Table 2 Concentration heavy metals (mean ± SD, mg kg^− 1) in roadside tree leaves in the study sites.

commercial

F. benghalensis

0.43 ± 0.1

1.64 ± 0.79

3.54 ± 3.23

11.38 ± 3.82

P. longifolia

0.33 ± 0.21

1.51 ± 0.87

2.71 ± 1.93

10.35 ± 8.63

S. macrophylla

0.38 ± 0.13

2.26 ± 1.09

4.41 ± 3.23

7 ± 2.98

residential

P. longifolia

0.3 ± 0.3

1.5 ± 0.4

1.65 ± 0.73

4.62 ± 5.8

S. macrophylla

0.3 ± 0

1 ± 0.1

1.58 ± 0.08

4.34 ± 1.07

industrial

F. benghalensis

0.3 ± 0.1

1.7 ± 1.1

1.55 ± 0.46

10.3 ± 6.72

S. macrophylla

0.4 ± 0.1

1.4 ± 0.1

5.26 ± 5.11

9.52 ± 0.81

rural

F. benghalensis

0.3 ± 0.1

1.5 ± 0.4

2.24 ± 1.02

8.83 ± 7.29

P. longifolia

0.3 ± 0.1

0.9 ± 0.4

2.84 ± 2.08

4.48 ± 3.86

S. macrophylla

0.2 ± 0.1

1.1 ± 0.4

1.17 ± 0.53

2.49 ± 0.5