铁质
三价铁
铁
环境化学
化学
溶解有机碳
胶体
环境科学
无机化学
有机化学
作者
Diane M. McKnight,Briant A. Kimball,Kenneth E. Bencala
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:1988-04-29
卷期号:240 (4852): 637-640
被引量:247
标识
DOI:10.1126/science.240.4852.637
摘要
In a small mountain stream in Colorado that receives acidic mine drainage, photoreduction of ferric iron results in a well-defined increase in dissolved ferrous iron during the day. To quantify this process, an instream injection of a conservative tracer was used to measure discharge at the time that each sample was collected. Daytime production of ferrous iron by photoreduction was almost four times as great as nighttime oxidation of ferrous iron. The photoreduction process probably involves dissolved or colloidal ferric iron species and limited interaction with organic species because concentrations of organic carbon are low in this stream.
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