School of Geography Science, Nanjing Normal University, Nanjing, 210023, PR China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing, 210023, PR China.
School of Geography Science, Nanjing Normal University, Nanjing, 210023, PR China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing, 210023, PR China; Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, Nanjing, 210023, PR China; State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing, 210023, PR China.
Chemosphere. 2020 Jun;248:126015. doi: 10.1016/j.chemosphere.2020.126015. Epub 2020 Jan 23.
Sixteen polycyclic aromatic hydrocarbons (PAHs) in a sediment core from Dianchi Lake, southwest China, were analysed. The influence of changes in China's energy structure for 2-6 ringed PAHs was investigated to assess sources and the impact of socioeconomic development on temporal changes in concentrations. The concentration of the ΣPAH ranged from 746 to 2293 ng g. Prior to the 1960s relatively low concentrations of the ΣPAH and a larger proportion of 2-3-ring PAHs indicated that biomass combustion was the main source of PAHs. A rapid increase in the concentrations of 2-3 ring PAHs between 1975 and 2004 was attributed to population growth and coal consumption. A declining trend since 2004 was interpreted as being due to local changes in household energy usage. Increased concentrations of 4-ring PAH between 1975-2005 and 5-6-ring PAHs between the 1980s to 2004 showed correlations with increased coal consumption and the number of motor vehicles, respectively. These were caused by rapid urbanization and industrialization in the Dianchi watershed following the implementation of the Reform and Open Policy in 1978. A subsequent decline in the concentrations of 4-ring and 5-6-ring PAHs may have been due to decreased coal consumption and improvements in emission standards, respectively. Source apportionment by a PMF model revealed that coal combustion (29.2%), vehicle emissions (24.2%), petrogenic sources (21.8%), and biomass combustion (24.9%) were the sources of PAHs in the lake sediment core, and that coal combustion was the most important regional source of PAHs pollution.
对中国西南滇池湖底岩芯中的 16 种多环芳烃 (PAHs) 进行了分析。研究了中国 2-6 环 PAHs 能源结构变化对其来源的影响，以及社会经济发展对浓度时间变化的影响。ΣPAH 的浓度范围为 746-2293ng/g。在 20 世纪 60 年代之前，ΣPAH 的浓度相对较低，2-3 环 PAHs 的比例较大，表明生物质燃烧是 PAHs 的主要来源。1975 年至 2004 年间，2-3 环 PAHs 浓度迅速增加，这归因于人口增长和煤炭消耗。自 2004 年以来，浓度呈下降趋势，这被解释为家庭能源使用的局部变化。1975-2005 年间 4 环 PAH 浓度增加，以及 20 世纪 80 年代至 2004 年间 5-6 环 PAH 浓度增加，分别与煤炭消耗和汽车数量的增加有关。这是由于 1978 年改革开放以来滇池流域快速城市化和工业化所致。4 环和 5-6 环 PAH 浓度随后下降可能是由于煤炭消耗减少和排放标准提高所致。PMF 模型的源分配表明，煤炭燃烧 (29.2%)、车辆排放 (24.2%)、石油源 (21.8%) 和生物质燃烧 (24.9%) 是湖泊沉积物中 PAHs 的来源，其中煤炭燃烧是 PAHs 污染的最重要的区域来源。
