Red mud as aluminium source for the synthesis of magnetic zeolite

Belviso, Claudia; Kharchenko, Anastasia; Agostinelli, E.; Cavalcante, Francesco; Peddis, Davide; Varvaro, G.; Yaacoub, Nader; Mintova, Svetlana

doi:10.1016/j.micromeso.2018.04.038

Cited by 69 publications

(28 citation statements)

References 51 publications

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“…Increasing crystallinity and grain size of the zeolite strongly depends on the Si/Al molar ratio [26,38]. As a result of utilizing different precursors from disposed of raw aluminum waste, distinguished changes in the morphology of the samples was due to change in Si/Al molar ratio for the zeolite samples.…”

Section: Sem and Edx Analysismentioning

confidence: 99%

Facile and affordable synthetic route of nano powder zeolite and its application in fast softening of water hardness

El-Nahas

Osman

Arafat³

et al. 2020

Journal of Water Process Engineering

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Herein, we proposed an affordable and facile way of treating the hardening of water from local groundwater and seawater sources. This was facilitated by synthesizing zeolitic materials via an effortless and affordable method from readily available disposed of waste materials. Firstly, by converting waste aluminium (scrap wire cables, takeaway foil, cans, and spray aerosol bottles) along with disposed of silica gel into active zeolitic materials with the aid of a conventional domestic microwave. Small amounts of the produced zeolites (NaX and NaA) were utilized in the removal of the hardness of water (10 g.L-1), showing elimination of Ca 2+ and Mg 2+ ions within 30 minutes, removing 90% of the total hardness (> 1000 ppm). The spent zeolite samples can be further used for more than two consequent cycles, then the regeneration can be promoted by using NaCl solution at ambient conditions. The total price for the synthesis of 1 kg of the zeolite produced herein is 14 $/kg. This is 70% lower than the price of commercial zeolites available in the market. Our proposed facile route in zeolite preparation could potentially change the traditional costly softening treatment techniques. It also minimizes the use of extra chemical materials, templates and multistep procedures. The excellent hardness removal capacity in groundwater and seawater using synthesized zeolite samples could open doors for various applications.

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Section: Sem and Edx Analysismentioning

confidence: 99%

Facile and affordable synthetic route of nano powder zeolite and its application in fast softening of water hardness

El-Nahas

Osman

Arafat³

et al. 2020

Journal of Water Process Engineering

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“…Belviso et al, also studied zeolite synthesis from low cost materials: zeolite A and X from fly ash by NaOH fusion, 23 sodalite, faujasite, and zeolite A from different aluminosilicates combining hydrothermal synthesis and alkaline fusion 24 . In their latest work, faujasite and sodalite were synthesized using red mud, the residual material from the alkaline lixiviation from bauxite 25 . These investigations prove that it is possible to synthesize useful zeolites from low cost materials as long as the important process parameters are understood.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and ion exchange of zeolites produced from kaolin for separation of oxygen from atmospheric air

Feltrin

Souza

Aquino³

et al. 2021

Int J Applied Ceramic Tech

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Lithium‐based zeolites are the most commonly used materials in PSA (pressure swing adsorption) oxygen concentration from atmospheric air. Synthesizing these adsorbents using mineral raw materials adapts to worldwide environmental requests, as only high‐purity chemical reactants such as aluminates and silicates are usually used. The present work aims to synthesize and characterize zeolites using kaolin as raw material by studying the influence of the metakaolinization temperature and SiO2/Al2O3 and H2O/Na2O molar ratios by experimental design. Ion exchange was used to incorporate lithium into synthesized zeolites. Kaolin was treated thermically and characterized, and zeolites were synthesized by a hydrothermal reaction. After synthesis, ionic exchange of Na+ ions by Li+ was performed. The results indicated the presence of three main phases, zeolites A, X, and P. Using ANOVA, it was found that the factors that contributed significantly to the formation of zeolite X were the H2O/Na2O and SiO2/Al2O3 molar ratios. For zeolite A, the major influence was by the metakaolinization temperature and for zeolite P none of the factors was influential. Zeolites that incorporated higher amounts of lithium showed higher N2 adsorption potential, indicating that even without pure phases formed, it was possible to obtain similar adsorption efficiency to commercial zeolite.

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“…According to the U.S. Geological Survey [62], the annual production of natural zeolites ranges from 1-1.3 million tons and it has remained essentially constant over the years. Literature data documented the formation of synthetic zeolites using several raw materials ranging from natural minerals [63][64][65][66][67][68][69][70] to waste materials [71][72][73][74][75][76][77][78] or pure silica and alumina sources [79,80]. Moreover, zeolites have been synthesised using different methods such as conventional and pre-fused hydrothermal processes [81][82][83], ultrasonic or microwaves methods [84][85][86][87][88][89][90] and multi-step technology [91,92].…”

Section: Natural and Synthetic Zeolitementioning

confidence: 99%

Zeolite for Potential Toxic Metal Uptake from Contaminated Soil: A Brief Review

Belviso

2020

Processes

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Soil pollution is an increasingly urgent problem for the global environment. Soil can be contaminated with potential toxic metals from many anthropogenic activities, besides fossil fuel combustion and crude oil production, ranging from industry to mining and agriculture. Many technologies have been analysed to solve this type of environmental pollution and methods involving the use of minerals (e.g., clay minerals, zeolites, and natural silica adsorbents) are widely described in the literature. This article provides a summary of studies concerning the use of zeolites in soil remediation. A considerable number of these experiments were conducted using natural zeolites, while fewer concerned the utilization of synthetic zeolites. The mechanism controlling the successful application of these minerals was analysed through referring to global data published on this topic over the last few decades. This review also briefly discusses the limitations on zeolite applications and the drawbacks of the approaches analysed.

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Red mud as aluminium source for the synthesis of magnetic zeolite

Cited by 69 publications

References 51 publications

Facile and affordable synthetic route of nano powder zeolite and its application in fast softening of water hardness

Facile and affordable synthetic route of nano powder zeolite and its application in fast softening of water hardness

Synthesis and ion exchange of zeolites produced from kaolin for separation of oxygen from atmospheric air

Zeolite for Potential Toxic Metal Uptake from Contaminated Soil: A Brief Review

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