中文关键词呼包鄂地区污染特征正定矩阵因子分解模型(PMF)重污染过程PM_2.5 英文关键词Hohhot-Baotou-Ordos regionpollution characteristicspositive matrix factor(PMF)heavy pollution episodesPM_2.5

作者	单位	E-mail
李伊明	南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300071	yimingli@mail.nankai.edu.cn
刘佳媛	中国环境科学研究院大气环境科学研究所, 北京 100012
史国良	南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300071
皇甫延琦	南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300071
张昕	中国环境科学研究院国家环境保护生态工业重点实验室, 北京 100012	zhangxin@craes.org.cn
杨奕	中国环境科学研究院国家环境保护生态工业重点实验室, 北京 100012
冯银厂	南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300071

中文摘要 基于PMF模型源解析结果分析了呼包鄂地区冬季、夏季主要污染源及污染特征.物质重构结果表明，有机物（19.9%~44.6%）、地壳物质（9.7%~46.2%）在呼包鄂地区受体PM_2.5中占有较大比重.源解析结果表明，冬季各类源对PM_2.5的分担率大小依次为：二次源（26.7%） > 燃煤源（26.1%） > 机动车源（19.1%） > 扬尘源（18.1%），夏季则为二次源（26.7%） > 扬尘源（22.3%） > 燃煤源（16.6%） > 机动车源（15.1%） > SOC（8.7%），可以看出二次源在呼包鄂地区冬季和夏季均为首要贡献源类，冬季燃煤源、夏季扬尘源对呼包鄂地区的影响较大.分析冬季、夏季典型污染过程，对应于源解析结果，冬季主要污染源为二次源、燃煤源，夏季为二次源. 英文摘要 Based on the source apportionment by positive matrix factorization (PMF) model, we analyze the main sources and characteristics of aerosol fine particulate matter (PM_2.5) during winter and summer in the Hohhot-Baotou-Ordos region, China. We found that organic (19.9%-44.6%) and crustal compositions (9.7%-46.2%) accounted for a large proportion of aerosol PM_2.5 according to the results of mass closure. The results of source apportionment showed that the contribution of sources rank as:secondary inorganic aerosol (26.7%) > coal (26.1%) > motor vehicle (19.1%) > dust (18.1%) during winter, and as:secondary inorganic aerosol (26.7%) > dust (22.3%) > coal (16.6%) > vehicle exhaust (15.1%) > SOC (8.7%) during summer. Findings suggest that the contribution of sources with secondary inorganic aerosol were the largest sources both in winter and summer, and that the Hohhot-Baotou-Ordos region was also affected by coal during the winter and dust during the summer. Corresponding to the source apportionment, analysis of typical heavy pollution episodes in winter and summer showed that the pollution sources during the winter were mainly secondary inorganic aerosol and coal, whereas they were mainly secondary inorganic aerosol during the summer.

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