Table 4 Comparison of the levels of 7 harmful substance in running tracks from different regions.

From: Determination and analysis of harmful components in synthetic running tracks from Chinese primary and middle schools

Regions

n

Pb

Cd

Cr

PAHs

Volatile compounds

SCCPs

Phthalates

(mean ± SDa)mg/kg

(mean ± SD)g/kg

Zhenjiang

8

15.83 ± 13.75

0.10 ± 0.12

0.55 ± 0.09

677.25 ± 318.79

2.13 ± 0.78

4.32 ± 5.60

2.28 ± 2.10

Yangzhou

9

8.67 ± 14.19

0.12 ± 0.31

1.92 ± 2.44

2307.45 ± 1916.15

4.84 ± 1.31

2.03 ± 5.35

3.22 ± 2.37

Yancheng

10

4.91 ± 6.27

0.02 ± 0.06

0.75 ± 0.29

1692.30 ± 1911.35

5.00 ± 1.55

13.09 ± 14.38

5.63 ± 8.79

Xuzhou

10

18.14 ± 21.78

0.13 ± 0.07

0.24 ± 0.14

550.80 ± 446.62

5.40 ± 1.80

0.29 ± 0.45

3.57 ± 4.35

Suqian

11

26.64 ± 25.94

0.47 ± 0.42

2.73 ± 1.54

2277.45 ± 1756.08

4.36 ± 0.84

2.80 ± 4.24

3.38 ± 3.24

Wuxi

10

15.10 ± 19.15

0.08 ± 0.03

0.35 ± 0.26

131.80 ± 115.24

11.00 ± 9.10

1.97 ± 3.72

9.88 ± 6.70

Taizhou

12

22.75 ± 25.54

0.19 ± 0.37

2.17 ± 1.95

743.25 ± 561.22

4.33 ± 0.84

4.58 ± 6.70

2.82 ± 3.10

Suzhou

9

4.64 ± 5.07

0.04 ± 0.07

0.73 ± 0.24

366.89 ± 335.80

4.44 ± 1.42

0.22 ± 0.59

2.39 ± 3.44

Nantong

10

1.39 ± 0.67

0.01 ± 0.29

0.69 ± 0.21

3642.50 ± 2328.10

4.60 ± 1.36

2.68 ± 5.55

1.32 ± 1.43

Nanjing

53

7.03 ± 11.95

0.04 ± 0.09

0.42 ± 0.57

292.61 ± 883.29

5.12 ± 3.18

0.38 ± 1.58

2.06 ± 4.72

Lianyungang

10

8.10 ± 6.19

0.14 ± 0.12

0.22 ± 0.12

606.60 ± 489.42

13.70 ± 14.44

0.58 ± 1.61

3.12 ± 2.72

Huai’an

9

23.33 ± 15.30

0.54 ± 0.65

1.11 ± 1.73

1528.67 ± 1123.99

5.49 ± 1.77

3.01 ± 3.03

4.73 ± 5.53

Changzhou

6

9.30 ± 10.36

0.07 ± 0.09

0.50 ± 0.24

2092.5 ± 1877.13

4.67 ± 2.43

11.41 ± 25.49

4.41 ± 6.36

  1. n, Sample size; a Standard deviation; The data less than LOD were handled as a half of the LOD in the analyses.
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