Rapid performance optimization strategy of MK-FA-GBFS based geopolymer foam heavy-metal adsorbent

The pursuit of novel and efficient adsorbents is vital in potentially toxic elements wastewater treatment. A block-like geopolymer, utilizing 92 wt.% of fly ash, was synthesized to serve as a cost-effective adsorbent for Cu(II). Fly ash-based porous geopolymer (FAPGM) with 80.11% of porosity, 38.080 m2 g−1 of specific surface area and 0.886 MPa of compression strength was obtained through process parameters optimization. FAPGM exhibited excellent adsorption performance, with a maximum capacity of 62.70 mg g−1 for Cu(II). The adsorption process can be described by Langmuir and quasi-second-order kinetic models. The mechanism of Cu(II) adsorption onto FAPGM involves chemisorption, electrostatic interactions, ion exchange chemical precipitation, spontaneous and endothermic. The research indicates blocky porous geopolymer can serve as a promising candidate material for treating copper-containing wastewater.

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Rapid performance optimization strategy of MK-FA-GBFS based geopolymer foam heavy-metal adsorbent

Cited by 3 publications

References 55 publications

Rheological area division method for coupling process parameters to fabricate geopolymer foams with optimized pore structures and mechanical strength

Rheological area division method for coupling process parameters to fabricate geopolymer foams with optimized pore structures and mechanical strength

Performance of metakaolin-based geopolymer molecular sieve microspheres on dynamic recovery of Cu (II)

Preparation of a fly ash-based porous geopolymer material for copper ion removal

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