[Stoves] Exposure to PM 2.5 in YUnnan, China
Crispin Pemberton-Pigott
crispinpigott at gmail.com
Tue Aug 23 12:59:08 CDT 2011
Dear Friends
From:
INDOOR AIR
doi:10.1111/j.1600-0668.2011.00730.x
2011 John Wiley & Sons A/S
Patterns and predictors of personal exposure to indoor air pollution from
biomass combustion among women and children in rural China
By J. Baumgartner, J. J. Schauer, M. Ezzati,
L. Lu, C. Cheng, J. Patz, L. E. Bautista
Abstract Indoor air pollution (IAP) from domestic biomass combustion is an
important health risk factor, yet direct measurements of personal IAP
exposure are scarce. We measured 24-h integrated gravimetric exposure to
particles
<2.5 µm in aerodynamic diameter (particulate matter, PM2.5) in 280 adult
women and 240 children in rural Yunnan, China. We also measured indoor PM2.5
concentrations in a random sample of 44 kitchens. The geometric mean
winter PM2.5 exposure among adult women was twice that of summer exposure
[117 µg/m3 (95% CI: 107, 128) vs. 55 µg/m3 (95% CI: 49, 62)]. Childrens
geometric mean exposure in summer was 53 µg/m3 (95% CI: 46, 61). Indoor
PM2.5
concentrations were moderately correlated with womens personal exposure (r
= 0.58), but not for children. Ventilation during cooking, cookstove
maintenance, and kitchen structure were significant predictors of personal
PM2.5 exposure among women primarily cooking with biomass. These findings
can be used to develop exposure assessment models for future epidemiologic
research and inform interventions and policies aimed at reducing IAP
exposure.
+++++++++
I do not have a direct link to the document on line. For comparison, the
PM2.5 level in Ulaanbaatar in November rises to more than 4000 µg/m3 and
that is the outdoor air! It is actually cleaner to be inside the room with
the stoves. That is why there is so much effort being put into doing
something in Mongolia.
The handling of the 940 Teflon filters is described which is always good to
read to see what issues arose and how they were dealt with.
Regards
Crispin
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