Anthropogenic input of polycyclic aromatic hydrocarbons into five lakes in Western China

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• 作者：Jianyang Guo ; Fengchang Wu ; Xiaojun Luo ; Zhang Liang ; Haiqing Liao ; Runyu Zhang ; Wen Li ; Xiaoli Zhao ; Shejun Chen ; Bixian Mai
• 关键词：Polycyclic aromatic hydrocarbon ; Sediment core ; Lake ; Western China
• 刊名：Environmental Pollution
• 出版年：2010
• 出版时间：June 2010
• 年：2010
• 卷：158
• 期：6
• 页码：2175-2180
• 全文大小：385 K

文摘

The temporal distribution of polycyclic aromatic hydrocarbons (PAHs) was examined in dated sediments from five lakes in Western China. The surficial concentrations of seven carcinogenic PAHs (BaA, Chyr, BbF, BkF, BaP, DBA and INP, hereafter denoted as PAH₇) were highly site-specific. The ΣPAH₇ concentrations generally increased from the deep layers to surface sediments. The temporal trends of ΣPAH₇ concentrations were clearly different from those reported in developed countries. From 1950s to 1980s, which PAHs started to decrease in developed countries, is the right period that PAHs started to increase rapidly in Western China. The fluxes and mass inventories suggest that the PAH₇ input over the past three decades was much more rapidly than it was before the 1980s. Source identification indicates that the PAHs were primarily from biomass burning and domestic coal combustion, and increasing vehicular and/or industrial coal combustion emission was also found.