KDanny Posted August 5, 2015 Share Posted August 5, 2015 Hello, I’m trying to model precipitation of the uranium-bearing mineral, Swartzite (CaMg(UO2)(CO3)3•12(H2O)), from solution. When I equilibrate my ground water chemistry of interest using REACT and X1T, Swartzite is the only uranium-bearing mineral to be supersaturated (SI>0 [sI=0.45]). I’m using an updated thermodynamic database, that includes uranium data determined after the discovery of Ca2UO2(CO3)30 CaUO2(CO3)3-2and MgUO2(CO3)3-2 complexes by Bernhard in 1996. I can’t find appropriate kinetic rate constants for the precipitation and dissolution of Swartzite to include in my REACT and X1T models. I plan to include rate constants of an alternate uranium-bearing mineral in place of Swartzite, such as Schoepite or Rutherfordine if no data are available. However, such substitution will render my output a gross approximation. Has anyone determined or located reliable kinetic rate constants for Swartzite while modeling uranium mineral saturation? Has anyone been unable to find kinetic rate constants for a mineral, and ended up substituting in a similar mineral? Any help would be useful. Thanks. GWB_U_02172012.dat Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.