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南极洲赖特谷万达盐湖中铬的垂直迁移

VERTICAL MIGRATION OF CHROMIUM IN VANDA SALINE LAKE OF WRIGHT VALLEY, ANTARCTICA

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【Author】 Yu Shengsong(Institute of Salt Lakes, Academia Sinica, Xining, 810008)W. J. Green(School of Interdisciplinary Studies, Miami University, Ohio, U.S.A.)G. A. Delanoy(Department of Chemistry, Miami University, Ohio, V.S.A.)

【机构】中国科学院盐湖研究所； School of Interdisciplinary studies Miami University； Ohio； U.S.A.； Department of Chemistry； Miami University； U.S.A. 西宁 810008；

【摘要】南极洲万达湖湖水上部为氧化环境,铬浓度较低,Cr⁶⁺占主导地位,主要以CrO₄^2-形式存在;下部为还原环境,铬浓度高,Cr³⁺为主,以Cr（OH）₂⁺和Cr（OH）²⁺形式存在。湖水中锰、铁的氧化物及氢氧化物颗粒对铬离子的吸附和释放过程,控制了湖水铬浓度的变化。更多还原

【Abstract】 Vanda Lake is located in Wright Valley of Antarctica, it is a saline lake with typical dimictic calcium chloride. This paper discusses the vertical geochemical distribution of chromium concentration. In Vanda Lake water, chromium exists in two valence states: Cr6+ and Cr3+. In oxygenated fresh lake water, chromium concentration is low and Cr6+ concentration predominates, and chromium exists in CrO42- form. In reduced brine, chromium concentration is high and Cr3+ concentration predominates and chromium exists in Cr(OH)2+ and Cr(OH)2+ form. The important role of sinking particles in the vertical migration of chromium in lake-water is discussed.更多还原

【关键词】南极洲；万达湖；悬浮物；迁移；
【Key words】 Antarctica； Vanda Lake； Sinking particles； Migration.；

【基金】美国科学基金会(NSF)资助

【文献出处】海洋与湖沼 ,Oceanologia Et Limnologia Sinica , 编辑部邮箱 ,1992年06期

【被引频次】2
【下载频次】26

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