Research Article

Photo-Fenton and Fenton Oxidation of Recalcitrant Industrial Wastewater Using Nanoscale Zero-Valent Iron

Table 3

Dosing modes (the way the H2O2 and nZVI were added during the runs).

Sample number*Total amount of H2O2 (g/L)Total amount of nZVI (g/L)Number of equal doses0 min40 min60 min80 min120 min
H2O2 (g/L)nZVI (g/L)H2O2 (g/L)nZVI(g/L)H2O2 (g/L)nZVI (g/L)H2O2 (g/L)nZVI (g/L)

1.1; 2.1; 3.1; 4.124,81,7124,81,7
1.2; 2.2; 3.2; 4.29,90,719,90,7
1.3; 2.3; 3.3; 4.317,32,028,71,08,71,0
1.4; 2.4; 3.4; 4.417,32,028,71,08,71,0
1.5; 2.5; 3.5; 4.59,90,733,30,23,30,23,30,2
1.6; 2.6; 3.6; 4.69,95,033,31,73,31,73,31,7Full treatment time
1.7; 2.7; 3,7; 4.717,32,028,71,08,71,0
1.8; 2.8; 3.8; 4.824,81,738,30,68,30,68,30,6
1.9; 2.9; 3.9; 4.924,812,438,34,18,34,18,34,1
1.10; 2.10; 3.10; 4.1024,812,4124,812,4
1.11; 2.11; 3.11; 4.119,95,019,95,0

*Treatments from 1.1 to 1.11: dark-Fenton; from 2.1 to 2.11: Photo-Fenton.