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In-situ layering collection device for pore water of cylindrical sediments in shallow water area

A collection device and sediment technology, applied in the field of environmental science or environmental engineering, can solve problems such as oxidation or loss, troubles in research work, and inability to grasp the content of reducing substances, so as to achieve the effect of guaranteeing the original properties

Inactive Publication Date: 2016-11-23
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, laboratory (displacement) high-speed centrifugation is usually used to obtain sediment pore water, but this method is very limited for obtaining columnar sediment pore water (obtained by layered centrifugation, usually the layer thickness is 2cm, so The amount of water obtained by centrifugation is less), and the obtained pore water is very easy to be exposed or leaked (oxidation or loss, etc.), which has caused certain problems to the research work
For in-situ acquisition of layered pore water in sediments, there is no special device at present, so the content of reducing substances in sediment pore water cannot be grasped

Method used

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  • In-situ layering collection device for pore water of cylindrical sediments in shallow water area
  • In-situ layering collection device for pore water of cylindrical sediments in shallow water area
  • In-situ layering collection device for pore water of cylindrical sediments in shallow water area

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: Collection of sediment pore water in rivers and lakes

[0027] (1) Collection of river sediment pore water

[0028] River water pollution is closely related to the release of endogenous pollution from river black and odorous sediments. Therefore, in order to study the pollution load of polluted water bodies and identify pollution sources, it is necessary to study the release of major pollutants in sediment pore water. To this end, the research team selected the Wandering River in Yantai as the research object, and set up three sampling stations in the upper, middle and lower reaches of the river to collect pore water in the columnar sediments of the river for analysis of major black-causing elements such as iron and manganese.

[0029] The operation is as follows:

[0030] In the first step, the pore water sampler (see appendix figure 1 ) to the predetermined sampling station, connect the outer ring 1 of the column with ropes and fix the load-bearing lead ...

Embodiment 2

[0038] Example 2: Collection of pore water in bay sediments

[0039] The release of pollutants in sediment through pore water is also one of the main sources of water pollution in semi-enclosed bays and other coastal waters. Therefore, it is very important to understand the release flux of sediment pore water under the influence of tides. In-situ sampling and analysis of the main pollutants. For this reason, the research team respectively selected the pore water in the sediments of the Jiahe Estuary, Taozi Bay and Sishili Bay in Yantai as the research objects, and carried out the determination of the heavy metal content in the pore water of the columnar sediments in this area using the device of the present invention. For the layered collection of columnar sediment pore water, the specific steps are the same as the collection method of columnar sediment pore water in rivers and lakes, except that in the area with a water depth of about 2 meters, the depth for divers to enter t...

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Abstract

The invention relates to sample collection equipment in the field of environmental science or environmental engineering, in particular to an in-situ layered collection device for columnar sediment pore water in shallow water areas. It includes a cylinder, a sealed layered disk, a water guide pipe and a suction device, wherein the cylinder is a hollow structure and has a plurality of water seepage inlet holes on the side wall, the sealed layered disk is arranged inside the cylinder, and the sealed sub The layer plate is provided with multiple storage areas along the axial direction, and a pipeline groove is arranged in the center. The pipeline groove is provided with a plurality of water suction holes connected with each storage area. There are multiple water guide pipes in the pipeline groove. The lower end of each water guide pipe They are respectively connected with each storage area, and the upper end protrudes from the cylinder, which is the collection end. The suction device is used to collect sediment pore water in each layer of storage area at the collection end of each aqueduct. The sampling process of the present invention has no direct contact with air, and does not require operations such as sample pretreatment, cutting and separation, and high-speed centrifugation, thereby effectively ensuring the original properties of pore water.

Description

technical field [0001] The invention relates to sample collection equipment in the field of environmental science or environmental engineering, in particular to an in-situ layered collection device for columnar sediment pore water in shallow water areas. Background technique [0002] Sediments are an important part of the water environment, and the release of endogenous pollutants in sediments is one of the main sources of water quality deterioration. Studying various geochemical characteristics of sediment pore water has important theoretical and practical significance for revealing sedimentary environment, water pollution and protecting water resources. Pore ​​water plays a key role in the release of endogenous substances in sediments. That is, the pollutants adsorbed by the sediment are first released into the pore water, and then further diffuse into the overlying water through the pore water, thus causing the source pollution of the water body. Therefore, an accurate ...

Claims

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Application Information

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IPC IPC(8): G01N1/14
Inventor 盛彦清李兆冉孙启耀孙祥彧孙韶玲
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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