A Novel Apportionment Method Utilizing Particle Mass Size Distribution across Multiple Particle Size Ranges

IF 2.5 4区地球科学 Q3 ENVIRONMENTAL SCIENCES

Atmosphere Pub Date : 2024-08-10 DOI:10.3390/atmos15080955

Peizhi Wang, Qingsong Wang, Yuhuan Jia, Jingjin Ma, Chunying Wang, Liping Qiao, Qingyan Fu, Abdelwahid Mellouki, Hui Chen, Li Li

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引用次数: 0

Abstract

Many cities in China are facing the dual challenge of PM2.5 and PM10 pollution. There is an urgent need to develop a cost-effective method that can apportion both with high-time resolution. A novel and practical apportionment method is presented in this study. It combines the measurement of particle mass size distribution (PMSD) with an optical particle counter (OPC) and the algorithm of normalized non-negative matrix factorization (N-NMF). Applied in the city center of Baoding, Hebei, this method separates four distinct pollution factors. Their sizes (ordered from the smallest to largest) range from 0.16 μm to 0.6 μm, 0.16 μm to 1.0 μm, 0.5 μm to 17.0 μm, and 2.0 μm to 20.0 μm, respectively. They correspondingly contribute to PM2.5 (PM10) with portions of 26% (17%), 37% (26%), 33% (41%), and 4% (16%), respectively, on average. The smaller three factors are identified as combustion, secondary, and industrial aerosols because of their high correlation with carbonaceous aerosols, nitrate aerosols, and trace elements of Fe/Mn/Ca in PM2.5, respectively. The largest-sized factor is linked to dust aerosols. The primary origin regions, oxidation degrees, and formation mechanisms of each source are further discussed. This provides a scientific basis for the comprehensive management of PM2.5 and PM10 pollution.

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利用多个粒径范围内的颗粒质量粒径分布的新型分摊方法

中国的许多城市都面临着 PM2.5 和 PM10 污染的双重挑战。迫切需要开发一种经济有效的方法，以高时间分辨率来分摊这两种污染。本研究提出了一种新颖实用的分摊方法。它将颗粒物质量粒径分布（PMSD）测量与光学颗粒物计数器（OPC）和归一化非负矩阵因式分解（N-NMF）算法相结合。该方法应用于河北保定市中心，可分离出四种不同的污染因子。它们的大小（从小到大）分别为 0.16 μm 至 0.6 μm、0.16 μm 至 1.0 μm、0.5 μm 至 17.0 μm，以及 2.0 μm 至 20.0 μm。相应地，它们对 PM2.5（PM10）的贡献率平均分别为 26%（17%）、37%（26%）、33%（41%）和 4%（16%）。较小的三个因子被确定为燃烧、二次气溶胶和工业气溶胶，因为它们分别与 PM2.5 中的碳质气溶胶、硝酸盐气溶胶和微量元素铁/锰/钙高度相关。最大的因素与尘埃气溶胶有关。进一步讨论了每个来源的主要起源区域、氧化程度和形成机制。这为 PM2.5 和 PM10 污染的综合治理提供了科学依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Atmosphere METEOROLOGY & ATMOSPHERIC SCIENCES-

CiteScore

4.60

自引率

13.80%

发文量

1769

审稿时长

1 months

期刊介绍： Atmosphere (ISSN 2073-4433) is an international and cross-disciplinary scholarly journal of scientific studies related to the atmosphere. It publishes reviews, regular research papers, communications and short notes, and there is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles.