JKullmann

Hi - I am looking to develop an Eh-pH diagram for lead speciation based on chloride, sulfate, and alkalinity (CaCO3). I have attached my GSS spreadsheet with the data for my site (as well as activities for the ionic species generated from SpecE8) and Act2 plotting file where I have been working to develop the speciation diagram. Our hypothesis is that based on the geochemistry of the site, our species should be mostly Pb2+ and anglesite, but so far I have only been able to get anglesite/galena OR Pb2+/galena on the plot (see the PDFs for these plots). I think that I need to adjust the activities of my ionic species (Pb and/or basis species) in some way, but I haven't been able to figure out that component of the model. If anyone has any thoughts or suggestions, I would really appreciate them. Thanks! GWB_Lead2.ac2 GWB_Lead.gss Pb_anglesite_Eh_pH.pdf PbCl_Eh_pH.pdf Pb_Eh_pH_3.pdf