| Title: | An unneglected source to ambient brown carbon and VOCs at harbor area: LNG tractor truck |
| Author(s): | Bai Z; Shao J; Xu W; Zhu K; Zhao L; Wang L; Chen J; |
| Address: | "School of Ecology and Environment, Inner Mongolia University, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Institute of Eco-Chongming (IEC), Shanghai, China. China Construction Eighth Engineering Division Corp., Ltd., Shanghai 200112, China. Shanghai Jianke Environmental Techonology Co., Ltd, China. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Institute of Eco-Chongming (IEC), Shanghai, China. School of Ecology and Environment, Inner Mongolia University, China. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Institute of Eco-Chongming (IEC), Shanghai, China. Electronic address: wanglina@fudan.edu.cn" |
| DOI: | 10.1016/j.scitotenv.2023.165575 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "The ambient air quality of harbors area in Asia is commonly more polluted compared to other continents. The airborne pollutant is directly or indirectly related to a significant impact of traffic emissions. This study for the first time assessed the impacts on brown carbon (BrC) and volatile organic compounds (VOCs) from in-port liquid natural gas (LNG) tractor truck at harbor areas, via conducting real-time monitoring of VOCs characteristic and sampling for ambient air at a harbor (named as W harbor) in Shanghai, China, collecting emissions of in-port LNG tractor truck and miniCast in laboratory, as well as statistics of external container diesel trucks in the port for further validation. HPLC/DAD/Q-Tof MS was adopted for sample analysis. Results showed that many CHO compounds were associated with vehicle exhausts. Among of them, aliphatic CHO compounds with low degree of unsaturation were identified as fatty acids and fatty acid methyl esters extensively existing in fuel combustion emissions. And non-aliphatic CHO compounds characterized by low O/C ratios (<0.17) identified for the harbor air came from the emissions of in-port LNG power trucks with low-speed driving and idling. The ambient average non-methane total hydrocarbons (NMHC) concentration (0.59 ppm) at W harbor was much greater than that for other areas in Shanghai. The higher ratios of toluene/benzene (3.30) and m/p-xylene/ethylbenzene (3.11) observed at W harbor implied instead of external container diesel trucks, the dominating contributing of internal LNG tractor trucks to ambient VOCs cannot be neglected. This study concluded that LNG is not as clean as it was expected. The LNG-fueled vehicles can produce strong light-absorption chromophores as well as high concentration of VOCs" |
| Keywords: | Brown carbon Harbor area LNG tractor truck Molecular characteristic VOCs; |
| Notes: | "PubMed-not-MEDLINEBai, Zhe Shao, Jiantao Xu, Wei Zhu, Ke Zhao, Ling Wang, Lina Chen, Jianmin eng Netherlands 2023/07/28 Sci Total Environ. 2023 Nov 20; 900:165575. doi: 10.1016/j.scitotenv.2023.165575. Epub 2023 Jul 26" |
