Seasonal variation and size distribution of inorganic and carbonaceous components, source identification of size-fractioned urban air particles in Kuala Lumpur, Malaysia.
Seasonal variation and size distribution of inorganic and carbonaceous components, source identification of size-fractioned urban air particles in Kuala Lumpur, Malaysia.
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DOI：
10.1016/j.chemosphere.2021.132309
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发表时间：
2021-09
期刊：
影响因子：
8.8
通讯作者：
Anas Ahmad Jamhari;Mohd Talib Latif;M. I. A. Wahab;Hanashriah Hassan;M. Othman;Haris Hafizal Abd Hamid;P. Tekasakul;W. Phairuang;M. Hata;Masami Furuchi;N. Rajab
中科院分区：
文献类型：
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作者：
Anas Ahmad Jamhari;Mohd Talib Latif;M. I. A. Wahab;Hanashriah Hassan;M. Othman;Haris Hafizal Abd Hamid;P. Tekasakul;W. Phairuang;M. Hata;Masami Furuchi;N. Rajab
本研究旨在根据吉隆坡城市空气颗粒的季节变化和大小分布确定无机和碳成分。从2017年2月17日至2017年11月27日，使用纳米采样器测量了不同组分的颗粒物（PM）。采用离子色谱法和碳分析仪热/光学反射法分别分析了所有样品中的水溶性无机离子（WSIIs）和碳质组分。总PM浓度在西南季节达到峰值（70.99±6.04 μg/m3）， pm0.5 ~ 1.0（22% ~ 30%, 9.55±1.03 μg/m3）和pm2.5 ~ 10（22% ~ 25%, 10.34±0.81 μg/m3）累积量最大。SO42−、NO3−和NH4+是WSIIs的主要贡献者，它们的形成主要发生在西南季节（占总离子的80.5%）。pm0.5 ~ 1.0和pm2.5 ~ 10的WSII粒径分布比例最高，分别占总质量的28.4%和13.5%。碳质物种（OC + EC）对总碳质浓度的平均贡献在pm2.5 ~ 1.0和pm2.5 ~ 10中较高（分别为35.2%和26.6%）。超细颗粒物（PM<0.1）一致表明污染源为机动车排放，西南季节污染源持续以生物质燃烧为主。利用正矩阵分解（PMF）模型，二次无机气溶胶和生物质燃烧（30.3%）被认为是总PM的重要来源。结果表明，生物质燃烧、二次无机气溶胶和机动车的混合作用对城市大气颗粒物的粒径分离和无机、碳组分的季节变化有重要影响。
This study aims to determine the inorganic and carbonaceous components depending on the seasonal variation and size distribution of urban air particles in Kuala Lumpur. Different fractions of particulate matter (PM) were measured using a Nanosampler from 17 February 2017 until 27 November 2017. The water-soluble inorganic ions (WSIIs) and carbonaceous components in all samples were analysed using ion chromatography and carbon analyser thermal/optical reflectance, respectively. Total PM concentration reached its peak during the southwest (SW) season (70.99 ± 6.04 μg/m3), and the greatest accumulation were observed at PM0.5–1.0(22%–30%, 9.55 ± 1.03 μg/m3) and PM2.5–10(22%–25%, 10.34 ± 0.81 μg/m3). SO42−, NO3−and NH4+were major contributors of WSIIs, and their formation was favoured mainly during SW season (80.5% of total ions). PM0.5–1.0and PM2.5–10exhibited the highest percentage of WSII size distribution, accounted for 28.4% and 13.5% of the total mass, respectively. The average contribution of carbonaceous species (OC + EC) to total carbonaceous concentrations were higher in PM0.5–1.0(35.2%) and PM2.5–10(26.6%). Ultrafine particles (PM<0.1) consistently indicated that the sources were from vehicle emission while the SW season was constantly dominated by biomass burning sources. Using the positive matrix factorization (PMF) model, secondary inorganic aerosol and biomass burning (30.3%) was known as a significant source of overall PM. As a conclusion, ratio and source apportionment indicate the mixture of biomass burning, secondary inorganic aerosols and motor vehicle contributed to the size-segregated PM and seasonal variation of inorganic and carbonaceous components of urban air particles.