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A passive sampling device for persistent organic pollutants in the atmosphere

A passive sampling device and organic pollutant technology, applied in sampling devices, measuring devices, sampling, etc., can solve the problems of small sampling capacity, difficult detection results, easy to achieve saturated adsorption, etc., and achieve large gas flow rate and fast sampling speed , a wide linear range of effects

Inactive Publication Date: 2018-09-25
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used PUF passive sampler is difficult to separate the adsorbed particles from the collected gas samples. It is difficult to distinguish whether the test results are POPs in the particles or POPs in the gaseous state, and its sampling capacity is small. low) cannot reach the detection limit of the instrument, and cannot be detected; it is easy to reach saturated adsorption, and cannot be linearly sampled for a long time.
[0008] The physical and chemical properties and toxic effects of HBCDs and SCCPs are quite different from the 12 classic POPs initially included in the Convention and the new POPs newly added to the controlled list of the "Stockholm Convention" in 2009, 2011 and 2013. There are no reports on the development of proprietary passive samplers and sampling materials for this type of substance

Method used

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  • A passive sampling device for persistent organic pollutants in the atmosphere
  • A passive sampling device for persistent organic pollutants in the atmosphere
  • A passive sampling device for persistent organic pollutants in the atmosphere

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A kind of preparation method of hexabromocyclododecane and short-chain chlorinated paraffin passive sampling material in atmosphere, described preparation method comprises the steps:

[0039] ①Soak the polyurethane foam disc in the mixture of n-hexane and dichloromethane with a volume ratio of 1:1 for 12 hours, ultrasonically extract for 1 hour, remove the extract, then add the above mixture for ultrasonic extraction for 1 hour, remove the extract, repeat twice and volatilize the mixed solution in the polyurethane foam disc to obtain a pretreated polyurethane foam disc.

[0040] ②Immerse the pretreated polyurethane foam disc in a solution of 20M polyethylene glycol with a concentration of 1.143g / L in dichloromethane. After the dichloromethane volatilizes, it is aged at 50°C for 30 minutes to obtain passive short-chain chlorinated paraffins in the atmosphere. Sampling material, the weight of the polyethylene glycol 20M is 8% of the weight of the polyurethane foam.

Embodiment 2

[0042] A passive sampling device for persistent organic pollutants in the atmosphere, the passive sampling device includes a stainless steel cylinder body 1, a stainless steel passive sampling material rack 2, and a stainless steel cylinder cover 3; the cylinder wall and cylinder bottom of the cylinder body 1 are evenly covered with Several holes, the aperture of which is 3mm, the passive sampling material rack 2 is a through-tube structure, the bottom of the passive sampling material rack 2 is provided with a cross-shaped stainless steel support 21 to support the passive sampling material prepared in Example 1, so The passive sampling material prepared by embodiment 1 is provided in the passive sampling material rack 2, the top of the passive sampling material rack 2 is provided with a filter membrane, the passive sampling material rack 2 is provided with a hook 22, and the passive sampling material rack 2 is provided with a hook 22. 2 is suspended in the cylinder body 1, and ...

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Abstract

The invention relates to a passive sampling device for sampling long-lasting organic pollutants in the atmosphere, and belongs to the technical field of environmental atmosphere and waste gas monitoring. The passive sampling device comprises a cylinder, a passive sampling material rack, and a cylinder cover. The wall and bottom of the cylinder are both provided with a plurality of holes, which are uniformly arranged. The passive sampling material rack is hung in the cylinder. The top of the passive sampling material rack is provided with a filter membrane. A passive sampling material is arranged in the passive sampling material rack. The top of the cylinder is connected to the cylinder cover. The passive sampling material is prepared by loading polyethylene glycol 20M with a high absorption performance on polyurethane foams, the acting force between the passive sampling material and hexabromocyclododecane / short chain chlorinated paraffin is enhanced therefore; and compared with the conventional polyurethane foam passive sampling device, the provided passive sampling device has the advantages that the sampling capacity is large, the linear range is wide, and the detectable rate of hexabromocyclododecane in a gas phase and short chain chlorinated paraffin with a high carbon number and high chlorinated rate is increased.

Description

technical field [0001] The invention relates to a passive sampling device for persistent organic pollutants in the atmosphere, which belongs to the technical field of ambient atmosphere and waste gas monitoring. Background technique [0002] Persistent organic pollutants (POPs) have attracted global attention because of their refractory environmental persistence, long-distance global transport, bioaccumulation and toxicity (such as carcinogenicity, developmental toxicity, teratogenicity, immunological and reproductive Toxicity, as an endocrine disruptor may cause male feminization, etc.). POPs are often transported across international boundaries by air, water and migratory species and deposited in areas far from their discharge sites, where they subsequently accumulate in terrestrial and aquatic ecosystems. Although the production of certain persistent organic pollutants has been banned, they still exist in the environment and have been detected in water, air, and soil, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22
CPCG01N1/2273
Inventor 朱秀华袁和平陈吉平白浩高媛王炜董学伟
Owner DALIAN JIAOTONG UNIVERSITY
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