Separation equipment and method for micro-plastic in plateau lake sediments

Abstract

The invention discloses separation equipment and method for micro-plastic in plateau lake sediments. The separation equipment comprises a separation cylinder, wherein the top surface of the separation cylinder is open, an end cover is detachably connected to the top surface of the separation cylinder, a stirring device is arranged on the end cover, a vent hole and a feeding hole are formed in the top surface of the end cover, and a centrifugal device is arranged in the end cover; the centrifugal device comprises a rotating mechanism, the rotating mechanism is arranged at the bottom of an inner cavity of the separation cylinder, a centrifugal plate is fixedly connected to the top surface of the rotating mechanism, a first sealing bearing is arranged between the peripheral wall of the centrifugal plate and the inner wall of the separation cylinder, a liquid storage cavity is formed between the bottom surface of the centrifugal plate and the bottom of the inner wall of the separation cylinder, a centrifugal cylinder is fixedly connected to the center of the top surface of the centrifugal plate, a plurality of liquid outlet holes are formed in the top of the centrifugal cylinder at equal intervals in the circumferential direction, a plurality of filtering mechanisms are sequentially arranged outside the centrifugal cylinder in a sleeving mode, the inner cavity of the centrifugal cylinder is divided into a plurality of filtering cavities by the filtering mechanisms, a plurality of liquid discharging holes are formed in the centrifugal plate, and the filtering cavities communicate with the liquid storage cavity through the liquid discharging holes; and a plurality of water discharging mechanisms are arranged on the bottom surface of the centrifugal plate at equal intervals in the circumferential direction.

Description

technical field [0001] The invention relates to the technical field of separation of microplastics, in particular to a separation device and method for microplastics in plateau lake sediments. Background technique [0002] Microplastics are a new type of environmental pollutants, which refer to plastic particles and textile fibers with a particle size of less than 5mm. Microplastics are small and easy to be ingested by aquatic organisms, and may also become carriers of other pollutants. In recent years, microplastic pollution has received widespread attention around the world. Microplastics are divided into two categories: primary microplastics and secondary microplastics. Primary microplastics refer to industrial products of plastic particles discharged into the water environment through rivers, sewage treatment plants, etc., such as microplastic particles contained in cosmetics or used as Plastic granules and resin granules of industrial raw materials, secondary microplas...

AI Technical Summary

Problems solved by technology

With the expansion of the field of human activities and the continuous increase of material demand, the intensity of human intervention and utilization of plateau lakes is also increasing, resulting in a large accumulation of microplastics in plateau lake sediments. Because microplastics are difficult to degrade and often pass through The secondary effect will produce unpredictable potential hazards, so it is urgent to separate the microplastics in the sediment to prevent the microplastics from causing greater pollution to the environment. The current separation method is mainly the flotation method in the laboratory, but for There are few reports on the separation equipment and methods of microplastics in plateau lake sediments, and the current methods cannot classify and separate microplastics by size, which is not convenient for subsequent in-depth research. At the same time, the flotation method requires the use of corresponding saturated solutions. ,higher cost

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