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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Characterization and distribution of PAHs in surface sediments of Daliao River, China
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Characterization and distribution of PAHs in surface sediments of Daliao River, China

机译：大辽河表层沉积物中多环芳烃的特征与分布

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摘要

The concentrations of 16 priority pollutant PAHs in the samples of Daliao River were analyzed by a method based on Soxhlet extraction, solid-phase extraction clean-up and high performance liquid chromatography-programmable fluorescence/ultra violet detection. The total concentrations of PAHs in Daliao River ranged from 267.9 ng/g to 9,212 ng/g. The highest concentration of PAHs was 9,212 ng/g at the Station 24 (Anshan Railroad Bridge), and the lowest 267.9 ng/g at the Station 19 (Estuary). Compared with the total concentrations of PAHs of rivers in other parts of the world, the degree of contamination of Daliao River by PAHs was moderate to high. Specific compounds or groups of PAHs have been used as molecular markers to differentiate petrogenic and pyrogenic origin. The results showed that the main sources of PAHs in Daliao River were pyrolytic inputs such as combustion of coal, wood and petrogenic chemicals. The data was also compared by mean of two guideline values, an effects range-low (ER-L) and effects range-medium (ER-M), to assess the potential biological effects of the sediment adsorbed PAHs. It showed that the PAHs in some sites of Daliao River would exert adverse biological effects.
机译：采用索氏提取，固相萃取净化和高效液相色谱-可编程荧光/超紫检测方法对大辽河水样中的16种优先污染物PAHs进行了分析。大辽河中多环芳烃的总浓度为267.9 ng / g至9,212 ng / g。在24号车站（鞍山铁路桥），PAHs的最高浓度为9,212 ng / g，在19号车站（海口），最低的PAHs浓度为267.9 ng / g。与世界其他地区河流中多环芳烃的总浓度相比，大辽河被多环芳烃的污染程度为中到高。特定的PAHs化合物或基团已用作分子标记，以区分成岩和热成因。结果表明，大辽河地区多环芳烃的主要来源是煤，木材燃烧和成岩化学物质的热解投入。还通过两个指导值（低影响范围（ER-L）和中影响范围（ER-M））比较数据，以评估沉积物吸附的多环芳烃的潜在生物学效应。结果表明，大辽河部分地区的多环芳烃具有不良的生物学效应。

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