Prediction of Heavy Metal Removal by Different Liner Materials from Landfill Leachate: Modeling of Experimental Results Using Artificial Intelligence Technique

Table 1

Chemical compositions of the liner materials.

Components	B	NZ	EV	P
Na2O	1.80	0.40	0.05	3.65
MgO	4.00	1.40	17.75	0.03
Al2O3	17.00	11.80	18.45	12.27
SiO2	61.00	71.00	41.29	73.44
CaO	2.50	3.40	0.25	0.96
TiO2	—	0.10	1.21	0.10
K2O	0.50	2.40	7.21	4.37
Fe2O3	3.00	1.70	6.51	1.2
MnO	—	—	0.04	0.06
SO3	—	0.12	—	0.08
LOI	3.51	6.87	5.02	3.72
CEC (meq/100)	31.8	166.3	52.9	34.6

B: bentonite, NZ: natural zeolite, EV: expanded vermiculite, P: pumice.