An in-situ test device and method for simulating the release of endogenous pollutants in marine sediments under the action of waves

Abstract

The invention relates to the technical field of marine sampling, and particularly discloses an in-situ testing device and method for simulating the release of endogenous pollutants in marine sediments under the action of waves. The in-situ test device includes an experimental platform, which is characterized in that: a battery compartment, a collection compartment and a test cabin are installed on the experimental platform, a hydraulic device is installed on the top of the experimental platform; a cylinder is installed on the top of the test cabin, and the cylinder is connected by a connecting rod. The pressure plate; the inner wall of the test chamber is provided with water intake holes of different heights, the middle of the outer wall is provided with a water inlet, and a number of vacuum sampling bottles connected to the collection tube are arranged in the collection chamber; both the test chamber and the collection chamber are connected to the battery chamber. The invention is reasonable in design and flexible in application, can be used for in-situ experiments on seabed sediments, overcomes the problem that it is difficult to maintain the original structure of sediments in the process of indoor test sediment sampling, simulates the load status under different natural conditions, and reveals seabed sediments Endogenous release rules.

Description

[0001] (1) Technical field [0002] The invention relates to the field of marine sampling technology and marine pollution sediment dynamics, in particular to an in-situ testing device and method for simulating the release of endogenous pollutants in marine sediments under the action of waves. [0003] (2) Background technology [0004] Marine sediments are a collection of various pollutants, and the research on the accumulation, migration and transformation of pollutants in sediments is an important part of marine environmental protection. The pollutants in marine sediments mainly come from urban sewage, industrial wastewater, ship discharge and accidental leakage. Nearshore activities have led to an increase in the concentration of pollutants in marine sediments. Sediments in bays, ports and coastal waters contain high concentrations of pollutants, such as heavy metals, tributyl phosphate, petroleum hydrocarbons, polychlorinated biphenyls, and pesticides. Insecticides, etc. ...

AI Technical Summary

Problems solved by technology

[0005] The existing marine sediment-water interface pollutant flux automatic sampling and monitoring device (200820075277.6) is mainly used to study the static diffusion of pollutants in sediments, to collect seawater samples under static conditions, and to analyze and measure the seabed sediment-water interface The flux of pollutants in the region, while the release of endogenous pollutants in marine sediments mainly comes from the release of pollutants in sediments caused by sediment resuspension under hydrodynamic conditions, so the automatic sampling and detection device for pollutant fluxes is completely closed , cannot be used to study the release of endogenous pollutants under wave conditions; an existing multifunctional submarine flux and sediment in-situ sampling device (CN201410181903.4) is mainly used to verify seabed release flux and in-situ sampling , due to the limitation of the penetration depth of the device flux incubator, it can only be used for the study of the release flux of the seabed surface sediment, and it cannot simulate the wave load. For the sediment disturbance test, the automatic sampling device does not consider the influence of the concentration difference, and the detection of water samples There is a large error with the actual on-site water samples; under natural conditions, the on-site observation of seabed sediments (201711271009.6) collects water samples through direct sampling. Due to the complex hydrodynamic conditions of the observation and the inability to be uniformly controlled, it is impossible to realize the phenomenon caused by the single variable of waves. Research on the release amount and release law of pollutants in water; for the research on the release of endogenous pollutants in sediments under the action of waves, at present, it is mainly through indoor tanks (201120134463.9), but it is difficult for indoor experimental sediment samples to restore the state in the ocean, and sediments During the process of sampling through the sampler and during transportation, the sediment will be disturbed. When the collected sediment is laid on the bottom of the tank, the bedding structure and physical and chemical properties of the sediment will be changed, and it is difficult to maintain the original structure of the sediment.

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