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Date:
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29.09.2014 - 02.10.2014 |
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National/International:
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International |
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Language:
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English/German |
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Type:
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Training course |
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Location:
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University of Bayreuth |
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Conference web site at:
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After a short introduction to the program PhreeqC and
existing data bases simple thermodynamic equilibrium reactions between
aqueous, gaseous, and solid phases will be the focus. This will
demonstrate how changes in environmental conditions affect the
composition of natural waters, the distribution of redoxsensitive
species and the saturation with regard to certain gas or mineral phases
by dissolution and/or precipitation. Drinking water treatment using open
and closed aeration, addition of limestone or mixing of different types
of waters will be modeled as well as processes of groundwater
rehabilitation, e.g. nitrate reduction by addition of methanol, the
determination of the half life of reactive iron barriers, or carbonate
buffering of acidic groundwaters. Finally, we will turn to more complex
examples, considering kinetic processes and reactive transport, e.g.
tritium degradation in the unsaturated zone, sorption in a lysimeter,
surface complexation of arsenic on iron hydroxides and regeneration of a
double porosity aquifer in a former uranium in-situ leaching mine (with
WPhast). All exercises will be introduced with some theoretical
background and hints for their realization in PhreeqC; afterwards all
participants can work on their own computer with fulltime individual
supervision.
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