太湖及周边河流表层沉积物中PAHs的分布、来源与风险评价

发布时间：2018-04-15 15:00

本文选题：多环芳烃 + 沉积物　；参考：《中国环境科学》2017年03期

【摘要】：对太湖及周边河流表层沉积物中16种美国环保署优先控制的PAHs含量进行了检测和分析.结果表明,太湖沉积物中PAHs总量介于0.77~4.20μg/g之间,平均值为1.63μg/g,太湖周边河流沉积物中PAHs总量介于0.58~6.13μg/g之间,平均值为2.92μg/g.不同湖区沉积物中PAHs的空间分布差异显著,其中梅梁湾、贡湖湾以及东太湖沉积物中PAHs含量分别为(2.48±1.14)μg/g、(1.89±0.52)μg/g和(2.13±0.50)μg/g,周边河流中梁溪河、吴淞江及长兴港含量分别为7.34,6.13,5.54μg/g.利用低环/高环比值法、同分异构体比值法和主成分分析-多元线性回归(PCA-MLR)模型分析了污染源类型及贡献率,结果表明,太湖及其周边河流表层沉积物中PAHs主要来源为燃烧来源,太湖沉积物PAHs石油源贡献率为24%,燃烧源贡献率为76%,太湖周边河流石油源贡献率为41%,燃烧源贡献率为59%.使用沉积物质量标准法(SQSs)和Ba PE(Ba P当量浓度)对PAHs毒性进行评估,得出太湖及周边河流具有一定的潜在毒性,尤其是太湖周边河流.
[Abstract]:Sixteen PAHs contents in surface sediments of Taihu Lake and surrounding rivers were detected and analyzed.The results show that the total amount of PAHs in sediments of Taihu Lake is between 0.77 渭 g / g and 4.20 渭 g / g, with an average of 1.63 渭 g / g, and the total amount of PAHs in sediments of rivers around Lake Taihu is between 0.58 渭 g / g and 6.13 渭 g / g, with an average of 2.92 渭 g / g.The spatial distribution of PAHs in sediments of Meiliang Bay, Gonghu Bay and East Taihu Lake was 2.48 卤1.14 渭 g / g, 1.89 卤0.52 渭 g / g and 2.13 卤0.50 渭 g / g, respectively. The contents of PAHs in Meiliangxi River, Wusong River and Changxing River were 7.346.135.54 渭 g / g, respectively.The low ring / high ring ratio method, the isomer ratio method and the principal component analysis-multivariate linear regression (PCA-MLR) model were used to analyze the types of pollution sources and their contribution rates.The main source of PAHs in the surface sediments of Taihu Lake and its surrounding rivers is combustion, the contribution rate of PAHs oil source is 24, the contribution rate of combustion source is 76, the contribution rate of oil source is 41%, and the contribution rate of combustion source is 5959.The toxicity of PAHs was evaluated by means of sediment quality standard method (SQSs) and Ba PE(Ba P equivalent concentration. It was concluded that Taihu Lake and its surrounding rivers have potential toxicity, especially in the surrounding rivers of Taihu Lake.
【作者单位】：天津师范大学天津市水资源与水环境重点实验室;天津师范大学城市与环境科学学院;中国科学院地球化学研究所环境地球化学国家重点实验室;
【基金】：国家科技重大专项(2012ZX07503003001) 国家自然科学基金(41302285,41403082,40703021) 天津自然科学基金(14JCQNJC08600,14JCQNJC08800)
【分类号】：X52;X824

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