Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill Liners

Table 2

Concentration ranges of heavy metals commonly found in sanitary landfill leachate.

Metal	Concentration range (mg/L)	Metal	Concentration range (mg/L)
Ar	0.005–1.600	Fe	0.08–5.50
Cd	0.00002–0.4	Al	0.01–1.4
Pb	0.0005–2.0000	Hg	0.00005–0.50
Cu	0.0005–10.000	Ni	0.0015–3.20
Cr	0.005–1.500	Zn	0.03–150.00

Source: adapted from Kjeldsen et al. [46] and Baun and Christensen [47].