大气中活性氮的转化引发了对 PM2.5-O3 污染的同向和反向效应。

Journal of hazardous materials Pub Date : 2024-10-05 Epub Date: 2024-08-16 DOI:10.1016/j.jhazmat.2024.135558
Feng Wang, Chun Zhang, Yi Ge, Ruiling Zhang, Bijie Huang, Guoliang Shi, Xiaoli Wang, Yinchang Feng
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引用次数: 0

摘要

作为两种重要的环境空气污染物,颗粒物(PM2.5)和臭氧(O3)都可能来源于气体氮氧化物。本研究应用理论分析和机器学习方法,研究了大气活性氮对 PM2.5-O3 污染的影响,其中一氧化氮(NO)、二氧化氮(NO2)、气态硝酸(HNO3)和颗粒硝酸盐(pNO3-)的转化过程对 PM2.5-O3 污染具有同向和反向影响。其中,HNO3 和 SO2 是共向驱动因素,导致 PM2.5 和 O3 同时增长或减少;而 NO、NO2 和温度则代表反向因素,它们会促进一种污染物的增长,同时减少另一种污染物。我们的研究结果表明,为实现 PM2.5-O3 可持续减排而设计合适的协同控制策略时,应针对驱动因素,在合适的敏感区域内考虑反向和同向效应。对于同向驱动因素,设计合适的减缓策略将共同实现PM2.5和O3的有效减排;而对于反向驱动因素,则需要更多耐心,否则有可能在减少一项的同时增加另一项。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Atmospheric reactive nitrogen conversion kicks off the co-directional and contra-directional effects on PM2.5-O3 pollution.

As the two important ambient air pollutants, particulate matter (PM2.5) and ozone (O3) can both originate from gas nitrogen oxides. In this study, applied by theoretical analysis and machine learning method, we examined the effects of atmospheric reactive nitrogen on PM2.5-O3 pollution, in which nitric oxide (NO), nitrogen dioxide (NO2), gaseous nitric acid (HNO3) and particle nitrate (pNO3-) conversion process has the co-directional and contra-directional effects on PM2.5-O3 pollution. Of which, HNO3 and SO2 are the co-directional driving factors resulting in PM2.5 and O3 growing or decreasing simultaneously; while NO, NO2, and temperature represent the contra-directional factors, which can promote the growth of one pollutant and reduce another one. Our findings suggest that designing the suitable co-controlling strategies for PM2.5-O3 sustainable reduction should target at driving factors by considering the contra-directional and co-directional effects under suitable sensitivity regions. For co-directional driving factors, the design of suitable mitigation strategies will jointly achieve effective reduction in PM2.5 and O3; while for contra-directional driving factors, it should be more patient, otherwise, it is possible to reduce one item but increase another one at the same time.

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