兰州生物质燃烧VOCs排放特征及其大气环境影响

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Abstract

The emission inventory of volatile organic compounds(VOCs) from biomass burning was established by using the emission factor approach in Lanzhou City in 2016. Besides, the temporal and spatial distribution of VOCs was analyzed. Then the ozone formation potential (OFP) and the secondary organic aerosols (SOA) formation potential were estimated to assess the influence of VOCs emission from biomass burning on the atmospheric environment. The results showed that the total emissons of VOCs emitted by biomass burning was 6626.2t in Lanzhou City in 2016. The emission areas of high value were concentrated in the northeast and southeast of Yuzhong, central Yongdeng and south of Qilihe. The emission amounts were greater in regions with poor economic levels and large crop yields. Emissions were mainly concentrated in the heating season (November to March) and the harvest time of crops (July to August). The total OFP of biomass burning was 13880.3t in Lanzhou City in 2016. The smoldering Chinese kangs was the largest source of OFP contribution, accounting for 46.1%. Oxygenated volatile organic compounds (OVOCs) contributed the most to the OFP, accounting for 51.4%. The top 10OFP species were acetic acid, propylene, 2-butanone, toluene, formaldehyde, acetaldehyde, m/p-xylene, 1-butene, propionic acid and isoprene. The smoldering Chinese kangs was also the largest contributor to SOA, accounting for 46.5%. The aromatic hydrocarbons were the key components of SOA contribution, accounting for 62.2%. The top 10species of SOA formation potential were phenol, toluene, alpha-pinene, m/p-xylene, benzene, 1-xylene, indene, 1,2,4-trimethylbenzene, ethylbenzene, and 1,2,3-trimethylbenzene. To reduce the concentrations of ozone and SOA in the region, smoldering Chinese kangs and crop residue burning (maize) should be given more attention.

Key words： biomass burning volatile organic compounds emission characteristics ozone formation potential SOA formation potential

Received: 08 June 2018

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	Articles by authors
	GUO Wen-kai
	LIU Zhen
	LIU Wen-bo
	LIU Xiao
	ZHU Yu-fan
	CHEN Qiang

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GUO Wen-kai,LIU Zhen,LIU Wen-bo等. The characteristics of VOCs emission from biomass burning and its influence on atmospheric environment in Lanzhou City[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(1): 40-49.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I1/40

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