High volume electrostatic field-sampler for collection of fine particle bulk samples |
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| Institution: | 1. Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark;2. National Institute of Occupational Health, Lersø Parkallé 104, DK-2100 Copenhagen, Denmark;1. Intelligent Building Operations, Construction Portfolio, National Research Council Canada, 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6, Canada;2. Air Quality Research Division, Atmospheric Science and Technology Directorate, Environment and Climate Change Canada, 335 River Road S., Ottawa, Ontario, K1A 0H3, Canada;1. HAE Research and Development Center, LG Electronics, Seoul 153-802, Republic of Korea;2. School of Mechanical Engineering, Yonsei University, Seoul 120-749, Republic of Korea;3. Yonsei Center for Clean Technology, Yonsei University, Seoul 120-749, Republic of Korea;1. Center For Environment, Health, and Welfare Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea;2. Aerosol & Particle Technology Laboratory, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea;3. Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials, 104 Sinseongno, Yuseong-gu, Daejeon 305-343, Republic of Korea;1. Pacific Northwest National Laboratory, 902 Battelle Blvd., Richland, WA, 99354, USA;2. The University of Texas at Austin, 110 Inner Campus Drive, Austin, TX, 78712, USA |
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| Abstract: | A high volume electrostatic field-sampler was developed for collection of fine particles, which easily can be recovered for subsequent sample characterisation and bioassays. The sampler was based on a commercial office air cleaner and consisted of a prefilter followed by electrostatic collection plates operating at 2.7 kV. The sampler performance was characterised for 26 nm to 5.4 μm-size particles in urban street air. The collection efficiency reached a maximum (60–70%) between 0.2 and 0.8 μm and dropped to ∼25% at 30 nm and 2.5 μm, respectively. After extraction in water, the particle loss was<2%. The extraction efficiency for dry lyophilised particulate matter was above 80%, allowing retrievement of ∼12 mg day−1 in urban street air at PM10 levels of ∼24 μg m−3. The ozone generating capacity of the corona discharge during operation was on the order of 10 ppb. A polycyclic aromatic hydrocarbons (PAH) degradation test using benzoa]pyrene as a model showed that ∼85% was degraded after 24 h. However, similar results were observed when the corona discharge was switched off. Hence, the ozone and other corona discharge reactants do not appear to contribute considerably to PAH-degradation. The overall results show that the sampler type is a promising alternative to traditional sampling of fine particles for bulk analysis and bioassays. The main advantages are simple operation, high stability, high quantifiable particle recovery rates and low cost. |
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