Table 2.
Results of the scale sample analysis.
| Chemical substance | Scale sample (% by mass) | Calculated mass Concentration in drinking water sample (mg/dm3) | Mass concentration in drinking water sample obtained by AAS (mg/dm3) | Maximum allowed concentrations in drinking water (mg/dm3) [2] |
|---|---|---|---|---|
| Calcium, as CaO | 48.90 | 104.85 | – | 200 |
| Magnesium, as MgO | 5.43 | 9.82 | – | 50 |
| Sodium, as Na2O | 0.034 | 0.076 | 16.4 | 150 |
| Potassium, as K2O | 0.0072 | 0.02 | 1.6 | 12 |
| Iron, as Fe2O3 | 0.084 | 0.18 | 0.02 | 0.05 |
| Manganese, as MnO | 20 ppm | 6 μg/dm3 | 2 μg/dm3 | 0.05 |
| Silicon, as SiO2 | 1.14 | 1.60 | – | – |
| Aluminium, as Al2O3 | 0.07 | 0.11 | – | – |
| Lead, as Pb | 0.0033 | 9.9 μg/dm3 | 9 μg/dm3 | 0.01 |
| Zinc, as Zn | 0.023 | 0.07 | 0.04 | 3.0 |
| Copper, as Cu | 0.134 | 0.40 | 7 μg/dm3 | 2.0 |
| Strontium, as Sr | – | – | – | 2.0 |
| Uranium, as U | 2.03 ppm | 0.609 μg/dm3 | – | – |
| Nickel, as Ni | 20 ppm | 6 μg/dm3 | 5 μg/dm3 | 20 μg/dm3 |
| Cadmium, as Cd | 6 ppm | 1.8 μg/dm3 | 1 μg/dm3 | 5 μg/dm3 |
| Chromium, as Cr | 10 ppm | 3 μg/dm3 | 3 μg/dm3 | 50 μg/dm3 |
| Mercury, as Hg | – | – | < 0.3 μg/dm3 | 0.01 |
| Arsenic, as As | – | – | 6 μg/dm3 | 0.01 |
| Cobalt, as Co | – | – | 4 μg/dm3 | – |
| Sulfur, as S | 0.14 | 0.42 | – | |
| Volatilisation loss at 1000°C | 44.01 | 132.03 | – | |
| Total amounts of inorganic substances in drinking water | 99.98 | 117.56 | 251.71 |