Fig. 5. Effect of Co sorption under different physicochemical conditions on copper speciation (%) in paper mill (Eerbeek) (A) and distillery (Nedalco) (B) granules. For denomination of sorption conditions, see Fig. 3. I, inoculum. From top to bottom, bars represent the following fractions: soluble, exchangeable, carbonates, organic matter + sulfides, and residual.