基于Tenax脱附技术评价洋山港海域悬浮物中多环芳烃的生物有效性

发布时间：2018-03-25 01:24

  本文选题：Tenax萃取　切入点：多环芳烃　出处：《生态环境学报》2017年02期

【摘要】：在测定海洋生物对洋山港海域悬浮物中多环芳烃(Polycyclic Aromatic Hydrocarbons,PAHs)富集系数的基础上,结合Tenax连续萃取法研究悬浮物中PAHs的脱附动力学,为评价洋山港悬浮物中PAHs的生物有效性提供简单、快速的评价方法。结果表明,洋山港海域生物对悬浮物中PAHs的生物-底泥富集因子(BSAF)处于0.02~0.21之间,说明该海域生物体对悬浮物中PAHs的富集程度较低;悬浮物中PAHs的快速脱附比例(Frap)处在20~40%之间,且快速、慢速和极慢速脱附速率常数数量级分别为10~(-1)、10~(-2)和10~(-4);此外Tenax 6 h单点萃取的PAHs浓度与大多数海洋生物体内的累积浓度相关性良好(0.64r20.80,P0.01),表明Tenax 6 h单点萃取比例可以简便、快速地预测悬浮物中PAHs在海洋生物体内的累积量。该方法可用于评价海域悬浮物PAHs的污染并为相关海产品的质量安全和食用风险提供生物有效性评价依据。
[Abstract]:Based on the determination of the enrichment coefficient of polycyclic Aromatic hydrocarbons (PAHs) in suspended matter of marine life in Yangshan Harbor, the desorption kinetics of PAHs in suspended matter was studied by Tenax continuous extraction method, which provided a simple method for evaluating the bioavailability of PAHs in suspended matter of Yangshan Harbor. The results show that the bioaccumulation factor of PAHs in suspended sediment is between 0.02 and 0.21, which indicates that the concentration of PAHs in suspended solids is low in this sea area. The rapid desorption ratio of PAHs in suspended solids was between 20% and 40%, and the ratio was very fast. The order of magnitude of slow desorption rate constant and extremely slow desorption rate constant are 10 ~ 10 ~ (-2) and 10 ~ (-4), respectively. In addition, the concentration of PAHs extracted by Tenax for 6 h has a good correlation with the accumulated concentration in most marine organisms, which indicates that the ratio of Tenax _ (6) h single point extraction is simple and convenient. This method can be used to evaluate PAHs pollution and provide bioavailability evaluation basis for the quality safety and edible risk of marine products.
【作者单位】： 上海海洋大学水产动物遗传育种中心//上海市协同创新中心;
【基金】：上海海洋大学水产动物遗传育种协同创新中心项目(A1-2037-16-0001-12)
【分类号】：X55
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本文编号：1660929