Elevated Concentrations of Actinides in Mono Lake
Elevated Concentrations of Actinides in Mono Lake
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DOI：
10.1126/science.216.4545.514
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发表时间：
1982-04
期刊：
影响因子：
56.9
通讯作者：
R. Anderson;M. Bacon;P. Brewer
中科院分区：
文献类型：
--
作者：
R. Anderson;M. Bacon;P. Brewer
在加州中东部的一个盐碱湖莫诺湖中，四价钍、五价钚、六价铀和钚（氧化态不确定）的浓度比海水中的浓度高得多。低比例的锕，钚和镅的三价锕系元素的浓度没有类似的提高。通常非常难溶的锕系元素的高浓度是通过天然配体而保持在溶液中的，天然配体抑制了它们从水柱中的化学去除，而不是通过异常大的供应率。
Tetravalent thorium, pentavalent protactinium, hexavalent uranium, and plutonium (oxidation state uncertain) are present in much higher concentrations in Mono Lake, a saline, alkaline lake in eastern central California, than in seawater. Low ratios of actinium to protactinium and of americium to plutonium indicate that the concentrations of trivalent actinides are not similarly enhanced. The elevated concentrations of the ordinarily very insoluble actinides are maintained in solution by natural ligands, which inhibit their chemical removal from the water column, rather than by an unusually large rate of supply.