Porous glass-ceramics from alkali activation and sinter-crystallization of mixtures of waste glass and residues from plasma processing of municipal solid waste

Monich, Patrícia Rabelo; Romero, Acacio Rincon; Höllen, Daniel; Bernardo, Enrico

doi:10.1016/j.jclepro.2018.03.167

Cited by 79 publications

(54 citation statements)

References 22 publications

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“…Unlike the extensively used polymeric foams, glass foams consist in a much safer option for building insulation in case of fire. However, these foams are still quite expensive to be produced due to specific process and additives used (Monich, Romero, Höllen, & Bernardo, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…An alternative technique, aimed at decreasing the high cost involved in the production of glass foams and based on alkali activation, has been recently developed (Rincón, Giacomello, Pasetto, & Bernardo, 2017). According to this approach, that could be defined of 'inorganic gel casting', a suspension of fine glass powders, in an alkaline solution of low molarity, undergoes progressive hardening due to the formation of surface gels (Elsayed et al, 2017;Garcia-Lodeiro, Aparicio-Rebollo, Fernández-Jimenez, & Palomo, 2016;Monich et al, 2018;Rincón et al, 2017), in turn due to the partial dissolution of the same glass. Before complete setting, a surfactant is added to the suspension, later subjected to intensive mechanical stirring.…”

Section: Introductionmentioning

confidence: 99%

“…The material is then extracted from the container, dried and sintered by viscous flow (Rincón et al, 2017). This technique has already been successfully applied in the production of highly porous and strong waste derived materials (Monich et al, 2018;Rincón, Desideri, & Bernardo, 2018;Rincón et al, 2017;Rincon Romero, Salvo, & Bernardo, 2018) as well as bioactive glass-ceramics (Elsayed et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Four different types of porous glass-ceramics were developed in order to minimize costs of production, especially related to the alkaline solution and heating treatment, without compromising the mechanical properties and chemical stability of the foams. Recycled soda-lime glass (SLG) was used to aid the gelation and sintering process of two groups of materials (Monich et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…The overall approach does not strictly match with the concept of 'landfill mining' (Monich et al, 2018), according to which landfill remediation is performed by excavation, removal of directly recyclable components (e.g. metallic objects, plastics), pyrolysis (with transformation of organic compounds into combustible gas) and conditioning of the inorganic residue.…”

Section: Introductionmentioning

confidence: 99%

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Strong Porous Glass-Ceramics From Alkali Activation and Sinter-Crystallization of Vitrified Mswi Bottom Ash

et al. 2019

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Vitrification of municipal solid waste incineration (MSWI) bottom ash is an effective method to produce a chemically stable glass, with metal recovery. In order to justify the high costs of this process, the vitrified residue can then be upcycled into potential marketable products. In this study, vitrified bottom ash was successfully converted into strong and chemically stable porous glass-ceramics by the combination of alkali activation and sintering. After the activation of the glass in a NaOH solution of low molarity, foams were easily produced by intensive mechanical stirring, with the aid of a surfactant, and stabilized by gelation. The obtained open-celled material was further consolidated by a sintering treatment, at 800-900 °C. The addition of recycled soda-lime glass allowed activation at low molarity and sintering at lower temperature, but it reduced the mechanical properties and the stabilization of heavy metals. On the other hand, the increase in molarity of the alkaline solution increased the porosity and also the strength of foams from vitrified bottom ash.

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Section: Introductionmentioning

confidence: 99%