| Metal | Obiajunwa and Nwachukwa 2000 [29] | Ipinmoroti and Aiyesanmi 2001 [30] | Adebiyi and Omode 2007 [20] | Present study |
| Zn | 119.00 | 7.00 | 100.94 | 120.00 |
| Ni | NDT | 21.00 | 20.22 | 11.20 |
| Cu | 72.00 | BDL | ND | ND |
| Pb | 69 | 80.00 | 57.49 | 12.68 |
| V | NDT | 37.00 | 7.59 | 13.80 |
| Fe | 48,300.00 | 234.00 | 204.93 | 210.44 |
| Mn | 216.00 | NDT | 12.41 | 11.67 |