PAHs emissions from residential biomass burning in real-world cooking stoves in rural China

被引：0

作者：

Du, Wei ^{[1
,2
]}

Yun, Xiao ^{[2
]}

Chen, Yuanchen ^{[3
]}

Zhong, Qirui ^{[2
]}

Wang, Wei ^{[2
]}

Wang, Lizhi ^{[2
]}

Qi, Meng ^{[2
]}

Shen, Guofeng ^{[2
]}

Tao, Shu ^{[2
]}

机构：

[1] Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai,200241, China

[2] Laboratory of Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing,100871, China

[3] College of Environment, Research Centre of Environmental Science, Zhejiang University of Technology, Hangzhou,310032, China

来源：

Environmental Pollution | 2020年 / 267卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Organic carbon - Waste incineration - Gas emissions - Fuels - Agricultural wastes - Biomass - Stoves - Uncertainty analysis;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Indoor biomass burning is a major contributor to the emission of PAHs (polycyclic aromatic hydrocarbons) in China. To date, estimates of PAH emissions from the burning of biomass have involved considerable uncertainty, mostly from the lack of real-world measurements of emission factors. In this study, we conducted a comprehensive evaluation on PAH emissions from biomass burning in real-world cooking stoves in three Chinese provinces. PAH emission factors, in both particle- and gas-phase, from 11 fuel-stove combinations were measured and the provincial emissions were estimated based on the measured emission factors and fuel consumption. The measured PAH28 emission factors (including 16 US EPA priority PAHs and 12 non-priority PAHs) ranged from 42 mg/kg to 370 mg/kg, with an order of magnitude difference, which was mostly affected by fuel type. The emission factors measured in this study were generally higher than those reported in laboratory studies and were comparable with field studies. The gas-particle distribution indicated that the absorption of PAHs by organic carbon in particulate matter (PM) was the dominant sorption mechanism in gas-particle distribution. The composition profile was different from previous studies, especially for non-priority PAHs, which are highly toxic and should be given more attention. Following the disparities in composition profiles, our study suggests that source apportionment based on single- or multi-diagnostic ratios may lead to large bias and uncertainties. It appears that the toxicity potential of PAHs in northern China emitted from combustion of crop residues is greater than that in southern China where PAHs are mainly emitted from wood combustion. © 2020 Elsevier Ltd

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