Details

Autor(en) / Beteiligte

• Zhang, Junjie
• Liu, Bo
• Zhang, Shengen

Titel

A review of glass ceramic foams prepared from solid wastes: Processing, heavy-metal solidification and volatilization, applications

Ist Teil von

• The Science of the total environment, 2021-08, Vol.781, p.146727, Article 146727

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2021

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• The safe utilization of solid wastes containing heavy metals plays a crucial role in environmental preservation. As an efficient technology to achieve this goal, the preparation of glass ceramic foams from solid wastes can produce an excellent solidification effect on heavy metals. At present, there have been plenty of efforts made to achieve an excellent combination of such characteristics as mechanical strength, bulk density, thermal conductivity and so on, with the purpose to ensure the application in various high value-added fields. Due to the concentration on their application in the construction sector such as the use of thermal and acoustic insulation materials, some researchers seek to expand the scope of their applications. In this paper, a review is conducted into the methods used to prepare solid waste-based glass ceramic foams. Depending on the exact processing route, these methods can be categorized into two classes, which are powder sintering and inorganic gel casting. Not only heavy metals hinder the application of solid waste, they can also cause irreversible pollution to the wider environment. Solidification and volatilization represent the two routes associated with heavy-metal migration during the preparation of glass ceramic foams. Both traditional and innovative applications are indicated in this review. Furthermore, a discussion is conducted about the prospects and challenges facing different processing strategies, heavy-metal migration and applications. [Display omitted] •Waste-derived glass ceramic foams can reduce pollution caused by solid waste.•Influence of factors on synthesizing glass ceramic foams by solid waste are commented.•Solidification and volatilization of heavy metals are reviewed.•Solidification can prevent heavy metals entering the environment.•Traditional and innovative applications for glass ceramic foams are reviewed.