| As | Cd | Co | Cr | Cu | Fe | Hg | Mn | Ni | Pb | Zn |
样品数 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
最小值 | 8.73 | 0.20 | 11.2 | 45.6 | 13.2 | 22,547 | 0.299 | 372 | 2.20 | 32.6 | 69.2 |
最大值 | 79 | 0.375 | 13.4 | 92.3 | 89.8 | 37,768 | 0.574 | 604 | 40.7 | 108 | 410 |
平均值 | 17.8 | 0.267 | 12.4 | 71.2 | 36.6 | 28,851 | 0.356 | 451 | 20.1 | 44.2 | 156 |
标准差 | 11.1 | 0.046 | 0.463 | 9.18 | 18.5 | 3,076 | 0.080 | 66.7 | 9.53 | 12.1 | 73.9 |
变异系数 | 0.623 | 0.172 | 0.037 | 0.129 | 0.505 | 0.107 | 0.224 | 0.148 | 0.474 | 0.275 | 0.472 |
p值 | <0.01 | >0.15 | >0.15 | >0.15 | <0.01 | >0.15 | <0.01 | <0.01 | 0.042 | <0.01 | <0.01 |
Pi最大值 | 8.78 | 3.87 | 1.06 | 1.51 | 4.40 | 1.27 | 17.4 | 1.14 | 1.51 | 4.15 | 6.62 |
Pi平均值 | 1.59 | 2.75 | 0.976 | 1.17 | 1.62 | 0.968 | 5.48 | 0.774 | 0.747 | 1.70 | 2.11 |
Igeo最大值 | 2.55 | 1.37 | −0.864 | −0.128 | 1.55 | −0.319 | 3.54 | −0.396 | −0.136 | 1.43 | 2.14 |
Igeo平均值 | 0.270 | 0.853 | −0.981 | −0.515 | 0.090 | −0.715 | 2.82 | −0.832 | −1.354 | 0.113 | 0.610 |
背景值 [22] | 11.2 | 0.097 | 12.7 | 61.0 | 22.6 | 29,800 | 0.065 | 583 | 26.9 | 26.0 | 74.2 |