Table 4. Physicochemical properties of the Pb-contaminated soil used in this study.

Parameter	Value
pH	6.05
CEC (cmol+ kg−1)	17
Organic matter (g kg−1)	21.86
Metals (mg kg−1)
Cd	5.88
Pb	1602
Zn	2132
Exchangeable cation (cmol+ kg−1)
Ca	6.94
Mg	1.06
K	0.84
Na	0.51
Soil texture	Silty loam
Particle size distribution (%)
Sand	44.56
Silt	48.21
Clay	7.23