典型树种挥发性有机物(VOCs)排放成分谱及排放特征

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Abstract

In order to study the characteristics of biogenic volatile organic compounds (BVOCs) emission from typical trees and obtain their basic emission rates for each BVOC compound, a dynamic enclosed system was used to conduct laboratory measurements on poplar, sweetgum, and pine trees. BVOC compounds including isoprene, monoterpenes, sesquiterpenes, alkanes, and alkenes were analyzed by TD-GC-TOFMS. The normalized species-specific BVOC emission rates of three tree species were calculated and their emission profiles were investigated. The total BVOC emission rates of Populus trichocarpa, Liquidambar styraciflua, and Pinus massoniana were 19.51, 7.19, and 0.67μg/(g·h) (2086.91, 562.35, and 104.03μg/(m²·h)), respectively. Populus trichocarpa had the highest isoprene emission rate of 18.51μg/(g·h), contributing 94.86% to the total BVOC emissions. Pinus massoniana had a lower isoprene contribution (4.03%), but the highest monoterpenes contribution (49.09%. Liquidambar styraciflua had the highest monoterpenes emission rate of 0.84μg/(g·h). Sesquiterpenes contributed less than 1.5% to the total BVOC emissions for the three plants. The emission rates of alkanes for each tree species were generally higher than those of sesquiterpenes, and some were even higher than those of isoprene and monoterpenes. Trans-β-ocimene was the predominated monoterpene for Populus trichocarpa, accounting for 99.84% of its total monoterpene emissions. The monoterpenes emitted by Liquidambar styraciflua.was mainly composed by Sabinene and β-pinene. α-Pinene, sabinene, and β-pinene were observed as the dominated monoterpenes for Pinus massoniana. Trans-caryophyllene, humulene, δ-cadinene, and β-guaiene were prominent sesquiterpenes. Alkanes emitted from the three plants were mainly C4 and C5 compounds, of which particularly were isobutane and butane. 1-Butene was the most abundant alkene for all plants.

Key words： VOCs biogenic emission rate emission profile

Received: 15 May 2019

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X511

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	Articles by authors
	LI Ling-yu
	Alex B. Guenther
	GU Da-sa
	Roger Seco
	Sanjeevi Nagalingam

Cite this article:

LI Ling-yu,Alex B. Guenther,GU Da-sa等. Biogenic emission profile of volatile organic compounds from poplar, sweetgum, and pine trees[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(12): 4966-4973.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I12/4966

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