Experimental device for sampling microplastics on critical surface of water body and atmosphere

Abstract

The utility model discloses an experimental device for sampling micro-plastics on a critical surface of a water body and the atmosphere. The experimental device comprises an obstacle blocking net, a traction hook, a flow guide floating plate, a micro-plastic collecting box and a flow meter, during working, the flow guide floating plate has floating and flow guide effects on the device in a water body, obstacles are cleared away by the barrier net when water flow enters the device through traction of the traction hook, then the water flow flows into the micro-plastic collection box under limitation of the flow guide floating plate, the flow meter measures the flow velocity of the water flow, the filter net filters the inflow water flow, and micro-plastic collection is achieved. The utility model provides a novel water body and atmosphere critical surface micro-plastic sampling device, which makes up the vacancy of a water body and atmosphere critical surface micro-plastic sampling experimental device, provides an efficient, pollution-free and reliable sampling device, and plays a role in all-weather monitoring of water quality and atmosphere quality.

Description

Technical Field

[0001] The utility model relates to the field of experimental devices, in particular to an experimental device for actively sampling microplastics at the critical surface between water and atmosphere. Background Art

[0002] Human activities have caused microplastics to be widely present in the atmosphere, water bodies, and land. Microplastics that have been broken down into small particles have a serious impact on the environment and undermine ecological security. The sampling and analysis of microplastics has always been a hot topic in this field. According to previous studies, the transportation of microplastics is a highly complex cycle process, and there is also an exchange of microplastics between the atmosphere and water bodies. In order to further study the process and flux of microplastic circulation between the atmosphere and water bodies, sampling microplastics on the surface of water bodies is an indispensable task. However, existing microplastic sampling devices, such as the microplastic sampling equipment and sampling method and microplastic mass flux monitoring method disclosed in the invention patent with Chinese patent publication number CN118329532A, are not suitable for sampling at the critical surface of water bodies due to reasons such as buoyancy structure. Utility Model Content

[0003] Purpose of the utility model: The utility model aims to provide an experimental device for sampling microplastics at the critical interface between water and atmosphere to achieve real-time, efficient and accurate sampling.

[0004] Technical solution: The utility model includes a microplastic collection box, which is equipped with at least one filter screen for collecting microplastics, as well as a barrier net and a guide float for blocking obstacles. The microplastic collection box has a water inlet on the front side and a water outlet on the back side. A guide float is hinged on the upper and lower sides of the water inlet, and the front ends of the guide floats on both sides are connected to the barrier net.

[0005] Furthermore, a traction hook is provided on the front side of the guide float, and the traction hook can be made of stainless steel.

[0006] Furthermore, a flow meter is provided at the water inlet on the front side of the microplastic collection box.

[0007] Furthermore, air chambers are provided on the left and right sides of the microplastic collection box.

[0008] Furthermore, the upper and lower sides of the microplastic collection box are made of stainless steel plates, and the air chambers on the left and right sides are stainless steel hollow structures, which provide buoyancy for the collection box.

[0009] Furthermore, the barrier net is fixed to both ends of the guide float by means of pins on both sides.

[0010] Furthermore, the barrier net is made of aluminum and has a mesh size of 1 cm.

[0011] Furthermore, the guide float is connected to the microplastic collection box via a hinge, and the collection box has a plurality of filter clips for fixing the filter.

[0012] Furthermore, the guide float is an aluminum hollow cuboid, which provides buoyancy for the device.

[0013] Furthermore, the flow meter is a water digital flow meter.

[0014] Furthermore, the fiber material used can select a nylon filter with a mesh size of 400 or less according to needs, which can collect microplastic particles larger than 40 microns, and multiple filters with different pore sizes can also be added as needed.

