Synthesis of Mordenite from Diatomite and its Application for VOCs Adsorption

Johan, Erni; Matsue, Naoto

doi:10.14723/tmrsj.39.23

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…12), 13) Among the various raw materials, diatomite has been reported as a material for the synthesis of artificial mordenite at low cost without the addition of a template or a seed. 14), 15) Furthermore, preparation of a composite material of artificial mordenite and magnetite also seems possible by using our method. 9) In this study, we investigated the synthesis conditions of the mordenite from various diatomites as raw materials and the composite material of the mordenite and the magnetite.…”

Section: Introductionmentioning

confidence: 88%

Preparation of mordenite and its composite material with nano-sized magnetite from diatomites for radioactive Cs decontamination

Yamada

Johan

Matsue

et al. 2015

J. Ceram. Soc. Japan

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Mordenite was artificially synthesized using various diatomites for radioactive Cs decontamination. A high CEC (Cation Exchange Capacity) value was obtained when the diatomite had a high Al/Si elemental ratio. The Cs + adsorption rate from 100 ppm Cs solution for the synthesized mordenite (1.0 g) was ca. 100% and ca. 83% in 100 mL of water and seawater, respectively. The composite powder material consisting of mordenite and nano-sized magnetite was synthesized from a mixed slurry of the diatomite and nano-sized magnetite. Magnetic collection rate for the composite material using a neodymium magnet was larger than 90% for the 20 and 30 wt % magnetite-containing composite materials. The total Cs decontamination rates using magnetic collection after the Cs + adsorption in water were 92.7% and 97.2% for the 20 and 30 wt % magnetite-containing composite material, respectively.

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Section: Introductionmentioning

confidence: 88%

Preparation of mordenite and its composite material with nano-sized magnetite from diatomites for radioactive Cs decontamination

Yamada

Johan

Matsue

et al. 2015

J. Ceram. Soc. Japan

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“…The preparation of artificial mordenite is necessary in order to improve the Cs + ion adsorption ability and to synthesize the composite material. In previous studies, the mordenite has been artificially synthesized from commercial chemical reagents or a natural raw material called diatomite [13][14][15][16][17]. In many cases, the mordenite has been prepared using a template agent, such as diethanolamine (DEA) and/or a seed powder of the same zeolite.…”

Section: Introductionmentioning

confidence: 99%

Cs⁺ decontamination properties of mordenites and composite materials synthesized from coal fly ash and rice husk ash

Aono

Kunimoto

Takahashi

et al. 2018

Journal of Asian Ceramic Societies

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Mordenites were synthesized using the natural resource such as coal fly ash and rice husk ash. The Cs + adsorption rate (100 ppm Cs + , 100 mL) in seawater for the prepared mordenite (1.0 g) was 83.2%. The Cs + adsorption rate for these mordenites almost depended on the calculated Cs + exchangeable value (mmol) using the cation exchange capacity (CEC) values. Composite powder materials consisting of mordenite and nanosized magnetite (Fe 3 O 4 ) (10, 20, 30 wt%) were also synthesized from coal fly ash and rice husk ash. The total Cs + decontamination rates using the magnetic collection after the Cs + adsorption in water and seawater were ca. 90% and ca. 70% for the examined 20 wt% magnetite-containing composite material, respectively. Although the elution ratio of the Cs + ion was ca. 8% from all of the adsorbed Cs + by the dissolution test in slowly shaken deionized water for 14 days in the case of the Cs + adsorbed composite material (20wt% magnetite), the Cs + ion did not elute when the sample was heated at 1000°C and higher temperature due to the Cs + containment in the glassy phase.

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“…11) Besides being made from chemical reagents, zeolites can be synthesized from industrial wastes such as coal fly ash 12)14) and natural resources such as diatomite, 15), 16) and the obtained zeolites are usually called artificial zeolites. A Na-P1 type artificial zeolite synthesized from coal fly ash had a high ability for Cs + adsorption, and the high Cs + adsorptivity was ascribed to its 0.38 nm pore opening size which is close to the diameter of Cs + .…”

Section: Introductionmentioning

confidence: 99%

Adsorption characteristics of Cs<sup>+</sup> onto artificial zeolites synthesized from coal fly ash and diatomite

Johan

Yoshida

Munthali

et al. 2015

J. Ceram. Soc. Japan

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The radioactive decontamination of water, soil and other materials requires cheap and effective adsorbents. Artificial zeolites synthesized from an industrial waste (coal fly ash: Na-P1 type zeolite) and a natural material (diatomite: mordenite type zeolite) have a high Cs + adsorptivity in the adsorption experiments using 0.1 g of the zeolite and 50 mL of up to 7.5 mM CsCl. The coexisting cation suppressed the Cs + adsorption onto the zeolites, and the effect of the suppression was in the order,. A thermodynamic analysis proved that the Cs + adsorption onto the two zeolites was exothermic favoring a lower temperature. The artificial mordenite showed a greater Cs + adsorption strength, higher distribution coefficient and lower "G°, especially at low Cs + concentrations. Adsorption isotherm analysis by the Langmuir, Freundlich, Temkin and DubininRadushkevich models showed a greater Cs + adsorption selectivity for the artificial mordenite even at a low pH.

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Synthesis of Mordenite from Diatomite and its Application for VOCs Adsorption

Cited by 4 publications

References 9 publications

Preparation of mordenite and its composite material with nano-sized magnetite from diatomites for radioactive Cs decontamination

Preparation of mordenite and its composite material with nano-sized magnetite from diatomites for radioactive Cs decontamination

Cs⁺ decontamination properties of mordenites and composite materials synthesized from coal fly ash and rice husk ash

Adsorption characteristics of Cs<sup>+</sup> onto artificial zeolites synthesized from coal fly ash and diatomite

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Synthesis of Mordenite from Diatomite and its Application for VOCs Adsorption

Cited by 4 publications

References 9 publications

Preparation of mordenite and its composite material with nano-sized magnetite from diatomites for radioactive Cs decontamination

Preparation of mordenite and its composite material with nano-sized magnetite from diatomites for radioactive Cs decontamination

Cs+ decontamination properties of mordenites and composite materials synthesized from coal fly ash and rice husk ash

Adsorption characteristics of Cs<sup>+</sup> onto artificial zeolites synthesized from coal fly ash and diatomite

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Cs⁺ decontamination properties of mordenites and composite materials synthesized from coal fly ash and rice husk ash