Synthesis of high quality zeolites from coal fly ash: Mobility of hazardous elements and environmental applications

Feng, Wang; Wan, Zhijian; Daniels, Jacqueline; Li, Zhikao; Xiao, Gongkui; Yu, Jialin; Xu, Dahai; Guo, Hai‐Yang; Zhang, Dongke; Li, Gang

doi:10.1016/j.jclepro.2018.08.140

Cited by 93 publications

(44 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then, they should be substituted by alternative sources that add value to materials considered waste for many industries and processes, bringing a new perspective to the production of catalytic materials with an appeal for environmental awareness. It is known from the literature that it is possible to synthesize zeolites from various non-traditional materials containing silicon and aluminium, such as waste porcelain, coal ash or kaolin [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

LTA zeolite synthesis using natural materials and its evaluation by Green Star methodology

et al. 2020

View full text Add to dashboard Cite

The industrial costs of zeolite synthesis can be diminished by the substitution of traditional raw materials by natural sources. In this work, we obtained LTA zeolite from four natural materials, three different diatomites and expanded perlite, and characterize them by X-ray diffraction, X-ray fluorescence and scanning electron microscopy. It was possible to observe the formation of the zeolitic materials through the identification of the Bragg reflections and the cubic morphology characteristic of the aluminosilicate. The Si/Al ratio of the samples resulted next to the unit as expected for this topology. We found small differences between the zeolitic products, remarking the possibility of adapting this process using natural materials to industry. These results were used for the Green Star evaluation, calculating the synthesis degree of greenness, resulting greener due to the complete substitution of the traditional silica source.

show abstract

Section: Introductionmentioning

confidence: 99%

LTA zeolite synthesis using natural materials and its evaluation by Green Star methodology

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Studies on the mobility of metals (investigated via leaching in aqueous solutions at various pH, for example, 1, 2, 12, 13) such as arsenic, lead, chromium and cadmium in zeolites have shown that, due to the zeolitization process, heavy metal elements are immobilized in the zeolite structure, while part of the metalloid elements migrated into the wastewater. The opposite was observed in the case of fly ash, where migration of toxic elements was noticed, which confirms the need to recycle coal fly ash [29].…”

Section: Introductionmentioning

confidence: 88%

Impact of Fly Ash Fractionation on the Zeolitization Process

et al. 2020

View full text Add to dashboard Cite

Coal combustion product in the form of fly ash has been sieved and successfully utilised as a main substrate and a carrier of silicon and aluminium in a set of hydrothermal syntheses of zeolites. The final product was abundant in zeolite X phase (Faujasite framework). Raw fly ash as well as its derivatives, after being sieved (fractions: ≤ 63, 63–125, 125–180 and ≥ 180 µm), and the obtained zeolite materials were subjected to mineralogical characterisation using powder X-ray diffraction, energy-dispersive X-ray fluorescence, laser diffraction-based particle size analysis and scanning electron microscopy. The influence of fraction separation on the zeolitization process under hydrothermal synthesis was investigated. Analyses performed on the derived zeolite X samples revealed a meaningful impact of the given fly ash fraction on synthesis efficiency, chemistry, quality as well as physicochemical properties, while favouring a given morphological form of zeolite crystals. The obtained zeolites possess great potential for use in many areas of industry and environmental protection or engineering.

show abstract

“…Simultaneously, this offers signicant economic and environmental benets. Fly ash is used in concrete production, ceramic industry, 27 soil amelioration, 28 valuable metal recovery, 29 zeolite syntheses, 30 catalyst supports, 31 and adsorbents for water treatment. 32 Moreover, y ash is a potential adsorbent for dyes and heavy metals because it is composed of signicant amounts of alumina and silica.…”

Section: Introductionmentioning

confidence: 99%

Insights into the competitive adsorption of pollutants on a mesoporous alumina–silica nano-sorbent synthesized from coal fly ash and a waste aluminium foil

et al. 2020

View full text Add to dashboard Cite

show abstract

Synthesis of high quality zeolites from coal fly ash: Mobility of hazardous elements and environmental applications

Cited by 93 publications

References 36 publications

LTA zeolite synthesis using natural materials and its evaluation by Green Star methodology

LTA zeolite synthesis using natural materials and its evaluation by Green Star methodology

Impact of Fly Ash Fractionation on the Zeolitization Process

Insights into the competitive adsorption of pollutants on a mesoporous alumina–silica nano-sorbent synthesized from coal fly ash and a waste aluminium foil

Contact Info

Product

Resources

About