【摘要】：2014年6月在長(zhǎng)江口及其鄰近海域采集了表層沉積物樣品,用連續(xù)提取法對(duì)Cr、Co、Ni、Cu、Zn、Al、Mn和Fe金屬元素的賦存形態(tài)進(jìn)行分離,即分作可交換態(tài)(EXC)、碳酸鹽結(jié)合態(tài)(CARB)、鐵錳氧化物結(jié)合態(tài)(ERO)、有機(jī)結(jié)合態(tài)(OSM)和殘?jiān)鼞B(tài)(RES)并測(cè)定了含量。結(jié)果表明,長(zhǎng)江口及其鄰近海域表層沉積物中的Cr主要賦存在OSM態(tài)中,Mn主要賦存在CARB態(tài)中,Ni在OSM態(tài)和ERO態(tài)含量相當(dāng),Co、Cu、Zn、Al和Fe元素主要賦存在ERO態(tài)中。長(zhǎng)江口及其鄰近海域D斷面表層沉積物中Cr、Co、Ni、Cu、Zn、Al、Mn和Fe元素的非殘?jiān)鼞B(tài)含量隨著離岸距離的增加而逐漸降低。ERO態(tài)金屬元素隨著沉積物中鐵錳水合氧化物的含量的升高而增加,且ERO-Cr、Co、Ni、Cu、Zn、Al與鐵錳水合氧化物含量之間有較好的相關(guān)性,說(shuō)明這些金屬元素受到鐵錳水合氧化物的影響。各金屬元素非殘?jiān)鼞B(tài)總量與ERO-Fe含量之間相關(guān)性也較好,說(shuō)明各元素非殘?jiān)鼞B(tài)受控于其各自主要的賦存形態(tài)。
[Abstract]:The surface sediment samples were collected in the Changjiang Estuary and its adjacent sea area in June 2014. The occurrence forms of mn and Fe metal elements were separated by continuous extraction method. It was divided into exchangeable (EXC), carbonate bound (CARB), iron-manganese oxide bound (ERO), organic bound (OSM) and residue (RES) and the content was determined. The results show that the Cr in the surface sediments of the Yangtze Estuary and its adjacent sea areas are mainly located in the OSM state and the CARB state, and the content of Ni in the OSM state is similar to that in the ERO state. The main elements of Cr in the surface sediments of the Yangtze River Estuary and its adjacent waters are in the ERO state. In the surface sediments of the D section of Yangtze River Estuary and its adjacent waters, the contents of non-residuals in the surface sediments of Cr-CoCo-NiCuCuOZnAlOMN and Fe gradually decrease with the increase of the distance from shore. The content of iron-manganese hydrates increases with the increase of the contents of iron-manganese hydrates in the sediments of the Yangtze Estuary and its adjacent waters. There is a good correlation between the content of iron and manganese hydrates and the content of iron and manganese hydrates, which indicates that these metal elements are affected by the hydrated oxides of iron and manganese. There is also a good correlation between the total amount of non-residue state and the content of ERO-Fe of each metal element, which indicates that the non-residue state of each element is controlled by their main occurrence forms.
【作者單位】： 中國(guó)海洋大學(xué)化學(xué)化工學(xué)院;海洋化學(xué)理論與工程技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室;中國(guó)海洋大學(xué)海洋地球科學(xué)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(41576078) 山東省自然科學(xué)基金(ZR2015DM006)資助
【分類號(hào)】：P736.4;X55

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