Microplastic floatation grading separation device in wetland deposits and method thereof

Abstract

The invention discloses a microplastic floatation grading separation device in wetland deposits and a method thereof. The separation method comprises the following steps of charging a filter liquid sodium chloride solution into a first container; putting deposit samples into a second container; putting a rotor in the second container; sucking the sodium chloride solution in the first container into a second container through a siphon; stirring deposits and filter liquid in the second container by a magnetic power stirrer; performing still standing after the stirring; sucking supernatant liquidand suspended matters to a sieve screen filtering system through a pump; filtering micro plastics by a filter unit; recovering the filtered sodium chloride solution into the recovery container; washing away salt bases in the filtering unit; flushing the micro plastics of filtering screens stage by stage in the filtering unit into different containers; after the still standing, performing suctionfiltering on the microplastics by a vacuum pump onto a filter film with square lattices; removing moisture by drying the filtering film. The micro plastics can be accurately and effectively separatedfrom the deposit wet land so as to accurately analyze the pollution condition of the deposit micro plastics.

Description

technical field [0001] The invention relates to a microplastic fractionation and separation device and a separation method thereof, in particular to a microplastic flotation fractionation separation device in wetland sediments and a method thereof. Background technique [0002] Plastics are widely used due to their light weight, durability, and cheapness, but low recycling rates and improper disposal of plastic waste lead to the accumulation of plastics in the environment. It is gradually broken down into fragments until it reaches the millimeter or even micron level and remains in the ecological environment. Microplastics refer to plastic particles with a diameter of less than 5 mm. Studies have found that they are widely distributed in environmental media such as seawater, rivers, lakes, and sediments, and are even found in polar regions. Due to the small particle size of microplastics, many marine organisms, including protozoa, zooplankton, fish, turtles, birds, etc., ea...

AI Technical Summary

Problems solved by technology

Due to the accumulation of silt in the wetland area, the sediment particles are relatively fine, and a large number of plant residues are mixed in it. The traditional primary flotation method cannot meet its requirements. A large number of fine particles and plant residues cannot be separated by filtration. In the identification of microplastics Unable to accurately judge during the process, which leads to the inability to carry out the research

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