Modeling geochemical reactive transport of concentrated aqeous
solutions in variably saturated media
Guoxiang Zhang, Zuoping Zheng, and Jiamin Wan
Contact: Guoxiang Zhang, 510/486-4980, GXZhang@lbl.gov
Research Objectives
Concentrated aqueous solutions (CAS) are generally considered
as solutions with ionic strength larger than 1 M, and can be more
than 10 M. CAS occur in many natural and contaminated environments,
such as in the leakage of highly concentrated NaNO3 electrolytes
stored at DOE’s Hanford site. The main objectives in this
paper are (1) to develop a model that can simulate the coupled geochemical
and transport processes of CAS by developing a Pitzer ion–interaction
module and incorporating it into a previously developed computer
code, BIO-CORE2D©, (2) to verify the developed module
and the implementation into BIO-CORE2D©, and (3)
to validate the developed model through simulating laboratory experiments.
To continue reading more about this project, view
the 1-page pdf here.
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 Simulated pH and measured pH of the effluent fluid during the injection of a highly alkaline-saline solution into a column filled with unsaturated sediments from the Handford Site
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