Table 4.
Non-carcinogenic risk of trace elements in tap water
| Trace elements | C(mg/L) | RfD (mg/kg.d) | ADD | HQ | ||
|---|---|---|---|---|---|---|
| Child | Adult | Child | Adult | |||
| As | 1.00E-03 | 3.00E-04 | 6.67E-05 | 2.86E-05 | 2.22E-01 | 9.52E-02 |
| Cd | 1.00E-03 | 5.00E-04 | 6.67E-05 | 2.86E-05 | 1.33E-01 | 5.71E-02 |
| Cr | 1.00E-03 | 3.00E-03 | 6.67E-05 | 2.86E-05 | 2.22E-02 | 9.52E-03 |
| Ni | 1.60E-03 | 2.00E-02 | -1.07E-04 | 4.57E-05 | 5.33E-03 | 2.29E-03 |
| Pb | 3.00E-03 | 3.50E-03 | 2.00E-04 | 8.57E-05 | 5.71E-02 | 2.45E-02 |
| B | 4.60E-01 | 2.00E-01 | 3.07E-02 | 1.31E-02 | 1.53E-01 | 6.57E-02 |
| Al | 4.60E-02 | 1.00E-00 | 3.06E-03 | 1.31E-03 | 3.06E-03 | 1.31E-03 |
| Hg | 1.00E-03 | 3.00E-04 | 6.67E-05 | 2.86E-05 | 2.22E-01 | 9.52E-02 |
| Mn | 4.50E-03 | 1.40E-01 | 3.00E-04 | 1.29E-04 | 2.14E-03 | 9.18E-04 |
| Zn | 3.60E-02 | 3.00E-01 | 2.40E-03 | 1.03E-03 | 8.00E-03 | 3.43E-03 |
| Cu | 6.20E-03 | 4.00E-02 | 4.13E-04 | 1.77E-04 | 1.03E-02 | 4.43E-03 |
| Fe | 5.50E-02 | 7.00E-01 | 3.67E-03 | 1.57E-03 | 5.23E-3 | 2.24E-3 |
| Se | 1.00E-02 | 5.00E-03 | 6.67E-04 | 2.86E-04 | 1.33E-1 | 5.71E-2 |
| Ba | 1.80E-02 | 2.00E-01 | 1.20E-04 | 5.14E-04 | 6.00E-3 | 2.57E-3 |
| HI = ΣHQi | 9.84E-01 | 4.22E-01 | ||||