Source apportionment and a novel approach of estimating regional contributions to ambient PM2.5 in Haikou, China
Source apportionment and a novel approach of estimating regional contributions to ambient PM2.5 in Haikou, China
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中国海口市环境 PM2.5 的来源解析和区域贡献估算新方法
DOI：
10.1016/j.envpol.2017.01.030
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发表时间：
2017
影响因子：
8.9
通讯作者：
Yang Haihang
中科院分区：
文献类型：
--
作者：
Liu Baoshuang;Li Tingkun;Yang Jiamei;Wu Jianhui;Wang Jiao;Gao Jixin;Bi Xiaohui;Feng Yinchang;Zhang Yufen;Yang Haihang
提出了一种新的方法来估计区域贡献的环境PM2. 5在海口，中国。本文的研究分为两个主要步骤。第一步：分析了大气PM2.5的化学成分特征和源分布特征，并利用CMB和CMB迭代模型进行了源解析。第二步：根据海口市的地域特征和源解析结果，建立了区域贡献的估算方法，并利用该方法估算了海口市大气PM2.5的区域贡献。结果表明，二次硫酸盐、再悬浮尘和机动车尾气是海口市大气PM2.5的主要来源，贡献率分别为9.9- 21.4%、10.1-19.0%和10.5- 20.2%;海口市春、秋、冬季大气PM2.5的区域贡献率分别为22.5%、11.6%和32.5%。根据新估算方法较好的大气质量和假设条件，假定夏季区域贡献为零。冬季区域贡献率较高可能主要是由于来自中国大陆的污染空气输送，特别是来自冬季燃煤取暖的北方。
A novel approach was developed to estimate regional contributions to ambient PM2.5in Haikou, China. In this paper, the investigation was divided into two main steps. The first step: analysing the characteristics of the chemical compositions of ambient PM2.5, as well as the source profiles, and then conducting source apportionments by using the CMB and CMB-Iteration models. The second step: the development of estimation approaches for regional contributions in terms of local features of Haikou and the results of source apportionment, and estimating regional contributions to ambient PM2.5in Haikou by this new approach. The results indicate that secondary sulphate, resuspended dust and vehicle exhaust were the major sources of ambient PM2.5in Haikou, contributing 9.9–21.4%, 10.1–19.0% and 10.5–20.2%, respectively. Regional contributions to ambient PM2.5in Haikou in spring, autumn and winter were 22.5%, 11.6% and 32.5%, respectively. The regional contribution in summer was assumed to be zero according to the better atmospheric quality and assumptions of this new estimation approach. The higher regional contribution in winter might be mainly attributable to the transport of polluted air originating in mainland China, especially from the north, where coal is burned for heating in winter.