Table 1.
Concentration of some trace elements and heavy metals in calabash chalk obtained by chemical analysis.
| Sample | Sl.No | Elements analyzed | Concentration of elements (ppm ± SD) |
|---|---|---|---|
| Calabash Chalk Soil Sample |
01. | Magnesium (Mg) | 31.47 ± 0.42 |
| 02. | Potassium (K) | 0.20% ± 0.01% | |
| 03. | Calcium (Ca) | 26.52 ± 0.37 | |
| 04. | Manganese (Mn) | 37.29 ± 0.36 | |
| 05. | Copper (Cu) | 19.39 ± 0.25 | |
| 06. | Zinc (Zn) | 55.36 ± 0.41 | |
| 07. | Iron (Fe) | 2.53% ± 0.08 | |
| 08. | Aluminum (Al) | 223.30 ± 0.24 | |
| 09. | Chromium (Cr) | 34.45 ± 0.30 | |
| 10. | Lead (Pb) | 19.52 ± 0.32 | |
| 11. | Cadmium (Cd) | BDLa | |
| 12. | Arsenic (As) | 4.60 ± 0.18 | |
| 13. | Mercury (Hg) | BDLa |
a
BDL= Below Detection Limit (Method detection limit = 0.10 ppm).