Institute of Chemistry, University of the Punjab, Lahore, 54590, Pakistan.
Institute for Chemical Technologies and Analytics, Vienna University of Technology, Vienna, Austria.
Environ Sci Pollut Res Int. 2020 Apr;27(12):14124-14137. doi: 10.1007/s11356-020-07905-2. Epub 2020 Feb 10.
The characterization of saccharidic compounds in atmospheric aerosols is important in order to retrieve information about organic carbon sources and their transport pathways through the atmosphere. In this study, composition and sources of saccharides in PM were determined in a South Asian megacity (Faisalabad) during the year 2015 - 2016. PM sampled on quartz filters was analyzed by anion exchange chromatography for the selected saccharidic compounds. The average PM concentration was found to be 744 ± 392 μg m, exceeding the daily limits proposed by Pak-EPA (150 μg m), US-EPA (150 μg m), and WHO (50 μg m). The average total saccharidic concentration was found to be 2820 ± 2247 ng m. Among the different saccharidic categories, anhydrosugars were the most abundant in concentration followed by primary sugars and sugar alcohols. The correlation and principal component analysis indicated emissions from biomass combustion, soil suspensions from areas such as farmlands having high microorganism activity, and biogenic emissions such as airborne fungal spores and vegetation detritus as major sources of saccharides in the aerosol samples.
为了获取有关有机碳源及其在大气中传输途径的信息，对大气气溶胶中的糖化合物进行特征描述非常重要。本研究于 2015 年至 2016 年在南亚特大城市费萨拉巴德（Faisalabad）测定了 PM 中糖的组成和来源。采用阴离子交换色谱法对石英滤膜上采集的 PM 进行了选定糖化合物的分析。结果发现，PM 的平均浓度为 744 ± 392 μg/m，超过了 Pak-EPA（150 μg/m）、US-EPA（150 μg/m）和世卫组织（50 μg/m）提出的日限值。平均总糖浓度为 2820 ± 2247 ng/m。在不同的糖类别中，无水糖的浓度最高，其次是单糖和糖醇。相关性和主成分分析表明，生物质燃烧排放、农田等微生物活动活跃地区的土壤悬浮物以及生物源排放（如气载真菌孢子和植被碎屑）是气溶胶样品中糖的主要来源。
