Diel variation in element concentrations, Peru Creek, Summit County, Colorado

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• 作者：Sullivan ; Annett B. ; Drever ; James I. ; McKnight ; Diane M.
• 关键词：mine drainage ; geochemical cycle ; photochemistry ; hydrochemistry
• 刊名：Journal of Geochemical Exploration
• 出版年：1998
• 出版时间：November, 1998
• 年：1998
• 卷：64
• 期：1-3
• 页码：141-145
• 全文大小：281 K

文摘

Two diel samplings, in early July and mid-August, and one along-stream sampling, in late July, were completed at Peru Creek, a mountain stream affected by acid mine drainage. Three different processes were found to control diel cycling of element concentrations. The concentrations of SO^2−₄, Mn, Zn, Si, Mg, K and Ca were primarily controlled by hydrology, particularly melting of snow. Diel Fe cycles were produced by photochemical reduction of Fe(III) species and reoxidation during the night. Nitrate cycling was controlled by its uptake by instream vegetation during daylight hours.