Airborne volatile aromatic hydrocarbons at an urban monitoring station in Korea from 2013 to 2015

被引:21
作者
Khan, Azmatullah [1 ]
Szulejko, Jan E. [1 ]
Kim, Ki-Hyun [1 ]
Brown, Richard J. C. [2 ]
机构
[1] Hanyang Univ, Dept Civil & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea
[2] Natl Phys Lab, Dept Chem Med & Environm Sci, Teddington TW11 0LW, Middx, England
基金
新加坡国家研究基金会;
关键词
Benzene; Toluene; Air pollution; Urban; Seoul; ORGANIC-COMPOUNDS VOCS; AIR-QUALITY; AMBIENT AIR; EMISSION SOURCES; SOURCE-RECONCILIATION; SEOUL; ATMOSPHERE; CITY; POLLUTANTS; TRENDS;
D O I
10.1016/j.jenvman.2017.12.055
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The concentrations of C-6-C-10 volatile aromatic hydrocarbons (AHCs) in air were measured at an urban air quality monitoring station in Jong-Ro, Seoul, Korea, between 2013 and 2015. Their temporal patterns (e.g., diurnal, intraweek, daily) were assessed individually and collectively as groups of benzene, toluene, ethylbenzene, styrene, and xylene (BTESX); total aliphatic hydrocarbon (TALHC: C-2-C-12); total aromatic hydrocarbon (TARHC: C-6-C-10); and total hydrocarbon (THC: C-2-C-12). The highest mean AHC concentrations over the 3-year study (in ppb (v/v)) were observed for toluene (6.0 +/- 43), followed by the xylenes (1.5 +/- 13), ethylbenzene (0.85 +/- 0.93), benzene (0.73 +/- 0.77), and styrene (0.16 +/- 0.30) nL/L. The mean ppbC ((v/v), nL.atm.C/nL.atm) values for BTESX, TALHC, TARHC, and THC were 65.8, 113, 77.7, and 191 ppbC, respectively. For most AHC species (e.g., toluene, styrene, and BTESX), only weak seasonal trends were observed in contrast to temporally varying species like nitric oxide (NO) (e.g., 263 ppb (January-February) vs. 8.5 ppb (July-August) during weekdays in 2013). Furthermore, toluene and NO concentrations were much higher (up to a factor 3) on weekdays than on Sunday for most weeks. This might reflect reduced anthropogenic activities on Sunday. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:525 / 538
页数:14
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