Table 5 Average difference values from pollutants transaction at different trading levels
Unit \(\times 10^{ - 2}\) | CODe | CODa | CODd | Petro | NH3-N | VP | CN- | Cr | As | Pb | Cd | Hg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
\(\delta_{i}^{\text{I}}\) | 56.8 | 11.6 | 10.2 | 13.3 | 10.8 | 12.3 | 20.1 | 20.1 | 6.46 | 5.22 | 1.07 | 19.7 |
\(\delta_{i}^{{\text{II}}}\) | 25.1 | 14.5 | 19.3 | 13.9 | 16.2 | 8.46 | 8.67 | 10.1 | 11.1 | 10.6 | 7.62 | 16.4 |
\(\delta_{i}^{{\text{III}}}\) | 0 | 3.53 | 18.3 | 18.8 | 26.7 | 19.1 | 10.8 | 17.8 | 9.81 | 9.94 | 7.4 | 18.3 |
\(\delta_{i}^{{\text{IV}}}\) | 0 | 1.99 | 13.3 | 11.6 | 7.92 | 3.43 | 2.01 | 1.59 | 6.02 | 7.05 | 3.83 | 11.2 |
\(\delta_{i}^{\text{V}}\) | 0 | 0.43 | 13.5 | 6.96 | 3.72 | 0.99 | 0.7 | 0.43 | 1 | 1.37 | 0.46 | 2.06 |