Evaluation of Efficacy of Anionic Surfactant Degradation in the Presence of Concomitant Impurities of Natural Waters

Table 2

Effect of humic acid on reduction of ABS concentration and values of specific ozone consumption under oxidation of model solutions by various methods.

The content of model solution	Oxidation method	𝐶ABS, mg/dm^3		Δ𝐶ABS, %		𝐷oz/Δ𝐶ABS, mg/mg
		EPh	SPh	EPh	SPh	EPh	SPh
ABS (𝐶0—5 mg/dm^3)	—	5.43	5.06	—	—	—	—
	O3	4.35	4.45	20	25	2.4	4.3
	O3/UV	0.68	0.64	87	87	2.5	2.7
	O3/TiO2/UV	0.34	0.27	94	95	2.0	2.1
	O2/TiO2/UV	0.49	0.41	91	92	—	—
ABS (𝐶0—5 mg/dm^3); + HA (𝐶0—10 mg/dm^3); (fresh)	—	4.90	5.20	—	—	—	—
	O3	3.35	3.45	32	34	5.2	4.6
	O3/UV	0.60	0.75	88	86	2.7	2.6
	O3/TiO2/UV	0.40	0.29	92	94	2.2	2.0
	O2/TiO2/UV	0.55	0.36	89	93	—	—
ABS (𝐶0—5 mg/dm^3); + HA (𝐶0—10 mg/dm^3); (storage over 14 days)	—	2.18	4.85	—	—	—	—
	O3	1.06	3.3	51	32	6.4	4.6
	O3/UV	0.28	0.61	87	87	6.5	2.9
	O3/TiO2/UV	0.46	0.48	79	90	6.6	2.6
	O2/TiO2/UV	0.28	0.51	87	89	—	—

Note: Duration of treatment (t)—20 min, 𝑣_oz = 0.8 mg/(dm³·min), 𝐼_UV = 5.2 mW/cm², 𝑇 = 18 ± 1°C.