Porous alkali‐activated material from hypergolic coal gangue by microwave foaming for methylene blue removal

Li, Xinyu; Liu, Lei; Bai, Chengying; Yang, Bingjun; Zheng, Ting; Lü, Shuang; Li, Hongqiang; Qiao, Yingjie; Colombo, Paolo

doi:10.1111/jace.18812

Cited by 19 publications

(18 citation statements)

References 129 publications

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“…Porous geopolymers synthesized from 100% coal gangue and characterization of (A) high temperature performance 110 and (B) wastewater treatment. 111 excellent ion exchangeability. Thus, they have been widely used in the fields of adsorbents, ion exchange agents, and multiphase catalysis.…”

Section: Zeolitesmentioning

confidence: 96%

“…In addition to the CG microspheres, several recent reports, respectively, used 100% calcined CG 109 and selfignition CG 110,111 as aluminosilicate raw material to prepare porous geopolymers. Sitarz et al 109 prepared geopolymer foams with two levels of porosity using calcinated CG as raw material, aluminum powder and hydrogen peroxide as foaming agent, and hydroxyethyl cellulose as foaming stabilizer.…”

Section: Porous Geopolymersmentioning

confidence: 99%

“…In addition, the saponification reaction with soybean oil greatly increased the specific surface area of the material and the adsorption capacity of MB (Figure 11B), which expands the application of gangue-based foams in the adsorption field. 111…”

Section: Porous Geopolymersmentioning

confidence: 99%

“…The removal rate of organic dyes by various porous materials based on coal gangue, as reported in the literature: (A) porous ceramic microspheres (PCM), 102 (B) porous gangue microsphere/geopolymer composites (PGMC), 108 (C) porous alkali-activated material (PGMC), 111 (D) porous gangue/palygorskite composites (PGC), 140 (E) porous ceramic microspheres, 141 (F) porous carbon (PC), 55 and (G) porous zeolite/activated carbon composites (PZCC). 130 shows the adsorption capacity of dye by-products made from CG.…”

Section: F I G U R E 1mentioning

confidence: 99%

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Fabrication and application of porous materials made from coal gangue: A review

Shao

Zheng

et al. 2023

Int J Applied Ceramic Tech

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Coal gangue (CG), which is mainly generated during coal excavation, mining, and coal washing, is an industrial solid waste that is recognized as an environmental pollutant. The ever‐increasing amount of CG produced is a serious threat to the ecological environment and property safety, especially in China, which is the largest coal producer and consumer in the world. Considerable studies have investigated means for utilizing CG worldwide. This review summarizes and discusses various porous inorganic materials made from CG, including cement‐based porous materials, porous bricks, porous ceramics (cordierite and mullite) and glasses, porous geopolymers, zeolites, aerogels, and porous carbon materials. Different preparation processes and performances of each type of porous inorganic materials were reviewed. Porous CG‐based materials can be used as promising adsorbents for the removal of various pollutants and have good potential for use in construction industry as well as catalyst material applications. Besides, porous materials obtained from CG have also been tested as slow‐release fertilizers after the absorption of phosphate, as electrode materials, and as oil‐in‐water separation agents. The systematic summary of porous materials based on CG aims at promoting high‐value‐added applications for this waste. Future research directions for the use of CG as a raw material are also presented.

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Section: Zeolitesmentioning

confidence: 96%

Section: Porous Geopolymersmentioning

confidence: 99%

Section: Porous Geopolymersmentioning

confidence: 99%

Section: F I G U R E 1mentioning

confidence: 99%

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Fabrication and application of porous materials made from coal gangue: A review

Shao

Zheng

et al. 2023

Int J Applied Ceramic Tech

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“…Foamed materials produced from alkali-activated fly ash [ 26 ], volcanic tuffs [ 27 ], and hypergolic coal gangue were utilized in the removal of water contaminants. Moreover, a 3D-printed material-based glass waste (GW) was employed as an adsorbent for the uptake of dye from contaminated water [ 28 , 29 ]. In addition, waste-derived glass was utilized as a precursor in the fabrication of highly porous foams to remove dye from solutions under UV irradiation [ 30 ].…”

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

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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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