Fig. 7

Elemental mapping analysis of the membrane surfaces during each step of the process: (a) clean membrane surface, (b) membrane surface with cake layer, (c) membrane surface after cake removal, and (d) membrane surface after backwashing.

Elemental mapping analysis of the membrane surfaces during each step of the process: (a) clean membrane surface, (b) membrane surface with cake layer, (c) membrane surface after cake removal, and (d) membrane surface after backwashing.