Journal of Chemistry / 2015 / Article / Tab 3

Research Article

Immobilization of Cd, Zn, and Pb from Soil Treated by Limestone with Variation of pH Using a Column Test

Table 3

Physicochemical properties and total heavy metal content of the soil used in this study.

ParameterValue4

pH7.3 ± 0.3
Av. P2O5 (mg/kg)1546 ± 35.8
Exch. cation (cmol/kg)2
 Ca2+4.09 ± 0.78
 Mg2+0.84 ± 0.15
 K+0.37 ± 0.05
Soil texture (%)
 Sand 40
 Silt58
 Clay2
Metals (mg/kg)3
 Cd90.8 ± 4.52
 Pb8,058 ± 105
 Zn5,196 ± 112

Available phosphate.
2Exchangeable cation.
3The total heavy metal content was digested via aqua regia according to the standard method of soil pollution. The soil quality standards of Cd, Pb, and Zn in South Korea are 4, 200, and 300 mg/kg, respectively.
4The figures are the averages and standard deviations of three replicates.