项目 | Cd (μg/g) |
| ||||||
水溶态 | 离子交换态 | 碳酸盐结合态 | 腐殖酸结合态 | 铁锰结合态 | 强有机结合态 | 残渣态 | Cd全量 | |
最小值 | 0.001 | 0.062 | 0.020 | 0.019 | 0.022 | 0.029 | 0.023 | 0.362 |
最大值 | 0.012 | 0.255 | 0.105 | 0.072 | 0.045 | 0.081 | 0.236 | 0.779 |
平均值 | 0.002 | 0.159 | 0.044 | 0.045 | 0.031 | 0.050 | 0.089 | 0.524 |
标准离差 | 0.003 | 0.048 | 0.022 | 0.016 | 0.006 | 0.015 | 0.054 | 0.124 |
变异系数 | 152.5% | 30.33% | 48.98% | 36.29% | 21.00% | 29.52% | 60.84% | 23.69% |
占全量/% | 0.32% | 30.30% | 8.45% | 8.50% | 5.87% | 9.51% | 16.88% | 1 |