Fig. 19

Reusability of CCK–CNF–Fe cryogel beads over six adsorption–desorption cycles for MB removal (C₀ = 150 mg L⁻¹, pH = 7, dose = 50 mg, T = 298 K, regeneration in 0.1 M HCl).

Reusability of CCK–CNF–Fe cryogel beads over six adsorption–desorption cycles for MB removal (C₀ = 150 mg L⁻¹, pH = 7, dose = 50 mg, T = 298 K, regeneration in 0.1 M HCl).