https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&id=31450604&retmode=xml&tool=Litmetric&email=readroberts32@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09 3145060420200929
1996-194412172019Aug24Materials (Basel, Switzerland)Materials (Basel)Increased Sustainability of Carbon Dioxide Mineral Sequestration by a Technology Involving Fly Ash Stabilization.271410.3390/ma12172714Mineral carbonation, involving reactions of alkaline earth oxides with CO2, has received great attention, as a potential carbon dioxide sequestration technology. Indeed, once converted into mineral carbonate, CO2 can be permanently stored in an inert phase. Several studies have been focalized to the utilization of industrial waste as a feedstock and the reuse of some by-products as possible materials for the carbonation reactions. In this work municipal solid waste incineration fly ash and other ashes, as bottom ash, coal fly ash, flue gas desulphurization residues, and silica fume, are stabilized by low-cost technologies. In this context, the CO2 is used as a raw material to favor the chemical stabilization of the wastes, by taking advantage of the pH reduction. Four different stabilization treatments at room temperature are performed and the carbonation reaction evaluated for three months. The crystalline calcium carbonate phase was quantified by the Rietveld analysis of X-ray diffraction (XRD) patterns. Results highlight that the proposed stabilization strategy promotes CO2 sequestration, with the formation of different calcium carbonate phases, depending on the wastes. This new sustainable and promising technology can be an alternative to more onerous mineral carbonation processes for the carbon dioxide sequestration.AssiAhmadAINSTM and Chemistry for Technologies Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze, 38, 25123 Brescia, Italy.FedericiStefaniaSINSTM and Chemistry for Technologies Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze, 38, 25123 Brescia, Italy.BiloFabjolaFINSTM and Chemistry for Technologies Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze, 38, 25123 Brescia, Italy.ZaccoAnnalisaAINSTM and Chemistry for Technologies Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze, 38, 25123 Brescia, Italy.DeperoLaura ELEINSTM and Chemistry for Technologies Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze, 38, 25123 Brescia, Italy.BontempiElzaE0000-0003-1656-7506INSTM and Chemistry for Technologies Laboratory, Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze, 38, 25123 Brescia, Italy. elza.bontempi@unibs.it.engJournal Article20190824
SwitzerlandMaterials (Basel)1015559291996-1944carbon dioxide sequestrationfly ashmunicipal solid waste incinerationstabilization“The authors declare no conflict of interest.” “The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.”2019722201981420198212019828602019828602019828612019824epublish31450604PMC674760910.3390/ma12172714ma12172714Rahmani O. CO2 sequestration by indirect mineral carbonation of Ind. waste red gypsum. J. CO2 Util. 2018;27:374–380. doi: 10.1016/j.jcou.2018.08.017.10.1016/j.jcou.2018.08.017Kaliyavaradhan S.K., Ling T.-C. Potential of CO2 sequestration through construction and demolition (C&D) waste—An overview. J. CO2 Util. 2017;20:234–242.Sanna A., Uibu M., Caramanna G., Kuusik R., Maroto-Valer M.M. A review of mineral carbonation technologies to sequester CO2. Chem. Soc. 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