上海大气细颗粒物(PM2.5)化学元素及其源解析

Lu Senlin, C. Xiaohui, Wu Minghong, Yao Zhenkun, Jiao Zheng, S. Guoying, Fu Jiamo
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引用次数: 4

摘要

2005年4月至2006年3月在上海市区和郊区收集PM2.5。采用电感耦合等离子体原子发射光谱(ICP-AES)研究了上海PM2.5样品和可溶组分中K、Na、Ca、Mg、As、Cu、Zn、Pb、Cd、Cr、Al、Fe、Mn、Ba、Sr、Ni、Se等17种元素的质量浓度。结果表明:从夏季到冬季,上海PM2.5中总元素逐渐增加,春季保持较高水平;PM2.5中不同元素的质量剂量存在显著差异。富集因子(EF)分析结果表明,K、Na、Ca、Mg、AK、Fe、Ba、Sr来源于自然资源,而As、Cu、Zn、Pb、Cd、Mn、M、Se来源于人为资源。旋转成分矩阵研究证实了Ca、Fe、Mn、Ba元素之间存在很强的联系,表明这些元素来源于地壳资源。人为污染元素Zn和Pb关系密切,表明它们具有相同的资源。就像上海的PM2.5可能只有一个来源一样,还需要进一步研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Chemical Elements and their Source Apportionment of Fine Particulates (PM2.5) in Shanghai Atmosphere
PM2.5 was collected at Shanghai urban and suburban sites from April 2005 to March 2006. ICP-AES (inductively coupled plasma-atomic emission spectrum) was used to investigate mass concentration of 17 elements (K, Na, Ca, Mg , As, Cu, Zn, Pb, Cd, Cr, Al, Fe, Mn, Ba, Sr, Ni, Se) in whole sample and soluble fraction of Shanghai PM2.5. Our results claimed total elements in Shanghai PM2.5 increased gradually from summer to winter and kept in a relative higher level in spring. Mass dosage of different elements in PM2.5 had a significant difference. Enrichment factor (EF) analysis results demonstrated that K, Na, Ca, Mg, AK Fe, Ba, Sr originated from natural resources, while As, Cu, Zn, Pb, Cd , Mn, M, Se emitted by anthropogenic resources. Rotated Component Matrix study testified that there exists a strong relationship among Ca, Fe, Mn, Ba, suggesting these elements originated from crustal resources. Anthropogenic polluted elements, such as Zn and Pb have a close relationship, indicating they have the same resource. As in Shanghai PM2.5 might have one single resource, it needs further study.
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