Zeolite Synthesized by Alkaline Hydrothermal Treatment of Bottom Ash from Combustion of Municipal Solid Wastes.

Abstract

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Influence of hydrothermal treatment on the mechanical and environmental performances of mortars including MSWI bottom ash

“…The mineral can form under hydrothermal conditions (Fukui et al, 2009) due to the alkalis supplied by the BA (1.8 wt.% NaO, 1.2 wt.% K 2 O). The formation of zeolites during HT, in presence of MSWI BA has been reported in other studies (Deng et al, 2016;Penilla et al, 2003;Temuujin et al, 2002). It is however unusual that no Ca 2+ could be detected, since K-Phillipsite readily incorporates this element.…”

Feasibility Study of Municipal Solid Waste Incinerator Bottom Ash as Geopolymer Precursor

“…As waste disposal by incineration increases, there is need to develop innovative applications of IBA with environmental and economic benefits.. Currently, IBA is utilized as filler for road base construction (Santagata, et al, 2014), raw material for cement production (Li, et al, 2012), cement or aggregates substitute for concrete production (Kuo, et al, 2013), material for zeolites (Penilla, et al, 2003) and tobermorite synthesis (Jing, et al, 2007), and adsorbent for heavy metal removal (Zhang, et al, 2011). These approaches generally require complex and/or costly pre-treatments before it can be used for usually low value added applications.…”

Hydrothermal treatment of bottom ash from the incineration of municipal solid waste: Retention of Cs(I), Cd(II), Pb(II) and Cr(III)

“…The minority crystalline phases were ␣-Fe 2 O 3 (hematite) and probably, Mg 2 C 3 . Samples with potential adsorption or cation exchange properties, obtained previously from the transformation of the bottom ash after various treatments [19], were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray analysis. The surface areas and pore size distribution were measured by a multipoint BrunauerEmmett-Teller (BET) method.…”

“…In a previous work [19], we studied the transformation of bottom ash as a function of various types of HT in NaOH and water, at temperatures ranging from ambient to 200 • C. The results showed that bottom ash was transformed in compounds with potential immobilization capacity, such as zeolite-type A (Na 6 The present paper focuses on the retention of Cs + , Cd 2+ , Pb 2+ and Cr 3+ by the aforementioned compounds previously synthesized by Peña et al [19], which would represent a new application of bottom ash in environmental waste disposal. The changes in the micro porosity, specific surface (BET-N 2 ) and microstructure of the bottom ash are also discussed.…”