Tolerance of Chemoorganotrophic Bioleaching Microorganisms to Heavy Metal and Alkaline Stresses

Figure 5

Variation of pH during growth of Bacillus mucilaginosus in a blank nutrient broth medium and under metal stress from 100 ppm Cd(II) (0.9 mM), As(III) (1.3 mM), or Ni(II) (1.7 mM) additions.