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The spatial and temporal variations in PM10 mass from six UK homes
K A BéruBé1, K J Sexton, T P Jones
1School of Biosciences, Cardiff University, P.O. Box 911, Museum Avenue, Cardiff CF10 3US, Wales, UK. BeruBe@Cardiff.ac.uk
The Science of the Total Environment
|April 15, 2004
Summary
Indoor airborne particulate matter (PM10) pollution is greater than outdoor levels. Outdoor sources and indoor activities, especially smoking, significantly influence indoor PM10 composition, impacting domestic air quality.
Area of Science:
- Environmental Health
- Indoor Air Quality Research
- Particulate Matter Analysis
Background:
- Humans spend most of their time indoors, making domestic environments critical for health.
- Airborne particulate pollution indoors poses significant health risks.
- Understanding indoor/outdoor air quality dynamics is essential for public health.
Purpose of the Study:
- To investigate indoor and outdoor air quality in various domestic settings.
- To analyze the spatial and temporal variations of PM10 mass and composition.
- To identify sources and influencing factors of indoor particulate matter.
Main Methods:
- Monitored PM10 mass concentrations indoors (kitchen, living room, bedroom) and outdoors across six homes in Wales and Cornwall over one year.
- Recorded ambient weather conditions and household activities, including smoking.
- Utilized gravimetric analysis for PM10 quantification and scanning electron microscopy for particle identification.
Main Results:
- Indoor environments exhibited higher PM10 mass concentrations compared to outdoor air.
- Outdoor sources were the primary contributors to indoor PM10 composition.
- Indoor anthropogenic activities, particularly tobacco smoking, significantly altered indoor PM10 characteristics.
Conclusions:
- Indoor PM10 levels are generally higher than outdoor levels.
- The composition of indoor PM10 is predominantly influenced by outdoor sources, with indoor activities playing a secondary role, except in smoking households.
- Indoor and outdoor PM10 consist of a heterogeneous mixture of particles including soot, fibers, sea salt, and biological components.