Table 9.

Bioconcentration factors for heavy metals.

Sampling sites	Cd		Cr		Pb		Zn
	Root	Shoot	Root	Shoot	Root	Shoot	Root	Shoot
1	0.018	0.002	4.8	1.631	0.077	0.002	0.692	0.599
2	0.006	0.009	0.877	0.34	0.008	0.01	0.95	0.988
3	0.018	–	0.49	0.005	0.573	0.226	0.477	0.035
4	0.01	0.004	0.202	0.245	0.729	0.561	1.685	0.937
Control	0.111	–	0.923	0.671	2.375	0.005	2.307	0.033