The significant role of colloids in the transport and transformation of organic carbon and associated trace metals (Cd, Cu and Ni) in the Rhône delta (France)
The significant role of colloids in the transport and transformation of organic carbon and associated trace metals (Cd, Cu and Ni) in the Rhône delta (France)
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DOI：
10.1016/0304-4203(95)00051-r
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发表时间：
1995-10
期刊：
影响因子：
3
通讯作者：
M. Dai;J. Martin;G. Cauwet
中科院分区：
文献类型：
--
作者：
M. Dai;J. Martin;G. Cauwet
为了更好地了解法国罗纳三角洲河口混合过程中有机碳和微量元素(Cd、Cu、Ni)在真溶解相和胶体相之间的分布，于1992年5月测定了有机碳和痕量元素(Cd、Cu、Ni)在真溶解相和胶体相之间的分布。胶体物质(104Dalton-0.4μm)采用超清洁错流过滤系统进行分离。所研究的有机碳和痕量金属的相当大一部分过去被认为存在于所谓的“溶解”池中，它们与胶体物质有关。胶体有机碳和胶体铜之间的显著相关性表明，胶体有机物质参与了这一元素的迁移。Ni、Cd与有机质的相关性主要出现在真溶态，说明真溶态有机C对这两种元素具有重要意义。对从罗纳河向地中海西北部输送的真正溶解和胶体有机碳和微量金属通量进行了估计。
The distribution of organic C and trace elements (Cd, Cu, and Ni) between truly dissolved and colloidal phases was determined in May 1992, in order to better understand their behavior during estuarine mixing in the Rhône delta (France). Colloidal material (104Daltons-0.4 μm) was separated with an ultra-clean cross-flow filtration system. A considerable part of the organic C and trace metals studied, used to be considered to occur in the so-called “dissolved” pool, is associated with colloidal material. The significant correlation between colloidal organic C and colloidal Cu suggests an important involvement of colloidal organic material in the transport of this element. The correlation between Ni, Cd and organic matter mainly occurs in the truly dissolved fraction, suggesting that the truly dissolved organic C is important for these two elements. Truly dissolved and colloidal organic C and trace-metal fluxes transported from the River Rhône to the northwestern Mediterranean Sea were estimated.