Geochemical modeling of changes in shallow groundwater chemistry observed during the MSU-ZERT CO2 injection experiment - Zheng, Liange; Apps, J.; Spycher, N.; Birkholzer, J.; Kharaka, Yousif; Thordsen, James J.; Beers, Sarah; Herkelrath, William; Kakouros, Evangelos; Trautz, Robert (International Journal of Greenhouse Gas Control, 2012)