Tolerance of Chemoorganotrophic Bioleaching Microorganisms to Heavy Metal and Alkaline Stresses

Figure 8

Growth of Aspergillus niger determined by spread plate colony counting (a) and evolution of pH (b) over incubation time in blank potato dextrose broth medium and in the presence of 100 ppm Cd(II) (0.9 mM).

(a)

(b)