Utilisation of waste-to-energy fly ash in ceramic tiles

Yuan, Qibin; Robert, Dilan; Mohajerani, Abbas; Tran, Phuong Ha-Lien; Pramanik, Biplob Kumar

doi:10.1016/j.conbuildmat.2022.128475

Cited by 21 publications

(7 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In fact, nowadays, only about 25% of CFA is being utilized. The pathways for CFA utilization involve (i) the production of construction materials [ 5 ], (ii) the production of ceramics [ 6 ], (iii) the recovery of rare earth elements (REEs) [ 7 ], and (iv) soil amendment [ 8 ]. A promising approach for CFA utilization is its application as a feedstock for the production of value-added materials, namely zeolites [ 9 ], mesoporous silica [ 10 ], also metal–organic frameworks (MOFs) [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Zeolite Composite Materials from Fly Ash: An Assessment of Physicochemical and Adsorption Properties

et al. 2023

View full text Add to dashboard Cite

Waste fly ash, with both low (with the addition of vermiculite) and high contents of unburned coal, were subjected to hydrothermal syntheses aiming to obtain zeolite composite materials—zeolite + vermiculite (NaX–Ver) and zeolite + unburned carbon (NaX–C). The composites were compared with parent zeolite obtained from waste fly ash with a low content of unburned carbon (NaX–FA). In this study, the physicochemical characteristics of the obtained materials were evaluated. The potential application of the investigated zeolites for the adsorption of ammonium ions from aqueous solutions was determined. Composite NaX–Ver and parent zeolite NaX–FA were characterized by comparable adsorption capacities toward ammonium ions of 38.46 and 40.00 mg (NH4+) g−1, respectively. The nearly 2-fold lower adsorption capacity of composite NaX–C (21.05 mg (NH4+) g−1) was probably a result of the lower availability of ion exchange sites within the material. Adsorbents were also regenerated using 1 M NaCl solution at a pH of 10 and subjected to 3 cycles of adsorption–desorption experiments, which proved only a small reduction in adsorption properties. This study follows the current trend of waste utilization (fly ash) and the removal of pollutants from aqueous solutions with respect to their reuse, which remains in line with the goals of the circular economy.

show abstract

Section: Introductionmentioning

confidence: 99%

Zeolite Composite Materials from Fly Ash: An Assessment of Physicochemical and Adsorption Properties

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In recent years, waste incineration has become the most common treatment method worldwide, driven not only by limited landfill space, but also by the goal of energy recovery and reduction in greenhouse gas emissions [1]. Simultaneously, it is crucial to adopt a sustainable approach for properly recycling significant quantities of incineration ash, aiming to minimize potential environmental impacts and utilize landfill space [2]. Significant efforts have been made to establish effective evaluation methods, including laboratory leaching tests, field tests, life cycle assessments, and monetary valuation to assess the utilization of incineration ash as a substitute for natural resources in construction applications and the production of new materials [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Leaching Behavior and Geochemical Modeling of Cement Solidified Incineration Fly Ash Containing Waste Tires and Wood Biomass

2023

View full text Add to dashboard Cite

Waste incineration is a widely used treatment method, and sustainable approaches are required to properly recycle large volumes of incineration ash to reduce environmental impacts and landfill space consumption. Studies have focused on the potential of recycling incineration ash as a replacement for natural aggregates in civil engineering applications, such as road construction. However, industrial waste incineration ash, such as waste tire incineration ash, contains hazardous heavy metals, such as lead and zinc that pose potential environmental threats. Moreover, few studies have investigated the leachability of these hazardous metals after long-term natural aging. This study investigates the long-term evolution of leachate chemistry, mineralogical transformation, and heavy metal fixation performance of a recycled roadbed material using ash from industrial waste incineration of waste tires and biomass (SFA). Additionally, field samples from a five-year pilot test site utilizing SFA were also examined. Regulatory leaching tests showed that the concentrations of Cd, Pb, As, T-Cr, and Ni were all below permissible limits even after five years of utilization. Long-term column leaching experiment results indicated that, compared to the total content of the SFA material, the leaching ratios of Pb, T-Cr, Cu, and Zn were 27%, 12%, 5%, and 0.1%, respectively. The SFA pH-stat leaching test results demonstrated that the mass release of the total content of heavy metals was relatively minimal, even under acidic pH conditions (pH < 4). Finally, profiles of pH and major ions in leachate from the column leaching experiment were simulated using HYDRUS HP1, implementing a dual-porosity modeling approach. In conclusion, despite containing hazardous heavy metals, SFA exhibits significantly low leaching rates over a long-term period.

show abstract

“…Fly ash can be used to stabilize the soil embankment, as an aggregate filler, as an additive for bituminous paving, and as a mineral filler for bituminous concrete for road base construction [45][46][47]. Based on its oxidic composition, containing mainly SiO 2 , Al 2 O 3 , CaO, and Fe 2 O 3 , and its fine powder form, which is able to be directly incorporated into ceramic pastes, fly ash is largely used in the ceramic industry [48][49][50][51][52][53][54][55]. Other fly ash applications include zeolite synthesis [56][57][58] and polymer fillers [59][60][61].…”

Section: Introductionmentioning

confidence: 99%

New Glass Ceramic Materials Obtained from Cathode Ray Tubes Glass Wastes and Fly Ash

et al. 2023

View full text Add to dashboard Cite

This paper presents an alternative way to recycle cathode ray tube glass waste, together with fly ash and kaolin, into new glass ceramic materials. The samples were obtained using three firing temperatures: 700, 800, and 900 °C. The effect of the fly ash/CRT waste ratio upon the materials’ firing shrinkage, apparent density, apparent and total porosity, chemical stability, and compression strength was investigated. The firing shrinkage used as a dimensional stability parameter, a firing shrinkage range between 2.19–8.18%, was positively influenced by the waste mix amount. The apparent density of the obtained materials is positively affected by the heat treatment temperature, rising from 2.09 to 2.93 (g·cm−3), while the apparent porosity decreases with the increase of the firing temperature from 6.08 to 2.24 %. All the studied glass ceramics show very good chemical stability and complete immobilization of the Pb2+ and Ba2+ ions in the glass ceramic matrix. The compression strength of the sintered materials ranges between 1.42–11.83 (N·mm−2), being positively influenced by the kaolin amount and negatively influenced by porosity. The obtained results confirm the viability of the proposed alternative to use CRT waste and fly ash together with kaolin to obtain glass ceramic materials that can be used for outdoor paving applications.

show abstract

Utilisation of waste-to-energy fly ash in ceramic tiles

Cited by 21 publications

References 29 publications

Zeolite Composite Materials from Fly Ash: An Assessment of Physicochemical and Adsorption Properties

Zeolite Composite Materials from Fly Ash: An Assessment of Physicochemical and Adsorption Properties

Long-Term Leaching Behavior and Geochemical Modeling of Cement Solidified Incineration Fly Ash Containing Waste Tires and Wood Biomass

New Glass Ceramic Materials Obtained from Cathode Ray Tubes Glass Wastes and Fly Ash

Contact Info

Product

Resources

About