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作者

来源

URBAN FORESTRY & URBAN GREENING,Vol.21,P.153-157

语言

英文

关键字

BVOCs; 2-ethylhexanol; Isoprene; Tehran; Urban pollution; VOLATILE ORGANIC-COMPOUNDS; STRONG AIRWAY IRRITANTS; ISOPRENE EMISSION; BIOGENIC EMISSIONS; RATE VARIABILITY; OZONE; TEMPERATURE; 2-ETHYLHEXANOL; MIXTURES; TERPENES

作者单位

[Khedive, Ehsan; Shirvany, Anoushirvan] Univ Tehran, Fac Nat Resources, Dept Forestry & Forest Econ, Chamran Blvd,POB 31585-4314, Karaj, Iran. [Assareh, Mohammad Hassan] Inst Med Plants Technol & Dev, Mola Sadra Rd,POB 14155-1565, Tehran, Iran. [Sharkey, Thomas D.] Michigan State Univ, Dept Biochem & Mol Biol, 603 Wilson Rd,Rm 201, E Lansing, MI 48824 USA. Shirvany, A (reprint author), Univ Tehran, Fac Nat Resources, Dept Forestry & Forest Econ, Chamran Blvd,POB 31585-4314, Karaj, Iran. E-Mail: e.khedive@ut.ac.ir; Shirvany@ut.ac.ir; asareh@gmail.com; tsharkey@msu.edu

摘要

Controlling and monitoring air quality in cities requires understanding anthropogenic sources, but also natural sources must be considered. This is because beneficial Biogenic Volatile Organic Compounds (BV0C5) can exacerbate air pollution by reacting with anthropogenic pollutants. Although these compounds help trees survive, they may have negative effect on human life in polluted cities. In this study we measured terpenoid emissions of urban trees early and late in the growing season, using Solid Phase Micro-extraction (SPME) in a branch enclosure system. Results showed that Robinia pseudoacacia and Piatanus orientalis emitted significant amounts of isoprene throughout the season. Isoprene emission early in the season was roughly the same for both species. Late in the season, the standardized emission rate increased to 17.8 and 45 tigg(-1) dw h(-1) for R. pseudoacacia and P. orientalis, respectively. Furthermore, all trees emitted significant amounts of 2-ethylhexanol late in the season (7.3, 7.9, and 9.2 tigg(-1) dw h(-1) for Fraxinus rotundifolia, R. pseudoacacia, and P. orientalis, respectively). In conclusion, trees that are typically planted in urban Tehran, emit significant amounts of isoprene. Planting more F. rotundifolia and fewer P. orientalis trees would help improve air quality in Tehran and the cities like Tehran. (C) 2016 Elsevier GmbH. All rights reserved.