研究论文
陈宗良,张孟威,徐振全,朱天和,杨绍晋,钱琴芳,杨野男.北京大气颗粒有机物的污染水平及其源的识别[J].环境科学学报,1985,5(1):38-45
北京大气颗粒有机物的污染水平及其源的识别
- POLLUTING LEVELS AND IDENTIFICATION OF ITS SOURCES OF AIR PARTICULATE ORGANIC MATTER IN BEIJING
- 关键词：
- 基金项目：
- 作者
- 单位
- 陈宗良
- 中国科学院环境化学研究所
- 张孟威
- 中国科学院环境化学研究所
- 徐振全
- 中国科学院环境化学研究所
- 朱天和
- 中国科学院环境化学研究所
- 杨绍晋
- 中国科学院高能物理研究所
- 钱琴芳
- 中国科学院高能物理研究所
- 杨野男
- 中国科学院高能物理研究所
- 摘要：本文用大气颗粒物中13种元素(W、As、Br、K、Ba、Rb、Ce、Sc、Fe、Zn、Sb、Ni、V)和4种有机溶剂萃取物(NP环已烷萃取物、MP二氯甲烷萃取物、P丙酮萃取物、SP甲醇萃取物)的测定值作为变量,用富集因子法、因子分析法、多元回归法识别了北京地区主要污染源,并计算了它们对颗粒总有机物POM(NP+MP+P+SP)的贡献率.其贡献率:风砂土壤14.5％;煤炭燃烧20.3％;汽车燃油7.8％;二次污染32.5％;其它污染源24.9％.
- Abstract：Samples of suspended particulate matter were collected during the period of 26 Oct-4 Nov. 1982 and 27 Jan-2 Feb. 1983 in five sampling locations of Beijing. Non-polar, moderately polar, polar and strongly polar fractions of particulate organic matter POM were separated by 8h sequential Soxhlet extraction with cyclohexane, dichloromethane, acetone and methanol, respectively. Atmospheric concentrations of total POM were averaged at 111.7μg/m3 for non space heating periods and 129.7μg/m3 for space heating periods. Factor analysis was used in identifying emission sources of air pollutants. Four emission sources of air pollutants have been found in Beijing by this analysis. The regression model was formulated using multiple regression analysis, which is a statistical technioue for estimating the relative contribution of several sources of air pollutants to particulate organic matter POM. The model when applied to data from Beijing indicates that about 14.5% of POM is due to blown sand and soil, while motor vehicle and oil burning about 7.8%, coal burning about 20.3%, secondary pollution about 32.5% and other sources about 24.9%.
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