Contaminants

Amount in soil

Okpe

Ekore

Uduvwoku

Cd

0.001 ± 0.000a

0.201 ± 0.001c

0.110 ± 0.000c

Ni

1.010 ± 0.176a

2.077 ± 0.003b

1.263 ± 0.176c

Cu

0.747 ± 0.007b

1.050 ± 0.012a

0.853 ± 0.012a

Cr

0.003 ± 0.000c

3.307 ± 0.023a

4.200 ± 0.025b

Zn

2.113 ± 0.026a

0.907 ± 0.009b

0.477 ± 0.012c

Amount in Cassava tuber

Okpe

Ekore

Uduvwoku

Cd

BDL

0.240 ± 0.009b

0.140 ± 0.006b

Ni

1.963 ± 0.024c

2.670 ± 0.210b

2.230 ± 0.041a

Cu

1.283 ± 0.009a

3.010 ± 0.000b

3.023 ± 0.009c

Cr

BDL

1.327 ± 0.020b

3.122 ± 0.688c

Zn

4.797 ± 0.026a

6.433 ± 0.078b

7.850 ± 0.10b

Amount in oil bean seed

Okpe

Ekore

Uduvwoku

Cd

0.093 ± 0.003a

0.137 ± 0.003b

0.413 ± 0.009b

Ni

5.593 ± 0.038a

2.617 ± 0.018a

2.480 ± 0.017a

Cu

0.083 ± 0.024c

0.330 ± 0.252b

3.257 ± 0.013a

Cr

0.056 ± 0.030b

2.543 ± 0.033a

3.217 ± 0.040a

Zn

0.243 ± 0.020a

1.683 ± 0.030c

2.250 ± 0.040b