Table 11 Oxygen consumption rates and percentage inhibition values in the definitive ASRIT test after 3-h contact time
Nominal concentration (mg/l) | Initial O2 reading (mg O2/l) | Measurement period (minutes) | Final O2 reading (mg O2/l) | O2 consumption rates (mg O2/l/min) | % inhibition |
|---|---|---|---|---|---|
Control: | |||||
R1 | 6.9 | 10 | 2.9 | 0.40 | - |
R2 | 6.6 | 10 | 2.4 | 0.42 | - |
R3 | 6.9 | 10 | 2.8 | 0.41 | - |
R4 | 6.3 | 8 | 3.0 | 0.41 | - |
Nano cerium oxide: | |||||
1000 R1 | 6.7 | 10 | 2.5 | 0.42 | [2] |
1000 R2 | 6.8 | 10 | 2.8 | 0.40 | 2 |
1000 R3 | 6.5 | 9 | 2.9 | 0.40 | 2 |
Non-nano cerium oxide: | |||||
1000 R1 | 6.7 | 9 | 3.0 | 0.41 | 0 |
1000 R2 | 6.7 | 10 | 2.6 | 0.41 | 0 |
1000 R3 | 6.8 | 10 | 2.8 | 0.40 | 2 |
3,5-dichlorophenol (Reference material): | |||||
a) 3.2 | 7.3 | 10 | 4.4 | 0.29 | 29 |
b) 10 | 7.5 | 10 | 5.7 | 0.18 | 56 |
c) 32 | 8.2 | 10 | 7.4 | 0.08 | 80 |
d) 3.2 | 7.1 | 10 | 4.2 | 0.29 | 29 |
e) 10 | 7.7 | 10 | 6.0 | 0.17 | 59 |
f) 32 | 8.2 | 10 | 7.5 | 0.07 | 83 |