Statistical Optimization of Bioleaching for Simultaneous Recovery of Cu, Sn, Pb, and Zn from Computer-Printed Circuit Boards

Figure 1

Schematic diagrams of primary raw PCBs into stepwise size reduction under the various mechanical operations and metal composition analysis performed by SEM with EDAX (reproduced from Murugesan et al., [31] under https://creativecommons.org/licenses/by/4.0).