Review of the Reuse Possibilities Concerning Ash Residues from Thermal Process in a Medium-Sized Urban System in Northern Italy

Sustainability

Rita La Spina¹  Jessica Ponti¹  Andrea Valsesia¹  Fabjola Bilo²  Alessandra Zanoletti²  Laura E. Depero²  Ahmad Assi²  Elza Bontempi² 

[1] European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy;INSTM and Chemistry for Technologies Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, 25123 Brescia, Italy;

关键词: fly ash;    bottom ash;    silica fume;    coal fly ash;    flue gas desulfurization;    rice husk ash;   

DOI  :  10.3390/su12104193

来源: DOAJ

【 摘 要 】

This review paper reports a detailed characterization of some combustion or incineration residues and by-products produced in a medium-sized city in Northern Italy. The municipal solid waste incineration (MSWI) generates fly ash, which is a toxic waste. Coal fly ash (CFA) and flue gas desulfurization (FGD) derive from the thermoelectric coal plant located in the same city. Along with these ashes, silica fume and rice husk ash are also considered for the stabilization of fly ash based on their amorphous silica content with the aim to convert them into an inert material. The characterization of all the investigated ashes was performed using different techniques: X-Ray diffraction, total reflection X-Ray fluorescence, scanning electron microscopy, and transmission electron microscopy. The aim of this work is to describe the reuse possibilities that were proposed for these ashes, which were determined also on the basis of their structural properties. Several possible applications of the investigated ashes are proposed, and the most suitable reuse of stabilized fly ash samples seems to be the production of sustainable plastic composites. This paper shows that the reuse of the by-product materials can allow natural resources to be preserved following the principles of a circular economy.

【 授权许可】

Unknown