Passive Treatment of Acid-Mine Drainage with Vertical-Flow Systems C. Zipper, Extension Specialist, Crop and Soil Environmental Sciences, Virginia Tech; and C. Jage, Land Trust Representative, New Jersey Conservation Foundation, Far Hills, NJ Publication Number 460-133, Posted June 2001

Figure 4

Figure 4. Observed net alkalinity generation, and net alkalinity generation predicted by Equation 9, (mg/l as CaCO₃ - system averages) for 18 vertical flow cells. Performance data for the Oven Run and Howe Bridge systems were obtained from published literature (Watzlaf and others, 2000).

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