Presentation on theme: "A NALYSIS AND SIMULATION OF REACTIVE TRANSPORT OF METAL CONTAMINANTS IN GROUND WATER IN THE P INAL C REEK B ASIN, A RIZONA Dan Portlock Environmental Engineering."— Presentation transcript:
A NALYSIS AND SIMULATION OF REACTIVE TRANSPORT OF METAL CONTAMINANTS IN GROUND WATER IN THE P INAL C REEK B ASIN, A RIZONA Dan Portlock Environmental Engineering NDSU Geol 628 Geochemistry 12/1/10
Introduction Background information on Pinal Creek mining Background information on Advection and Transport Modeling Advection and Transport Modeling using Phreeqc Compare current and present modeling Conclusion
I NTRODUCTION Large scale mining activities generated a plume of acidic ground water more than 15 km long in the aquifer of the Pinal Creek Basin In 1984, the acidic part of the plume had a pH as low as 3.4 and contained milligram-per- liter concentrations of iron, copper, aluminum and other metals. Contaminant sources include mine tailings, heap-leach areas, surface impoundments of water associated with mining processes and occasional spills of contaminated water into streambeds.
C ONCLUSIONS The advection model is a quick and simple method for analyzing the transport of metals or other contaminants in a system -It does not account for the distance traveled or the reaction that occurs which could lead to problems when analyzing a more complex system. The transport model includes dispersion and reaction time which will provide a more detailed analysis of a system. -The parameters in the transport model are sometimes hard to estimate which could lead to errors.
R EFERENCES Brown, James., Analysis and simulation of reactive transport of metal contaminants in ground water in Pinal Creek Basin, Arizona 1997. Journal of Hydrology 209, 225- 250. Brown, J.G., Eychaner, J.H., 1996. Research of acidic contamination of ground water and surface water, Pinal Creek Basin, Arizona. In: J.G. Brown and B.O. Favor, (Editors), Hydrology and geochemistry of aquifer and stream contamination related to acidic water in Pinal Creek Basin near Globe, Arizona. US Geological Survey Water-Supply Paper 2466, pp. 1–20.