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Flotation separation method of microplastics in sediment

A separation method and microplastic technology, applied in wet separation, solid separation, plastic recycling, etc., can solve the problems of low recovery rate, low efficiency, cumbersome and time-consuming, and achieve the effect of improving the extraction speed

Active Publication Date: 2020-12-18
南通微淼新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is cumbersome and time-consuming (it takes 5 to 6 days to extract a batch of samples), low efficiency and low recovery rate

Method used

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  • Flotation separation method of microplastics in sediment
  • Flotation separation method of microplastics in sediment
  • Flotation separation method of microplastics in sediment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] like figure 1 Shown, a method for flotation separation of microplastics in sediments, comprising the following steps:

[0045] Step 1, drying and pulverizing the sediment into a powdery sample for later use, wherein the flotation cell and the conical chamber are separately set;

[0046]Step 2, the sample is placed in the holding chamber of the flotation cell, and the upper end surface of the sample is located under the blind hole II; so that the oil outlet is not covered, which is convenient for the microplastics remaining in the water layer to absorb the oil in the later stage;

[0047] Step 3: Fill the flotation tank with water. When the water level in the flotation tank rises to the top of the blind hole II and does not overflow, stop filling the water; fill the flotation tank with water, and at the same time, stir and rinse the flotation with water flow The sample in the tank, so that the microplastics in it are floated to the surface of the water;

[0048] Step 4...

Embodiment 2

[0065] A method for flotation and separation of microplastics in sediments, comprising the following steps:

[0066] Step 1, drying and pulverizing the sediment into 100 grams of powdery samples for later use, wherein the flotation cell and the conical chamber are separately set;

[0067] Step 2, the sample is placed in the holding chamber of the flotation cell, and the upper end surface of the sample is located under the blind hole II; so that the oil outlet is not covered, which is convenient for the microplastics remaining in the water layer to absorb the oil in the later stage;

[0068] Step 3: Fill the flotation tank with water. When the water level in the flotation tank rises to the top of the blind hole II and does not overflow, stop filling the water; fill the flotation tank with water, and at the same time, stir and rinse the flotation with water flow The sample in the tank, so that the microplastics in it are floated to the surface of the water;

[0069] Step 4, ven...

Embodiment 3

[0081] A method for flotation and separation of microplastics in sediments, comprising the following steps:

[0082] Step 1, drying and pulverizing the sediment into 100 grams of powdery samples for later use, wherein the flotation cell and the conical chamber are separately set;

[0083] Step 2, the sample is placed in the holding chamber of the flotation cell, and the upper end surface of the sample is located under the blind hole II; so that the oil outlet is not covered, which is convenient for the microplastics remaining in the water layer to absorb the oil in the later stage;

[0084] Step 3: Fill the flotation tank with water. When the water level in the flotation tank rises to the top of the blind hole II and does not overflow, stop filling the water; fill the flotation tank with water, and at the same time, stir and rinse the flotation with water flow The sample in the tank, so that the microplastics in it are floated to the surface of the water;

[0085]Step 4, vent...

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Abstract

The invention discloses a flotation separation method of micro plastics in sediment. The flotation separation method comprises the following steps: placing a sample in the accommodating cavity of a flotation cell; filling water in the flotation cell, and stopping water filling when the water surface in the flotation cell to ascend above a blind hole II; ventilating the flotation cell, and then standing; filling oil in a conical cavity to enable the oil to overflow , and then, returning the rest oil in the conical cavity to an oil tank; ascending a double-layer leaching component to the conicalcavity arranged on the flotation cell in a sleeving manner; continuing to fill water in the flotation cell until the water in the flotation cell overflows; stopping filling oil in the flotation cellafter certain amount of oil is filled, standing, and then stopping filling water after certain amount of water is filled; filling flushing fluid in the conical cavity until the flushing fluid overflows; and carrying out concentrative volatilization treatment on the flushing fluid mixed with micro plastics collected in an annular collecting tank to obtain extracted micro plastics. With adoption ofthe flotation separation method, micro plastics in the sediment can be effectively extracted, and a micro plastic flotation device is cooperated to effectively increase the extracting speed of the micro plastics.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a method for flotation and separation of microplastics in sediments. Background technique [0002] Microplastic pollution in the environment can be divided into two categories according to the way of production: one is the primary microplastics that directly enter the water body, including plastic microbeads added to personal care products such as toothpaste, scrub facial cleanser, and exfoliating products, and industrial microplastics. Raw material resin particles, industrial additives for shot blasting cleaning materials, polyester fibers produced by washing machines, etc. These artificially produced plastic particles and debris will directly enter the surface water with the waste water washed after use, or due to improper garbage disposal and discarded into groundwater or surface runoff. The other type is formed by the degradation of large-scale plastic waste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B5/40B03B7/00B29B17/02B08B3/02B08B3/08
CPCB03B5/40B03B7/00B08B3/02B08B3/08B29B17/02B29B2017/0244Y02W30/62
Inventor 金文贤
Owner 南通微淼新材料科技有限公司