Table 4.
Trace metal contents (in µg g-1) in soils and brinjal fruits collected from farmers′ fields of Jamalpur district, Bangladesh along with physicochemical properties of soils, and daily intake and recommended dietary allowances of nutritionally important elements.
| Parameters | Soil | Brinjal fruit | Daily intake of metal (µg day-1) | RDAa (mg day-1 person-1) | UTILa (mg day-1 person-1) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Max | Mean b | Median | Min | Max | Mean b | Median | ||||
| pH | 5.94 | 6.96 | 6.41 | 6.30 | – | – | – | – | – | – | – |
| EC (µS cm-1) | 72.6 | 276.0 | 131.0 | 112.1 | – | – | – | – | – | – | – |
| OM (%) | 0.23 | 2.01 | 1.27 | 1.32 | – | – | – | – | – | – | – |
| Pb | 9.10 | 23.66 | 16.93 (60) | 16.32 | 0.204 | 0.729 | 0.431 (80) | 0.393 | 3.14 | ND | 0.2242 |
| Ni | 14.05 | 25.08 | 20.84 (60) | 21.25 | 0.031 | 0.212 | 0.115 (80) | 0.108 | 0.84 | ND | 1.0043 |
| Cd | < 0.01 | 0.67 | 0.32 (33) | 0.53 | < 0.010 | 0.061 | 0.018 (32) | 0.043 | 0.13 | ND | 0.0642 |
| Cr | 45.76 | 75.28 | 62.63 (60) | 63.77 | < 0.010 | < 0.010 | < 0.010 (0) | < 0.010 | – | M = 0.035, F = 0.02543 | 0.0642 |
| Cu | 21.67 | 48.79 | 31.81 (60) | 28.42 | 1.819 | 2.668 | 2.189 (80) | 2.130 | 15.94 | M = 0.90, F = 0.9043 | 10.0043 |
| Fe | 27,126 | 36,304 | 31,882 (60) | 31,169 | 3.267 | 5.910 | 4.673 (80) | 4.833 | 34.02 | M = 8.0, F = 18.043 | 45.0043 |
| Mn | 406.6 | 604.0 | 471.6 (60) | 460.6 | < 0.010 | 0.866 | 0.231 (68) | 0.172 | 1.68 | M = 2.3, F = 1.843 | 11.0043 |
| Zn | 67.49 | 105.40 | 79.44 (60) | 80.82 | 2.160 | 3.846 | 2.685 (80) | 2.550 | 19.55 | M = 11.0, F = 8.043 | 40.0043 |
aLife stage group 19–50 years; RDA recommended dietary allowances, UTIL upper tolerable daily intake level, ND not determined, M males, F females. bValue in parenthesis indicates the number of the samples that were above the limit of detection (LoD).