Dominating Role of Ionic Strength in the Sedimentation of Nano-TiO₂ in Aquatic Environments

Table 3

SE of n-TiO₂ based on the orthogonal experiment under different experimental conditions.

Number	Experimental conditions			SE (%)
	pH	IS (mM)	NOM (mg L^−1)
01	6.0	0.5	0.5	25.56
02	6.0	0.5	1.0	12.22
03	6.0	0.5	5.0	5.56
04	6.0	2.5	0.5	32.22
05	6.0	2.5	1.0	18.89
06	6.0	2.5	5.0	15.56
07	6.0	25	0.5	57.78
08	6.0	25	1.0	55.56
09	6.0	25	5.0	51.11
10	7.0	0.5	0.5	22.22
11	7.0	0.5	1.0	7.78
12	7.0	0.5	5.0	3.33
13	7.0	2.5	0.5	26.67
14	7.0	2.5	1.0	16.67
15	7.0	2.5	5.0	11.11
16	7.0	25	0.5	48.89
17	7.0	25	1.0	44.44
18	7.0	25	5.0	37.78
19	8.0	0.5	0.5	30.00
20	8.0	0.5	1.0	21.11
21	8.0	0.5	5.0	12.22
22	8.0	2.5	0.5	42.22
23	8.0	2.5	1.0	31.11
24	8.0	2.5	5.0	24.44
25	8.0	25	0.5	65.56
26	8.0	25	1.0	61.11
27	8.0	25	5.0	58.89