Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China.
Solid Waste and Chemicals Management Center of MEE, Beijing, 100029, China.
Molecules. 2021 Nov 11;26(22):6828. doi: 10.3390/molecules26226828.
A sedimentary record of the 16 polycyclic aromatic hydrocarbon (PAH) pollutants from Dongping Lake, north China, is presented in this study. The influence of regional energy structure changes for 2-6-ring PAHs was investigated, in order to assess their sources and the impact of socioeconomic developments on the observed changes in concentration over time. The concentration of the ΣPAH ranged from 77.6 to 628.0 ng/g. Prior to the 1970s, the relatively low concentration of ΣPAH and the average presence of 44.4% 2,3-ring PAHs indicated that pyrogenic combustion from grass, wood, and coal was the main source of PAHs. The rapid increase in the concentration of 2,3-ring PAHs between the 1970s and 2006 was attributed to the growth of the urban population and the coal consumption, following the implementation of the Reform and Open Policy in 1978. The source apportionment, which was assessed using a positive matrix factorization model, revealed that coal combustion was the most important regional source of PAHs pollution (>51.0%). The PAHs were mainly transported to the site from the surrounding regions by atmospheric deposition rather than direct discharge.
本研究提供了来自中国北方东平湖的 16 种多环芳烃（PAH）污染物的沉积记录。研究调查了区域能源结构变化对 2-6 环 PAH 的影响，以评估它们的来源以及社会经济发展对观察到的浓度随时间变化的影响。ΣPAH 的浓度范围为 77.6 至 628.0ng/g。在 20 世纪 70 年代之前，ΣPAH 的浓度相对较低，并且 44.4%的 2,3 环 PAH 的平均存在表明，来自草、木和煤的热解燃烧是 PAHs 的主要来源。20 世纪 70 年代至 2006 年期间，2,3 环 PAH 浓度的快速增加归因于 1978 年改革开放以来城市人口的增长和煤炭消费的增加。使用正矩阵因子模型进行的源分配表明，煤炭燃烧是 PAHs 污染的最重要的区域来源（>51.0%）。PAHs 主要通过大气沉积而不是直接排放从周边地区输送到该地点。
