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

Table 7

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

Entry	Copper content in soil^a	Lead content in soil^a	Lead content in the biomass of leafy vegetables^b
			Spinach		Lettuce
			Stems and leaves	Roots	Stems and leaves	Roots
41	0	100	0.51 ± 0.04	1.02 ± 0.08	0.25 ± 0.02	0.71 ± 0.05
42	100	100	0.46 ± 0.04	0.90 ± 0.08	0.22 ± 0.02	0.61 ± 0.05
43	200	100	0.39 ± 0.03	0.91 ± 0.08	0.21 ± 0.02	0.58 ± 0.06
44	300	100	0.31 ± 0.03	0.78 ± 0.07	0.18 ± 0.02	0.45 ± 0.03
45	400	100	0.27 ± 0.03	0.64 ± 0.07	0.15 ± 0.01	0.42 ± 0.04
46	500	100	0.31 ± 0.02	0.60 ± 0.05	0.14 ± 0.01	0.37 ± 0.03

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