SERS detection method for persistent organic pollutants in water body based on microplastics

A technology of organic pollutants and detection methods, applied in the field of SERS detection of persistent organic pollutants in water bodies based on microplastics, can solve the problems of time-consuming and laborious POPs detection

Inactive Publication Date: 2020-06-02
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to improve the time-consuming and labor-intensive shortcomings of POPs detection in traditional water bodies, the present invention uses new pollutant microplastics in the environment as an adsorbent to enrich POPs from environmental water bodies (fresh water, sea water)

Method used

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  • SERS detection method for persistent organic pollutants in water body based on microplastics
  • SERS detection method for persistent organic pollutants in water body based on microplastics
  • SERS detection method for persistent organic pollutants in water body based on microplastics

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Embodiment 1

[0060] Quantitative analysis of fluoranthene content in seawater based on microplastic in-situ extraction technology, SERS technology and chemometric analysis modeling method, qualitative and quantitative analysis of fluoranthene content on the surface of polyethylene (PE) with a particle size of 10-5000 μm , and then deduce the concentration of fluoranthene in seawater, the technical route is as follows figure 1 As shown, the specific steps are as follows:

[0061] (1) Preparation of microplastics pre-adsorbed persistent organic pollutants

[0062] Prepare a fluoranthene seawater solution with a concentration of 1-1000 μg / L, then weigh PE with a particle size of 10-5000 μm according to a volume-to-mass ratio of 1:10 (L:g), add the above-mentioned fluoranthene aqueous solution, and Vibrate at a speed of 130r / min in a constant temperature water bath (10-300μm microplastic shaking time is 1 day, 300-1000μm microplastic shaking time is 40 days, 1000-5000μm microplastic shaking t...

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Abstract

The invention provides an SERS detection method for persistent organic pollutants in a water body based on microplastics. The SERS detection method comprises the following steps: (1) preparing silversol and an AgNPs-(at) SiO2 SERS substrate; (2) according to the particle size of the micro-plastic, respectively carrying out in-situ enhancement and detection on Raman signals of persistent organic pollutants adsorbed on the surface of the micro-plastic by using silver sol and an AgNPs-(at)SiO2 substrate; (3) establishing a prediction model for enriching persistent organic pollutants on the surface of the micro-plastic in combination with a chemometrics method; and (4) determining an optimal fitting model, calculating an equilibrium distribution coefficient / equilibrium adsorption constant ofthe persistent organic pollutants in the water phase and the solid phase, and estimating the concentration of the persistent organic pollutants in the water body. According to the method, micro-plastic is used as a passive sampler, rapid detection of the organic pollutants in the water body is realized, the steps are simple, the consumption of chemical reagents is low, the detection time is short,and a new thought and technical support are provided for rapid detection of the persistent organic pollutants in the water body.

Description

technical field [0001] The invention belongs to the field of environmental health risk assessment, and relates to a microplastic-based SERS detection method for persistent organic pollutants in water bodies, specifically using microplastics as a passive sampler to enrich persistent organic pollutants (POPs) in water bodies ), and then use surface-enhanced Raman spectroscopy (SERS) to conduct in-situ and rapid detection of POPs adsorbed on microplastics and establish a prediction model with mathematical methods. Finally, the equilibrium partition coefficient / equilibrium adsorption of POPs in solid and liquid phases constant to estimate the content of POPs in water. Background technique [0002] Persistent organic pollutants (POPs) are highly toxic to organisms and are ubiquitous in aquatic environments worldwide. Monitoring POPs in water can provide important information for studying the environmental fate of POPs. Trace residue analysis of organic pollutants in oceans and ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/86G01N21/65
CPCG01N21/658G01N30/02G01N30/06G01N30/8679G01N2030/062
Inventor 单佳佳张怡拓王建任涛靳梦轲王雪
Owner DALIAN UNIV OF TECH
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