Table 12.
Pearson's correlation matrix between heavy metals in sludge and wastewater of HIE.
| Heavy metals in sludge | Heavy metals in wastewater |
||||
|---|---|---|---|---|---|
| Cd | Cr | Pb | Zn | ||
| Cd | Pearson Correlation | 0.447 | 0.489 | 0.745 | 0.521 |
| Sig. (2-tailed) | 0.45 | 0.404 | 0.148 | 0.368 | |
| N | 5 | 5 | 5 | 5 | |
| Cr | Pearson Correlation | 0.158 | 0.348 | .879* | .895* |
| Sig. (2-tailed) | 0.8 | 0.566 | 0.05 | 0.04 | |
| N | 5 | 5 | 5 | 5 | |
| Pb | Pearson Correlation | 0 | −0.268 | −0.118 | −0.272 |
| Sig. (2-tailed) | 1 | 0.663 | 0.85 | 0.658 | |
| N | 5 | 5 | 5 | 5 | |
| Zn | Pearson Correlation | 0.259 | 0.006 | 0.007 | −0.276 |
| Sig. (2-tailed) | 0.674 | 0.992 | 0.992 | 0.653 | |
| N | 5 | 5 | 5 | 5 | |
*. Correlation is significant at the 0.05 level (2-tailed).