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观测泰国农林复合区热带稀树草原气候下含有氯的超粗碳质气溶胶颗粒。

Observing super-coarse carbonaceous aerosol particles containing chloride in a tropical savanna climate at an agro-forest site in Thailand.

机构信息

Environmental Engineering and Disaster Management Program, School of Interdisciplinary Studies, Mahidol University Kanchanaburi Campus, 199 Moo 9, Lumsum Sub-District, Saiyok District, Kanchanaburi, 71150, Thailand.

Mahidol-York Interdisciplinary Living Research Excellence Center, Mahidol University Kanchanaburi Campus, 199 Moo 9, Lumsum Sub-District, Saiyok District, Kanchanaburi, 71150, Thailand.

出版信息

Environ Sci Pollut Res Int. 2024 Nov;31(55):63718-63733. doi: 10.1007/s11356-024-35486-x. Epub 2024 Nov 6.

DOI:10.1007/s11356-024-35486-x
PMID:39500791
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11602828/
Abstract

Coarse aerosol particles containing chloride in tropical forests are significant for understanding biogeochemical cycles and atmospheric processes, with implications for environmental health and climate change mitigation. This study explored the sources of super-coarse carbonaceous aerosol particles containing chloride in a tropical savanna climate. Aerosol samples were collected from an agro-forest site in Thailand during the dry season and analyzed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Fourier-transform infrared (FTIR) spectroscopy. By examining the morphology and elemental compositions of individual aerosol particles, along with employing Positive Matrix Factorization (PMF) and backward trajectory analysis, potential sources were identified. The findings revealed two primary sources for the super-coarse aerosol particles: a mixture of biomass burning smoke and inorganic salts (likely from saline soil and sea salt), as well as halophilic fungal spores. FTIR analysis indicated the presence of compounds linked to biomass burning and clay minerals, influenced by prevailing northeast and southeast winds. Recommendations for future research include continued monitoring, correlation with meteorological parameters, and the application of transmission electron microscopy (TEM) for more detailed visualization and confirmation of aerosol sources.

摘要

含氯的粗气溶胶颗粒在热带森林中对于理解生物地球化学循环和大气过程具有重要意义，这对环境健康和气候变化缓解都有影响。本研究探讨了热带稀树草原气候中超粗含氯碳质气溶胶颗粒的来源。在旱季，从泰国的一个农林复合地采集了气溶胶样本，并使用扫描电子显微镜（SEM）、能谱（EDS）和傅里叶变换红外（FTIR）光谱进行了分析。通过检查单个气溶胶颗粒的形态和元素组成，并采用正定矩阵因子分解（PMF）和后向轨迹分析，确定了潜在的来源。研究结果表明，超粗气溶胶颗粒有两个主要来源：生物质燃烧烟雾和无机盐（可能来自盐土和海盐）的混合物，以及嗜盐真菌孢子。FTIR 分析表明，存在与生物质燃烧和粘土矿物有关的化合物，这受东北风和东南风的影响。未来研究的建议包括继续监测、与气象参数的相关性以及使用透射电子显微镜（TEM）进行更详细的可视化和气溶胶源的确认。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/d87a4fcc4387/11356_2024_35486_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/28aa64ee8de3/11356_2024_35486_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/9fb64ee55d4d/11356_2024_35486_Fig5_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/45bc0e38a88e/11356_2024_35486_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/d87a4fcc4387/11356_2024_35486_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/28aa64ee8de3/11356_2024_35486_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/96b640ce10fb/11356_2024_35486_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/faa4867e2de7/11356_2024_35486_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/b0d8e40e4288/11356_2024_35486_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/9fb64ee55d4d/11356_2024_35486_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/279572882d10/11356_2024_35486_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/45bc0e38a88e/11356_2024_35486_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4341/11602828/d87a4fcc4387/11356_2024_35486_Fig8_HTML.jpg

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