Potential Toxic Metal Concentration and Risk Assessment in Agricultural Soil and Lentil Crop (Lens culinaris Medik) in Dawunt Woreda, Northwest Wollo, Ethiopia
Table 1
The mean, minimum, and maximum concentration of PTEs in soil and lentil samples (mg/kg) along with the recommended level of WHO/FAO.
Sample type
Fe
Mn
Co
Cu
Cd
Pb
Cr
Lentil
Minimum
59.4
9.530
0.700
5.660
0.240
0.840
1.13
Maximum
60.9
9.770
0.790
5.740
0.260
0.990
1.18
Mean
60.4
9.683
0.750
5.697
0.250
0.903
1.15
SD
0.866
0.133
0.046
0.040
0.010
0.078
0.026
WHO/FAO
425
25.00
8.00
10.0
0.100
1.500
1.30
Corresponding soil
Minimum
645
19.50
3.250
40.00
15.05
1.800
67.8
Maximum
653
20.20
3.400
40.04
15.22
1.850
71.3
Mean
649
19.90
3.317
40.02
15.15
1.833
69.06
SD
3.73
0.350
0.076
0.021
0.091
0.029
1.933
WHO/FAO
50000
2000
50
100
3
100
100
Background
500
418
6.9
14
1.1
25
42
Permissible limits of FAO/WHO (1996). The reference value (world average background values) used for ecological risk calculations.
