Ma Chuanliang, Lin Tian, Ye Siyuan, Ding Xigui, Li Yuanyuan, Guo Zhigang
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China.
Environ Pollut. 2017 Mar;222:146-152. doi: 10.1016/j.envpol.2016.12.065. Epub 2016 Dec 28.
The polycyclic aromatic hydrocarbons (PAHs) of a Pb-dated sediment core extracted from the Liaohe River Delta wetland were measured to reconstruct the sediment record of PAHs and its response to human activity for the past 300 years in Northeast China. The concentrations of the 16 U.S. Environmental Protection Agency priority PAHs (∑16PAHs) ranged from 46 to 1167 ng g in this sediment core. The concentrations of the 16 PAHs (especially 4- and 5+6-ring PAHs) after the 1980s (surface sediments 0-6 cm) were one or two orders of magnitudes higher than those of the down-core samples. The exponential growth of 4-ring and 5+6-ring PAH concentrations after the 1980s responded well to the increased energy consumption and number of civil vehicles resulting from the rapid economic development in China. Prior to 1950, relatively low levels of the 16 PAHs and a high proportion of 2+3-ring PAHs was indicative of biomass burning as the main source of the PAHs. A significant increase in the 2 + 3 ring PAH concentration from the 1860s-1920s was observed and could be attributed to a constant influx of population migration into Northeast China. It was suggested that the link between historical trend of PAHs and population or energy use involves two different economic stages. Typically, in an agricultural economy, the greater the population size, the greater the emission of PAHs from biomass burning, while in an industrial economy, the increase in sedimentary PAH concentrations is closely related to increasing energy consumption of fossil fuels.
对从辽河三角洲湿地提取的一个铅年代测定的沉积岩芯中的多环芳烃（PAHs）进行了测量，以重建过去300年中国东北地区PAHs的沉积记录及其对人类活动的响应。该沉积岩芯中16种美国环境保护局优先PAHs（∑16PAHs）的浓度范围为46至1167 ng/g。20世纪80年代之后（0 - 6厘米表层沉积物）的16种PAHs（尤其是4环和5 + 6环PAHs）浓度比岩芯下部样品高出一到两个数量级。20世纪80年代之后4环和5 + 6环PAH浓度的指数增长很好地反映了中国经济快速发展导致的能源消耗增加和民用车辆数量增加。1950年之前，16种PAHs含量相对较低，2 + 3环PAHs比例较高，表明生物质燃烧是PAHs的主要来源。观察到2 + 3环PAH浓度从19世纪60年代到20世纪20年代有显著增加，这可能归因于不断有移民涌入中国东北地区。研究表明，PAHs的历史趋势与人口或能源使用之间的联系涉及两个不同的经济阶段。通常，在农业经济中，人口规模越大，生物质燃烧产生的PAHs排放量就越大，而在工业经济中，沉积PAH浓度的增加与化石燃料能源消耗的增加密切相关。
