Emission of Particulate Inorganic Substances from Prescribed Open Grassland Burning in Hirado, Akiyoshidai, and Aso, Japan

Air Pub Date : 2024-03-13 DOI:10.3390/air2010004
Satoshi Irei, Seiichiro Yonemura, Satoshi Kameyama, Asahi Sakuma, Hiroto Shimazaki
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Abstract

Biomass burning is one of the largest sources of particulate matter emissions globally. However, the emission of particulate inorganic species from prescribed grassland burning in Japan has not yet been characterized. In this study, we collected total suspended particulate matter from prescribed grassland burning in Hirado, Akiyoshidai, and Aso, Japan. The collected filter samples were brought to the laboratory, and water-soluble inorganic components were analyzed via ion chromatography. The measurement results showed high excess concentrations of potassium, calcium, and magnesium, and these substances were highly correlated, which agreed with previously reported findings. In contrast, the concentrations of sodium, chloride, nitrate, and sulfate were insignificant, even though their high concentrations were reported in other biomass burning studies. Among these low concentration substances, a high correlation was still observed between sulfate and nitrate. It is possible that the low concentrations of those species could have been biased in the measurements, particularly as a result of subtracting blank and background values from the observed concentrations. Building up more data in this area may allow us to characterize the significance of domestic biomass burning’s contribution to inorganic particulate components in Japanese air, which may consequently contributes to better understanding of adverse health effect of airborne particulate matter.
日本平户、秋吉台和阿苏的露天草地焚烧产生的无机物颗粒排放物
生物质燃烧是全球最大的颗粒物排放源之一。然而,日本草地焚烧产生的无机颗粒物的排放特征尚未确定。在这项研究中,我们收集了日本平户、秋吉台和阿苏的草地焚烧产生的总悬浮颗粒物。我们将收集到的过滤样本带到实验室,通过离子色谱法对水溶性无机成分进行了分析。测量结果表明,钾、钙和镁的浓度过高,而且这些物质的相关性很强,这与之前报道的结果一致。相比之下,钠、氯、硝酸盐和硫酸盐的浓度并不显著,尽管在其他生物质燃烧研究中也曾报道过它们的高浓度。在这些低浓度物质中,硫酸盐和硝酸盐之间仍然存在高度相关性。这些低浓度物质有可能在测量中出现偏差,特别是从观测浓度中减去空白值和背景值的结果。在这一领域积累更多的数据可以让我们确定家庭生物质燃烧对日本空气中无机微粒成分的重要影响,从而有助于更好地了解空气中微粒物质对健康的不良影响。
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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Air
Air
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