文献类型： 外文期刊

作者： Sun, Yuwei ¹ ; Zhang, Ruiqing ¹ ; Ma, Ruipeng ¹ ; Zhou, Haijun ³ ; Zhang, Fujin ⁴ ; Guo, Guanghui ⁵ ; Li, Huixian ² ; Lu, ¹ ;

作者机构： 1.Inner Mongolia Univ, Sch Ecol & Environm, Hohhot 010021, Inner Mongolia, Peoples R China

2.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China

3.Inner Mongolia Normal Univ, Coll Geog Sci, Hohhot 010022, Inner Mongolia, Peoples R China

4.Inner Mongolia Acad Agr & Anim Husb Sci, Inst Environm Resources & Analyt Tech, Hohhot 010031, Inner Mongolia, Peoples R China

5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China

关键词： Aquatic system; Organic pollutants; Sediment core; Total organic carbon; Diagnostic ratios; Polycyclic aromatic hydrocarbons

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN： 0944-1344

年卷期： 2021 年 28 卷 18 期

页码：

收录情况： SCI

摘要： Polycyclic aromatic hydrocarbons (PAHs) are typical toxic organic pollutants that can accumulate in sediments and may be toxic to aquatic organisms. In the present study, the contamination level, composition pattern, and sources of sixteen PAHs listed by the United States Environmental Protection Agency were investigated in surface sediments and a sediment core from Daihai Lake, which is located in a typical semiarid area of Inner Mongolia, China, and the ecological risk of these PAHs was assessed. The results show that the total concentration of PAHs in the surface sediments ranged from 204.6 to 344.5 ng/g with an average value of 287.2 ng/g and that compared with other aquatic systems, the level of PAHs in the sediments from Daihai Lake was low. However, a general upward trend was observed for the concentrations of PAHs in the sediment core, which might be related to the increase in human activities in the area. Moreover, the PAH concentrations were significantly positively correlated with the total organic carbon (TOC) content in the sediments, and it is thus inferred that TOC regulates the distribution of PAHs in Daihai Lake. Three-ring and four-ring PAHs were found to be predominant in all the sediment samples, and phenanthrene (Phe) was the most abundant compound. According to the composition of PAHs and the anthracene (Ant)/(Ant+Phe) or fluoranthene (Flt)/(Flt+pyrene (Pyr)) ratios, the PAHs in Daihai Lake mainly originated from the combustion of domestic coal, grass, and wood, and petroleum cannot be ignored as a source considering the growth of industry. Risk assessment based on a comparison of PAH concentrations and the effect range low (ERL) and effect range median (ERM) values demonstrated that acenaphthene (Ace) at 11 sites and fluorene (Flu) at 7 sites had occasional adverse biological effects.