Table 3 Accumulation of Pb, Zn and Cu metals (dry weight of mg/kg) in water spinach and okra as influenced by different types of spiked heavy metal treatments

5.67 ± 4.6 b

4.31 ± 4.1 b

9.98 b

1.71 ± 1.6 b

1.42 ± 2.6 b

3.13 b

0.70 ± 1.2 d

0.24 ± 0.4 d

0.94 d

27.69 ± 3.5 a

30.31 ± 4.1 a

58.00 a

1.43 ± 0.7 bc

1.26 ± 0.6 bc

2.69 bc

1.70 ± 0.3 c

1.10 ± 0.5 c

2.8 c

3.77 ± 1.7 c

3.29 ± 2.3 c

7.06 d

35.70 ± 3.7 a

35.10 ± 2.7 a

70.8 a

4.20 ± 2.0 b

1.52 ± 0.3 b

5.72 b

3.92 ± 0.7 c

3.94 ± 1.7 bc

7.86 c

0.94 ± 0.7 bc

1.34 ± 1.7 bc

2.28 c

34.80 ± 3.4 a

18.87 ± 2.6 a

53.6 a

5.00 ± 1.2 d

4.18 ± 2.9 c

9.18 c

1.10 ± 0.6 d

1.89 ± 1.2 bc

2.99 d

1.03 ± 0.6 c

0.25 ± 0.1 c

1.28 d

80.20 ± 4.7 a

18.51 ± 5.2 a

98.71 a

1.31 ± 0.7 b

1.98 ± 2.9 b

3.29 b

1.25 ± 0.7 b

0.43 ± 0.2 b

1.68 b

6.12 ± 3.5 b

13.97 ± 2.1 b

20.09 b

9.32 ± 2.9 a

5.18 ± 1.2 a

14.5 a

1.16 ± 0.6 bc

0.23 ± 0.1 c

1.39 c

5.25 ± 2.3 bc

4.01 ± 2.9 d

9.26 c

1.23 ± 0.7 c

1.95 ± 1.7 bc

3.18 bc

10.08 ± 2.4 a

2.62 ± 0.7 a

12.7 a