Unmodified SBA-15 silica exhibits outstanding capacity for gallium, while ligand-modified silica demonstrates efficient adsorption of indium. Both sorbents show high selectivity, with SBA-15 excelling at separating gallium from complex semiconductor-like solutions containing gallium, indium, and zinc. Meanwhile, the ligand-modified silica offers superior separation of indium from gallium and zinc. Their excellent reusability further highlights their potential for sustainable recovery in industrial applications.
