Positively charged suspended particles: Studies in an iron-rich river and its estuary'
Positively charged suspended particles: Studies in an iron-rich river and its estuary'
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带正电的悬浮颗粒：对富含铁的河流及其河口的研究”
DOI：
10.4319/lo.1987.32.6.1267
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发表时间：
1987
影响因子：
4.5
通讯作者：
P. Liss
中科院分区：
文献类型：
--
作者：
P. Newton;P. Liss
淡水、海洋和河口表层水中悬浮的天然颗粒通常表现出很小范围的负电泳迁移率。测得的迁移率被认为是由有机涂层和氧化物表面涂层控制的BC，有相当多的证据表明是由有机涂层控制的。在这里，我们提出的结果表明，氧化物-氢氧化物涂层可以控制在酸性矿山废水的河流中发现的条件下的流动性，但有机涂层，当存在时，承担着整体的流动性控制。电泳法测量表明，带正电荷的河流颗粒在河口水域中获得的正电荷较少，然后是负电荷。在河流中和低盐度时，水的酸碱度会影响生物的流动性。在较高的盐度下，氧化物-氢氧化物的性质不那么明显，颗粒呈现出自然水中通常存在的负迁移率，并归因于有机表面涂层。
Natural particles in suspension in fresh, marine, and estuarine surface waters generally display a narrow range of negative electrophoretic mobilities. The measured mobilities are thought to bc controlled by organic and oxide surface coatings, and there is considerable evidence for control by the organic coatings. Here we present results which indicate that oxide-hydroxide coatings can control the mobility under conditions found in a river fed by acid-mine drainage, but that organic coatings, when present, assume overall mobility control. Electrophoretic measurements show positivcly charged river particles acquiring less positive and then negative charges in estuarine waters. In the river and at low salinities mobility is affected by the pH of the water. At higher salinities the oxide-hydroxide character is less evident, and particles assume the negative mobilities normally found in natural waters and attributed to organic surface coatings.