Research Article
Stabilization and Ecological Risk Evaluation of Heavy Metals in Farmland Soils by Addition of Attapulgite Modified with Phosphates
Table 3
The ecological risk index (ERI) and comprehensive risk index (CRI) of heavy metals in stabilized soil.
| | Metal | Extractant | ATP | AMSP | AAPR | AMRP | ASSP | AMAP | AFMP | -value |
| | Cd | CaCl2 | 20.01% | 21.68% | 14.94% | 17.68% | 18.62% | 19.60% | 17.83% | 35.708 | | TCLP | 40.90% | 38.83% | 30.79% | 35.49% | 37.14% | 37.96% | 38.03% | 2443.919 | | CRICd | 60.91% | 60.51% | 45.73% | 53.17% | 55.76% | 57.56% | 55.86% | 189.258 | | Zn | CaCl2 | 1.18% | 1.17% | 0.86% | 0.10% | 1.14% | 1.14% | 1.09% | 22.035 | | TCLP | 14.90% | 14.56% | 13.23% | 14.10% | 14.45% | 14.76% | 14.90% | 22229.821 | | CRIZn | 16.08% | 15.73% | 14.09% | 14.20% | 15.59% | 15.90% | 15.99% | 926.085 | | Ni | CaCl2 | 7.59% | 7.11% | 6.04% | 7.16% | 6.80% | 6.87% | 6.40% | 89.217 | | TCLP | 8.45% | 8.17% | 6.49% | 6.87% | 8.17% | 8.24% | 7.91% | 1550.145 | | CRINi | 16.04% | 15.28% | 12.53% | 14.03% | 14.97% | 15.11% | 14.31% | 381.208 | | CRI | 1939.62% | 1922.71% | 1461.17% | 1693.48% | 1778.21% | 1833.36% | 1777.65% | 207.068 |
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Statistical significance at 0.01. |
