A net for sampling microplastics in surface water

Abstract

The invention discloses a net for sampling microplastics in a surface water body and a matching sample bottle. The net includes a net, and the net is surrounded by a filter cartridge that can leak water but can retain microplastics. The filter cartridge The front end of the water inlet is a water inlet, most of which are submerged below the water surface, and a small part floats above the water surface. The sample bottle can leak water but can retain microplastics, and is movably connected with the filter cartridge, and the microplastics retained by the filter cartridge can automatically enter the sample bottle. Compared with the existing technology, the net of the present invention has the function of self-suspension, the net mouth is perpendicular to the water surface, automatically maintains the water level, and does not need to artificially control the height of the net mouth floating on the water surface, and can be used to accurately calculate the stock of microplastics in a unit of water.

Description

technical field [0001] The invention relates to the field of marine environment protection, in particular to a net suitable for sampling microplastics in surface water bodies and a matching sample bottle. Background technique [0002] Plastic waste is mostly stable long-chain polymers, which are not easy to degrade in the natural environment, but can be broken into tiny plastic particles under the action of light, tide, temperature difference or wind erosion, and become microplastic waste. Microplastics refer to plastic fibers, particles or films with a size smaller than 5 mm. Microplastics in the water environment have the characteristics of huge quantity, fast growth rate, enrichment and release of toxic and harmful substances, and can endanger human health along the food chain, which has attracted widespread attention. Research on microplastics in water bodies in my country is still in the initial stage of exploration, and only sporadic surveys and samplings have been ca...

AI Technical Summary

Problems solved by technology

At present, large-scale continuous sampling of surface water microplastics mostly uses plankton nets, and the plankton nets are designed as submersible nets with round openings, small diameters, and small water inflows. The survey ship will be torn if the speed is slightly higher. ; and it is not easy to control the water layer when sampling microplastics in the surface water body, and the water intake at the network port has a large deviation, which makes it difficult to ensure the accuracy of sampling

At present, there is a lack of a special net suitable for large-area continuous and accurate sampling of microplastics in surface water

Images