Distribution, sources and ecological risk assessment of polycyclic aromatic hydrocarbons in water and sediments from Tiber River and estuary, Italy.
Distribution, sources and ecological risk assessment of polycyclic aromatic hydrocarbons in water and sediments from Tiber River and estuary, Italy.
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DOI：
10.1016/j.scitotenv.2016.05.183
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发表时间：
2016-10
期刊：
影响因子：
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通讯作者：
P. Montuori;Sara Aurino;Fatima Garzonio;P. Sarnacchiaro;A. Nardone;M. Triassi
中科院分区：
文献类型：
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作者：
P. Montuori;Sara Aurino;Fatima Garzonio;P. Sarnacchiaro;A. Nardone;M. Triassi
对台伯河中多环芳烃(PAHs)的浓度、来源、生态风险及其对第勒尼安海(地中海中部)的环境影响进行了估算。对4个不同季节21个采样点的水体溶解相(DP)、悬浮颗粒物(SPM)和沉积物中的16种优先多环芳烃进行了测定。多环芳烃在L−中的总浓度为10.3~951.6 ng/−，在水中的总浓度为36.2~545.6 ng/g，在沉积物中的总浓度为36.2~545.6 ng/g。多环芳烃组成分析表明，DP中富含2~4环多环芳烃，SPM样品中以4~6环多环芳烃为主，沉积物中富含4~5环多环芳烃。诊断率分析表明，多环芳烃主要来源于热解。致癌多环芳烃的毒性当量浓度为45.3ngTEQ/g−/1，表明台伯河的致癌风险较低。计算出进入海洋的多环芳烃总量约为3161.7公斤/年−，表明这条河流是这些污染物对第勒尼安海的主要贡献源之一。
The concentration, source and ecological risk of polycyclic aromatic hydrocarbons (PAHs) in the Tiber River and its environmental impact on the Tyrrhenian Sea (Central Mediterranean Sea) were estimated. The 16 priority PAHs were determined in the water dissolved phase (DP), suspended particulate matter (SPM) and sediments collected from 21 sites in four different seasons. Total concentrations of PAHs ranged from 10.3 to 951.6 ng L− 1and from 36.2 to 545.6 ng g− 1in water (sum of DP and SPM) and in sediment samples, respectively. The compositions of PAHs showed that 2- to 4-ring PAHs were abundant in DP, 4- to 6-ring PAHs were predominant in SPM samples, and 4- to 5-ring PAHs were abundant in sediments. The diagnostic ratio analysis indicated that the PAHs mainly had a pyrolytic source. The toxic equivalent concentration of carcinogenic PAHs was 45.3 ngTEQ g− 1, suggesting low carcinogenic risk for Tiber River. Total PAHs loads into the sea were calculated in about 3161.7 kg year− 1showing that this river is one of the main contribution sources of these contaminants to the Tyrrhenian Sea.