Dataset for the synthesis of alkali-activated materials and geopolymers over extended Si:Al:Na:Ca ratios for adsorption application

Description

The dataset presented here includes the synthesis and characterization data of alkali-activated materials (AAMs)/geopolymers with varying composition (i.e., the atomic Si:Al:Na:Ca ratios over a wide range of 1:1:1:0 to 21:1:1:21). The synthesized AAM/geopolymer samples were divided into three sets: (i) Ca-free geopolymers (Si1Al1Na1–Si20Al1Na1), in which the Si/Al ratio was progressively increased; (ii) Ca-containing AAMs (Si1Al1Na1Ca2–Si20Al1Na1Ca21), where the Ca content was increased together with the Si/Al ratio such that Ca equaled the combined Si and Al content; and (iii) Ca-containing AAMs (Si4Al1Na1Ca1–Si4Al1Na1Ca5), where the Ca content was gradually increased at a constant Si/Al ratio. The material characterization data includes XRF, XRD, SEM, FTIR, XPS, BET-BJH, 29Si NMR, PSD, and Zeta potential. Moreover, the data comprises batch adsorption results for cations with different aqueous radii, namely ammonium (NH4+, 3.31 Å/0.33 nm), methylene blue (MB, 5.04 Å/0.50 nm), and rhodamine 6G (R6G, 5.80 Å/0.58 nm). The experiments were carried out at equimolar initial concentrations of 3.13 × 10-4 mol/L for MB and R6G, and 5.54 × 10-3 mol/L for NH₄⁺. Adsorption was performed at 25 °C and pH 7.0 for 24 h, with an adsorbent dosage of 1 g/L.

Institutions

• Oulun Yliopisto

Categories

Funders

• European Union under the Marie Skłodowska-Curie Action I4WORLD

  Grant ID: 101081280

Licence