Adsorption Property of Pb(II) by the Laterite-Bentonite Mixture Used as Waste Landfill Liner

Table 2

Basic properties of GMZ bentonite.

Specific gravity, Gs	2.66
Liquid limit, ωL (%)	276
Plastic limit, ωp (%)	37
Total specific surface area (m^2·g^−1)	570
Cation exchange capacity (cmol·kg^−1)	77.30
Main exchange cations (cmol·kg^−1)	Na^+ (43.36); 1/2 Ca^2+ (14.57); 1/2 Mg^2+ (6.17); K^+ (2.51)
Mineral component (%)	Montmorillonite (75.4), quartz (11.7) cristobalite (7.3); feldspar (4.3); Kaolinite (0.8); calcite (0.5)
Chemical component (%)	SiO2 (67.43), Al2O3 (14.20), Na2O (1.75), CaO (1.13)