Zinc Biosorption by Microbial Species for Biotreatment Processes

Copper Removal Mediated by Pseudomonas veronii 2E in Batch and Continuous Reactors

“…The parameters according to Langmuir model (Ks, qmax) were determined by the linear regression method and were compared to other reports as summarized in Table 1. Kd was similar to those obtained with the same microorganism with Cd(II) [34] and Aspergillus niger with Cu(II) [35], while higher values were obtained with P. veronii 2E with Zn(II) [32], Bacillus subtilis [19] and Pseudomonas putida with Cu(II) [36]. Copper biosorption kinetics assays.…”

“…Besides for Cu(II) 1 mM model effluent, maximal values were 79.7 (25 ºC) and 86.9 (32 °C) from M9 meanwhile 77.7% (25 ºC) and 81.6% (32 °C) from PYG. These values are higher than those reported in previous studies with Pseudomonas veronii 2E sorption (82.0 and 76.8% for Zn(II) and Cd(II), respectively) [31,32]. Cu(II) sorption by P. veronii 2E was even higher than the 60-70% observed at the same pH by Tsekova et al [35].…”

“…It is assumed that once the surface is covered, additional adsorbed species can still be accommodated, leaving no possible prediction of maximal monolayer adsorption. In other words, the Freundlich model does not consider the existence of a monolayer and a maximal adsorption capacity as the Langmuir model does [32].…”