Role of magnesium chloride in the performance and phase composition of lead glass sludge foam

Abdel‐Gawwad, Hamdy A.; Mohammed, Aya H.; Arif, Mohamed A.; Shoukry, H.; Abadel, Aref A.; Al-kroom, Hussein; Sikora, Paweł; Elrahman, Mohamed Abd

doi:10.1016/j.matlet.2022.132325

Cited by 5 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

See 1 more Smart Citation

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

et al. 2023

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…Nonetheless, its use in foam concrete have been recently practiced (e.g., [26,27]) and often found beneficial since it generally reduces pore connectivity and settlement tendency of foams while it does not significantly increase the conductivity of the produced foams since it is a porous byproduct [23,28,29]. In general, foam concrete refers to a class of lightweight concrete with significantly reduced density and very high degree of porosity [6,8,30,31] that has major uses as insulating composite materials. Nonetheless, it is known that foams are incapable of retaining a considerable amount of thermal energy and its use is merely for insulation purposes.…”

Section: Introductionmentioning

confidence: 99%

Foam Concrete Produced with Recycled Concrete Powder and Phase Change Materials

et al. 2022

View full text Add to dashboard Cite

In construction industry, phase change materials (PCMs), have recently been studied and found effective in increasing energy efficiency of buildings through their high capacity to store thermal energy. In this study, a combination of Capric (CA)-Palmitic acid (PA) with optimum mass ratio of 85–15% is used and impregnated with recycled concrete powder (RCP). The resulting composite is produced as foam concrete and tested for a series of physico-mechanical, thermal and microstructural properties. The results show that recycled concrete powder can host PCMs without leaking if used in proper quantity. Further, the differential scanning calorimetry (DSC) results show that the produced RCP/CA-PA composites have a latent heat capacity of 34.1 and 33.5 J/g in liquid and solid phases, respectively, which is found to remain stable even after 300 phase changing cycles. In this regard, the indoor temperature performance of the rooms supplied with composite foams made with PCMs, showed significantly enhanced efficiency. In addition, it is shown that inclusion of PCMs in foam concrete can significantly reduce porosity and pore connectivity, resulting in enhanced mechanical properties. The results are found promising and point to the suitability of using RCP-impregnated PCMs in foam composites to enhance thermo-regulative performance of buildings. On this basis, the use of PCMs for enhanced thermal properties of buildings are recommended, especially to be used in conjunction with foam concrete.

show abstract

Exploring the influence of carbonate minerals on the performance, volume stability, and phase composition of alkali‐activated waste glass binder at high temperatures

Shereiqi,

Al‐Jabri,

Meddah

et al. 2024

Structural Concrete

View full text Add to dashboard Cite

Alkali‐activated waste glass (AA‐WG) has received much attention because to its high mechanical properties achieved with low energy demand. However, AA‐WG exhibits low stability, including volume expansion, porosity increment, and a reduction in compressive strength. Enhancing the stability of AA‐WG could improve its commercial viability and expand its range of applications. Therefore, this study aims to evaluate the role of calcite CaCO3 (CC) and magnesite MgCO3 (MC) in enhancing the physicomechanical properties and phase composition of AA‐WG at elevated temperatures. The proposed strategy includes replacing WG with different contents of CC and MC, followed by activation with a 4 M NaOH solution and curing at 100°C for 24 h. The hardened samples were then exposed to 800°C for a 2 h holding time to evaluate the thermal stability of the AA‐WG, AA‐WG‐CC, and AA‐WG‐MC mixtures. The results demonstrated that increasing the CC content up to 50 wt.% significantly enhanced the compressive strength of the AA‐WG when cured at 100°C, while the incorporation of MC caused a negative effect. Surprisingly, an opposite trend was observed at a higher temperature of 800°C, where the samples containing MC exhibit better mechanical and physical performance compared to those with CC. The variation in the type, composition, and weight loss upon ignition of the carbonate‐based minerals significantly influenced the stability and phase composition of the thermally exposed AA‐WG. Although the sample with 50 wt.% MC showed higher volume shrinkage, it demonstrated higher compressive strength (~82 MPa) at 800°C than the sample with 50 wt.% CC (~7 MPa). This difference can be attributed to the formation of diopside CaMgSi2O6 and forsterite Mg2SiO4, which have higher crystallinity, specific gravity, and hardness compared to wollastonite CaSiO3 and the tri‐calcium silicate phases Ca3SiO4.

show abstract

Role of magnesium chloride in the performance and phase composition of lead glass sludge foam

Cited by 5 publications

References 8 publications

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

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

Foam Concrete Produced with Recycled Concrete Powder and Phase Change Materials

Exploring the influence of carbonate minerals on the performance, volume stability, and phase composition of alkali‐activated waste glass binder at high temperatures

Contact Info

Product

Resources

About