Impact of emission control on PM2.5 and the chemical composition change in Beijing-Tianjin-Hebei during the APEC summit 2014
Impact of emission control on PM2.5 and the chemical composition change in Beijing-Tianjin-Hebei during the APEC summit 2014
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DOI：
10.1007/s11356-015-5379-5
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发表时间：
2016-03
影响因子：
5.8
通讯作者：
W. Wen;Shuiyuan Cheng;Xufeng Chen;Gang Wang;Song Li;Xiaoqi Wang;Xiaoyu Liu
中科院分区：
文献类型：
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作者：
W. Wen;Shuiyuan Cheng;Xufeng Chen;Gang Wang;Song Li;Xiaoqi Wang;Xiaoyu Liu
当局在2014年亚太经合组织峰会上所采取的减排措施的成功证明，京津冀的空气质量可以通过引入一体化减排措施来改善。本文结合减排措施实施前、实施中和实施后的观测数据、减排措施和空气质量模拟，分析了区域内污染物化学成分的变化以及排放与浓度的关系。于2014年10月20日至11月25日在北京、石家庄和唐山采集了24 h PM2. 5样品。测量了总PM2.5质量。PM2.5样品用于分析无机元素，选择离子，有机碳（OC）和元素碳（EC）。排放控制期间PM2.5浓度降低。北京、石家庄和唐山的PM2.5总浓度与非排放控制期间相比分别下降了54%、26%和39%。北京、石家庄和唐山的平均元素浓度分别降低了75%、37%和36%。亚太经合组织会议后，平均元素浓度增加。在这两个城市，浓度二次水溶性离子，初级碳和元素碳减少。但由于光化学氧化剂的变化，北京大气中次生碳的浓度有所增加。为继续改善空气质量，需要对区域排放进行更严格的控制，以大幅减少该区域的细颗粒物污染。
The success of the emission reduction measures undertaken by authorities in the Asia-Pacific Economic Cooperation summit 2014 demonstrated that the Beijing-Tianjin-Hebei air quality can be improved by introducing integrated emission reduction measures. This paper combines observation data, emission reduction measures, and air quality simulations that were applied before, during, and after the emission control measure implement to analyze the chemical composition change and relationship between emissions and concentrations of pollutants in region. The 24-h PM2.5samples were collected in the city Beijing, Shijiazhuang, and Tangshan during the period of 20 October to 25 November, 2014. The total PM2.5mass was measured. PM2.5samples were used for the analysis of inorganic elements, selected ions, and organic carbon (OC) and element carbon (EC). PM2.5concentrations during the emission control period were decreased. Total PM2.5concentrations were reduced by 54, 26, and 39 % when compared to non-emission control period in Beijing, Shijiazhuang, and Tangshan. The average element concentrations were reduced significantly by 75 % in Beijing, 37 % in Shijiazhuang, and 36 % in Tangshan. After the Asia-Pacific Economic Cooperation (APEC) conference, the average element concentration increased. At both cities, the concentration secondary water-soluble ions, primary carbon, and element carbon were reduced. However, the concentration of secondary carbon species increased in Beijing due to photochemical oxidants change. More stringent control of regional emissions will be needed for significant reductions of fine particulate pollution in the region to continue to improve air quality.