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首页> 外文期刊>Environmental Science and Pollution Research >Sources appointment and ecological risk assessment of polycyclic aromatic hydrocarbons (PAHs) in sediments of Erhai Lake, a low-latitude and high-altitude lake in southwest China
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Sources appointment and ecological risk assessment of polycyclic aromatic hydrocarbons (PAHs) in sediments of Erhai Lake, a low-latitude and high-altitude lake in southwest China

机译：中国西南低纬高海拔湖泊Er海沉积物中多环芳烃的来源分配及生态风险评估

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Sixteen polycyclic aromatic hydrocarbons (PAHs) were analyzed from the surficial sediments in Erhai Lake, a plateau lake in China. The results showed that except for acenaphthylene (Ace) Ace and Dibenz(a,h)anthracene (DBA), the central region contained individual PAHs at concentrations lower than those in other lake regions. Total concentration of the PAHs (Sigma PAHs) in the sediments from Erhai Lake ranged from 32.42 to 558.53 mg/kg with a mean value of 256.70 mg/kg. The maximum value of Sigma PAHs was observed in the north region of the lake and more than 10-fold higher than the minimum values. Moreover, high molecular weight (HMW) PAHs, especially 5-ring PAHs, accounted for higher ratios up to 76 % relative to other PAHs compound in almost all sampling sites. Molecular diagnostic ratios including anthtacene (Ant)/(Ant + phenanthrene (Phe)), fluoranthene (Flt)/(Flt + pyrene (Pyr)), benz(a)anthracene (BaA)/(BaA + chrysene (Chr)), and indeno(1,2,3-cd)pyrene (IPY)/(IPY + benz(g,h,i)perylene (BPE)) were recorded at all sampling sites and indicated that the origin of PAHs in Erhai Lake was predominately pyrolytic. Furthermore, principal component analysis with component dominating by HMW PAHs showed that combustion origins were the primary contamination sources of PAHs in the sediments of Erhai Lake. Finally, ecological risk assessment indicated that the sediments from Erhai Lake are exposed to potential low risk for Sigma PAHs, and the ecological risk decreases in the order of northern region > southern region > central region.
机译：从中国高原湖泊Er海的表层沉积物中分析了十六种多环芳烃（PAHs）。结果表明，除烯（Ace）Ace和二苯并（a，h）蒽（DBA）外，中部地区所含的个别多环芳烃的含量低于其他湖泊地区。 Er海沉积物中多环芳烃（Sigma PAHs）的总浓度为32.42至558.53 mg / kg，平均值为256.70 mg / kg。在湖的北部地区发现了Sigma PAHs的最大值，比最小值高出十倍以上。此外，在几乎所有采样点中，相对于其他PAHs化合物，高分子量（HMW）PAHs，尤其是5环PAHs所占比例更高，高达76％。分子诊断比包括蒽（Ant）/（Ant +菲（Phe）），荧蒽（Flt）/（Flt +（（Pyr）），苯并（a）蒽（BaA）/（BaA +苯（Chr）），在所有采样点都记录了茚并（1,2,3-cd）py（IPY）/（IPY +苯并（g，h，i）per（BPE）），表明indicated海中多环芳烃的来源主要是热解的。此外，以高分子量多环芳烃为主的主成分分析表明，燃烧源是origin海沉积物中多环芳烃的主要污染源。最后，生态风险评估表明，Er海沉积物处于低风险的西格玛多环芳烃中，其生态风险的降序依次为北部>南部>中部。

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