School of Geography Science, Nanjing Normal University, Nanjing, 210023, People's Republic of China.
Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing, 210023, People's Republic of China.
Arch Environ Contam Toxicol. 2018 Aug;75(2):187-198. doi: 10.1007/s00244-018-0525-y. Epub 2018 Apr 12.
Two sediment cores were collected from Dianchi Lake, a plateau lake in Southwest China, to study the temporal trends and to investigate the sources of sedimentary deposited polycyclic aromatic hydrocarbon. The ΣPAH16 concentration in the two sediment cores ranged from 172.5 to 2244.8 ng/g and from 211.4 to 1777.8 ng/g, with mean values of 1106.2 and 865.1 ng/g, respectively. Three temporal trends for the ΣPAH16 concentration and the composition of PAHs in Dianchi Lake all showed three typical changing stages: (1) slight changes in deeper segments before the 1950s; (2) a rapid increase in PAH concentrations between the 1960s and 1990s; and (3) a slight reduction from the 1990s onward. These trends differ from those observed in developed countries due to differences in the timing of industrialization and urbanization processes. According to the results of the molecular ratios and principal component analysis, the PAH deposition was dominated by coal combustion, wood combustion, and vehicle emissions before and after the 1960s, respectively.
从中国西南部的高原湖泊滇池采集了两个沉积岩心，以研究时间趋势并调查沉积多环芳烃的来源。两个岩心中ΣPAH16 的浓度范围分别为 172.5 至 2244.8ng/g 和 211.4 至 1777.8ng/g，平均值分别为 1106.2ng/g 和 865.1ng/g。滇池中ΣPAH16 浓度和 PAHs 组成的三个时间趋势均显示出三个典型的变化阶段：（1）1950 年代以前深层段的轻微变化；（2）1960 年代至 1990 年代之间 PAH 浓度的快速增加；（3）1990 年代以来的轻微减少。这些趋势与发达国家的趋势不同，这是由于工业化和城市化进程的时间不同。根据分子比和主成分分析的结果，1960 年代前后，PAH 的沉积分别主要来自煤炭燃烧、木材燃烧和机动车排放。
