Research Article

Tea Stem as a Sorbent for Removal of Methylene Blue from Aqueous Phase

Figure 9

Regeneration of tea stem powder: (a) removal efficiency of MB adsorption for 5 cycles and (b) color of MB solutions before and after tea stem adsorption (C = 300 mg/L; RM = 4 g/L; temp. = 298 K; time = 60 min; pH = 5.00).
(a)
(b)