Li Chaocan, Huo Shouliang, Yu Zhiqiang, Guo Wei, Xi Beidou, He Zhuoshi, Zeng Xiangying, Wu Fengchang
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing 100012, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing 100012, China.
J Environ Sci (China). 2016 Mar;41:261-269. doi: 10.1016/j.jes.2015.05.007. Epub 2015 Jun 26.
Sediment core samples collected from Lake Chaohu were analyzed for 15 priority polycyclic aromatic hydrocarbons (PAHs) to assess the spatial and temporal distributions of the PAHs during lacustrine sedimentary processes and regional economic development. Assessing the PAH sedimentary records over an approximately 100-year time span, we identified two stages in the PAH inputs and sources (before the 1970s and after the 1970s) in the eastern lake region near a village, whereas three stages (before the 1950s, 1950s-1990s and after the 1990s) were identified in the western lake region near urban and industrial areas. Rapid increases in the PAH depositional fluxes occurred during the second stage due to increased human activities in the Lake Chaohu basin. The composition and isomeric ratios of the PAHs revealed that pyrolysis is the main source of PAHs in this lake. Strong positive relationships between PAH concentration and the total organic carbon concentration, sediment grain size (<4μm), as well as the local population and Gross Domestic Product indicated that the sedimentary conditions impact the depositional characteristics of the PAHs; simultaneously, socioeconomic activities, such as energy consumption and the levels of urban industrialization and civilization, affect both the composition and abundance of the PAHs.
对从巢湖采集的沉积物岩芯样本进行了15种优先多环芳烃（PAHs）分析，以评估湖泊沉积过程和区域经济发展期间PAHs的时空分布。通过评估大约100年时间跨度内的PAH沉积记录，我们在一个村庄附近的东部湖区确定了PAH输入和来源的两个阶段（20世纪70年代之前和之后），而在城市和工业区附近的西部湖区确定了三个阶段（20世纪50年代之前、20世纪50年代至90年代以及20世纪90年代之后）。由于巢湖流域人类活动增加，第二阶段PAH沉积通量迅速增加。PAHs的组成和异构体比例表明，热解是该湖泊PAHs的主要来源。PAH浓度与总有机碳浓度、沉积物粒度（<4μm）以及当地人口和国内生产总值之间存在强正相关关系，表明沉积条件影响PAHs的沉积特征；同时，能源消耗、城市工业化和文明程度等社会经济活动影响PAHs的组成和丰度。
