This study is focused on the investigations of bushfire-originated smoke particle released during different prescribed burning events conducted between May 2018 and August 2019 in Toohey forest region, Queensland, Australia. Particle size/mass distribution along with corresponding elemental content had been comprehensively measured and the results were compared against outcomes obtained during the combustion of similar vegetation under controlled laboratory conditions. It was found that the concentration of coarse particle with the sizes above 1 μm was higher during natural bushfire events, whereas the contributions of PM₁ was higher in the laboratory burns. Elemental analysis of different size fractions (<0.96 μm, 0.96–2.5 μm, and >2.5 μm) confirmed eight mutual elements determined for both cases (Na, K, Mg, Ca, Zn, Al, Fe, S), however, level of elements such as Ca, Mg, Al, and S were significantly higher in cases of prescribed fires. Such discrepancies between field and laboratory results could be attributed to the presence of soil and duff layers unavoidable in natural bushfires and absence thereof in the laboratory burns, which confirms substantial influence of such layers on the general air quality situation across bushfires affected regions.

这项研究的重点是调查在2018年5月至2019年8月之间在澳大利亚昆士兰州Toohey森林地区进行的不同规定燃烧事件期间释放的以大火引发的烟雾颗粒。已对颗粒大小/质量分布以及相应的元素含量进行了全面测量，并将结果与​​在受控实验室条件下燃烧相似植被的结果进行了比较。发现在自然林区大火期间，粒径大于1μm的粗颗粒浓度较高，而PM ₁的贡献较大。在实验室烧伤中较高。对不同尺寸分数（<0.96μm，0.96-2.5μm和> 2.5μm）的元素分析证实，两种情况（Na，K，Mg，Ca，Zn，Al，Fe，S）均确定了八个互元素在规定的火灾情况下，诸如Ca，Mg，Al和S等元素的含量明显更高。田野和实验室结果之间的这种差异可能归因于自然林区大火不可避免的土壤层和粉尘层的存在以及实验室燃烧中没有土壤层和达夫层，这证实了这些层对整个林区大火影响地区的总体空气质量状况具有重大影响。