Characteristics of fine dust pollution PM₂.₅ in Hanoi in 2021

Nuclear Science and Technology Pub Date : 2024-06-03 DOI:10.53747/nst.v13i4.450

Thu Bac Vuong, Lan Anh Ha, Dinh Kien Mai, Huyen Trang Nguyen

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Abstract

Fine particulate matter (PM2.5) is one of the most dangerous pollutions in the atmosphere in the Hanoi capital. PM2.5 fine dust pollution characteristics in Hanoi in the duration from 5/2021 to 3/2022 have been studied. The concentration of main chemical elements (such as As, Br, Ca, Cd, Ce, Cl, Cu, Fe, K, Mn, Pb, S, Sr, Ti, Zn, Zr…), main water-soluble ions (such as Na+, NH4+, K+, Mg2+, Ca2+, SO42-, Cl-, NO3-, F-, NO2-) and black carbon (BC) in the PM2.5 sample have been analyzed. The average PM2.5 fine dust concentration was (78.09 ± 51.71) µg/m3 and ranged from 17.55 to 271.39 µg/m3. PM2.5 tends to increase and is about 3.12 times larger than Who Air Quality Guidelines 2005 (25 µg/m3 for PM2.5 24h). The average PM2.5 concentration in the rainy season from 5/2021 to 9/2021 was (51.97 ± 16.40) µg/m3. This value for the dry season from 10/2021 to 3/2022 was (104.70 ± 61.19) µg/m3. It is much higher than that in the rainy season about 2.01 times. The major contributors were the secondary components such as NH4+, SO42-, NO3- and BC... The main pollution contribution sources and the potential pollution areas map have been identified. This research shows a worrying picture of fine dust PM2.5 in Hanoi in the studying duration.

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2021 年河内微尘污染 PM₂.₅ 的特征

细颗粒物（PM2.5）是河内首都大气中最危险的污染之一。我们对 2021 年 5 月至 2022 年 3 月期间河内的 PM2.5 微尘污染特征进行了研究。分析了 PM2.5 样品中主要化学元素（如 As、Br、Ca、Cd、Ce、Cl、Cu、Fe、K、Mn、Pb、S、Sr、Ti、Zn、Zr......）、主要水溶性离子（如 Na+、NH4+、K+、Mg2+、Ca2+、SO42-、Cl-、NO3-、F-、NO2-）和黑碳（BC）的浓度。PM2.5 微尘的平均浓度为（78.09 ± 51.71）微克/立方米，范围在 17.55 至 271.39 微克/立方米之间。PM2.5 有增加的趋势，是《2005 年空气质量指南》（PM2.5 24 小时浓度为 25 微克/立方米）的 3.12 倍。2021 年 5 月至 9 月雨季的 PM2.5 平均浓度为（51.97 ± 16.40）微克/立方米。2021 年 10 月至 2022 年 3 月旱季的这一数值为（104.70 ± 61.19）微克/立方米。比雨季的数值高出约 2.01 倍。主要污染源是 NH4+、SO42-、NO3- 和 BC 等二次成分。主要污染贡献源和潜在污染区域图已经确定。这项研究表明，研究期间河内的微尘 PM2.5 状况令人担忧。

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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Nuclear Science and Technology

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