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

Table 7

Comparison of the cationic heavy metal adsorption capacities of various adsorbents.

Adsorbent	Heavy metal	b (mg/g)	Reference
Acid-activated clay	Ni	0.44	[75]
Bentonite clay from Bhawnagar, India	Pb	19.45	Khan et al., [76]
Bentonite	Ni	13.97	[77]
Bentonite	Ni	26.32	[78]
Bentonite	Cu	17.87
Bofe bentonite clay	Zn	0.77	Araújo et al., [36]
Magnetic bentonite	Pb	80.40	Zou et al., [79]
Bagasse fly ash	Cd	1.24-2.0	Ahmaruzzaman [80]
Magnetic oak wood biochar	Cd	2.87	Mohan et al. [81]
Treated olive stones	Cd	49.3	Aziz et al. [82]
Magnetic litchi peel	Pb	78.74	Jiang et al. [83]
Commercial activated carbon	Pb	42.50	Shahrokhi-Shahraki et al. [84]
	Cu	15.00
	Zn	14.00
Natural zeolite	Cu	0.11	Motsi et al. [85]
	Zn	0.02
Activated carbon from rice husk	Ni	17.23	Ma et al. [86]
	Cd	29.61