Table 3 Variations (δ) of PTE (pseudo-total concentrations) between 0–10 cm and 10–20 cm depth within the same sample (δ = [PTE]0–10 – [PTE]10–20) and soil phytoavailable PTE concentrations (mean ± standard deviation (n = 5)).

From: Coronilla juncea, a native candidate for phytostabilization of potentially toxic elements and restoration of Mediterranean soils

Sites

 

Variations (δ) of PTE soil concentration between 0–10 cm and 10–20 cm

As

Cu

Pb

Sb

Zn

Sormiou (S)

Min

− 0.5

− 0.8

13

− 1.1

− 7.3

Mean ± SD

5.5 ± 5.0 c

1.8 ± 2.5 bc

37 ± 23 bc

1.5 ± 1.7 bc

10.6 ± 20.9 c

Max

11.5

4.8

66

2.6

40.0

Escalette 1 (E1)

Min

86

0.05

− 756

− 50

243

Mean ± SD

151 ± 72 b

3.3 ± 2.6 b

732 ± 1113 b

10.5 ± 44 b

446 ± 223 b

Max

230

6.6

1914

47

643

Escalette 2 (E2)

Min

3670

11.3

25,593

1281

4249

Mean ± SD

4850 ± 1321 a

13.9 ± 4.1 a

34,116 ± 8069 a

1985 ± 614 a

8164 ± 3556 a

Max

6441

20.0

44,991

2714

12,351

Sites

Depths

Phytoavailable PTE (mg kg−1) at 0–10 cm and 10–20 cm soil depth

As

Cu

Pb

Sb

Zn

Sormiou (S)

0–10 cm

 < LOD

2.9 ± 1.3 (19%)

5.52 ± 7.01 (4%)

 < LOD

11.13 ± 5.37 (11%)

10–20 cm

 < LOD

2.0 ± 0.8 (14%)

 < LOD

 < LOD

10.32 ± 3.4 (11%)

Escalette 1 (E1)

0–10 cm

78.3 ± 43.5 (11%)

4.1 ± 1.3 (17%)

3075 ± 1344 (49%)

7.88 ± 3.57 (4%)

325 ± 184 (17%)

10–20 cm

49.7 ± 35.0 (9%)

3.0 ± 1.1 (14%)

2336 ± 1245 (45%)

4.86 ± 4.18 (3%)

241 ± 144 (19%)

Escalette 2 (E2)

0–10 cm

670 ± 376 (11%)

5.9 ± 2.2 (19%)

10,246 ± 2873 (25%)

234 ± 90 (9%)

2062 ± 918 (20%)

10–20 cm

267 ± 266 (13%)

2.4 ± 2.8 (11%)

4818 ± 3163 (41%)

74 ± 35 (8%)

750 ± 269 (21%)

  1. For phytoavailable PTE, the percentage in brackets refers to the ratio of the phytoavailable PTE concentrations on pseudo-total PTE concentrations ([PTE]phytoavailable/[PTE]pseudo-total). “ < LOD” indicates values below detection limits. In the same row, values followed by different letters are significantly different (Wilcoxon test, P ≤ 0.05).
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