Hydrothermal synthesis of hydroxy sodalite from fly ash for the removal of lead ions from water

Golbad, Saeed; Khoshnoud, Parisa; Abu‐Zahra, Nidal

doi:10.1007/s13762-016-1133-x

Cited by 44 publications

(25 citation statements)

References 31 publications

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“…Zeolites have different mineral phase structures; thus, their synthesis pathway should be tailored to obtain a particular phase for a given application. Molecular sieving, shape selectivity, sorption, and ion-exchange capacity are some of the unique characteristics of zeolites that make their application valuable in important industrial processes [2][3][4]. By the nature of their synthetic pathways, the conventional production of zeolites in large quantities is a challenge associated with the use of commercial compounds as feedstocks, which results in the high cost of zeolite products [5,6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hydroxy Sodalite from Coal Fly Ash for Biodiesel Production from Waste-Derived Maggot Oil

et al. 2019

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Zeolites are aluminosilicate crystalline materials known for their unique characteristics, and have been prominent for nearly half a century due to their wide and important industrial applications. The production of zeolites, however, remains a challenge due to the high cost of commercial reagents conventionally used as feedstocks. In the current study, hydroxy sodalite (HS) zeolite samples were synthesised from coal fly ash feedstock by a direct hydrothermal synthesis method. The effects of hydrothermal crystallisation synthesis time on phase crystallinity, crystal size, and morphology of the formed HS were investigated. The prepared samples were characterised using XRD, SEM, EDS and FT-IR techniques. The XRD results of the samples prepared with varying synthesis times confirmed the formation of HS from low to high phase purity and crystallinity from 11 to over 98%. The SEM results reflected gradual variation in crystal morphology, of which highly crystalline HS samples were associated with hexagonal-cubic and cubic-platelet crystals. The FTIR, depicting zeolite characteristics of T-O and T-O-T stretching vibrations in the molecular framework, further confirmed the formation of HS zeolites for samples obtained above the 24-h synthesis time. These zeolite samples were then evaluated for their catalytic activities in the conversion of maggot oil to biodiesel. The application of the various hydroxy sodalite samples for the transesterification of maggot oil yielded up to 84.10% biodiesel (FAME) with physicochemical properties that were in compliance with the biodiesel specification standards. This study investigated the novel use of a coal fly ash-derived, heterogeneous HS catalyst in biodiesel production from maggot oil, and indicates its potential to enhance biodiesel yield and quality upon process optimisation tests.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Hydroxy Sodalite from Coal Fly Ash for Biodiesel Production from Waste-Derived Maggot Oil

et al. 2019

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“…The interest of using fly ash in different applications is evident because of its many advantages; such as low density, low cost, smooth spherical surface, well distributed internal stresses, and good processability of the filled materials . Although many researchers have recognized the reinforcing effect of fly ash for polymers , few publications focused on the fly ash composites performance dependency on its particle size. Kulkarni et al reported that the performance of cenosphere/ABS composites is a function of fly ash particle size.…”

Section: Introductionmentioning

confidence: 99%

The effect of particle size of fly ash (FA) on the interfacial interaction and performance of PVC/FA composites

Khoshnoud

Abu‐Zahra

2018

Vinyl Additive Technology

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In this study, the effect of particle size of fly ash (FA) on the interfacial interaction between the filler particles and the polymer matrix is investigated. Structural and physical characterization of FA with different particle sizes show that its chemical composition is highly dependent on the particle size. The mechanical, dynamicmechanical, structural, and microstructural properties of the composites are evaluated. Interfacial interaction between FA particles and the polymer matrix is assessed experimentally using a nanoindenter and numerically using two different models developed by Pukanszky and Kubat. The composites reinforced with smaller particles exhibit better mechanical, viscoelastic, and microstructural properties. Structural and interfacial studies show that, although the characterized amount of silicon oxide in the small particles is lower than the large particles, the concentration of -OH group in SiO 2 is particle-size and surface-area dependent. Therefore, smaller particle inclusions result in better interfacial interaction and improved properties. This observation is consistent with the numerically estimated interfacial interaction. J. VINYL ADDIT. TECHNOL., 00:000-000,

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“…For this reason, numerous studies have been investigating the adsorption by using low-cost sorbents. Various sorbents are used to remove heavy metals: biomass, activated carbon, red clay, zeolites, magnetite, aluminium, carbon nanotubes, chitosan, copper, iron, manganese and zinc oxides, aluminium sorbents, bentonite (Bhatia et al, 2017;Badawi et al, 2017;Golbad et al, 2017;Kocaoba & Arisoy, 2018;Zou et al, 2019). Oak bark, mahogany bark, lignin, rice shells, clay, modified peat, bamboo pulp, sawdust, active sewage sludge, modified wool, palm tree waste fibres, saffron flower waste etc.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Lead and Iron Removal from Groundwater Using Sapropel and Quartz Sand

Heang

Albrektienė

Paliulis

2020

International Conference “Environmental Engineering”

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In Prey Nop district of Cambodia, a district in coastal area, it was observed that concentration of iron and lead in groundwater was higher than permissible values. Lead is a highly toxic heavy metal, while iron is an element causing several problems related to the deterioration of taste and aesthetic appearance of water and the capacity reduction of water supply pipelines. Therefore, this article investigates the effectiveness of the technology for removing lead and iron from groundwater using the cheapest materials like sapropel and sand. In this study, different doses of sapropel (0.1, 0.2, 0.4, 0.5, 0.6, 0.8, 1, 2, 3, 4, 5 and 6 g/L), different durations of sorption processes (30, 60, 90, 120 and 150 min) and a laboratory bench for iron filtration filled with quartz sand were used for lead and iron ions removal. Results from the bench tests showed that both iron and lead were removed at efficiencies of 70 and 97%, and their concentrations did not exceed the permissible levels by using the lowest dose of 0.1 g/L of sapropel for sorption of lead and filtration through quartz sand filters for iron removal.

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Hydrothermal synthesis of hydroxy sodalite from fly ash for the removal of lead ions from water

Cited by 44 publications

References 31 publications

Synthesis of Hydroxy Sodalite from Coal Fly Ash for Biodiesel Production from Waste-Derived Maggot Oil

Synthesis of Hydroxy Sodalite from Coal Fly Ash for Biodiesel Production from Waste-Derived Maggot Oil

The effect of particle size of fly ash (FA) on the interfacial interaction and performance of PVC/FA composites

Investigation of Lead and Iron Removal from Groundwater Using Sapropel and Quartz Sand

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