title: Comparison between rice husk ash grown in different regions for stabilizing fly ash from a solid waste incinerator.
abstract: The Stabilization of heavy metals from municipal solid waste incineration (MSWI) fly ash by rice husk ash (RHA) is under intense study as an effective strategy to recover and reuse industrial and agricultural waste together. We compare the metal entrapment performances of RHA from different Asian rice sources – namely from Japonica rice grown in Italy and Indica rice grown in India – Physicochemical and morphological characterization of the final stabilized material show that the same thermal treatment may result in marked structural differences in the silica contained in the two RHA. Remarkably, one of them displays a crystalline silica content, although obtained by a thermal treatment below 800 °C. We also find that the presence of an alkali metal ion (potassium) in the rice husk plays a crucial role in the attainment of the final silica phase. These physicochemical differences are mirrored by different stabilization yields by the two RHA.
authors.affiliation: Chemistry for Technologies Laboratory and INSTM, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Benassi
authors.affiliation: Chemistry for Technologies Laboratory and INSTM, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Bosio
authors.affiliation: Chemistry for Technologies Laboratory and INSTM, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Dalipi
authors.affiliation: Chemistry for Technologies Laboratory and INSTM, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Borgese
authors.affiliation: Chemistry for Technologies Laboratory and INSTM, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy.
authors.forename: N
authors.initials: N
authors.lastname: Rodella
authors.affiliation: Chemistry for Technologies Laboratory and INSTM, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Pasquali
authors.affiliation: Chemistry for Technologies Laboratory and INSTM, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy.
authors.forename: L E
authors.initials: LE
authors.lastname: Depero
authors.affiliation: Chemistry for Technologies Laboratory and INSTM, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Bergese
authors.affiliation: Chemistry for Technologies Laboratory and INSTM, Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy. Electronic address: elza.bontempi@unibs.it.
authors.forename: E
authors.initials: E
authors.lastname: Bontempi
mesh_terms: D060729:Coal Ash / Q000032:analysis / Q000737:chemistry*; D017745:Incineration / Q000379:methods*; D019216:Metals, Heavy / Q000032:analysis / Q000737:chemistry*; D012275:Oryza; D011188:Potassium / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D062611:Solid Waste; D013696:Temperature
chemical_list: D060729:Coal Ash; D019216:Metals, Heavy; D062611:Solid Waste; D012822:Silicon Dioxide; D011188:Potassium
keywords: Heavy metals; MSWI fly ash; Rice husk ash (RHA); Stabilization