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A device for extracting volatile substances in water and sediment

A volatile substance and extraction device technology, which is applied in the field of volatile substance extraction devices, can solve the problems of complicated operation, easy exposure or leakage, inability to grasp the content of reducing substances, etc., and achieves the effect of increasing the residence time

Active Publication Date: 2017-06-06
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since hydrogen sulfide and ammonia are reducing gases, they are easily oxidized and diluted by air, so it is difficult to accurately identify and quantify these gases in the research work of odor pollution control
At present, the analysis of hydrogen sulfide and ammonia in water usually adopts 2-3 stages of series absorption devices. This method is not only complicated to operate, but also easily exposed or leaked, which brings certain difficulties to the analysis work.
And for the analysis of the malodorous gas in the sediment, there is no special analysis device at present, so the content of reducing substances in the sediment cannot be grasped

Method used

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  • A device for extracting volatile substances in water and sediment
  • A device for extracting volatile substances in water and sediment
  • A device for extracting volatile substances in water and sediment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment one: the extraction analysis of hydrogen sulfide and ammonia in water body

[0030] (1) Extraction analysis of hydrogen sulfide

[0031] The release of hydrogen sulfide in polluted water is one of the main causes of water stench. Therefore, in order to study the content level and release mechanism of malodorous gases in polluted water bodies, it is necessary to conduct quantitative analysis of dissolved hydrogen sulfide in water bodies. To this end, the research team selected the estuary of the Yuniao River in Yantai and the bay of Yangma Island as the research objects, and collected water samples from these waters for direct hydrogen sulfide analysis.

[0032] The operation is as follows:

[0033] In the first step, take 50ml of water sample and pour it directly into the liquid storage bottle 5, screw the connecting tee grinding port 4 into the liquid storage bottle 5, and then screw the absorber 2 and the vent pipe 3 into the tee grinding port 4 respectiv...

Embodiment 2

[0041] Example 2: Extraction analysis of different forms of sulfur in sediments

[0042] Sediment is an important source of the release of odorous substances in the water environment. In order to study the distribution and accumulation of pollutants in the sediments of different polluted waters, it is necessary to sample and analyze the sediments in different water environment media such as rivers, lakes and coastal zones. For this reason, the research team respectively selected the sediments of the Yuniao River Estuary and Yangma Island Bay in Yantai as the research objects, and carried out the acid-volatile sulfur, chromium-reducible sulfur and elemental sulfur in the sediments in this area using the device of the present invention. Distribution extraction, the specific steps are as follows:

[0043] The first step is to directly put the collected fresh sediment (about 10g) into the liquid storage bottle 5, screw the connecting tee grinding port 4 into the liquid storage bot...

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Abstract

The invention is a device for extraction of volatile substances such as sulfur-containing compounds in different forms and ammonia and the like in water body and sediments, the device includes a spherical tube, an absorber, a ventilation pipe, a liquid storage bottle, a sample feeding port, and the like, two openings are arranged below the spherical tube, a bracket is arranged above the spherical tube, the absorber is a U-shaped container with a connection pipe in the middle part, the ventilation pipe is a gas inlet device of nitrogen and other inert gases, the liquid storage bottle is a device for containing water or water body, sediments, and other environmental samples; the sample feeding port is provided with a rotating valve, is mainly used in injection of an extraction agent, and the device for extraction is provided with ground indicator joint connection to ensure air tightness. The device for extraction is a device for extraction of reducing and volatile substances in water body or sediments, and solves the problems that in prior art the reducing and volatile substances in water body or sediments cannot be extracted efficiently and the extraction is time consuming and labor consuming. The device is simple in equipment, easy to operate, and especially suitable for the extraction of the volatile substances in the water and sediments.

Description

technical field [0001] The invention relates to sample processing equipment for environmental science or environmental engineering and chemical analysis experiment research, in particular to a device for extracting volatile substances in water bodies and sediments. Background technique [0002] In recent years, due to the increasingly serious environmental problems caused by water pollution, residents' complaints about odor pollution of water bodies have increased year by year and have attracted widespread attention from all walks of life. Therefore, the research and control of odor pollution of water bodies and sediments has also been highly valued by relevant departments. The main cause of water body odor is the sulfur-containing gas (mainly hydrogen sulfide and organic sulfur-containing compounds) and ammonia released from polluted water under anaerobic conditions. However, since hydrogen sulfide and ammonia are reducing gases, they are easily oxidized and diluted by air...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22
Inventor 盛彦清孙启耀曲瑛璇李兆冉
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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