TiO₂-Based Photocatalytic Treatment of Raw and Constructed-Wetland Pretreated Textile Wastewater

Table 1

Characteristics of untreated and pretreated textile wastewater, subjected to photocatalysis.

Parameter	Untreated sample			CW-pretreated sample
	Blue	Red	Black	Blue	Red	Black
Absorbance at max intensity in Vis	0.88 at 592 nm	1.99 at 520 nm	3.1 at 598 nm	0.55 at 592 nm	0.99 at 520 nm	1.1 at 598 nm
COD [mg/L]	372	351	360	280	215	245
BOD [mg/L]	183	185	187	148	93	100
pH	8.1–8.2	8.1–8.2	8.1–8.2	~7.3	~7.3	~7.3
Toxicity [%]	84	100	100	73	100	100