From: Fly ash-based geopolymers: an emerging sustainable solution for heavy metal remediation from aqueous medium
Samples
Alkali activation
Adsorption capacity
qmax (mg/g)
KL (L/mg)
Langmuir (R2)
FA
–
7
0.14
0.990
Na-GP
NaOH
30
3.18
0.992
K-GP
KOH
16
4.11
0.991
NaSil-GP
NaOH + Na2SiO3
40
0.69
0.994
KSil-GP
KOH + Na2SiO3
28
0.76
0.993