Suspension of Crustal Materials from Wildfire in Indonesia as Revealed by Pb Isotope Analysi
Suspension of Crustal Materials from Wildfire in Indonesia as Revealed by Pb Isotope Analysi
复制标题
铅同位素分析显示印度尼西亚野火造成的地壳物质悬浮
DOI：
10.1021/acsearthspacechem.2c00270
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发表时间：
2023
影响因子：
3.4
通讯作者：
and Mikinori Kuwata
中科院分区：
文献类型：
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作者：
Reshmi Das;Xianfeng Wang;Bahareh Khezri;Richard D. Webster;Masatuki Itoh;Satomi Shiodera;Ahmad Taufiq Bin Mohamed Mohtar;and Mikinori Kuwata
东南亚经历了反复发生的野火事件。这些野火产生的气溶胶颗粒包括金属物种，它们被认为对环境和气候有关键影响。然而，该地区野火排放这些元素的机制尚不清楚。我们分析了铅的元素组成和同位素比值，铅是一种重要的环境元素。我们的样本是2013年在新加坡采集的总悬浮颗粒物(TSP)，特别是6月份的野火雾霾期间。还分析了该地区野火燃料和地壳物质的铅同位素比值。灰霾期间的铅同位素比值(208Pb/207Pb=2.448±0.013和206Pb/207Pb=1.169±0.012)与非灰霾时期的(208Pb/207Pb=2.438±0.006、206Pb/207Pb=1.159±0.005)有显著差异。这一差异表明，地壳物质的悬浮是TSP的主要排放源。元素组成(Al/Pb)与该地区以前的研究(主要以PM2.5为样本)的比较表明，该地区野火颗粒物的排放机制可能与尺寸有关。我们建议将结壳土壤物质的悬浮物纳入未来野火排放清单。
Southeast Asia experiences recurring wildfire events. Aerosol particles from these wildfires include metal species, which are suggested to have critical influences on the environment and climate. However, the mechanisms for emission of these elements from the wildfires in the region remains unclear. We analyzed both the elemental composition and the isotope ratios of lead (Pb), which is an environmentally important element. Our samples were collected in Singapore as the total suspended particulate (TSP) matter during 2013, especially focusing on the wildfire haze period in June. The Pb isotope ratios for wildfire fuels as well as crustal materials in the region were also analyzed. The Pb isotopic ratios during the haze period (208Pb/207Pb = 2.448 ± 0.013 and206Pb/207Pb = 1.169 ± 0.012) were significantly (p< 0.05) different from those of the non-haze period (208Pb/207Pb = 2.438 ± 0.006,206Pb/207Pb = 1.159 ± 0.005). This difference demonstrates that the suspension of the crustal material is the dominant emission source of TSP. Comparison of elemental composition (Al/Pb) with previous studies in the region, which have dominantly been sampled as PM2.5, suggests that the emission mechanism of particulate matter from wildfire in the region is likely size-dependent. We suggest that the suspension of crustal soil material needs to be included in future emission inventory for wildfire emission.