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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Laboratory experiments on river-estuary geonanomaterials
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Laboratory experiments on river-estuary geonanomaterials

机译：河口土工材料的室内实验

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摘要

Estuaries represent the mixing or transition zone between fresh water (rivers) and saline water (sea) and form very complex systems, which play an important role in the biogeochemical cycles of elements. In order to understand the processes that occur in this environment, laboratory experiments were carried out by mixing river water and seawater, and the resultant floccules or aggregates were studied. It was observed that colloidal flocculation took place, followed by restabilization of colloids until a steady state was obtained. This behaviour was reflected by the electrical conductivity (or dissolved components). The scanning electron microscope photomicrographs show the presence of flocculated clumps and particles less than 0.1 mu m in size. The electron probe micro-analyser analysis of the mixed water floccules show them to be enriched in Fe2O3 and MnO as compared to the river suspensions. The present study although preliminary, shows that flocculation is a significant process in the marginal marine environment and flocculation occurs within a few hours of mixing. Over long time scales, the mixing phenomenon may act as a significant process for removal of dissolved metals onto the flocculated particles.
机译：河口代表淡水（河流）和盐水（海水）之间的混合或过渡带，形成非常复杂的系统，在元素的生物地球化学循环中起着重要的作用。为了了解在这种环境下发生的过程，通过混合河水和海水进行了实验室实验，并对所得的絮凝物或聚集体进行了研究。观察到发生胶体絮凝，然后胶体再稳定化直至获得稳定状态。此行为通过电导率（或溶解的组分）反映出来。扫描电子显微镜显微照片显示存在絮凝的团块和尺寸小于0.1微米的颗粒。混合水絮凝物的电子探针微分析仪分析表明，与河流悬浮液相比，它们富含Fe2O3和MnO。本研究虽然是初步的，但表明絮凝在边缘海洋环境中是一个重要过程，絮凝发生在混合后数小时之内。在长时间范围内，混合现象可能是将溶解的金属去除到絮凝颗粒上的重要过程。

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