Aggregation and Dispersion Behaviours of Riverine Trace Metals (Fe, Al, V, Mn, Ni, and Zn) and Organic Matter in Freshwater and Estuarine Conditions: A case study in Shira and Midori Rivers, Kumamoto, Japan
Aggregation and Dispersion Behaviours of Riverine Trace Metals (Fe, Al, V, Mn, Ni, and Zn) and Organic Matter in Freshwater and Estuarine Conditions: A case study in Shira and Midori Rivers, Kumamoto, Japan
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淡水和河口条件下河流微量金属（Fe、Al、V、Mn、Ni 和 Zn）和有机物的聚集和分散行为：以日本熊本市 Shira 河和 Midori 河为例
DOI：
10.1007/s10498-022-09408-7
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发表时间：
2022
影响因子：
1.6
通讯作者：
Kawagoshi Yasunori
中科院分区：
文献类型：
--
作者：
Ito Hiroaki;Tsurumaki Shinya;Hama Takehide;Ishida Kei;Watanabe Tsugihiro;van Duc Luong;Kawagoshi Yasunori
金属和有机质的聚集和分散是影响其迁移和生物有效性的重要形态变化过程。然而，由于自然系统中的可变相互作用系统，可以观察到某些物质（例如Mn和Cu）的可变混合行为。本研究以日本熊本白罗河和绿河的河水为研究对象，研究了人工海水中微量金属元素（Fe、Al、Mn、Zn、Cu、V和Ni）和有机物的聚集和分散行为。特别是，他们的相互作用进行了检查，区分快速和缓慢的转换，并考虑到悬浮物质的影响。顺序过程的比较，包括海水混合，滗析，离心，和多重过滤，说明了聚集和分散的金属和有机物的特性如下。铁在河口系统中具有明显的聚集性。此外，河流悬浮物加速了Fe的缓慢聚集。小Fe（氧）氢氧化物颗粒溶解铁在淡水和河口系统的主要形式，并与其他金属部分相关。相比之下，锌和镍的特点是强大的分散性能，虽然它可以再吸收到河口系统中的悬浮物质。同步行为与锌和镍观察V，铜，有机物在绿河。Mn在悬浮物上的吸附在淡水系统中而不是河口系统中是明显的。同时，Mn的行为已知取决于其在悬浮形式中的丰度、其氧化还原状态以及Fe的影响。V和Cu本质上是非保守的，受到Fe、Zn和Ni等其他金属的影响。铝，其行为在很大程度上取决于目标河口，这也受到其他金属。快速转化产生的悬浮物诱导有机物缓慢聚集。此外，悬浮物和溶解物之间存在明显的相互作用，Fe、Zn、Ni和有机质的行为也表明，河口混合初期的沉积和分散会影响到真实的环境中随后的缓慢转化.
The aggregation and dispersion of metals and organic matter are an important morphological alteration process for their transportation and bioavailability in coastal areas. However, variable mixing behaviours can be observed for some substances (e.g. Mn and Cu) due to the variable interaction systems in natural systems. In this study, riverine freshwater in the Shira and Midori rivers, Kumamoto, Japan, was mixed with artificial seawater to investigate the aggregation and dispersion behaviours of trace metals (i.e. Fe, Al, Mn, Zn, Cu, V, and Ni) and organic matter. In particular, their interactions were examined with differentiating the fast and slow transformations and considering the effects of suspended substances. Comparisons of sequential processes, including seawater mixing, decantation, centrifugation, and multiple filtrations, illustrated the aggregation and dispersion characteristics of the metals and organic matter as follows. A strong aggregating nature was evident for Fe in estuarine systems. In addition, the slow aggregation of Fe was accelerated by river-borne suspended substances. Small Fe (oxy)hydroxide particles were the major forms of dissolved Fe in both freshwater and estuarine systems and were partly associated with the other metals. In contrast, Zn and Ni were characterised by strong dispersion properties, although it can resorb onto suspended substances in estuarine systems. Synchronous behaviours with Zn and Ni were observed for V, Cu, and organic matter in the Midori River. The adsorption of Mn onto suspended substances was evident in the freshwater systems instead of the estuarine systems. Meanwhile, the behaviour of Mn is known to be dependent on its abundance in suspended forms, its redox state, and the influence of Fe. V and Cu, which are non-conservative in nature, were affected by other metals such as Fe, Zn, and Ni. Al, whose behaviour is largely dependent on the target estuary, which was also affected by other metals. Slow aggregation of organic matter was induced by suspended substances which were produced by fast transformation. In addition, evident interactions between suspended and dissolved substances were observed with the behaviours of Fe, Zn, Ni, and organic matter, indicating that the deposition and dispersion at the early stage of estuarine mixing can influence the subsequent slow transformation in real environments.
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影响因子：
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作者：
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天然有机物 (NOM) 沿河口盐度梯度变化的紫外-可见光和荧光光谱证据
DOI：
10.1007/bf02803386
发表时间：
2004
期刊：
Estuaries
影响因子：
--
作者：
J. Alberts;M. Takács;J. Schalles
通讯作者：
J. Schalles
DOI：
--
发表时间：
1985
期刊：
--
影响因子：
--
作者：
植木 肇;水谷 範子;西田 浪子;幸人 太田原
通讯作者：
幸人 太田原
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影响因子：
5
作者：
K. Hunter;Margaret Leonard
通讯作者：
Margaret Leonard