Exploring the potential for continuous measurement of ultrafine particle mass concentration (PM0.1) based on measurements of particle number concentration above 50 nm (N 50)

IF 2.8 4区环境科学与生态学 Q2 ENGINEERING, CHEMICAL Aerosol Science and Technology Pub Date : 2023-08-16 DOI:10.1080/02786826.2023.2249075

Georgia Argyropoulou, David Patoulias, S. Pandis

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Abstract

Abstract The real-time automatic and accurate measurement of the mass of ultrafine particles is especially challenging due to their low concentrations and the interferences of larger particles. This work introduces a new method to estimate PM0.1 continuously. Based on the theoretical predictions of a 3-D chemical transport model, PM0.1 and N 50 (number concentration of particles with a diameter above 50 nm) can have a very good correlation. This hypothesis is tested in this work by analyzing hourly measurements of size distributions, from different cities in Europe for a year. PM0.1 had a strong spatial and temporal correlation with N 50 (R 2 > 90%). The line passing through zero had an average slope of 0.16 ± 0.01 × 10−9 µg, for an assumed particle density equal to 1 g cm−3. This suggests that PM0.1 can be, at least in principle, measured indirectly but quite accurately and continuously by measuring N 50 with a suitable condensation particle counter. Copyright © 2023 American Association for Aerosol Research

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基于50以上粒子数浓度的测量，探索连续测量超细粒子质量浓度（PM0.1）的潜力纳米（N 50）

摘要由于超细颗粒的低浓度和较大颗粒的干扰，实时、自动、准确地测量超细颗粒的质量尤其具有挑战性。本文介绍了一种连续估算PM0.1的新方法。基于三维化学输运模型的理论预测，PM0.1和N50（直径大于50的颗粒的数量浓度 nm）可以具有非常好的相关性。这项工作通过分析欧洲不同城市一年来每小时的尺寸分布测量结果来检验这一假设。PM0.1与N 50具有较强的时空相关性（R2 > 90%）。通过零点的直线的平均斜率为0.16 ± 0.01 × 10−9 µg，假设颗粒密度等于1 g cm−3。这表明，至少在原则上，PM0.1可以通过用合适的冷凝颗粒计数器测量N50来间接但相当准确和连续地测量。版权所有©2023美国气溶胶研究协会

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来源期刊

Aerosol Science and Technology 环境科学-工程：化工

CiteScore

8.40

自引率

7.70%

发文量

审稿时长

3 months

期刊介绍： Aerosol Science and Technology publishes theoretical, numerical and experimental investigations papers that advance knowledge of aerosols and facilitate its application. Articles on either basic or applied work are suitable. Examples of topics include instrumentation for the measurement of aerosol physical, optical, chemical and biological properties; aerosol dynamics and transport phenomena; numerical modeling; charging; nucleation; nanoparticles and nanotechnology; lung deposition and health effects; filtration; and aerosol generation. Consistent with the criteria given above, papers that deal with the atmosphere, climate change, indoor and workplace environments, homeland security, pharmaceutical aerosols, combustion sources, aerosol synthesis reactors, and contamination control in semiconductor manufacturing will be considered. AST normally does not consider papers that describe routine measurements or models for aerosol air quality assessment.