Laboratory experiments on indoor bioaerosol deposition onto various surface materials

Vuokko Lappalainen, Anniina Salmela, Markus Honkanen, Aku Karvinen, Ilpo Kulmala, Pertti Pasanen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    Increasingly, people spend their time indoors and at the same time cases of unacceptable indoor air quality are on the rise. Poor indoor air quality has been shown to cause respiratory symptoms, irritation, and other short- and long-term health outcomes. Indoor air quality problems are usually complex and a sum of several factors or failures in the building or structures. Unbalanced or poorly maintained ventilation system induces uncontrolled air leakages through building envelope. In case of moisture damage, air leakages may transport microbial spores, smaller fragments and metabolic products from microbial growth inside building structures into indoor environment, surfaces and air. In BITEFA project, bioaerosol deposition on various surface materials and flow fields were studied with Penicillium brevicompactum spores in a duct form test chamber. The air velocities of the system were similar to those in ventilated apartment buildings. Three commonly used materials were placed on horizontal and vertical surfaces at various flow field locations in the test chamber. Deposition was measured with cultural based and digital microscopic methods. As expected, clear differences were observed on deposition rates which was highest for horizontal upward facing surfaces and lowest for ceiling with low air velocity. Results indicate that viable bioaerosol deposition rate is highly dependent on particle size, air velocity and air flow direction towards the surface. Smaller non-viable particles are available deposit on all surfaces, vertical and horizontal. Because of smaller size of particles, the gravitation is not the major deposition mechanism. Small particles deposit by interception and diffusion. This study gives more information on practice of surface bioaerosol sampling in indoor environment investigations.
    Original languageEnglish
    Title of host publicationProceedings of IAQVEC 2016
    Publication statusPublished - 2016
    MoE publication typeA4 Article in a conference publication
    Event9th International Conference on Indoor Air Quality Ventilation & Energy Conservation, IAQVEC 2016 - Songdo, Korea, Republic of
    Duration: 23 Oct 201626 Oct 2016

    Conference

    Conference9th International Conference on Indoor Air Quality Ventilation & Energy Conservation, IAQVEC 2016
    Abbreviated titleIAQVEC 2016
    CountryKorea, Republic of
    CitySongdo
    Period23/10/1626/10/16

    Fingerprint

    air
    indoor air
    air quality
    flow field
    leakage
    spore
    interception
    material
    laboratory experiment
    airflow
    ventilation
    particle size
    moisture
    damage
    sampling
    particle
    test
    rate
    indoor environment

    Keywords

    • indoor air quality
    • bioaerosols
    • deposition

    Cite this

    Lappalainen, V., Salmela, A., Honkanen, M., Karvinen, A., Kulmala, I., & Pasanen, P. (2016). Laboratory experiments on indoor bioaerosol deposition onto various surface materials. In Proceedings of IAQVEC 2016 [Particle 1222]
    Lappalainen, Vuokko ; Salmela, Anniina ; Honkanen, Markus ; Karvinen, Aku ; Kulmala, Ilpo ; Pasanen, Pertti. / Laboratory experiments on indoor bioaerosol deposition onto various surface materials. Proceedings of IAQVEC 2016. 2016.
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    title = "Laboratory experiments on indoor bioaerosol deposition onto various surface materials",
    abstract = "Increasingly, people spend their time indoors and at the same time cases of unacceptable indoor air quality are on the rise. Poor indoor air quality has been shown to cause respiratory symptoms, irritation, and other short- and long-term health outcomes. Indoor air quality problems are usually complex and a sum of several factors or failures in the building or structures. Unbalanced or poorly maintained ventilation system induces uncontrolled air leakages through building envelope. In case of moisture damage, air leakages may transport microbial spores, smaller fragments and metabolic products from microbial growth inside building structures into indoor environment, surfaces and air. In BITEFA project, bioaerosol deposition on various surface materials and flow fields were studied with Penicillium brevicompactum spores in a duct form test chamber. The air velocities of the system were similar to those in ventilated apartment buildings. Three commonly used materials were placed on horizontal and vertical surfaces at various flow field locations in the test chamber. Deposition was measured with cultural based and digital microscopic methods. As expected, clear differences were observed on deposition rates which was highest for horizontal upward facing surfaces and lowest for ceiling with low air velocity. Results indicate that viable bioaerosol deposition rate is highly dependent on particle size, air velocity and air flow direction towards the surface. Smaller non-viable particles are available deposit on all surfaces, vertical and horizontal. Because of smaller size of particles, the gravitation is not the major deposition mechanism. Small particles deposit by interception and diffusion. This study gives more information on practice of surface bioaerosol sampling in indoor environment investigations.",
    keywords = "indoor air quality, bioaerosols, deposition",
    author = "Vuokko Lappalainen and Anniina Salmela and Markus Honkanen and Aku Karvinen and Ilpo Kulmala and Pertti Pasanen",
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    Lappalainen, V, Salmela, A, Honkanen, M, Karvinen, A, Kulmala, I & Pasanen, P 2016, Laboratory experiments on indoor bioaerosol deposition onto various surface materials. in Proceedings of IAQVEC 2016., Particle 1222, 9th International Conference on Indoor Air Quality Ventilation & Energy Conservation, IAQVEC 2016, Songdo, Korea, Republic of, 23/10/16.

