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Table 3 Nemerow pollution index (NIPI), potential (\(E_{\text{r}}^{i}\)) and comprehensive (RI) ecological harm indices before bioremediation

From: Pyritic metals sequestration on mine dumps treated with oyster mushroom (Pleurotus ostreatus, Jacq.et Fr.)

Heavy metal Trojan mine Freda-Rebecca mine Renny mine Bindura mine
NIPI \(E_{\text{r}}^{i}\) RI NIPI \(E_{\text{r}}^{i}\) RI NIPI \(E_{\text{r}}^{i}\) RI NIPI \(E_{\text{r}}^{i}\) RI
Mn2+ 0.9 46.0 170.0 0.8 45.0 174.0 0.9 44.0 171.0 0.9 43.0 172.0
Cr2+ 3.2 60.0 289.0 3.6 62.0 286.0 3.0 63.0 290.0 3.4 60.0 278.0
Pb2+ 4.6 170.0 659.0 4.9 174.0 653.0 4.7 172.0 658.0 4.5 175.0 662.0
Fe3+ 4.1 90.0 455.0 3.9 89.0 462.0 3.8 91.0 453.0 3.7 90.0 458.0
Cd2+ 2.6 100.0 356.0 2.4 103.0 358.0 2.5 102.0 360.0 2.6 100.0 355.0