Sampling and identifying method for micro-plastics in dust in workplace and application thereof

Abstract

The invention discloses a sampling and identifying method for micro-plastic in dust in a workplace and application thereof. Micro-nano plastic exposure risk investigation of an injection molding post is performed in a plastic production and processing enterprise, according to the application characteristics of different micro-nano plastic detection technologies, a mass spectrometry method and an infrared spectrometry method are selected to identify and analyze plastic raw materials involved in the operation process so as to define the characteristics of the to-be-detected micro-nano plastic target substance related to the operation. On the basis, a fixed-point sampling method is adopted to carry out workshop atmosphere sampling at the injection molding operation post. Then, the filter membrane is put under a light microscope to preliminarily observe the morphology and size of the dust, and the chemical components of the dust is identified by adopting an infrared spectroscopy method. In combination with field sampling and laboratory characterization data, the potential occupational exposure risk of the micro-nano plastic aerosol in the workplace is revealed.

Description

technical field [0001] The invention relates to the technical field of dust detection in workplaces, in particular to a method for sampling and identifying microplastics in dust in workplaces. Background technique [0002] From 1950 to 2015, the total global plastic output reached 8.3 billion metric tons, the usage was about 2.5 billion metric tons, and the recycling volume was 600 million metric tons. The output value of my country's plastic products has been increasing year by year, accounting for about 24.8% of the global output value. The main components are low-density polyethylene (23.1%), polypropylene (22.6%), high-density polyethylene (17.4%), and polypropylene. Ethylene terephthalate (14.2%) and polystyrene (7.1%). Plastics become microplastics (diameter<5mm) through degradation and abrasion, and evolve into nanoplastics (diameter<1000nm) under heating (30°C) and light. Micro-nanoplastics can be widely distributed in the air in the form of aerosols. Entering...

AI Technical Summary

Problems solved by technology

However, the characteristics of exposure to micro-nanoplastics in the air environment related to work have not been fully elucidated: ①The traceability of occupational exposure risk is unclear, and the detection of the job post and its materials is insufficient, so it is impossible to analyze the exposure position of micro-nanoplastic exposure risk; ②The identification of chemical components is not yet available. Sufficient, it is difficult to identify the presence or absence of micro-nanoplastics and their types; ③Concentration and size measurements are aimed at total suspended particulates, and the morphology, size and pollution degree of micro-nanoplastics cannot be clarified

Images