    Laboratory experiments on indoor bioaerosol deposition onto various surface materials. / Lappalainen, Vuokko; Salmela, Anniina; Honkanen, Markus; Karvinen, Aku; Kulmala, Ilpo; Pasanen, Pertti.

    Proceedings of IAQVEC 2016. 2016. Particle 1222.

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    TY - GEN

    T1 - Laboratory experiments on indoor bioaerosol deposition onto various surface materials

    AU - Lappalainen, Vuokko

    AU - Salmela, Anniina

    AU - Honkanen, Markus

    AU - Karvinen, Aku

    AU - Kulmala, Ilpo

    AU - Pasanen, Pertti

    PY - 2016

    Y1 - 2016

    N2 - Increasingly, people spend their time indoors and at the same time cases of unacceptable indoor air quality are on the rise. Poor indoor air quality has been shown to cause respiratory symptoms, irritation, and other short- and long-term health outcomes. Indoor air quality problems are usually complex and a sum of several factors or failures in the building or structures. Unbalanced or poorly maintained ventilation system induces uncontrolled air leakages through building envelope. In case of moisture damage, air leakages may transport microbial spores, smaller fragments and metabolic products from microbial growth inside building structures into indoor environment, surfaces and air. In BITEFA project, bioaerosol deposition on various surface materials and flow fields were studied with Penicillium brevicompactum spores in a duct form test chamber. The air velocities of the system were similar to those in ventilated apartment buildings. Three commonly used materials were placed on horizontal and vertical surfaces at various flow field locations in the test chamber. Deposition was measured with cultural based and digital microscopic methods. As expected, clear differences were observed on deposition rates which was highest for horizontal upward facing surfaces and lowest for ceiling with low air velocity. Results indicate that viable bioaerosol deposition rate is highly dependent on particle size, air velocity and air flow direction towards the surface. Smaller non-viable particles are available deposit on all surfaces, vertical and horizontal. Because of smaller size of particles, the gravitation is not the major deposition mechanism. Small particles deposit by interception and diffusion. This study gives more information on practice of surface bioaerosol sampling in indoor environment investigations.

    AB - Increasingly, people spend their time indoors and at the same time cases of unacceptable indoor air quality are on the rise. Poor indoor air quality has been shown to cause respiratory symptoms, irritation, and other short- and long-term health outcomes. Indoor air quality problems are usually complex and a sum of several factors or failures in the building or structures. Unbalanced or poorly maintained ventilation system induces uncontrolled air leakages through building envelope. In case of moisture damage, air leakages may transport microbial spores, smaller fragments and metabolic products from microbial growth inside building structures into indoor environment, surfaces and air. In BITEFA project, bioaerosol deposition on various surface materials and flow fields were studied with Penicillium brevicompactum spores in a duct form test chamber. The air velocities of the system were similar to those in ventilated apartment buildings. Three commonly used materials were placed on horizontal and vertical surfaces at various flow field locations in the test chamber. Deposition was measured with cultural based and digital microscopic methods. As expected, clear differences were observed on deposition rates which was highest for horizontal upward facing surfaces and lowest for ceiling with low air velocity. Results indicate that viable bioaerosol deposition rate is highly dependent on particle size, air velocity and air flow direction towards the surface. Smaller non-viable particles are available deposit on all surfaces, vertical and horizontal. Because of smaller size of particles, the gravitation is not the major deposition mechanism. Small particles deposit by interception and diffusion. This study gives more information on practice of surface bioaerosol sampling in indoor environment investigations.

    KW - indoor air quality

    KW - bioaerosols

    KW - deposition

    M3 - Conference article in proceedings

    SN - 979-11-959724-0-1

    BT - Proceedings of IAQVEC 2016

    ER -

    Lappalainen V, Salmela A, Honkanen M, Karvinen A, Kulmala I, Pasanen P. Laboratory experiments on indoor bioaerosol deposition onto various surface materials. In Proceedings of IAQVEC 2016. 2016. Particle 1222