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Passive sampling device for persistent organic pollutants (POPs) in air

A passive sampling device and organic pollutant technology, applied in the direction of sampling devices, etc., can solve the problems of expensive production and transportation, slow sampling speed, complex structure, etc., and achieve simplified extraction and purification operations, simple and convenient use, and high gas flow rate big effect

Inactive Publication Date: 2012-09-19
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When sampling, the SPMD sampler needs to be placed in a wooden Stevenson box without any chemical treatment to reduce the impact of environmental changes such as temperature, wind, frost, rain, and snow, and the operating procedures are more complicated
The PUF sampler has the disadvantages that the adsorbed particles and the collected gas samples are not easy to separate, and the test results are difficult to distinguish whether it is POPs in the particles or POPs in the gaseous state, and it is easy to be saturated, the sampling volume is small, and some POPs cannot reach the detection limit of the instrument and cannot be detected.
At present, the XRD resin sampler is an atmospheric passive sampling device using styrene-divinylbenzene copolymer XAD-2 powder as an adsorbent. Its disadvantages are complex structure, expensive production and transportation costs, cumbersome operation, and slow sampling speed. , limiting its popularization and application

Method used

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  • Passive sampling device for persistent organic pollutants (POPs) in air
  • Passive sampling device for persistent organic pollutants (POPs) in air
  • Passive sampling device for persistent organic pollutants (POPs) in air

Examples

Experimental program
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Effect test

Embodiment 1

[0016] The preparation of embodiment 1 sampling packing

[0017] ①Dissolve silicone oil II with dichloromethane;

[0018] ②According to the number and volume of the passive sampler to be prepared, weigh a certain amount of Shangshi 102 silanized white diatomite carrier and slowly pour it into the flask containing silicone oil II in a rotating manner, so that the carrier is completely submerged and cannot be condensed. Block, the coating amount of silicone oil II is calculated according to 3% of the mass of 102 silanized white diatomite in the above test;

[0019] ③ Using a rotary evaporator, vacuum rotary evaporation, the temperature of the water bath does not exceed 40 ° C, so that the dichloromethane solvent is slowly evaporated and removed;

[0020] ④ Volatilize and further dry in a fume hood in a natural environment, and the coated filler should be loose without agglomeration.

[0021] The filler is packed in a stainless steel cylinder with a stainless steel top cover co...

Embodiment 2

[0023] This embodiment combines the attached figure 1 , attached figure 2 And attached image 3 Be explained. The device comprises a stainless steel tube 1; the upper and lower ends of the stainless steel tube 1 are provided with a top cover 5; the stainless steel tube 1 is provided with a sampling filler 3; the top cover 5 is provided with a low density polyethylene film 2 and A stainless steel outer ring 6, the low-density polyethylene film 2 is fixed on the stainless steel outer ring 6; the film thickness of the low-density polyethylene film 2 is 65 μm. Both sides of the stainless steel cylinder 1 are provided with suspension rings 4 for fixing.

[0024] In the present embodiment, the cylinder height of the stainless steel cylinder 1 is 18 cm, the internal diameter of the cylinder is 3 cm, and the outside of the cylinder has external threads.

[0025] The outer diameter of the top cover 5 is 5cm, the height is 2cm, and the diameter of the low-density polyethylene film ...

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Abstract

The invention relates to a passive sampling device for persistent organic pollutants (POPs) in air. The passive sampling device comprises a stainless barrel, wherein top covers are arranged on upper and lower ends of the stainless barrel; sampling fillers are arranged in the stainless barrel; low-density polyethylene films and stainless outer rings are arranged on the top covers; each low-density polyethylene film is fixed on each stainless outer ring; and the thickness of each low-density polyethylene film is 65 to 90mu m. The POPs in the air or waste air can freely pass through the film, particulate matters in the environment can be prevented from being contacted with the fillers, and gaseous POPs in the ambient air can be acquired, so that the subsequent extraction and purification of a sample are simplified; each low-density polyethylene film is fixed to each top cover, so that the passive sampling device has the advantages that the gas flow volume is larger, and the sampling speed is quicker compared with an X-ray diffraction (XRD) resin sampler; due to the sealed device, the influence of natural environment on the device is small; and the device is not required to be arranged in a special device compared with the conventional polyurethane foam (PUF) passive sampling device and the conventional semi-permeable membrane device (SPMD) sampler, so that the device can be simply and conveniently used.

Description

technical field [0001] The invention relates to the technical field of monitoring ambient air and waste gas, and relates to a passive sampling device for measuring persistent organic pollutants in ambient air and waste gas. Background technique [0002] Persistent organic pollutants (POPs) refer to organic pollutants with strong chemical stability, difficult to degrade and transform, difficult to disappear in the environment, long-term retention, long-distance migration, bioaccumulation and toxicity. Recent studies have shown that many POPs are environmental hormones, and when they exist in the environment for a long time, they can disturb the endocrine system of humans and other organisms. With the rapid development of society and economy and the improvement of people's living standards, the production of solid waste is increasing year by year, and the pollution caused is becoming more and more serious. One of the important ways of pollution control is incineration. Due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22
Inventor 朱秀华陈吉平施泰安王炜穆军
Owner DALIAN JIAOTONG UNIVERSITY
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