Endotoxins in indoor air and settled dust in primary schools in a subtropical climate

Salonen, Heidi, Duchaine, Caroline, Létourneau, Valérie, Mazaheri, Mandana, Clifford, Sam, & Morawska, Lidia (2013) Endotoxins in indoor air and settled dust in primary schools in a subtropical climate. Environmental Science & Technology, 47(17), pp. 9882-9890.

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Abstract

Endotoxins can significantly affect the air quality in school environments. However, there is currently no reliable method for the measurement of endotoxins and there is a lack of reference values for endotoxin concentrations to aid in the interpretation of measurement results in school settings. We benchmarked the “baseline” range of endotoxin concentration in indoor air, together with endotoxin load in floor dust, and evaluated the correlation between endotoxin levels in indoor air and settled dust, as well as the effects of temperature and humidity on these levels in subtropical school settings. Bayesian hierarchical modeling indicated that the concentration in indoor air and the load in floor dust were generally (<95th percentile) < 13 EU/m3 and < 24,570 EU/m2, respectively. Exceeding these levels would indicate abnormal sources of endotoxins in the school environment, and the need for further investigation. Metaregression indicated no relationship between endotoxin concentration and load, which points to the necessity for measuring endotoxin levels in both the air and settled dust. Temperature increases were associated with lower concentrations in indoor air and higher loads in floor dust. Higher levels of humidity may be associated with lower airborne endotoxin concentrations.

Impact and interest:

9 citations in Scopus
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10 citations in Web of Science®

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ID Code: 62898
Item Type: Journal Article
Refereed: Yes
Keywords: Endotoxins , Air quality, children, schools, dust, indoor environments
DOI: 10.1021/es4023706
ISSN: 1520-5851
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Aerosols (040101)
Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > ENVIRONMENTAL SCIENCE AND MANAGEMENT (050200) > Environmental Monitoring (050206)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ENVIRONMENTAL ENGINEERING (090700) > Environmental Engineering not elsewhere classified (090799)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700) > Public Health and Health Services not elsewhere classified (111799)
Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000) > OTHER BUILT ENVIRONMENT AND DESIGN (129900) > Built Environment and Design not elsewhere classified (129999)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Funding:
Copyright Owner: Copyright 2013 American Chemical Society
Copyright Statement: This article is freely available from the American Chemical Society website 12 months after the publication date. See links to publisher website in this record.
Deposited On: 26 Sep 2013 02:11
Last Modified: 04 Sep 2014 22:18

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