Assessment of the Bioavailability of Cu, Pb, and Zn through Petunia axillaris in Contaminated Soils

Table 3

The content of Cu, Ni, and Zn in soils 1 and 2, determined by ICP-MS after the extraction using water and ammonium acetate (RSD = 5%).

Bulk	Pb, μg			Cu, μg			Zn, μg
	1	2	3	1	2	3	1	2	3
Water-soluble fraction
Soil 1	0.9	1.5	2.4	1.4	2.1	3.4	3.8	4.4	6.2
Soil 2	0.5	0.7	1.0	0.8	1.1	1.7	1.2	1.8	2.7
Exchangeable fraction
Soil 1	0.2	0.5	0.8	0.4	0.7	1.1	0.1	0.5	0.7
Soil 2	1.2	1.6	2.0	0.7	1.0	1.2	1.8	2.4	3.2

1, 2, 3 experimental samples with different concentrations of metals; all values are means of 5 replications.