Structural analysis of zeolite NaA synthesized by a cost-effective hydrothermal method using kaolin and its use as water softener

Loiola, Adonay R.; Andrade, J.C.R.A.; Sasaki, J. M.; Silva, L.R.D. da

doi:10.1016/j.jcis.2010.11.026

Cited by 178 publications

(82 citation statements)

References 33 publications

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“…This is consistent with the literature [12][13][14]. The FT-IR of the zeolitic porous material showed the appearance of the following absorption bands at 462.83 cm -1 corresponding to the TO vibrations; 546.72 cm -1 which corresponds to the vibrations of the skeleton TOT and 1034.62 cm -1 which corresponds to the Si-OH vibrations, and they are consistent with the literature [11] (Figure 2b).…”

Section: Ft-ir Analysissupporting

confidence: 91%

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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Section: Ft-ir Analysissupporting

confidence: 91%

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 batches' composition was calculated stoichiometricaly with a reaction mixture of 3Na 2 O -Al 2 O 3 -xSiO 2 -H 2 O, with values of x in the range of 3.5 to 5.0 mol. In the second series of experiments, the following conditions of synthesis were evaluated: temperature (90, 95, 100 and 115 °C at 20-hour) and time (6,20,24 and 48 hours at a 90 °C). The samples were based on molar composition 4Na 2 O -Al 2 O 3 -4SiO 2 -H 2 O using 2.18 g of metakaolin waste material, 1.569g NaOH and 4.157 g of Na 2 O. SiO 2 .5H 2 O.…”

Section: Synthesismentioning

confidence: 99%

“…Traditionally, these microporous materials are commonly produced from hydrogels aluminates and sodium silicates; however, the production of zeolites from alternative sources of silica and alumina such as ash 2 , volcanic glasses 3 , diatomites 4 and clays 5 , continue to be investigated. Among the clays, several investigators have studied the preparation of zeolite from kaolin and have been successful in the synthesis of zeolites, mainly NaA [6] , mordenite 7 , faujasites 8 , and zeolite NaP 9,10 . According to the International Zeolite Association (IZA) 11 zeolite NaP has a GIS (gismondine) structure type showing small pores.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of zeolite NaP using kaolin waste as a source of silicon and aluminum

et al. 2014

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The synthesis of zeolite NaP using kaolin waste, from the Amazon region, as a predominant source of silicon and aluminum has been studied. The zeolitisation process occurred in hydrothermal conditions using static autoclaving and the effects of time, temperature, and the Si/Al ratio were investigated. The starting material and the phases formed as reaction products were characterized by XRD, SEM and FTIR. The results showed that pure zeolite NaP is hydrothermally synthesized, at 100 °C for 20 hours, using metakaolin waste material in alkaline medium in presence of additional silica. The XRD and SEM analyses indicate that the synthesized zeolite presents good crystallinity.

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“…Zeolite also has a high adsorption activity and typical molecular sieve properties. It is also used as water softener (Loiola et al, 2012). However, it was used in combination with bentonite for increasing sedimentation of the composite sorbent.…”

Section: +mentioning

confidence: 99%

Water Filter Fabrication from a Mixture of KMnO<sub>4</sub> Modified Kapok Carbon Fiber, Zeolite, Bentonite and Clay for Fe<sup>3+</sup>Removal and Water Hardness Treatment

Thongdee¹,

Parun²,

Benjatitmongkhon³

et al. 2017

American Journal of Applied Sciences

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A water filter was fabricated from a mixture of KMnO 4 modified kapok carbon fiber, zeolite, bentonite and kaolinite clay for Fe 3+ removal and water hardness treatment. The effects of amount of KMnO 4 modified kapok carbon fiber (30-60 wt%), zeolite (20-40 wt%) and sintering temperature (500-700°C) on the properties of sintered products were evaluated. The best of sintered products were tested for treatment of solutions with 5 mg L −1 Fe 3+ and 40-200 mg L −1 total water hardness. The results show that the physical properties of the sintered products were affected by the contents of KMnO 4 modified kapok carbon fiber and sintering temperature. The linear drying shrinkages of the mixture of raw materials increase with increasing content of modified kapok carbon fiber amounts due to the effect of water amount used for mixing process. Furthermore, firing shrinkages of sintered products increased with increasing sintering temperature for the same ratio of raw materials. Finally, the firing shrinkages and density of sintered products decrease with increasing content of the modified kapok carbon fiber at constant sintering temperature. It was shown that the sintered product made with 40 wt% of KMnO 4 modified kapok carbon fiber and sintered at 600°C is suitable for filter fabrication. The KMnO 4 modified kapok carbon fiber filter could adsorb 5-6% more Fe 3+ at equilibrium than filter made with kapok carbon fiber. The Fe 3+ was removed by adsorption and precipitation processes. The Fe 3+ adsorption process of modified kapok carbon fiber filter was fitted to the Langmuir model with maximum adsorption capacity of 53.76 mg g −1 . For hardness removal, the Ca for Mg 2+ and 28.1-123.5 mg g −1 for HCO 3¯, respectively.

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Structural analysis of zeolite NaA synthesized by a cost-effective hydrothermal method using kaolin and its use as water softener

Cited by 178 publications

References 33 publications

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

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

Synthesis and characterization of zeolite NaP using kaolin waste as a source of silicon and aluminum

Water Filter Fabrication from a Mixture of KMnO<sub>4</sub> Modified Kapok Carbon Fiber, Zeolite, Bentonite and Clay for Fe<sup>3+</sup>Removal and Water Hardness Treatment

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