Air pollutants in rural homes in Guizhou, China – Concentrations, speciation, and size distribution
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- 作者：Shuxiao Wang ; Wei Wei ; Du Li ; Kristin Aunan ; Jiming Hao
- 关键词：Indoor air quality ; PM ; CO ; CO2 ; VOC
- 刊名：Atmospheric Environment
- 出版年：2010
- 出版时间：November 2010
- 年：2010
- 卷：44
- 期：36
- 页码：4575-4581
- 全文大小：273 K
文摘
Several types of fuels, including coal, fuel wood, and biogas, are commonly used for cooking and heating in Chinese rural households, resulting in indoor air pollution and causing severe health impacts. In this paper, we report a study monitoring multiple pollutants including PM10, PM2.5, CO, CO2, and volatile organic compounds (VOCs) from fuel combustion at households in Guizhou province of China. The results showed that most pollutants exhibited large variability for different type of fuels except for CO2. Among these fuels, wood combustion caused the most serious indoor air pollution, with the highest concentrations of particulate matters (218417 μg m−3 for PM10 and 201304 μg m−3 for PM2.5), and higher concentrations of CO (10.8 ± 0.8 mg m−3) and TVOC (about 466.7 ± 337.9 μg m−3). Coal combustion also resulted in higher concentrations of particulate matters (220250 μg m−3 for PM10 and 170200 μg m−3 for PM2.5), but different levels for CO (respectively 14.5 ± 3.7 mg m−3 for combustion in brick stove and 5.5 ± 0.7 mg m−3 for combustion in metal stove) and TVOC (170 mg m−3 for combustion in brick stove and 700 mg m−3 for combustion in metal stove). Biogas was the cleanest fuel, which brought about the similar levels of various pollutants with the indoor case of non-combustion, and worth being promoted in more areas. Analysis of the chemical profiles of PM2.5 indicated that OC and EC were dominant components for all fuels, with the proportions of 3048 % . A high fraction of SO42− (3134 % ) was detected for coal combustion. The cumulative percentages of these chemical species were within the range of 0.71.3, which was acceptable for the assessment of mass balance.