Preparation of Mesoporous Activated Carbons by Chemical Activation of Acid- and Base-Pretreated Bamboos for Removal of Bulky Dye Molecules

Hata, Motohide; Amano, Yoshimasa; Machida, Motoi; Imazeki, Fumio

doi:10.5985/jec.25.79

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…Elution tests were performed for Z6 and Z6-Q to investigate the adsorption mechanism of nitrate ion and the feasibility of regenera- The activation with high impregnation ratio could generally produce large pore 16) and this tendency could be slightly observed in this study as well. There was not large difference in porous properties between untreated and CH 3 I treated sample.…”

Section: Elution Testmentioning

confidence: 75%

Surface modification of carbonized melamine sponge by methyl iodide for the efficient removal of nitrate ions

Goto

Amano

Machida

2017

TANSO

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a), b) and Motoi Machida a),b) Melamine sponge was used to prepare carbonized materials for the adsorption of nitrate ions. Carbonization and ZnCl 2 activation of the melamine sponge were simultaneously conducted at 500 °C to develop porosity. In addition, a subsequent CH 3 I treatment was used to modify its surface. A ZnCl 2 impregnation ratio of 6 g/g (Z6) was the best condition for the removal of nitrate ions and a further increase in nitrate adsorption was observed as a result of the CH 3 I treatment (Z6-Q). Z6-Q exhibited a superior nitrate ion adsorption capacity of 0.81 mmol/g which was approximately 1.3 times that of Z6. The adsorption of nitrate ions on the prepared samples was found to be the highest under acidic conditions, while basic conditions were not suitable due to inhibition by the hydroxide ions. In the pH range 1.5 to 2.5, the initial concentration of chloride ions increased and caused competition with nitrate ion adsorption. Based on the adsorption isotherms of nitrate ions, the adsorption processes were well fitted to the Langmuir equation. The TG/DTG profile revealed thermal decomposition of quaternary ammonium and adsorbed nitrate ions. After 3 regeneration cycles, the amounts of adsorbed nitrate ions for Z6 and Z6-Q were respectively 95 and 98% of the initial values, implying that the adsorbents are recyclable.

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Section: Elution Testmentioning

confidence: 75%

Surface modification of carbonized melamine sponge by methyl iodide for the efficient removal of nitrate ions

Goto

Amano

Machida

2017

TANSO

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“…OMC(MCF) had high surface area of 1073 m 2 /g. Moreover, the average pore size of OMC (MCF) (5.7 nm) is greater than that of PR and DB71 (3.0 nm) [14]. Therefore, PR or DB71 molecules can be easily diffuse into the pore of OMC(MCF).…”

Section: Re Sults and Discussionmentioning

confidence: 99%

Dyes adsorption properties of odered mesoporous carbon material using MCF silica as hard template

Nguyen¹,

Linh²,

Bui³

et al. 2022

Vietnam j. catal. adsorp.

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Ordered mesoporous carbon materials using MCF silica as hard template (OMC(MCF)) were synthesized. The synthesized OMC(MCF) materials were characterized by different techniques such as XRD, TEM, BET. The results revealed that the surface area, pore volume and pore size of OMC (MCF) were of 1,073 m2 /g, 1.35 cm3 /g and 5.7 nm, respectively. The dye adsorption experiments were carried out through a batch test to evaluate synthesized OMC(MCF) materials. Methylene blue (MB- cationic dye), phenol red (PR - anionic dye) and direct blue 71 dyes (DB71- anionic dye) were chosen as adsorbates. Negatively charged surfaces OMC(MCF) materials have better adsorption capacity for positively charged methylene blue than that of negatively charged direct blue 71 and phenol red. OMC(MCF) materials could be used as a potential adsorbent for the removal of positive charged organic dyes.

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Characterization of High-Performance Zinc Chloride Activated Biochar Modified by Thermal Chemical Vapor Deposition (CVD) and Its Removal Mechanism of Aqueous Nitrate Ions

2022

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Preparation of Mesoporous Activated Carbons by Chemical Activation of Acid- and Base-Pretreated Bamboos for Removal of Bulky Dye Molecules

Cited by 4 publications

References 31 publications

Surface modification of carbonized melamine sponge by methyl iodide for the efficient removal of nitrate ions

Surface modification of carbonized melamine sponge by methyl iodide for the efficient removal of nitrate ions

Dyes adsorption properties of odered mesoporous carbon material using MCF silica as hard template

Characterization of High-Performance Zinc Chloride Activated Biochar Modified by Thermal Chemical Vapor Deposition (CVD) and Its Removal Mechanism of Aqueous Nitrate Ions

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