Phytoremediation of Gold Mine Tailings Amended with Iron-Coated and Uncoated Rice Husk Ash by Vetiver Grass (Vetiveria zizanioides (Linn.) Nash)

Table 2

The selected physicochemical properties of the gold mine tailings.

Parameters	Value
Clay (%)	14.23 ± 0.61
Silt (%)	49.68 ± 0.89
Sand (%)	36.02 ± 1.43
Texture (USDA)	Silty loam
Moisture content % at 33 kpa	25.90 ± 0.36
Moisture content % at 1500 kpa	4.04 ± 0.81
pH	7.90 ± 0.02
EC (dS m^−1)	1.48 ± 0.01
CEC (cmol(+) kg^−1)	10.75 ± 0.83
Total carbon (%)	1.56 ± 0.01
ANC (kg H2SO4 t^−1)	63.90 ± 2.01
Total N (%)	0.036 ± 0.004
Total P (%)	0.076 ± 0.002
Total K (%)	0.196 ± 0.005
Total S (%)	0.140 ± 011
Total Ca (mg kg^−1)	8600 ± 30.51
Total Mg (mg kg^−1)	10750 ± 152
Total Na (mg kg^−1)	1480 ± 21
Total As (mg kg^−1)	1625.25 ± 12
Total Cd (mg kg^−1)	57.00 ± 1.41
Total Cr (mg kg^−1)	31.44 ± 0.61
Total Cu (mg kg^−1)	75.60 ± 0.65
Total Mn (mg kg^−1)	790.03 ± 9.98
Total Pb (mg kg^−1)	81.80 ± 1.75
Total Zn (mg kg^−1)	174.80 ± 1.18
Total Fe (mg kg^−1)	16420 ± 402

Mean of three replicates ± SD.