Design and construction of a sampling system that can collect PM10, PM2.5 and PM1 samples simultaneously from atmosphere

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2019

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Ateş, Ömer

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In this study, a particulate matter (PM) sampling system that can collect PM10 (particulate matter with diameter of less than 10 μm), PM2.5 and PM1 samples simultaneously with a single pump on separate filters was constructed and validated. The sampler consisted of a F&J Specialty DF-1E carbon vane vacuum pump, with a flowrate of 115 L/min, and 3 channels connected to the pump through a manifold. Each channel had a cyclone, a filter holder of 47 mm diameter, a micro-orifice (critical orifice) for velocity control and a flowmeter. Diameter of the particles were controlled by the cyclones. The particles passing through the cyclones was collected at the filters. The sampler was first constructed with MFCs, then MFCs were replaced with critical orifices. Afterwards, components were placed into the permanent shelter and data logger system was installed and flow rate stability tests were carried out using Nuclepore and Teflon filters. Teflon filters were selected for better stability. Validation was carried out through parallel sampling of the new sampler against 1 SFU, 2 Hi-vol samplers and 1 Grimm EDM164 laser spectrometer for 24 days. Average concentrations were found for PM10, PM2.5 and PM1 as 25 ± 10, 13 ± 4.4 and 7.6 ± 2.9 µg m-3 respectively, which were in a good agreement with other samplers. The sampler constructed in this study is not currently available in the market and the final configuration cost around 57,000 ₺ (~$15,700) which is less than half of dichotomous sampler or 3 pcs. of single channel samplers that can fulfill the same sampling task.

Subject Keywords

Particle size determination., Particle Sampler, Cyclone, Critical Orifice, PM10, PM2.5, PM1.

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http://etd.lib.metu.edu.tr/upload/12624146/index.pdf
https://hdl.handle.net/11511/44296

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ö. Ateş, “Design and construction of a sampling system that can collect PM10, PM2.5 and PM1 samples simultaneously from atmosphere,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Environmental Engineering., Middle East Technical University, 2019.