| Title: | "Characteristics of roadside volatile organic compounds in an urban area dominated by gasoline vehicles, a case study in Hanoi" |
| Author(s): | Ly BT; Kajii Y; Nguyen TY; Shoji K; Van DA; Do TN; Nghiem TD; Sakamoto Y; |
| Address: | "School of Environmental Science and Technology, Hanoi University of Science and Technology, No.1 Dai Co Viet Street, Hanoi, Viet Nam. Electronic address: thuy.lybich@hust.edu.vn. Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan; Graduate School of Human and Environmental Studies, Yoshida-Nihonmatsu-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Center for Regional Environmental Research, National Institute for Environmental Studies, Tsukuba City, Ibaraki, 305-8506, Japan. Electronic address: kajii.yoshizumi.7e@kyoto-u.ac.jp. Faculty of Environmental and Transport Safely, University of Transport and Communications, No.3 Cau Giay, Ngoc Khanh, Hanoi, Viet Nam. Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan. School of Environmental Science and Technology, Hanoi University of Science and Technology, No.1 Dai Co Viet Street, Hanoi, Viet Nam. Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan; Graduate School of Human and Environmental Studies, Yoshida-Nihonmatsu-cho, Sakyo-ku, Kyoto, 606-8501, Japan; Center for Regional Environmental Research, National Institute for Environmental Studies, Tsukuba City, Ibaraki, 305-8506, Japan" |
| DOI: | 10.1016/j.chemosphere.2020.126749 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Volatile organic compounds (VOCs) are important air pollution issues because of their potential health effects, and the contribution to ground ozone and secondary particulate matter. In this study, 53 VOC species near nine roads in Hanoi were monitored by sampling and analyzed by GC-FID four times per day on weekdays and in the morning on the weekend, from December 2014 to January 2015. In parallel with VOC sampling, vehicle number was counted, and meteorological conditions were recorded. A large share of motorbikes was found, accounted for 82% of overall for all period, and 88% in rush hours. The average TVOC concentration was 305.1 ppb; while those of BTEX were 12.8/27.4/4.8/15.9/6.0 ppb for benzene/toluene/ethylbenzene/m,p-xylenes/o-xylene, respectively. Isopentane was the most abundant species of VOCs. A significant carcinogenic risk of benzene species was found. Ozone formation potential (OFP) of VOCs was of 1752.7 ppb. Levels of VOC species reflected well the transportation volume. Strong correlations between motorbike number related parameters and ethylbenzene were found. High correlations were also found among ethylbenzene and almost all other VOC species. It implied that the majority of VOCs near road emitted from the same source, which is motorbikes. The calculation using emission factors from COPERT 5 model with conditions of fleets in Hanoi showed that VOCs from motorbikes contributed to more than 90% of the VOC level" |
| Keywords: | Air Pollutants/*analysis Air Pollution Benzene/analysis *Environmental Monitoring Gasoline/analysis Ozone/analysis Particulate Matter/analysis Pentanes Toluene/analysis Vietnam Volatile Organic Compounds/*analysis Xylenes Air quality Emission factor Gc-fi; |
| Notes: | "MedlineLy, Bich-Thuy Kajii, Yoshizumi Nguyen, Thi-Yen-Lien Shoji, Koki Van, Dieu-Anh Do, Thi-Nhu-Ngoc Nghiem, Trung-Dung Sakamoto, Yosuke eng England 2020/04/28 Chemosphere. 2020 Sep; 254:126749. doi: 10.1016/j.chemosphere.2020.126749. Epub 2020 Apr 15" |