[0015] Beneficial effects: (1) The utility model fills the gap in the experimental device for sampling microplastics on the surface of water bodies, provides an efficient, pollution-free and reliable sampling device, and plays an effect of all-weather monitoring of water quality and atmospheric microplastic sedimentation; (2) The utility model can snap on multiple filter screens with different apertures according to needs to meet multiple sampling needs; (3) The utility model adopts multiple aluminum hollow structures to ensure buoyancy at the critical surface of water body atmosphere and is not easy to rust, and can perform sampling work stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a top view of the overall structure of the utility model. DETAILED DESCRIPTION

[0018] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0019] As shown in the figure, the experimental device for sampling microplastics on the water surface includes an obstacle barrier net 1, a towing hook 2, a guide float 3, a microplastic collection box 4, and a flow meter 5. The obstacle barrier net 1 is fixed to the ends of the guide float 3 by pins on both sides. It can be made of aluminum alloy and the size can be selected according to sampling needs. The mesh size can be 1 cm. The towing hook 2 can be made of stainless steel and is fixed to the top of the guide float for connection to a boat or other device. The guide float 3 is a hollow rectangular parallelepiped made of aluminum, with preferred dimensions of 100 cm long, 30 cm high, and 5 cm wide. It is hinged to the microplastic collection box 4. The microplastic collection box 4 can be made of stainless steel. The microplastic collection box 4 has a water inlet on the front side and a water outlet on the back side. A guide float 3 is hinged on the upper and lower sides of the water inlet. There are hollow air chambers 44 on both sides of the collection box to provide buoyancy. A water flow digital flow meter 5 is set at the water inlet. Multiple filter clips are set inside the collection box, and filters 43 of different specifications can be selected for installation as needed.

[0020] Before use, the filter screen 43 and the obstacle barrier net 1 can be installed according to the sampling needs. For open waters, sampling can be carried out by towing a boat. For narrow rivers, ropes can be fixed to both ends of the river for sampling. During sampling, the guide float 3 of the device plays a floating and diverting role in the water body. The whole is towed by the towing hook 2. When the water flows into the device, the obstacles are cleared by the barrier net 1, and then it flows into the microplastic collection box 4 under the restriction of the guide plate 3. The flow meter 5 measures the water flow velocity, and the filter screen 4 filters the incoming water to collect microplastics. After the sampling is completed, the filter screen is removed for sample processing.

Claims

1. An experimental device for sampling microplastics at the interface between water and atmosphere, comprising a microplastic collection box (4), wherein at least one filter (43) for collecting microplastics is provided in the microplastic collection box (4), characterized in that: It also includes a barrier net (1) and a guide float (3) for blocking obstacles. The microplastic collection box (4) has a water inlet on the front side and a water outlet on the rear side. A guide float (3) is hingedly connected to the upper and lower sides of the water inlet, and the front ends of the guide floats (3) on both sides are connected to the barrier net (1).

2. The experimental device for sampling microplastics at the interface between water and atmosphere according to claim 1, characterized in that: A traction hook (2) is provided on the front side of the guide float (3).

3. The experimental device for sampling microplastics at the interface between water and atmosphere according to claim 1, characterized in that: A flow meter (5) is provided at the water inlet on the front side of the microplastic collection box (4).

4. The experimental device for sampling microplastics at the interface between water and atmosphere according to claim 1, characterized in that: Air chambers (44) are provided on the left and right sides of the microplastic collection box (4).

5. The experimental device for sampling microplastics at the interface between water and atmosphere according to claim 4, characterized in that: The upper and lower sides of the microplastic collection box (4) are stainless steel plates, and the air chambers (44) on the left and right sides are stainless steel hollow structures, providing buoyancy for the collection box (4).

6. The experimental device for sampling microplastics at the interface between water and atmosphere according to claim 1, characterized in that: The barrier net (1) is fixed to both ends of the guide floating plate (3) via latches on both sides.

7. The experimental device for sampling microplastics at the interface between water and atmosphere according to claim 1, characterized in that: The barrier net (1) is made of aluminum and has a mesh size of 1 cm.

8. The experimental device for sampling microplastics at the interface between water and atmosphere according to claim 1, characterized in that: The guide float (3) is connected to the microplastic collection box (4) via a hinge (41), and the collection box (4) is built with a plurality of filter screen buckles (42) for fixing the filter screen (43).

9. The experimental device for sampling microplastics at the interface between water and atmosphere according to claim 1, characterized in that: The guide float (3) is an aluminum hollow cuboid and provides buoyancy for the device.

10. The experimental device for sampling microplastics at the interface between water and atmosphere according to claim 3, characterized in that: The flow meter (5) is a water flow digital flow meter.

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