Passive sampling device and sampling method of atmospheric reactive gaseous mercury

A passive sampling device, gaseous mercury technology, applied in sampling devices, measuring devices, sampling and other directions, can solve the problems of high requirements for sampling personnel, limited coverage of monitoring points, and unsuitable for large-scale sampling layout. The effect of low cost and great flexibility

Inactive Publication Date: 2015-04-29
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional active sampling method relies on power supply as a power source, which is not suitable for sampling and monitoring in remote areas; the coverage of monitoring points is limited, and it is not suitable for large-scale sampling deployment; the requirements for sampling personnel are high, and researchers need to be on duty for a long time

Method used

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  • Passive sampling device and sampling method of atmospheric reactive gaseous mercury
  • Passive sampling device and sampling method of atmospheric reactive gaseous mercury
  • Passive sampling device and sampling method of atmospheric reactive gaseous mercury

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A passive sampling device for atmospheric active gaseous mercury, comprising a wind vane, a front air intake pipe, an air intake pipe connection port, a rear air intake pipe, a rotating shaft, and an active gaseous mercury collection pipe, the wind vane is respectively connected to the front air intake pipe and the rear end The intake pipe is connected, the front intake pipe and the rear intake pipe are connected through the intake pipe connection port, the entrance of the front intake pipe is provided with a concave groove, the rear intake pipe adopts an L-shaped hollow cylindrical structure, and the rear intake pipe is vertical The port is connected with the upper end of the active gaseous mercury trapping tube through the rotating shaft. The active gaseous mercury trapping tube includes the trapping tube outer tube, the trapping tube inner tube, the fixing frame and the rain cover, and the trapping tube outer tube is connected with the rotating shaft. The outer tube o...

Embodiment 2

[0043] A passive sampling method of atmospheric active gaseous mercury, carried out according to the following steps:

[0044] Step 1, preparation obtains the potassium chloride solution of 0.1mol / L;

[0045] Step 2, use the potassium chloride solution obtained in step 1 to rinse the inside of the outer tube of the trapping tube and the outside of the inner tube of the trapping tube for 5 times to obtain the trapping tube for activated gaseous mercury through rinsing;

[0046] Step 3, after connecting the activated gaseous mercury trapping tube obtained in step 2 with the wind vane, the front air intake pipe, the air intake pipe connection port, the rear air intake pipe and the rotating shaft, place it at the position to be detected;

[0047] Step 4. After the passive sampling device obtained in step 3 is placed in the field for 10 days, the active gaseous mercury trapping tube needs to be rinsed again with the 0.1 mol / L potassium chloride solution obtained in step 1.

Embodiment 3

[0049] A passive sampling method of atmospheric active gaseous mercury, carried out according to the following steps:

[0050] Step 1, preparation obtains the potassium chloride solution of 0.3mol / L;

[0051] Step 2, use the potassium chloride solution obtained in step 1 to rinse the inner side of the outer tube of the trapping tube and the outside of the inner tube of the trapping tube for 3 times to obtain a rinsed active gaseous mercury trapping tube;

[0052] Step 3, after connecting the activated gaseous mercury trapping tube obtained in step 2 with the wind vane, the front air intake pipe, the air intake pipe connection port, the rear air intake pipe and the rotating shaft, place it at the position to be detected;

[0053] Step 4. After the passive sampling device obtained in step 3 is placed in the field for 30 days, the active gaseous mercury trapping tube needs to be rinsed again with the 0.3 mol / L potassium chloride solution obtained in step 1.

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Abstract

The invention provides a passive sampling device and a sampling method of atmospheric reactive gaseous mercury. The passive sampling device is characterized in that a wind indicator is respectively connected with a front end air inlet pipe and a rear end air inlet pipe through a fixed bracket, the front end air inlet pipe and the rear end air inlet pipe are connected with each other through an air inlet pipe connecting opening, a concave groove is formed in an inlet of the front end air inlet pipe, the rear end air inlet pipe is in an L-shaped hollow cylindrical structure, a vertical opening of the rear end air inlet pipe is connected to the upper end of a reactive gaseous mercury capture pipe through a rotating shaft, the reactive gaseous mercury capture pipe comprises a capture pipe outer pipe, a capture pipe inner pipe, a fixed bracket and a rain shielding cover, the capture pipe outer pipe is connected with the rotating shaft, the capture pipe outer pipe is connected with the capture pipe inner pipe through an inner-outer pipe bonding point, the outer side of the capture pipe is provided with the fixed bracket, the rain shielding cover is arranged on the lower end of the capture pipe outer pipe, and the inner side of the capture pipe outer pipe and the outer side of the capture pipe inner pipe are respectively in an abrasive structure. By adopting the passive sampling device, no external power supply is needed. After the passive sampling device is arranged on an appropriate site, the guard of people is not needed, and the concentration situation of pollutants within a long time can be monitored.

Description

technical field [0001] The invention relates to the technical field of atmospheric monitoring, in particular to a passive sampling device for atmospheric active gaseous mercury and a sampling method thereof. Background technique [0002] Mercury is one of the most toxic heavy metals and pollutants. It has been listed as a priority pollutant by the Chinese government, the United Nations Environment Programme, the World Health Organization, the European Union and the US Environmental Protection Agency. Due to its special physical and chemical properties, mercury is the only heavy metal element that mainly exists in the atmosphere in the form of gas, and can be transported and diffused through the atmosphere to become a global pollutant. As the most important channel for mercury transport in the environment, the atmosphere plays an extremely important role in the global biogeochemical cycle of mercury. Mercury exists in the atmosphere in the form of elemental mercury (GEM, zer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22
CPCG01N1/2273
Inventor 童银栋王学军张巍刘宪华鲁逸人
Owner TIANJIN UNIV
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