【摘要】 生物质燃烧是欠发达地区大气颗粒物污染的重要来源,生物质燃烧造成的室内空气污染是农村地区人群空气污染暴露的重要途径.对江苏农村室内PM2.5浓度及气象因素进行了分析,结果表明:燃烧水稻秆、木材时室内PM2.5平均浓度分别为114.3和87.5μg.m-3,明显高于未燃烧生物质燃料时的平均浓度水平(37.2μg.m-3);与气象因素的相关性分析表明,降水量和PM2.5浓度之间存在着强的负相关性,雨天的室内PM2.5平均浓度为24.1μg.m-3,仅为晴天的48%;通过分析室内源和室外源对室内PM2.5的贡献,室内PM2.5浓度主要受到生物质燃烧的直接影响室,同时室内外空气交换等方式造成的间接贡献也不可忽略;进一步分析表明,水稻秆和木材燃烧对室内PM2.5浓度的直接影响分别为52%和37%,而间接影响分别为7%和15%;生物质燃烧是农村室内PM2.5污染的主要来源,其对室内PM2.5污染的总贡献的比例达到50%以上.更多还原

【Abstract】 Biomass combustion is the major source of air pollution in developing district.Fine particles(PM2.5) in indoor air and meteorological data were researched in rural district of Jiangsu province.The results showed that: when burning rice straw and timber,the average concentrations of indoor PM2.5 were 114.3 and 87.5μg·m-3 separately,which were significantly higher than non-burning biomass fuels(the average concentration is 37.2μg·m-3).The mass concentration of indoor PM2.5 air was very opposite relationship with precipitation.When there was no burning activity,the concentration of indoor PM2.5 in rainy days was 24.1μg·m-3,only equal to 48.0% of the same situation in sunny days.And besides the direct impact,the indirect impact of biomass combustion on the indoor air was not neglected.The burning of rice straw and timber generates 52% and 37% of the indoor PM2.5 pollutant directly,and 7% and 15% indirectly,respectively.Bio-fuels,which contribute to more than 50% of the indoor PM2.5 pollutant,are the main source of the pollutant.更多还原