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System and method for sampling microplastics in seawater

A technology of microplastics and seawater, applied in the field of marine environment monitoring, can solve problems such as contamination, inability to collect samples and export, and inconvenient analysis, and achieve the effect of large sampling volume

Pending Publication Date: 2018-03-27
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the filter used in the trawl sampling method is mostly plastic net, it is easy to cause contamination, the accuracy of the sampled water sample volume cannot be guaranteed, and fixed-point sampling cannot be completed. After sampling, the collected samples cannot be completely exported, which is inconvenient for analysis.

Method used

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  • System and method for sampling microplastics in seawater
  • System and method for sampling microplastics in seawater
  • System and method for sampling microplastics in seawater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The seawater microplastic sampling device includes a flow meter and a filter connected to the flow meter, the filter is provided with a water inlet 1, a water outlet 2 and an ultrasonic vibrator 5, the filter water inlet 1 is connected to the flow meter, the filter housing 3 and A detachable filter screen 4 is provided between the ultrasonic vibrators 5, the channel between the housing 3 and the filter screen 4 is connected to the water inlet 1, the channel between the filter screen 4 and the ultrasonic vibrator 5 leads to the water outlet 2, and the housing 3 The bottom is provided with valve 6.

Embodiment 2

[0025] On the basis of Embodiment 1, the filter water outlet 2 is connected to the backwash liquid container and the filtered water sample container. A one-way valve and a booster pump are arranged between the filter and the backwash liquid container. A third water valve is arranged between the filter and the filtered water sample container.

Embodiment 3

[0027] On the basis of embodiment 2, the filter includes a first filter and a second filter, the first filter and the second filter have the same structure, and a second water valve and a pressure gauge are arranged between them. A first water valve is arranged between the flow meter and the filter. It also includes a water pump through which the liquid to be sampled is introduced into the sampling system. The filter screen is seawater corrosion-resistant stainless steel, and the filter housing is transparent quartz glass.

[0028] Take the collection of microplastic samples of 0.3mm-5mm in 1 cubic meter of seawater as an example. If the sampling location is remote, the abundance of microplastics in seawater is low, and it is not suitable for trawl sampling. It needs to collect a large number of water samples to complete Riddle. By using the device, on-site sampling can be completed conveniently and quickly. The main collection steps are as follows:

[0029] (1) The first ...

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Abstract

The invention belongs to the technical field of microplastic sampling, and discloses a system and a method for sampling microplastics in seawater. The system comprises a flowmeter and a filter connected with the flowmeter, wherein the filter is provided with a water inlet, a water outlet and an ultrasonic vibrator; the water inlet of the filter is connected with the flowmeter; a detachable filterscreen is arranged between a filter shell and the ultrasonic vibrator; a channel between the shell and the filter screen is connected with the water inlet; a channel between the filter screen and theultrasonic vibrator leads to the water outlet; a valve is arranged on the bottom part of the shell. According to the technical scheme, the microplastics in a water body can be acquired on site, and the microplastics in a large sample water body are quantitatively enriched so as to be analyzed and detected by a laboratory. The system and the method are large in sampling quantity, high-efficient, accurate, simple, convenient and flexible.

Description

technical field [0001] The invention relates to a seawater microplastic sampling device and method, belonging to the field of marine environment monitoring, in particular to a microplastic sampling system and method in seawater. Background technique [0002] Microplastics (Microplastics) are new types of environmental pollutants that have received widespread attention in recent years. At present, there is no uniform international standard for the definition of microplastics. It generally refers to plastic fragments or plastic particles with a particle size of less than 5 mm. Microplastics have relatively stable properties, small particle size, low density, large specific surface area, and strong hydrophobicity. They can exist in the environment for a long time and can migrate with external forces. They are ideal carriers for many hydrophobic organic pollutants and heavy metals. When microplastics are accidentally eaten by plankton and fish, they can stay in organisms for a l...

Claims

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Application Information

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IPC IPC(8): G01N1/14G01N1/34
CPCG01N1/14G01N1/34
Inventor 孔祥峰高楠褚东志王茜吕红敏张述伟张婧吴丙伟吕婧张颖颖曹煊刘岩
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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