Metal bioavailability and bioaccumulation in the polychaete Perinereis nuntia: relationship between predictions using chemical analysis and accumulation through actual exposures
Metal bioavailability and bioaccumulation in the polychaete Perinereis nuntia: relationship between predictions using chemical analysis and accumulation through actual exposures
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DOI：
10.11403/jset.22.41
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Billah Md.Masum;Kokushi Emiko;Uno Seiichi
中科院分区：
文献类型：
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作者：
Billah Md.Masum;Kokushi Emiko;Uno Seiichi
在本研究中，我们已经研究了通过化学分析获得的沉积物中重金属的预测生物利用度是否反映了多毛类动物，围沙蚕nuntia的实际积累。在这项研究中，P. nuntia暴露于从日本鹿儿岛湾的两个地点收集的沉积物中28天。多毛类对沉积物中的铜、锌等金属有吸附作用。从沉积物到多毛类的Cu和Zn的生物放大因子分别为0.002-0.052和0.062-0.066，且Zn在多毛类中的浓度高于Cu。此外，我们测量了地球化学组分中的金属含量，通过化学分析预测生物利用度，发现Cu为2-4%，Zn为16-21%。通过化学分析预测的生物利用度可以大致反映多毛类动物体内金属元素的实际吸收情况。因此，我们的结论是，通过地球化学形态预测金属生物利用度是有用的，可靠地估计实际的生物积累在底栖生物。
In the present study, we have examined whether the predicted bioavailability for heavy metals in sediments obtained through chemical analysis reflected the actual accumulation by the polychaete, Perinereis nuntia. In this study, P. nuntia was exposed to sediments collected from two sites of Kagoshima Bay, Japan, for 28 days. The polychaete adsorbed metals such as copper (Cu) and zinc (Zn) from sediments. Biomagnification factors from sediment to polychaete for Cu and Zn were 0.002–0.052 and 0.062–0.066, respectively, and Zn tended to be in higher concentrations in polychaete than Cu. Additionally, we measured metal content in geochemical fractions to predict the bioavailability through chemical analysis and was found to be 2-4% for Cu, and 16-21% for Zn. The prediction of bioavailability through chemical analysis could roughly reflect the actual absorbance of metals in the polychaete. Therefore, we conclude that the prediction of metal bioavailability through geochemical speciation is useful to reliably estimate actual bioaccumulation in the benthic organism.