Kinetic Study of the Removal of Methyl Orange Dye by Coupling WO₃/H₂O₂

Table 1

Comparison of the efficiency and kinetic parameters of MO removal.

	(MO)	Catalyst	[H2O2]	pH	Yield	Order	R ^2	k (min^−1)	(Ref).
Photo-Fenton	30 mg·L^−1	Co-SMA 29.92 g L^−1	37 mM	4.3	94.79	First order		0.017	[37]
Fenton Fe^2+/H2O2	5.4 × 10^−5	(Fe^2+) = 1.9 × 10^−4	2.93 × 10^−3M	2.79	97.8	Second order	0.867	4.9273 × 10^4 M^−1	[19]
Photo-Fenton	2.5 ppm	αFe2O3 30 mg	30 μl	—	76.6	First order	0.969	0.0118	[16]
Photo-Fenton	100 mg·L^−1	Fe-Sand 1.5 g·L^−1	200 mg·L^−1	2.5	60	—	—	—	[18]
		Fe-Sand 1.5 g·L^−1 + UV	—		74
Heterogeneous-Fenton	50 mg·L^−1	Fe3O4/MWCNTs 2.9 g·L^−1	19.38 mmol/L	2	91.9	First order	—	—	[17]
Heterogeneous-Fenton	15 mg·L^−1	WO3 2.44 mg·L^−1	0.179 mM·L^−1	4	92.8	First order			Our work
	60 mg·L^−1	WO3 2.44 mg·L^−1	0.179 mM·L^−1		76.8	First order