Comparison of air pollutants and their health effects in two developed regions in China during the COVID-19 pandemic.
Comparison of air pollutants and their health effects in two developed regions in China during the COVID-19 pandemic.
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COVID-19大流行期间中国两个发达地区的空气污染物及其健康影响比较
DOI：
10.1016/j.jenvman.2021.112296
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发表时间：
2021-06-01
影响因子：
8.7
通讯作者：
Chen M
中科院分区：
文献类型：
--
作者：
Wang J;Lei Y;Chen Y;Wu Y;Ge X;Shen F;Zhang J;Ye J;Nie D;Zhao X;Chen M
在中国，特别是京津冀和长三角地区，由于大量的人为排放和显著的二次形成过程而造成的空气污染已被频繁报道。为了研究2020年新型冠状病毒(新冠肺炎)封锁期前、中、后的气溶胶演变过程，分析了2020年1月1日至4月11日的6种空气污染物的环境监测数据。我们的结果表明，由于人为排放的大幅减少，新冠肺炎封锁期间环境中六种污染物的浓度都要低得多。与YRD相比，BTH受空气污染的影响更严重，这表明这两个地区的产业结构存在差异。新冠肺炎封锁期间CO和NO2归一化比值的显著差异，以及PM2.5的增加，表明NO2氧化生成硝酸盐，二次过程对PM2.5的贡献占主导地位。此外，2020年长三角新冠肺炎大流行期间，健康风险最大的因素是PM2.5，基于健康风险的空气质量指数(HAQI)值均低于2019年。我们的研究结果表明，减少人为排放是缓解PM2.5污染的关键，而臭氧控制可能更复杂。
Air pollution attributed to substantial anthropogenic emissions and significant secondary formation processes have been reported frequently in China, especially in Beijing-Tianjin-Hebei (BTH) and Yangtze River Delta (YRD). In order to investigate the aerosol evolution processes before, in, and after the novel coronavirus (COVID-19) lockdown period of 2020, ambient monitoring data of six air pollutants were analyzed from Jan 1 to Apr 11 in both 2020 and 2019. Our results showed that the six ambient pollutants concentrations were much lower during the COVID-19 lockdown due to a great reduction of anthropogenic emissions. BTH suffered from air pollution more seriously in comparison of YRD, suggesting the differences in the industrial structures of these two regions. The significant difference between the normalized ratios of CO and NO2 during COVID-19 lockdown, along with the increasing PM2.5, indicated the oxidation of NO2 to form nitrate and the dominant contribution of secondary processes on PM2.5. In addition, the most health risk factor was PM2.5 and health-risked based air quality index (HAQI) values during the COVID-19 pandemic in YRD in 2020 were all lower than those in 2019. Our findings suggest that the reduction of anthropogenic emissions is essential to mitigate PM2.5 pollution, while O3 control may be more complicated.
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影响因子：
13.6
作者：
Li W;Xu L;Liu X;Zhang J;Lin Y;Yao X;Gao H;Zhang D;Chen J;Wang W;Harrison RM;Zhang X;Shao L;Fu P;Nenes A;Shi Z
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