Apparatus for acquisition of marine sediment porewater and on-line in-situ detection of gas in porewater, and control method thereof

Abstract

The invention provides an apparatus for acquisition of marine sediment porewater and on-line in-situ detection of gas in the porewater. The apparatus can realize in-situ, rapid and cyclic acquisition of the porewater and on-line in-situ detection of the composition and content of gas in the porewater. According to a technical scheme in the invention, the apparatus is characterized by comprising a counterweight (1), a shell (2), a gas cylinder (17) and a single-layer sampling point device (13), wherein the counterweight (1) is connected with the shell (2), the counterweight (1) is provided with a power supply and a signal path device (18), and the gas cylinder (17) and the single-layer sampling point device (13) are arranged in the shell (2) and connected with each other. The invention also discloses a control method for the apparatus.

Description

technical field [0001] The invention relates to the field of marine sediment pore water collection and detection, in particular to a marine sediment pore water collection and gas detection system that can collect pore water in situ, quickly and circularly, and can detect the gas composition and content in situ in the sediment pore water. An online in-situ detection device and a control method thereof. Background technique [0002] There are two ways to collect marine sediment pore water. One is to collect the sediment first, and then extract the pore water in the laboratory by means of pressing, centrifugation and vacuum filtration extraction. This method will cause the dissolved gas in the pore water to escape, The decomposition of organic components and the oxidation of variable valence ions make it difficult to reflect the original composition and information of pore water; the other is in-situ pore water extraction. At present, the devices that can be extracted in situ ...

AI Technical Summary

Problems solved by technology

For the in-situ collection of marine sediment pore water, most of them rely on the difference in hydrostatic pressure inside and outside the collection device to make the pore water of different sediment layers enter the sampler to complete the collection. The pore water cannot be collected circularly. Once it is blocked, it cannot work normally.

Although the device can realize the in-situ collection of pore water, the durability and efficiency of the working capacity of the equipment need to be improved

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