Fig. 4From: Hyperproduction of extracellular polymeric substance in Pseudomonas fluorescens for efficient chromium (VI) absorptionEffect of pH on the removal of the Cr (VI) and the corresponding zeta potential of EPS (A), species of H2CrO4, HCrO4−, Cr2O72− and CrO42− at different pH, C0 = 50.0 mg/L, T = 298 K (B)Back to article page