Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, South Korea.
Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, South Korea.
J Environ Manage. 2018 Mar 1;209:525-538. doi: 10.1016/j.jenvman.2017.12.055.
The concentrations of C-C 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-C); total aromatic hydrocarbon (TARHC: C-C); and total hydrocarbon (THC: C-C). The highest mean AHC concentrations over the 3-year study (in ppb (v/v)) were observed for toluene (6.0 ± 4.3), followed by the xylenes (1.5 ± 1.3), 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., 26.3 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.
2013 年至 2015 年，在韩国首尔钟路区的一个城市空气质量监测站测量了空气中的 C-C 挥发性芳香烃 (AHC) 浓度。评估了它们的时间模式（例如，昼夜、周内、每日），并将它们作为苯、甲苯、乙苯、苯乙烯和二甲苯 (BTESX)；总脂肪族烃 (TALHC: C-C)；总芳烃 (TARHC: C-C)；和总碳氢化合物 (THC: C-C) 的组进行单独和集体评估。在为期 3 年的研究中，AHC 浓度的最高平均值（以 ppb（v/v）表示）出现在甲苯（6.0±4.3），其次是二甲苯（1.5±1.3），乙苯（0.85±0.93），苯（0.73±0.77）和苯乙烯（0.16±0.30）nL/L。BTESX、TALHC、TARHC 和 THC 的平均 ppbC（（v/v），nL·atm·C/nL·atm）值分别为 65.8、113、77.7 和 191 ppbC。对于大多数 AHC 物质（例如甲苯、苯乙烯和 BTESX），仅观察到较弱的季节性趋势，而对于像一氧化氮（NO）这样的时间变化物质（例如，2013 年工作日期间的 26.3 ppb（1 月至 2 月）与 8.5 ppb（7 月至 8 月））。此外，对于大多数星期，甲苯和 NO 浓度在工作日比在星期天高得多（高达 3 倍）。这可能反映了星期天人为活动减少。
