Hi Dave: I have downloaded PhreeqcI (220.127.116.11). I have set it up on my computer and it is working. I am interested in doing simulations related to Fe and As surface complexation and exchange. As a starting point I am trying to reproduce some of the work that Appelo et al (1999, Groundwater, v. 37, no. 6, p.811, Modeling IN Situ Iron Removal from Groundwater) did with Phreeqc. I am going to try and use the input files he has given in the Appendix to the paper. When I start up PhreeqcI it provides menus for defining the initial solutions and surface species. However when I get to the SOLUTION_SPECIES, SURFACE_SPECIES, and related master species there are no such menus from which to choose. Is this the way it is supposed to be? If this is the way it is supposed to be then I gather that the rest of the simulation instructions given in the appendix to this paper need to be hand typed into the input file using the formats provided in the instruction manual? To fill in the information for SOLUTION_SPECIES and SURFACE_SPECIES, I guess I have to examine the actual databases I will be using (i.e., wateq4f, phreeqc, etc) to be sure I use the appropriate designations. If these seem like very basic questions I am sorry, It has been a while since I used the PHREEQC model and I am trying to get into it again. As you can see I am a little confused. I think my confusion is stemming from the fact that I assumed the interactive version would eliminate the need for actually typing in the line by line code for some of the more sophisticated aspects of the modeling. This assumption has apparently clouded my thinking and if you could provide some clarification I would appreciate it. Thanks again for your help!! Dave David C. Gosselin, Ph.D. Associate Professor SNRS/CSD/NESEN 113 Nebraska Hall University of Nebraska-Lincoln Lincoln, NE 68588-0517 dgosselin2@xxxxxxx 402-472-8919 (office) 402-472-4608 (fax)
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