Department of Marine Environmental Informatics, National Taiwan Ocean University, Keelung 202, Taiwan; Institute of Marine Biology, National Dong Hwa University, Pingtung, Taiwan.
Department of Marine Environmental Informatics, National Taiwan Ocean University, Keelung 202, Taiwan.
Mar Pollut Bull. 2022 Sep;182:113967. doi: 10.1016/j.marpolbul.2022.113967. Epub 2022 Jul 28.
The trace metals species in surface sediments of the Taiwanese river estuarine mouths and the Taiwan Strait were examined by sequential extraction method. Based on the metal species present in sediments, trace metals can be divided into three groups: (1) Co, Cr, Fe, Ni and Zn; (2) Cu and Hg; and (3) Mn and Pb. The total concentrations of trace metals in the first two groups are dominated by the residual fraction. While, Cu and Hg their organic species also contributes a significant percentage and reduces the residual fraction portion. Lead and Mn are dominated by the labile fraction. The total metal concentrations in the analyzed sediments seem to be influenced by Fe oxides, TOC and grain size. The metals contamination status assessed by three environmental indices suggests that the analyzed sediments are minor contaminated by trace metals, with a few exceptions of Cu and Hg at some stations.
采用连续提取法研究了台湾河口和台湾海峡表层沉积物中痕量金属的赋存形态。根据沉积物中金属的存在形态，痕量金属可分为三组：（1）Co、Cr、Fe、Ni 和 Zn；（2）Cu 和 Hg；和（3）Mn 和 Pb。前两组痕量金属的总浓度主要以残渣态为主。而 Cu 和 Hg 的有机形态也占很大比例，降低了残渣态的比例。Pb 和 Mn 主要以可利用态为主。分析沉积物中的总金属浓度似乎受 Fe 氧化物、TOC 和粒径的影响。用三种环境指数评估的金属污染状况表明，除了少数站点的 Cu 和 Hg 外，分析沉积物受到痕量金属的轻微污染。
