Submarine sediment interstitial water in-situ acquisition system

Abstract

The invention relates to a submarine sediment interstitial water in-situ extraction system, which can realize the long-term continuous in-situ layered acquisition of sediment interstitial water samples. The system consists of a lifting joint, floating balls, a bracket, releasers, fluid acquirers, connecting parts and a layered penetration connecting elements, wherein the lifting joint is positioned above the bracket; the layered penetration connecting element is positioned below the bracket, and is formed by assembling penetration connecting elements and filtering rings; the filtering rings are arranged between the connecting parts; sampling ports of each filtering ring are connected with the fluid acquirers by pipelines respectively; and the fluid acquirers, the releasers and the floating balls are arranged on the bracket respectively. After sampling is finished, a releaser deck unit transmits a releasing instruction to the releasers on board to separate the fluid acquirers from an in-situ layered penetration part, and the fluid acquirers float up to the sea surface for recycling. The system realizes the long-term continuous in-situ layered acquisition of sediment interstitial water, and can continuously acquire time sequence samples of a year by once deployment and recycling operation.

Description

technical field [0001] The invention belongs to the technical field of detection of substances or objects, and in particular relates to an in-situ collection system for interstitial water in seabed sediments. Background technique [0002] In the ocean, as the particulate matter in the water column settles to the seafloor to form sediments, part of the seawater will remain in the spaces between the sediment particles, forming sediment interstitial water. The physical and chemical characteristics of interstitial water in seabed sediments are a comprehensive reflection of various processes in sediments. The study of interstitial water can provide an important window for understanding the relevant processes of the seabed. Therefore, a large number of researches on interstitial water in sediments have been carried out at home and abroad. . A growing body of data indicates that processes occurring in seafloor sediments not only vary spatially but also have time-varying signatures...

AI Technical Summary

Problems solved by technology

The operation process of centrifugation or pressing may cause pollution and changes in the sediment interstitial water itself due to changes in environmental conditions. Therefore, the interstitial water obtained by centrifugation or pressing methods often cannot reflect the original situation well, and Unable to get time series samples

The cavity is used to realize the in-situ collection of sediment interstitial water on the seabed, and the in-situ layered collection is realized. However, only one sample can be collected for one sampling layer in each operation, and time-series sample collection at the same position cannot be performed.

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