Study on the Effect of Cu (II) and Zn (II) on the Accumulation of Pb (II) from Soil to the Biomass of Vegetable

Table 9

Effect of zinc on the accumulation of lead from soil of leafy vegetables.

Entry	Zinc content in soil^a	Lead content in soil^a	Concentration of lead in the biomass of leafy vegetables^b
			Spinach		Lettuce
			Stems and leaves	Roots	Stems and leaves	Roots
53	0	100	0.51 ± 0.04	1.02 ± 0.08	0.25 ± 0.02	0.71 ± 0.05
54	100	100	0.48 ± 0.05	0.91 ± 0.07	0.23 ± 0.01	0.65 ± 0.05
55	200	100	0.45 ± 0.04	0.83 ± 0.06	0.21 ± 0.02	0.61 ± 0.05
56	300	100	0.40 ± 0.03	0.79 ± 0.07	0.22 ± 0.02	0.56 ± 0.06
57	400	100	0.38 ± 0.04	0.71 ± 0.08	0.19 ± 0.01	0.48 ± 0.04
58	500	100	0.35 ± 0.03	0.67 ± 0.07	0.16 ± 0.01	0.40 ± 0.03

a, mg/kg of dried soil; b, mg/kg of fresh vegetable.