Valorizing hazardous lead glass sludge and alumina flakes filling waste for the synthesis of geopolymer building bricks

Abdel‐Gawwad, Hamdy A.; Kassem, Salah; Abadel, Aref A.; Alghamdi, Hussam; Nehdi, Moncef L.; Shoukry, Hamad

doi:10.1007/s11356-022-22562-3

Cited by 7 publications

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“…On the other hand, the exposure of the NaOH-GW mixture to high temperature (800 °C) enhanced the formation of wollastonite and sodium calcium silicate crystalline phases (see Figure 3 ). The detection of wollastonite and Na/Ca silicate phases reflected the role of NaOH/temperature in the transformation of the glass structure into the crystalline one inside the FG sample [ 21 , 22 ]. Figure 4 displays the FESEM result of the as-synthesized FG.…”

Section: Resultsmentioning

confidence: 99%

“…The alkali activation process is considered one of the main anticipated techniques and has a high value in the sustainable consumption of solid wastes. In recent years, foamed materials have gained increased attention in water remediation due to their high thermal stability and porous structure [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. Numerous studied focused on utilizing alkali-activated foamed materials for the removal of contaminants from water [ 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Foamed Glass as an Effective Adsorbent for Methylene Blue: Insights into Physicochemical Properties and Theoretical Treatment

et al. 2023

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This study reports a potential approach for the valorization of glass waste (GW) that is mainly composed of amorphous silica to prepare lightweight foamed glass (FG). The preparation of FG was achieved by mixing sodium hydroxide with GW powder followed by sintering at a temperature of 800 °C. As-synthesized FG was characterized and applied as an effective adsorbent for the removal of hazardous organic water contaminants, in particular, methylene blue (MB) dye. FG exhibited porosity of 91%, bulk density of 0.65 g/cm3, compressive strength of 4 MPa, and thermal conductivity of 0.27 W/m·K. Theoretical treatment indicated that a monolayer model with one energy site was the best in fitting the removal of MB molecules. The number of MB molecules per active site (n) ranged from 2.20 to 1.70, suggesting vertical orientation and a multi-molecular adsorption mechanism. The density of FG receptor sites (DM) increased with the temperature, and this parameter played a vital role in the adsorption process. The adsorption capacity (Qsat) increased from 255.11 to 305.58 mg/g, which signifies endothermic interactions. MB adsorption on FG was controlled by physical forces such as electrostatic interactions (i.e., the adsorption energies were <20 kJ/mol). The results of this study prove the feasibility of glass waste as an effective and low-cost adsorbent for water remediation.

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Section: Resultsmentioning

confidence: 99%