N˚

Paulownia

(Paulownia tomentosa (Thunb.) Steud., 1841

Concentration (mg/kg) of heavy metals

As

Cd

Pb

Zn

I (Control)

1.

Root

0.72 ± 0.006

2.65 ± 0.04

1.17 ± 0.08

23.52 ± 2.87

2.

Seedling

0.27 ± 0.004

0.82 ± 0.07

2.46 ± 0.07

47.73 ± 3.18

3.

Leaf

0.54 ± 0.007

1.84 ± 0.05

3.24 ± 0.19

52.65 ± 3.38

4.

Flower/Fruit

0.42 ± 0.005

0.47 ± 0.06

1.78 ± 0.18

14.25 ± 1.47

II (Control)

1.

Root

3.10 ± 0.08**

4.34 ± 0.05**

2.45 ± 0.08*

42.04 ± 2.65**

2.

Seedling

3.04 ± 0.05**

1.28 ± 0.08*

3.76 ± 0.03*

54.45 ± 2.34*

3.

Leaf

3.12 ± 0.06**

3.63 ± 0.06**

6.85 ± 0.54**

86.64 ± 2.05*

4.

Flower/Fruit

2.09 ± 0.04**

1.18 ± 0.04*

2.47 ± 0.05**

44.38 ± 3.16**

III (Control)

1.

Root

3.24 ± 0.06**

4.73 ± 0.04**

2.76 ± 0.06*

38.18 ± 1.63**

2.

Seedling

3.65 ± 0.04**

1.33 ± 0.06*

3.34 ± 0.17**

51.25 ± 2.35*

3.

Leaf

4.07 ± 0.03**

3.78 ± 0.05**

6.73 ± 0.15**

78.66 ± 3.44**

4.

Flower/Fruit

2.36 ± 0.05**

1.57 ± 0.03**

2.68 ± 0.03**

45.27 ± 2.25**

5.

Average value from certain plants [3] [18] [21] [22]

2.7 - 3.2

0.5 - 4.8

0.1 - 5

15 - 150

6.

Allowed concentration (mg/kg) [22] [23] [24] [25]

0.1 - 1

0.03 - 3

0.4 - 6

10