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    魏巧珍, 王宇红, 李盛, 罗斌, 贾清, 余加琳, 赵红, 原晓蓉, 牛静萍. 基于PCA-MLR模型的兰州市大气PM2.5污染来源解析[J]. 环境卫生学杂志, 2017, 7(4): 267-273. DOI: 10.13421/j.cnki.hjwsxzz.2017.04.003
    引用本文: 魏巧珍, 王宇红, 李盛, 罗斌, 贾清, 余加琳, 赵红, 原晓蓉, 牛静萍. 基于PCA-MLR模型的兰州市大气PM2.5污染来源解析[J]. 环境卫生学杂志, 2017, 7(4): 267-273. DOI: 10.13421/j.cnki.hjwsxzz.2017.04.003
    shu
    WEI Qiaozhen, WANG Yuhong, LI Sheng, LUO Bin, JIA Qing, YU Jialin, ZHAO Hong, YUAN Xiaorong, NIU Jingping. The Source Apportionment of PM2.5 Based on PCA-MLR Model in Lanzhou City[J]. Journal of Environmental Hygiene, 2017, 7(4): 267-273. DOI: 10.13421/j.cnki.hjwsxzz.2017.04.003
    Citation: WEI Qiaozhen, WANG Yuhong, LI Sheng, LUO Bin, JIA Qing, YU Jialin, ZHAO Hong, YUAN Xiaorong, NIU Jingping. The Source Apportionment of PM2.5 Based on PCA-MLR Model in Lanzhou City[J]. Journal of Environmental Hygiene, 2017, 7(4): 267-273. DOI: 10.13421/j.cnki.hjwsxzz.2017.04.003
    shu

    基于PCA-MLR模型的兰州市大气PM2.5污染来源解析

    The Source Apportionment of PM2.5 Based on PCA-MLR Model in Lanzhou City

      摘要
    • 摘要:
      目的 了解兰州市不同功能区大气PM2.5的污染来源及贡献率。
      方法 选取兰州市经济中心城关区和核心工业区西固区进行PM2.5样品采集，采用电感耦合等离子体质谱法、离子色谱法、高效液相色谱法分别检测PM2.5中的金属元素、水溶性离子及PAHs浓度，结合PCA-MLR模型探讨其来源及贡献率。
      结果 两区均以燃煤/交通混合污染源对PM2.5浓度的贡献最大。城关区的主要污染源为燃煤/交通混合污染源、土壤扬尘及生物质燃烧源，其贡献率分别为52%、35%、13%；西固区除燃煤/交通混合污染源（38%）、土壤扬尘（24%）占较大部分外，工业污染源、工业/燃煤混合污染源及二次污染源也占有一定的比例（38%）。
      结论 兰州市城关区和西固区PM2.5的最大污染来源均为燃煤/交通混合污染源。

       

      Abstract:
      Objective To understand the pollution sources and source contribution rates of atmospheric PM2.5 in different functional areas of Lanzhou City.
      Methods Detecting the concentrations of metal elements, water-soluble ions and PAHs in PM2.5 samples collected in Chengguan and Xigu district by inductively coupled plasma mass spectrometry, ion chromatography and high performance liquid chromatography respectively.The PCA-MLR model was used to investigate the pollution source and it's contribution.
      Results The largest contribution to PM2.5 was mixed pollution source of coal combustion and traffic emission in both districts.In Chengguan district, the major pollution sources were coal combustion and traffic emission, soil dusts, and biomass burning, with average contributions of 52%, 35% and 13% respectively.While in Xigu district, except the large parts of coal combustion/traffic emission (38%) and soil dusts (24%), the pollution from industrial production, coal combustion and secondary reaction also accounted for a certain proportion (38%) in total pollution sources.
      Conclusion The largest contribution to PM2.5 was mixed pollution source of coal combustion and traffic emission in Chengguan and Xigu districts of Lanzhou city.

       

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