Monitoring method of persistent organic pollutants in atmospheric particulates based on particulate continuous monitor

Abstract

The invention discloses a monitoring method of persistent organic pollutants in atmospheric particulates based on a particulate continuous monitor. The monitoring method sequentially comprises the following steps: collection of atmospheric particulate samples with a specific particle size range, acquisition of a filter membrane, analysis of the persistent organic pollutants in the atmospheric particulate samples, and calculation of concentration. The monitoring method is rooted in established automatic air quality monitoring networks at home and abroad, creatively uses the particulate continuous monitor which is used for conventional atmospheric particulate monitoring in the monitoring of the persistent organic pollutants such as dioxins, polychlorinated biphenyls and polybrominated diphenyl ether in the atmospheric particulates, so that the accuracy, stability and continuity of monitoring results are ensured, zero additional sampling cost and zero additional energy consumption are realized, and a new way for the monitoring of the persistent organic pollutants in atmospheric fine particulates such as PM2.5 is opened up.

Description

technical field [0001] The invention relates to the technical field of air pollutant monitoring, in particular to a method for monitoring persistent organic pollutants in atmospheric particulate matter based on a continuous particulate matter monitor. Background technique [0002] Due to the potential harm to human health, persistent organic pollutants (POPs) have become one of the focuses of the international community today. The atmosphere is the main medium for the transmission of POPs in the environment, and it is also an important way for the human body to be exposed to the environment of POPs. Since POPs in the atmosphere often exist in the form of gas phase and solid phase (ie, particle-bound state), and its content is very small, generally pg / m 3 even fg / m 3 , thus placing high demands on sampling and analysis techniques. Although laboratories equipped with advanced instruments such as high-resolution gas chromatography / high-resolution mass spectrometry can meet t...

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Problems solved by technology

Since the environmental conditions of each point are not the same, and there are seasonal differences, in order to obtain a more reliable sampling rate, it is necessary to invest a lot of manpower, material resources and financial resources in the calibration process

[0006] 2. There is particle interference in gas phase POPs collection: PUF-PAS is designed for gas phase POPs, but in fact, since ultrafine particles (kinetic diameter Environ. Sci. Technol. 2008 (42): 550-555)

Since the collected gas and solid two-phase POPs are all adsorbed by polyurethane foam, it is impossible to distinguish the adsorption amount of gas and solid phase POPs, which interferes with the calibration of gas phase POPs sampling rate and the calculation of gas phase POPs concentration

[0007] 3. Solid-phase POPs cannot be completely collected: From the above, PUF-PAS can only collect part of the particulate matter in the atmosphere, so it cannot realize the complete collection of solid-phase POPs

[0011] Although based on β The particle continuous monitoring instrument of the ray method and the micro-oscillating balance method has been widely used in the continuous monitoring of ambient air particles at home and abroad, but there is no report on its application to the monitoring of POPs in atmospheric particles

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