Table 4: Reference values (mg/kg) and toxicity coefficients () of heavy metals in sediments.
Heavy Metals | Cr | Cd | Cu | Zn | Pb |
Tr | 2 | 30 | 5 | 1 | 5 |
ERM | 370 | 9.6 | 270 | 410 | 220 |
PEL | 160 | 4.2 | 108 | 271 | 112 |
ERL | 81 | 1.2 | 34 | 150 | 47 |
TEL | 52.3 | 0.68 | 18.6 | 124 | 30.2 |
Geochemical background | 90 | 0.3 | 45 | 95 | 20 |
TEL: Threshold Effect Level; PEL: Probable Effect Level; ERL: Effects Range Low; ERM: Effects Range Median; : Background/ Reference values(mg/kg) and : Toxicity Coefficients [22,60].