Preparation of granulated LTA and SOD zeolites from mechanically activated mixtures of metakaolin and sodium hydroxide

Prokof’ev, V. Yu.; Gordina, N. E.

doi:10.1016/j.clay.2014.07.008

Cited by 44 publications

(24 citation statements)

References 26 publications

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“…The Qe value for the S-24; S-48; and S-standard samples are comparable at ~ 95 -100 mg/g. These results are higher when in comparison to the adsorption capacity (Qe) of the sodalite pellets and activated carbons, ~ 10 mg/g [16].…”

Section: Effects Of Contact Timementioning

confidence: 77%

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Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

Wahyuni

Prasetyoko

Suprapto

et al. 2019

Bull. Chem. React. Eng. Catal.

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Indonesian kaolin was used as precursor for synthesis of sodalite. Synthesis parameters were optimized by varying the Si/Al ratios, stirring and aging conditions, and water composition. X-ray diffraction (XRD), Fourier Transform Infra Red (FTIR), Scanning Electron Microscope-Energy Dispersive Xray (SEM-EDX), and Particle Size Analyzer (PSA) were used to characterize sodalite. The potential of sodalite as adsorbent for heavy metal Pb 2+ ions removal from waste water was investigated in this work. The uptake adsorption capacities of sodalite was 90-100 mg/g from synthesized sodalite crystallized for 24 and 48 hours, and commercial silica. The kinetic of Pb 2+ adsorption was a pseudo second order reaction and the adsorption coefficients was followed Langmuir adsorption isotherm. ous damage to nervous system, kidney function and reproduction organ [1]. It also affects hematopoietic, renal, gastrointestinal, and cardiovascular [2]. Removal of lead from waste water using reverse osmosis, precipitation, ion exchange and electro dialysis have been investigated and were proven effective [1,[3][4][5][6]. However, the processes were economically demanding and the waste deposit resulted from the removal processes were still required for additional disposal treatment.Sorption using solid adsorbents offers a better solution for waste water treatment which in-

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Section: Effects Of Contact Timementioning

confidence: 77%

“…Synthesis sodalite from rice hush ash without organic template resulting sodalite with nanocrystal size [15]. Sodalite was also synthesized from kaolinite which required treatment with NaOH prior to synthesis in order to activate kaolinite into metakaolin [16].…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

Wahyuni

Prasetyoko

Suprapto

et al. 2019

Bull. Chem. React. Eng. Catal.

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“…In , we have studied the synthesis of granulated binder‐free NaA zeolite from the mechanically activated mixture of metakaolin and sodium hydroxide. The thermal treatment of the pellets is one of the key stages of the synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…At this stage, both the increase in pellets strength and the formation of new phases occur. It was demonstrated that changes in phase composition during thermal treatment start at temperatures above 400°C. At these temperatures, unreacted sodium hydroxide and metakaolin interact to form various sodium aluminosilicates.…”

Section: Introductionmentioning

confidence: 99%

Isoconversional Kinetics of Thermal Processes in Mixtures Based on Metakaolin and Sodium Hydroxide

Prokof’ev

Gordina

Khramtsova

et al. 2018

Int J of Chemical Kinetics

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This study investigated the thermal behavior of the mixtures 6Al2Si2O7: 12NaOH and 6Al2Si2O7: 12NaOH: 2Al2O3 which are designed for synthesis of LTA (Linde type A) zeolite. XRD, SEM, and Synchronous thermal analysis (STA) have been used. It was found that after evaporating suspensions, molding pellets, and drying, small amounts of LTA and sodium hydroaluminates have been formed in the sample. The removal of crystallization water occurs on heating up to 400°C. In the temperature range from 400 to 850°C, Na6Al4Si4O17 and Na8Al4Si4O18 are synthesized by interaction of metakaolin with sodium hydroxide. The formation of mullite and nepheline is also observed. It was shown that preactivation of powders in the vibratory mill allows reducing the starting temperature of synthesis at 50–100°C. For the range 400–850°C using Ozawa–Flynn–Wall analysis, the values of apparent activation energy and preexponential factor have been calculated. It was established that the apparent activation energy for mixtures without preactivation made 200–290 kJ mol−1. After preactivation, E values decreased to 130–170 kJ mol−1. Also it was shown that alumina excess inhibits nepheline and mullite formation.

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“…The kaolinitic powder (45 μm) was calcined at the temperature of 600 °C for four hours and converted to the metakaolin form [10,11] which was then transferred to a polyethylene flask and treated with an 8 M sodium hydroxide solution in the ratio of 1:5 at the temperature of 90 °C for four hours. The product obtained was washed several times to a neutral pH with distilled water and then filtered and dried for three hours in an oven at the temperature of 110 °C.…”

Section: Preparation Of the Zeolitic Porous Materialsmentioning

confidence: 99%

Preparation and characterization of an efficient zeolitic material from a local natural kaolinitic clay and its uses in the elimination of an organic dye

Chinar

Benbouzid

2016

Eur. J. Chem.

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The zeolitic porous material was prepared from kaolinitic clay (DD1 from Gebel Debbagh, Algeria) using a cheap and easy process to insert a sodium ion into the kaolinitic clay structure. The obtained zeolitic Linde Type-A (LTA) material was characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and X-ray diffraction techniques. The adsorption capacity of the zeolitic porous material was tested with methylene blue. The best correlation of experimental results was obtained with the Langmuir model giving a Qmax of 11.5 mg/g indicating a favorable process for the adsorption of the dye. KEYWORDS

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Preparation of granulated LTA and SOD zeolites from mechanically activated mixtures of metakaolin and sodium hydroxide

Cited by 44 publications

References 26 publications

Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

Isoconversional Kinetics of Thermal Processes in Mixtures Based on Metakaolin and Sodium Hydroxide

Preparation and characterization of an efficient zeolitic material from a local natural kaolinitic clay and its uses in the elimination of an organic dye

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