Method for monitoring polycyclic aromatic hydrocarbons (PAHs) in surface seawater by means of remote sensing

Abstract

The invention discloses a method for monitoring polycyclic aromatic hydrocarbons (PAHs) in surface seawater by means of remote sensing. According to the method, the large-area distribution of the remote sensing inversion concentration of the dissolved PAHs in the surface water of estuaries and bays is obtained by establishing a content algorithm model for quantitatively expressing the dissolved PAHs of the ocean by using water color parameters such as chromophoric dissolved organic matter (CDOM) concentration of the estuaries and the bays, and applying the content algorithm model to images of a geostationary ocean color imager (GOCI) of a first geostationary meteorological satellite sensor on the world. After the method is adopted, the contamination status of the PAHs in offshore waters can be monitored by means of remote sensing; the method is mainly used for monitoring the distribution characteristics of marine pollutants in ways of large area and high frequency. The remote sensing-based monitoring model for monitoring the distribution situation of the PAHs in the surface water of estuaries and the bay is proposed based on analysis of measured data and is applied to satellite data of the GOCI, and remote sensing monitoring of the PAHs concentration is realized in virtue of the remote component CDOM in the seawater.

Description

technical field [0001] The invention belongs to the field of marine environment remote sensing, and specifically relates to the fields of marine pollutants, marine ecological environment monitoring, marine water color remote sensing, water quality remote sensing and the like. This method extends the satellite remote sensing inversion technology of colored dissolved organic material (Colored dissolved organic material, CDOM, or yellow substance Yellow Substance) to polycyclic aromatic hydrocarbons in ocean surface water. [0002] (Polycyclic aromatic hydrocarbons, referred to as PAHs) monitoring system, the use of remote sensing means to achieve large-scale, periodic monitoring of persistent organic pollutants in the marine environment. Background technique [0003] Polycyclic aromatic hydrocarbons (PAHs) refer to aromatic hydrocarbons containing two or more benzene rings in the molecule, and are a class of persistent organic pollutants (Persistent Organic Pollutants, POPs) t...

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Problems solved by technology

[0004] At present, the monitoring method of PAHs in the marine environment is mainly carried out by combining on-site sampling and laboratory quantitative analysis. The traditional measurement method needs to send a large number of staff to the sea to collect samples one by one, and conduct a series of organic analysis pre-treatment on the samples. From sample collection, sample processing to sample determination, due to the extremely low concentration of PAHs in seawater, the requirements for measurement technology are relatively high, and the entire process takes a long time and requires a lot of manpower, financial resources

The ocean area is vast, the natural conditions are harsh, and the measurement cost is too high. The traditional monitoring method is low in efficiency and high in cost. It can only do point and line monitoring, and cannot realize large-scale monitoring of PAHs in the marine environment.

At the same time, PAHs in the marine environment have obvious dynamic changes with the moving water body, and traditional monitoring methods cannot achieve short-period and high-frequency monitoring

No matter in terms of sampling width or sampling period, traditional monitoring methods cannot meet the monitoring needs of large-scale and short-period

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