Apparatus for acquiring trace quantity of organic pollutants in large volume of seawater, and acquisition system thereof

Abstract

The invention relates to an apparatus for acquiring a trace quantity of organic pollutants in a large volume of seawater. The apparatus integrates a filter assembly and a dissolved pollutant enriching assembly, the filter assembly comprises filter units sequentially arranged along the water flow direction, a filter member is arranged between the outlet of a front filter unit and a rear filter unit, a communicating tube is arranged between adjacent filter units, the communicating tube is provided with a stopping device, the stopping device is opened when the pressure in the front filter unit reaches a preset value, and after the filter member of the front filter unit is obstructed, the water flows to the rear filter unit through the communicating tube and finally flows into the dissolved pollutant enriching assembly, so there is no need for a professional personnel to replace the filter member in the acquisition process. The invention also relates to a system adopting the apparatus. The system realizes the automatic switching of above two apparatuses through a controller, so a non-professional personnel can complete sampling by embarking the system on a merchant ship or a fixed platform. The apparatus and the system are suitable for sampling pollutants in water.

Description

technical field [0001] The invention relates to a water body pollutant sampler, in particular to a collection device and collection system for trace organic pollutants in large-volume seawater. Background technique [0002] Persistent organic pollutants (Persistent Organic Pollutants, POPs) are highly toxic, persistent, easy to bioaccumulate, and capable of long-distance migration. Therefore, it has become the consensus of the international community to control and weaken this type of compound. POPs are generally at trace levels in the environment, especially in the oceans. However, due to the huge seawater capacity of the earth, the ocean is an important reservoir of global POPs. A series of ocean physical and biogeochemical processes have long-term important effects on the sea-air exchange of POPs and the global biogeochemical cycle. Therefore, monitoring ocean POPs content is particularly important. [0003] Due to the extremely low content of POPs in the ocean, especia...

AI Technical Summary

Problems solved by technology

The particle filter unit is equipped with a filter screen. To filter a sample, the sample needs to pass through the filter screen continuously. Impurities such as particles in the sample can easily block the filter screen. Therefore, the filter screen must be replaced many times by professionals, and the operation is cumbersome. This kind of operation can only be realized on the scientific research ship, which greatly limits the collection of marine samples

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