Science. 1988 Apr 29;240(4852):637-40. doi: 10.1126/science.240.4852.637.
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.
在科罗拉多州的一条接受酸性矿山排水的山间小溪中，铁的光还原导致溶解亚铁在白天显著增加。为了量化这一过程，在溪流中注入了一种保守示踪剂，以测量每个样品采集时的流量。光还原产生的亚铁白天的产量几乎是夜间亚铁氧化的四倍。光还原过程可能涉及溶解或胶体铁物种，与有机物种的相互作用有限，因为该溪流中有机碳的浓度较低。
