Concentrations and sources of PAHs in surface sediments of the Fenhe reservoir and watershed, China
Concentrations and sources of PAHs in surface sediments of the Fenhe reservoir and watershed, China
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DOI：
10.1016/j.ecoenv.2011.08.021
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发表时间：
2012-01-01
影响因子：
6.8
通讯作者：
Feng, Yin-Chang
中科院分区：
文献类型：
--
作者：
Li, Wei-Hong;Tian, Ying-Ze;Feng, Yin-Chang
测定了汾河水库及流域28个采样点表层沉积物中16种多环芳烃的含量。Sigma多环芳烃浓度范围为539.0 ~ 6281.7，平均值为2214.8 ng/g。2-3环多环芳烃占总多环芳烃的55%，是主要的多环芳烃。将28个站点分为三个区段：汾河干流、主要分支河口和汾河水库。各主要分支河口的σ PAHs含量最高。采用生物阈值法进行了生态风险评价。结果表明，多环芳烃的浓度可能会引起轻度但非急性的不良生物效应。此外，还采用多环芳烃比值、主成分/多重线性回归（PCA/MLR）和系统聚类分析等方法对污染源进行了评价。煤燃烧（35%），柴油和汽油排放（分别为29%和16%）可能是重要的来源。汾河水库区主要污染物来源复杂，其它两段主要受燃煤污染物影响。(C)2011 Elsevier Inc. All rights reserved.
Sixteen PAHs in surface sediments at 28 sites throughout Fenhe reservoir and watershed were measured. The Sigma PAHs concentrations ranged from 539.0 to 6281.7 with the mean of 2214.8 ng/g. The 2-3 rings PAHs, contributing 55 percent to Sigma PAHs, were the dominant species. Twenty-eight sites were grouped into three segments: Fenhe principal stream, estuaries of main branch streams, and Fenhe reservoir. Sigma PAHs was highest in the estuaries of main branch streams. The ecological risk assessment was studied by biological thresholds. The results showed levels of PAHs might cause mild but not acute adverse biological effects. In addition, PAHs ratios, PCA/MLR and hierarchical clustering analysis were applied to evaluate the possible sources. Coal combustion (35 percent), diesel and gasoline emissions (29 percent and 16 percent, respectively) might be the important sources. For sites in Fenhe reservoir, the major sources were complex, while other two segments were mainly influenced by coal combustion source. (C) 2011 Elsevier Inc. All rights reserved.