Table 9.
Vertical variations of major, minor and trace elements concentrations in fallen dust samples in Elmamlaha Village in May 2000
| Floors | Fallen dust (g/(m2×month)) | Concentration |
||||||||||
| SiO2 (%) | Al2O3 (%) | Fe2O3 (%) | CaO (%) | MgO (%) | K2O (%) | Na2O (%) | Mn (×10−6) | Pb (×10−6) | Ni (×10−6) | Co (×10−6) | ||
| 1 | 10.60 | 92.7 | 0.80 | 1.20 | 0.48 | 0.85 | 0.55 | 0.35 | 527.70 | BD | 28.7 | BD |
| 2 | 10.59 | 93.0 | 0.80 | 1.00 | 0.50 | 0.90 | 0.60 | 0.48 | 538.80 | BD | 25.6 | BD |
| 3 | 11.10 | 93.6 | 0.80 | 0.80 | 0.48 | 0.95 | 0.50 | 0.45 | 550.20 | BD | 35.7 | BD |
| 4 | 10.86 | 93.3 | 0.85 | 0.70 | 0.43 | 0.85 | 0.63 | 0.43 | 495.20 | BD | 21.7 | BD |
| 5 | 10.59 | 92.8 | 0.73 | 0.55 | 0.40 | 0.70 | 0.55 | 0.40 | 480.66 | BD | 22.1 | BD |
| 6 | 10.30 | 92.5 | 0.75 | 0.45 | 0.38 | 0.65 | 0.50 | 0.43 | 453.40 | BD | 18.9 | BD |
| Mean | 10.70 | 93.0 | 0.80 | 0.78 | 0.45 | 0.81 | 0.55 | 0.42 | 506.70 | BD | 25.5 | BD |
BD: Below detection limit