CINECA IRIS Institutional Research Information System

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MSWI fly ash steam washing, aimed to reach a condition of non- hazardous waste and to their possible reuse.

Due to the high content of heavy metals and soluble salts, municipal solid waste incineration fly ash (MSWI FA) is classified as hazardous waste and its reuse is limited for their environmental risks. This work analyzes the steam washing application, to remove chlorides and heavy metals from MSWI FA, in order to reach a condition of non-hazardous waste, making them more suitable for stabilization as geopolymers or cement. The target of the steam application is both a sustainable and optimized...

Environmental suitability of MSWI fly ash geopolymers: evaluation by leaching tests

This work is focused on the possible reutilization of municipal solid waste incinerator (MSWI) fly ash as a metakaolin replacement in the acid-based geopolymer. This type of geopolymer, obtained by the reaction between an aluminosilicate source (metakaolin) and phosphoric acid to form an Al- O-P/Si-O-P matrix (Wang et al, 2019), have displayed better performance than the traditional alkali- silicate geopolymer, in terms of corrosion resistance (Wagh et al, 2011), thermal stability and mechani...

MSWI fly ash particle size chemical and mineralogical characterization, before and after leaching tests, aimed to reuse.

Municipal solid waste incinerator (MSWI) fly ash can represent a sustainable source of construction materials, but it needs to be treated in order to remove dangerous substances as chlorides, sulfates, and heavy metals. The concentration of salts and heavy metals in fly ash usually exceeds the law threshold and so they are considered a hazardous waste, unsuitable for reuse in concrete and civil engineering applications.In this work, a complete characterization of fly ash coming from a norther...