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

Table 2

Characteristics of raw and decolorized dyeing wastewater.

Numbers of; recycling processes	Parameters	Raw wastewater	Treated wastewater	Removal %
First	pH	8.48	6.22	/
	Color (Abs)	0.502	0.008	98.41
	Conductivity (mscm^−1)	21.91	22.87	−4.38
	TOC (mg L^−1)	92.97	22.88	75.38
Second	pH	8.61	6.09	/
	Color (Abs)	0.522	0.009	98.27
	Conductivity (mscm^−1)	23.55	25.19	−6.96
	TOC (mg L^−1)	104.2	38.02	63.51
Third	pH	8.78	7.02	/
	Color (Abs)	0.533	0.010	98.12
	Conductivity (mscm^−1)	25.18	27.09	−7.60
	TOC (mg L^−1)	112.1	47.74	57.41
Fourth	pH	8.52	7.34	/
	Color (Abs)	0.538	0.011	97.95
	Conductivity (mscm^−1)	29.35	32.38	−10.32
	TOC (mg L^−1)	126.1	69.09	45.22

The absorbance (Abs) at 500 nm is used to evaluate the color of real dyeing effluent. Color removal % equals 𝐷% value for real dyeing effluent.