Kinetic metal release from competing processes in aquifers

Environmental Science & Technology
Lindsay A BearupJohn E McCray

Abstract

Understanding groundwater time scales wherein kinetic metal-desorption and mineral-dissolution are important mechanisms is essential for realistic modeling of metal release. In this study, release rate constants were compiled and the Damköhler number was applied to calculate residence times where kinetic formulations are relevant. Desorption rate constants were compiled for arsenic, barium, cadmium, copper, lead, mercury, nickel, and zinc, and span 6 orders of magnitude, while mineral-dissolution rate constants compiled for calcite, kaolinite, smectite, anorthite, albite, K-feldspar, muscovite, quartz, goethite, and galena ranged over 13 orders of magnitude. This Damköhler analysis demonstrated that metal-desorption kinetics are potentially influential at residence times up to about two years, depending on the metal and groundwater conditions. Kinetic mineral-dissolution should be considered for nearly all residence times relevant to groundwater modeling, provided the rate, solubility, and availability of the mineral generates a non-negligible concentration. Geochemical models of competitive desorption and dissolution for an illustrative metal demonstrate total metal concentrations may be sensitive to dissolution rate variation...Continue Reading

References

Mar 29, 2002·Environmental Science & Technology·Robert L Runkel, Briant A Kimball
Apr 12, 2005·Environmental Science & Technology·H ErnstbergerW Davison
Jul 29, 2005·Environmental Science & Technology·Zhenqing ShiAlexander A Ponizovsky
Mar 29, 2006·Environmental Toxicology and Chemistry·Hao ZhangScott D Young
Jul 21, 2006·The Journal of Physical Chemistry. B·Antonio C Lasaga, Andreas Lüttge
Aug 30, 2008·Environmental Science & Technology·Zhenqing ShiDonald L Sparks
Dec 23, 2008·Environmental Geochemistry and Health·E Smith, R Naidu
Oct 28, 2010·Environmental Science & Technology·Mark G Little, Robert B Jackson

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Citations

Apr 27, 2013·Environmental Science & Technology·Adam L AtchleyAlexis K Navarre-Sitchler
Mar 19, 2014·Environmental Science & Technology·Katerina TerziChristos D Tsakiroglou
Aug 25, 2020·Environmental Science and Pollution Research International·Vahab AmiriJavad Mansoori
Jan 15, 2014·Environmental Science & Technology·Katie KirschJohn E McCray

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