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<br />I <br />0.9 <br />0.8 <br />0.7 <br />Selenate <br />0.6 <br />c. 0.5 <br />0.4 <br />0.3 <br />0.2 <br />0.1 <br />PH <br />Figure 3 - Selenate speciation as a function of pH (alpha is the fraction of the total <br />• dissolved selenate consisting of the given species). <br />Figure 4 is an Eh-pH diagram, which shows the stability fields for the different aqueous <br />species of selenium. Dote that the boundary lines between fields represent the point <br />where each species represents 50 of the total. <br />11 <br />0 <br />0 2 4 6 8 10 12 14