SEARCH Articles Figures Tables E 2-pH diagrams showing predominance fields of aqueous species and minerals at 25 C. Iron species and minerals are shown in . The boundaries of the fields were drawn for a total dissolved Fe concentration of 0.01 ppm, a total dissolved carbon concentration of 10 ppm, a total sulfur concentration of 10 ppm, and a total dissolved uranium concentration of 0.001 ppm. [Publishers Imprint]