Xie Fazhi, Cai Gege, Zhang Daode, Li Guolian, Li Haibin, Xu Baile, Zhang Jiamei, Wang Jizhong
School of Environmental and Energy Engineering, Anhui Jianzhu University, 230601, Hefei, Anhui, China.
Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany.
Bull Environ Contam Toxicol. 2022 Dec 27;110(1):27. doi: 10.1007/s00128-022-03670-9.
As a systematic research at basin scale, this study investigated the spatial distribution, source apportionment and ecological risks of eighteen polycyclic aromatic hydrocarbons (PAHs) in surface sediments at different functional regions (rivers, lakes and reservoirs) from Taihu basin. Results showed that the mean values of 18 PAHs (defined as ∑PAHs) in river sediments (1277 ng/g) was much higher than those observed in lake sediments (243 ng/g) and reservoir sediments (134 ng/g). The accumulation of PAHs in river sediments was largely impacted by the local social-economic development and energy consumption. The positive matrix factorization (PMF) and isomer ratios analysis of PAHs suggest that relative contributions to PAHs in sediments were 15% for gasoline and heavy oil combustion, 9% for oil spills, 30% for coal combustion, 23% for traffic source, and 23% for diagenetic source. Ecological risk assessment based upon risk quotient (RQ) method indicated that sediments at Taihu basin have suffered moderate risk of PAHs.
作为一项流域尺度的系统研究，本研究调查了太湖流域不同功能区（河流、湖泊和水库）表层沉积物中18种多环芳烃（PAHs）的空间分布、源解析及生态风险。结果表明，河流沉积物中18种PAHs（定义为∑PAHs）的平均值（1277 ng/g）远高于湖泊沉积物（243 ng/g）和水库沉积物（134 ng/g）。河流沉积物中PAHs的积累在很大程度上受到当地社会经济发展和能源消耗的影响。PAHs的正定矩阵因子分解（PMF）和异构体比值分析表明，沉积物中PAHs的相对贡献分别为：汽油和重油燃烧占15%，石油泄漏占9%，煤炭燃烧占30%，交通源占23%，成岩源占23%。基于风险商数（RQ）方法的生态风险评估表明，太湖流域沉积物已遭受PAHs的中度风险。
