein the upper wood frame and the lower wood frame are fixedly connected, a steel wire mesh is arranged between the upper wood frame and the lower wood frame, the upper wood frame is formed by four cross rods, balance weight grooves for placing balance weight objects are formed in the centers of at least one pair of symmetrical cross rods, the sum of the overall gravity of the microplastic acquiring device and the gravities of the balance weight objects is rightly equal to the buoyancy produced by the lower wood frame in liquid, and the steel wire mesh is a quadrangle having the hole diameter of 1-2 mm<2>. The device has the advantage that a surface layer water sample of a water body can be rapidly and effectively acquired.

Description

technical field [0001] The invention relates to a collection device for microplastics, in particular to a collection device for microplastics in surface water and a collection method thereof. Background technique [0002] Microplastics, which are plastic particles with a diameter of less than 5 mm, are a major carrier of pollutants. Microplastics are small in size, which means higher specific surface area (specific surface area refers to the surface area per unit mass of porous solid matter). The larger the specific surface area, the stronger the ability to adsorb pollutants. First of all, there are already a large number of persistent organic pollutants such as PCBs and bisphenol A in the environment (these organic pollutants are often hydrophobic, which means that they are not easily dissolved in water and tend to be adsorbed on hydrophobic surfaces ), once the microplastics and these pollutants meet, they just aggregate to form an organic pollution sphere. Microplastics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/10
CPCG01N1/10
Inventor 于旭彪王侃郑宇豪张力文陈明龙
Owner NINGBO UNIV
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