Stabilization and Ecological Risk Evaluation of Heavy Metals in Farmland Soils by Addition of Attapulgite Modified with Phosphates

Table 1

Chemical properties of the initial soil.

Properties	Value
Soil pH	7.41
Electrical conductivity (EC) (mS/cm^−1)	2.16
Cation exchange capacity (CEC) (cmol/kg^−1)	73.92
Organic matter (OM)(%)	1.2
Soil available N (mg/kg^−1)	34.99
Soil available P (mg/kg^−1)	69.58
Soil available K (mg/kg^−1)	423.99
Total concentration of Cd (mg/kg^−1)	19.48
Total concentration of Zn (mg/kg^−1)	383.51
Total concentration of Ni (mg/kg^−1)	82.39