Table 3.

Major ions concentration in washing solutions as determined after each washing cycle of the specimens, expressed as (mg of ion)/(g of hybrid geopolymer foam).

Sample	F− (mg/g of Adsorbent)	Cl− (mg/g of Adsorbent)	NO3− (mg/g of Adsorbent)	PO43− (mg/g of Adsorbent)	SO42− (mg/g of Adsorbent)	Na+ (mg/g of Adsorbent)	K+ (mg/g of Adsorbent)
After wash cycle No. 1
GSil3A	0.000	0.104	0.106	0.091	0.100	2.777	0.342
GSil3B	0.000	0.019	0.033	0.028	0.033	0.860	0.106
GSil12A	0.014	0.200	0.098	0.105	0.277	9.670	0.290
GSil12B	0.022	0.263	0.046	0.056	0.346	7.396	0.183
After wash cycle No. 2
GSil3A	0.000	0.076	0.053	0.049	0.084	2.895	0.178
GSil3B	0.000	0.014	0.015	0.015	0.027	0.804	0.045
GSil12A	0.000	0.039	0.043	0.041	0.057	2.620	0.125
GSil12B	0.006	0.033	0.015	0.021	0.053	2.464	0.048
After wash cycle No. 3
GSil3A	0.000	0.066	0.054	0.050	0.087	3.081	0.198
GSil3B	0.000	0.022	0.015	0.015	0.030	0.939	0.062
GSil12AI	0.000	0.058	0.044	0.040	0.047	1.136	0.156
GSil12B	0.000	0.035	0.014	0.014	0.026	1.432	0.072
After wash cycle No. 4
GSil3A	0.000	0.031	0.052	0.049	0.077	1.762	0.137
GSil3B	0.000	0.013	0.016	0.017	0.046	1.167	0.047
GSil12A	0.000	0.017	0.000	0.038	0.043	0.662	0.106
GSil12B	0.000	0.006	0.015	0.015	0.022	0.815	0.042