Device for collecting in-situ interstitial water and overlying water of offshore sediments

Abstract

The invention relates to a device for collecting an offshore water sample, in particular to a device for collecting in-situ interstitial water and overlying water of offshore sediments. The device comprises an interstitial water sampling head, an overlying water sampling head, a connecting pipe and a handle which are connected in sequence, the interstitial water sampling head comprises an interstitial water capillary tube, the overlying water sampling head comprises an overlying water capillary tube, one end of the interstitial water capillary tube and one end of the overlying water capillarytube are respectively arranged in the corresponding sampling heads, the other ends of the interstitial water capillary tube and the overlying water capillary tube are connected with hoses, and the twohoses penetrate the connecting tube, extend out of the handle and are respectively connected with the syringes. Interstitial water is collected by the interstitial water sampling head, the overlyingwater is collected by the overlying water sampling head, and the overlying water sampling head and the overlying water sampling head form a vacuum environment through the injector, so that the overlying water can be prevented from being brought into the interstitial water in the collection process during collection, the collection difficulty of the overlying water is reduced, and the problem thatthe overlying water is inevitably brought into the interstitial water in the collection process in the prior art is solved.

Description

technical field [0001] The invention relates to a device for collecting offshore seawater samples, in particular to a collection device for in-situ interstitial water and overlying water of offshore sediments. Background technique [0002] Due to the significant impact of human activities on the offshore area, a large amount of suspended particulate matter enters the ocean. When the suspended matter entering the ocean settles to the bottom of the sea, it begins to be in a loose state and distributed in layers. After diagenesis such as compaction, cementation and recrystallization, the consolidation status and composition of deep sediments are different from those of the surface layer, and the composition of sediment interstitial water also changes with the depth of deposition. During the process of burial and mineralization on the seabed, organic matter in sediments will undergo material absorption or exchange with seawater, and the main way of exchange is through the trans...

AI Technical Summary

Problems solved by technology

[0006] 1. Interstitial water is inevitably brought into the overlying water during the collection process;

[0007] 2. It is difficult to collect overlying water;

[0008] 3. The in-situ collection cannot be guaranteed, making the data of the chemical composition and content of the interstitial water and overlying water after collection inaccurate

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