Research Article

Photodegradation of Rhodamine B Using the Microwave/UV/H2O2: Effect of Temperature

Figure 4

(a) Semilogarithmic plot of the absorbance of RhB solution (10.2 mg/L) at 554 nm versus time at various initial H2O2 concentrations, with W and °C (filled circles: 0 mg/L, filled diamonds: 50 mg/L, filled triangles: 200 mg/L, open triangles: 300 mg/L, crosses: 600 mg/L, open circles: 900 mg/L, and filled squares: 1800 mg/L). (b) Apparent rate constant of decoloration of RhB aqueous solution (10.2 mg/L) as a function of [H2O2]0, with  W and °C, obtained from data of (a).
854857.fig.004a
(a)
854857.fig.004b
(b)