A device for detecting and identifying microplastics based on dielectric loss tangent

Abstract

The invention relates to a micro-plastic detecting and identifying device based on dielectric loss angle tangent value. The device comprises an input power supply, wherein an output end of the input power supply is connected with one end of a sample circuit and one end of a standard circuit, and a feeder is arranged above the sample circuit; the other end of the sample circuit and the other end ofthe standard circuit are both connected to an input end of a data acquisition and storage module and are grounded; an output end of the data acquisition and storage module is connected with a data processing module; the data acquisition and storage module is used for detecting voltage and current values on the sample circuit and the standard circuit, transmitting the data to the data processing module and storing the data; the data processing module performs signal conversion on received data and processes the data to obtain the dielectric loss tangent value of detected micro-plastic, and identification and detection of the micro-plastic are achieved. The device can reduce uncertainty of existing methods, ensure accuracy of identification results and can be widely applied to the technicalfields of environmental monitoring and identification and detection of the micro-plastics in environmental media.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring and identification and detection of microplastics in environmental media, in particular to a device for detecting and identifying microplastics based on a dielectric loss tangent value. Background technique [0002] Since the invention of plastic materials, due to its good performance, it has been widely used by people. However, discarded plastic products will accumulate in the environment for a long time, and will be broken into small plastic fragments by physical and chemical effects, and can be transported over long distances. The marine environment is broken into smaller fragments by physical effects such as solar radiation, biological erosion, tidal and wave erosion. At present, people define these plastic material fibers, particles and fragments with sizes ranging from 1nm to 5mm as microplastics. Microplastics are widely distributed in the marine environment and are more ...

AI Technical Summary

Problems solved by technology

[0008] It can be seen from the table that the dielectric constant of different plastics is not very different, but the dielectric loss tangent of different plastics is quite different, and some even differ by an order of magnitude.

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