Table 4 Single factor potential ecological risk (Eir) and comprehensive potential ecological risk index RI evaluated for each of the urban sinkholes under study in Cancun.
From: Heavy metals in the sediments of urban sinkholes in Cancun, Quintana Roo
Eir | Zn | Fe | Al | Cu | Ni | Pb |
|---|---|---|---|---|---|---|
A | 106.0 | n.a | 0.5 | 20.0 | 0.4 | 12.9 |
B | 27.8 | 1.0 | 17.8 | 0.0 | 1.0 | |
C | 29.6 | 1.1 | 8.4 | 0.3 | 1.9 | |
D | 79.2 | 3.0 | 16.8 | 0.3 | 3.0 | |
E | 32.4 | 2.9 | 11.2 | 0.1 | 3.6 | |
F | 42.9 | 0.3 | 30.4 | 0.4 | 9.5 | |
G | 40.3 | 4.3 | 7.4 | 0.0 | 0.0 | |
H | 21.3 | 0.2 | 5.7 | 0.2 | 0.0 | |
I | 35.4 | 1.3 | 12.2 | 0.1 | 0.0 | |
J | 22.8 | 0.6 | 5.5 | 0.0 | 0.0 | |
RI | 437.3 | – | 15.2 | 135.2 | 1.8 | 31.9 |
RI* | 2186.5 | 675.8 |
