Separation device and separation method for separating micro-plastic and cellulose crystals in soil

Abstract

The invention discloses a separation device and a separation method for separating micro-plastic and cellulose crystals in soil. The separation device comprises a sample preparation system, a gradingand separating system, a grading and collecting system and a circulating system, wherein the sample preparation system is used for preparing soil turbid liquid; the grading and separating system is used for enabling the soil turbid liquid to flow into the grading and separating system through a pipeline, and grading and separating are carried out in a hierarchical separation system; the grading and collecting system is used for independently collecting and temporarily storing the components contained in various soil separated by grading; and the circulating system is used for recovering the solution of the grading and separating system and the grading and collecting system, and conveying the solution to a sample preparation system for cyclic utilization. According to the separation deviceand the separation method for separating the micro-plastic and the cellulose in the soil are separated from each other, grading and layered separation can be carried out on the components in the soil,and the accuracy and effectiveness of soil research are improved; and the sample preparation solution can be recycled, the experiment raw materials are saved, and the soil separation efficiency is improved.

Description

technical field [0001] The invention relates to a soil component separation device and a separation method, in particular to a separation device and a separation method for separating microplastics and cellulose crystals in soil. Background technique [0002] When plastic is discarded into the soil, it will be broken into smaller microplastics under physical effects such as sunlight radiation, biological erosion, wind and water erosion. Microplastics have the characteristics of refractory, small particle size, and strong hydrophobicity. They are ideal carriers of hydrophobic pollutants and heavy metals such as PCBs, pesticides, and polycyclic aromatic hydrocarbons. They can also migrate and diffuse through water flow, resulting in large areas of soil heavily polluted. [0003] In order to study and control soil pollution, it is necessary to separate and analyze soil components. Existing soil separation devices usually use the flotation method to dilute the soil sample into...

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Problems solved by technology

[0004] However, the existing soil separation devices and separation methods usually require a long period of static treatment of the sample solution to fully separate the soil components, and cannot achieve continuous and uninterrupted separation of the sample solution circulation.

In addition to microplastics, there may also be other components such as crystalline cellulose in the soil. In order to make the research results more accurate and effective, each component should be separated for research. However, due to the small size of microplastics and crystalline cellulose, It is seriously mixed with sediment, so the existing separation device cannot achieve the effect of fractionating and separating the multi-components in the soil

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