Renovation and Reuse of Reactive Dyeing Effluent by a Novel Heterogeneous Fenton System Based on Metal Modified PTFE Fibrous Catalyst/H₂O₂

Table 1

Effect of Cu/Fe ratio on decoloration of three reactive dyes.

Samples	Metal content (mmol L^−1)			Cu/Fe	𝐷180%
	𝑄Fe	𝑄Cu	Total		RR195	RY145	RB222
Fe-PAA-g-PTFE	1.89	0.00	1.89	0	47.31	45.67	43.75
Cu-Fe-PAA-g-PTFE (i)	1.13	0.75	1.88	0.66	61.22	58.80	57.93
Cu-Fe-PAA-g-PTFE (ii)	0.54	1.55	2.09	2.87	84.65	79.18	78.55
Cu-Fe-PAA-g-PTFE (iii)	0.31	1.75	2.06	5.65	78.47	73.67	72.85
Cu-PAA-g-PTFE	0.00	1.98	1.98	/	51.90	45.79	44.86

[dye] = 0.05 mmol L⁻¹, [H₂O₂] = 6.0 mmol L⁻¹, catalyst = 5.0 g L⁻¹, pH = 6.