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| Exposure of elderly to PM2.5 in Tianjin, China |
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Abstract This study aims to characterize personal PM2.5 exposure of elderlies and to provide data support for an epidemiological study that is to investigate potential health effects of PM pollution on Chinese elderly population. A total of 101elderly participants with mean age of 67were recruited for personal exposure measurements in Tianjin, China. Residential indoor and outdoor PM2.5 concentrations were monitored simultaneously in summer (13th June~2nd July) and winter (30th November~12th December) of 2011. The results showed that the participants spent more than 85% of their time at home. Personal PM2.5concentrations were (124.2±75.2) μg/m3in summer and (170.8±126.6) μg/m3in winter. After time adjustment based on personal activity, the difference between measured and estimated personal concentration were 0.6~220.9μg/m3in summer and 0.6~416.8 μg/m3in winter. Among the participants, smokers had higher personal PM2.5 concentrations compared to non-smokers in both seasons. Personal PM2.5 concentrations were moderately correlated with indoor PM2.5concentrations and highly correlated with outdoor PM2.5 concentrations. This indicates that outdoor ambient PM2.5 level may be used as a surrogate to personal exposure of PM2.5.
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Received: 19 June 2014
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