Department of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Malaysia; Air Division, Department of Environment, Ministry of Environment and Water, 62574, Putrajaya, Malaysia.
Department of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Malaysia.
Chemosphere. 2022 Sep;302:134852. doi: 10.1016/j.chemosphere.2022.134852. Epub 2022 May 6.
This study aims to determine the trends of volatile organic compound (VOC) concentrations and their potential contribution to O formation. The hourly data (August 2017 to July 2018) for 29 VOCs were obtained from three Malaysian Department of Environment continuous air quality monitoring stations with different urban backgrounds (Shah Alam, Cheras, Seremban). The Ozone Formation Potential (OFP) was calculated based on the individual Maximum Incremental Reactivity (MIR) and VOC concentrations. The results showed that the highest mean total VOC concentrations were recorded at Cheras (148 ± 123 μg m), within the Kuala Lumpur urban environment, followed by Shah Alam (124 ± 116 μg m) and Seremban (86.4 ± 89.2 μg m). VOCs such as n-butane, ethene, ethane and toluene were reported to be the most abundant species at all the selected stations, with overall mean concentrations of 16.6 ± 11.9 μg m, 12.1 ± 13.3 μg m, 10.8 ± 11.9 μg m and 9.67 ± 9.00 μg m, respectively. Alkenes (51.3-59.1%) and aromatic hydrocarbons (26.4-33.5%) have been identified as the major contributors to O formation in the study areas based on the overall VOC measurements. Relative humidity was found to influence the concentrations of VOCs more than other meteorological parameters. Overall, this study will contribute to further understanding of the distribution of VOCs and their contribution to O formation, particularly in the tropical urban environment.
本研究旨在确定挥发性有机化合物（VOC）浓度的趋势及其对 O 形成的潜在贡献。从具有不同城市背景（沙阿兰、蕉赖、芙蓉）的三个马来西亚环境部连续空气质量监测站获得了 29 种 VOC 的每小时数据（2017 年 8 月至 2018 年 7 月）。根据个别最大增量反应性（MIR）和 VOC 浓度计算了臭氧形成潜力（OFP）。结果表明，在吉隆坡城市环境中，蕉赖的总 VOC 浓度最高（148±123μg/m），其次是沙阿兰（124±116μg/m）和芙蓉（86.4±89.2μg/m）。在所有选定的站点，报告了 n-丁烷、乙烯、乙烷和甲苯等 VOC 是最丰富的物质，其总浓度分别为 16.6±11.9μg/m、12.1±13.3μg/m、10.8±11.9μg/m 和 9.67±9.00μg/m。根据总 VOC 测量结果，烯烃（51.3-59.1%）和芳香烃（26.4-33.5%）被确定为研究区域 O 形成的主要贡献者。发现相对湿度比其他气象参数更能影响 VOC 浓度。总的来说，这项研究将有助于进一步了解 VOC 的分布及其对 O 形成的贡献，特别是在热带城市环境中。
