Table 2 Comparative analysis of HM contents (mg kg−1) in the topsoil of diverse cities. NA means not available.
City | As | Ba | Co | Cr | Cu | Mn | Ni | Pb | Zn | V | References |
|---|---|---|---|---|---|---|---|---|---|---|---|
Karamay | 20.65 | NA | NA | 117.86 | 64.22 | NA | 42.7 | 32.56 | 123.32 | NA | Wang et al.24 |
Yinchuan | NA | NA | 37.2 | 109.1 | 16.8 | NA | 25.3 | 25.0 | 26.0 | 59.9 | Zhang et al.44 |
Rawalpindi | NA | NA | 33.4 | 295.3 | 335.7 | 633.7 | 235.7 | 1572.4 | 542.5 | NA | Shehzad et al.45 |
Klang | NA | NA | 1.20 | 15.58 | 29.35 | NA | NA | 52.73 | 275.75 | NA | Yuswir et al.46 |
Beni Mellal | 3.9 | NA | NA | 64.4 | 46.8 | 1097.9 | 20.2 | 95.1 | 228.6 | NA | Odewande and Abimbola47 |
Ancona | NA | NA | 18.1 | 45.6 | 63.9 | NA | 50.9 | 97.4 | 199.1 | NA | Serrani et al.48 |
Changchun | 12.5 | NA | NA | 66.0 | 29.4 | 880.0 | NA | 35.4 | 90.0 | NA | Yang et al.49 |
Guiyang | 16.8 | NA | NA | NA | 66.1 | NA | 38.9 | 79.5 | 243.0 | NA | Li et al.50 |
Yan’an | NA | NA | NA | 66.22 | 23.65 | NA | 37.56 | 20.18 | 71.20 | NA | Hu et al.51 |
Xi’an | NA | NA | 19.3 | 81.1 | 54.3 | 671.5 | 34.5 | 59.7 | 186.2 | 85.2 | Chen et al.52 |
Beijing | NA | NA | NA | 61.0 | 31.7 | NA | 24.0 | 23.3 | 92.9 | NA | Wang et al.53 |
Nanjing | 9.94 | NA | NA | 74.54 | 37.25 | NA | 31.89 | 32.52 | 109.15 | NA | Wang et al.54 |
Mianyang | 11.2 | 586.8 | 20.2 | 124.7 | 37.8 | 661.5 | 34.9 | 28.4 | 102.2 | 96.6 | This work |
