【摘要】 为了解苏南农村地区大气细颗粒物的污染水平及其可能的来源,在2002年7月—2003年1月的夏、秋、冬3个季节对雪堰镇和太湖站PM2.5进行采样和分析,得到了PM2.5和14种组成元素的质量浓度.研究表明,苏南农村地区PM2.5的污染水平较高,S,Zn,Pb和As 4种污染元素的质量浓度水平与城市接近;组成元素的季节分布规律存在区域差异,这可能与局地源的贡献,大气细颗粒物中、长距离传输以及复杂的气象条件有关.因子分析结果表明,土壤源、燃煤源、冶金或垃圾焚烧和汽车尾气4类源对PM2.5有明显贡献,说明人类活动对苏南农村地区PM2.5具有重要影响.更多还原

【Abstract】 To understand pollution level and possible sources of atmospheric fine particulates in rural areas of southern Jiangsu Province,samples of PM_2.5 were collected and analyzed in Xueyan Town and Taihu Lake Station over three seasons（summer,autumn,winter） from July 2002 to January 2003.The mass concentrations of PM_2.5 and 14 principal component elements were obtained.The results showed that pollution of PM_2.5 had been serious and the concentration level of S,Zn,Pb and As was similar to cities.There was different regional and seasonal distribution law of elements in PM_2.5,probably due to contribution of local sources and complicated meteorological condition.The result of principal components analysis showed that main sources of PM_2.5 included crustal re-suspension,coal burning,metal processing industry or waste incineration,and vehicular emission,which suggested that anthropogenic behavior was of important influence on PM_2.5 in rural areas of southern Jiangsu Province.更多还原