Characteristics of PM2.5 Pollution in Osorno, Chile: Ion Chromatography and Meteorological Data Analyses
Characteristics of PM2.5 Pollution in Osorno, Chile: Ion Chromatography and Meteorological Data Analyses
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DOI：
10.3390/atmos13020168
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发表时间：
2022-01
期刊：
影响因子：
2.9
通讯作者：
Ayane Nakamura;N. Nakatani;F. Maruyama;S. Fujiyoshi;Rodrigo Márquez-Reyes;Ricardo Fernández;J. Noda
中科院分区：
文献类型：
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作者：
Ayane Nakamura;N. Nakatani;F. Maruyama;S. Fujiyoshi;Rodrigo Márquez-Reyes;Ricardo Fernández;J. Noda
几十年来，空气污染已成为智利奥索尔诺的一个严重问题。本研究旨在通过综合分析PM2.5的化学成分并与气象条件进行比较，明确PM2.5的来源。 PM2.5 和过滤器样本是在 2019 年 4 月至 2019 年 8 月期间使用连续颗粒物监测仪收集的。使用 Image J 软件、离子色谱法和后向轨迹进行分析。比较离子成分和PM2.5。 PM2.5 和钾 (K+) 浓度的结果显示相关系数为 0.93，表明生物质燃烧（例如木材燃烧）是奥索尔诺 PM2.5 的主要来源。在低温、低降水和低风速时期，PM2.5 浓度高达 170 至 1124 µg/m3，气象条件促进了逆温层的形成。此外，检测到的海水中常见离子之间的相关性为 0.61 至 0.67。向后轨迹分析显示主要气团输送来自南太平洋，这表明检测到的部分 PM2.5 来自海洋环境。以木材燃烧活动为重点的持续监测和缓解策略对于缓解奥索尔诺市当前的空气污染问题是必要的。
Over the decades, air pollution has become a serious problem in Osorno, Chile. This study aims to clarify the source of PM2.5 by comprehensively analyzing its chemical composition and comparing it with meteorological conditions. The PM2.5 and filter samples were collected during April 2019–August 2019 using a continuous particulate monitor. The analyses were conducted using Image J software, ion chromatography, and backward trajectory. The ion composition and the PM2.5 were compared. The results on the PM2.5 and potassium (K+) concentrations indicated a correlation factor of 0.93, indicating that biomass combustion, such as wood burning, is the dominant source of PM2.5 in Osorno. High PM2.5 concentrations of over 170 to 1124 µg/m3 were observed in low temperature, low precipitation, and low wind speed periods—meteorological conditions contributed to the development of a thermal inversion layer. In addition, correlations of 0.61 to 0.67 were found among the detected ions that are often found in seawater. The backward trajectory analyses showed dominant air mass transport from the South Pacific Ocean, suggesting that part of the detected PM2.5 was derived from the marine environment. Continuous monitoring and mitigation strategies focusing on wood combustion activities are necessary to alleviate the current air pollution problem in Osorno city.