Adsorption of indole on KOH-activated mesoporous carbon

Mitome, Takahito; Uchida, Yoshiyuki; Egashira, Yasuyuki; Hayashi, Kazuyuki; Nishiura, Akio; Nishiyama, Norikazu

doi:10.1016/j.colsurfa.2013.02.022

Cited by 38 publications

(20 citation statements)

References 21 publications

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“…a diffraction peak at around 0.9 was observed in OMC and KOMC-3 samples, confirming the ordered mesoporous structure. However, the peak intensity decreased after KOH activation, indicating a decline in the ordered mesoporous structure, consistent with the results of Mitome et al [31].…”

Section: Characteristics Of Komcssupporting

confidence: 92%

Synthesis and Adsorption Performance of a Hierarchical Micro-Mesoporous Carbon for Toluene Removal under Ambient Conditions

Kong

Zhang

et al. 2020

Materials

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Ordered mesoporous carbons (OMCs) were synthesized in this study through a soft template method and then activated by employing different mass ratios of KOH/OMCs to obtain KOH-activated ordered mesoporous carbons (KOMCs) with hierarchical pore structures. To verify the adsorption capacity, the KOMCs have been subjected to toluene emission-reduction experiments. The KOMCs were characterized by TEM, XRD, N2 adsorption-desorption isotherms, and Raman spectroscopy. The pore structure of OMCs was found to be effectively optimized by the activation with KOH, with the BET-area and total pore volume values reaching as high as 2661 m2 g−1 and 2.14 cm3 g−1 respectively. Then, the dynamic adsorption capacity of toluene on KOMCs was investigated via breakthrough curves, which can be well described by the Yoon and Nelson (Y-N) model. The dynamic adsorption capacities of toluene exhibit the following order: OMC < KOMC-1 < KOMC-5 < KOMC-3. The sample activated by KOH/OMC with a mass ratio of 3:1 (KOMC-3) demonstrated the highest toluene adsorption capacity of 355.67 mg g−1, three times higher in comparison with the untreated carbon (104.61 mg g−1). The modified hierarchical porous carbons also exhibited good recyclability. The KOMCs with rich pore structure, high toluene adsorption capacity, and superior reusability thus display a huge potential for volatile organic compound (VOC) elimination.

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Section: Characteristics Of Komcssupporting

confidence: 92%

Synthesis and Adsorption Performance of a Hierarchical Micro-Mesoporous Carbon for Toluene Removal under Ambient Conditions

Kong

Zhang

et al. 2020

Materials

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“…Adsorption is known to be simplest and cheap method for the treatment of organic compounds in wastewater. For the adsorptive removal of indole, few studies have been reported in the literature (Table S1 in Supporting Information) with various adsorbents such as activated carbon , cobalt(II)‐carboxylated diaminoethane sporopollenin , zeolite , activated alumina and nickel‐based adsorbent , and molecular sieve Ti‐HMS . Few other studies have been reported in the literature emphasizing on other aspects of indole adsorption.…”

Section: Introductionmentioning

confidence: 99%

“…Density functional theory (DFT) modeling for hydrodenitrogenation of indole over Mo 2 C catalyst was done to give its mechanistic events . Recently, indole adsorption on KOH‐activated mesoporous carbon was carried out to improve efficiency of adsorbent where significant removal was obtained by this activation .…”

Section: Introductionmentioning

confidence: 99%

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Comparative studies on adsorptive removal of indole by granular activated carbon and bagasse fly ash

Hiwarkar

Srivastava

Mall

2014

Environ. Prog. Sustainable Energy

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In the present article, comparative studies were performed for the adsorptive removal of indole by granular activated carbon (GAC) and bagasse fly ash (BFA) in batch system. Experiments were conducted to study and optimize various operational parameters such as adsorbent dose, contact time, pH, and temperature. BFA was found to work more effectively over wide pH range for indole removal than GAC. Optimum dose and equilibrium time for GAC were found to be 20 g L−1 and 7 h, whereas, respective values for BFA were 7 g L−1 and 3 h. The adsorption equilibrium was well described by Redlich and Peterson isotherm. Kinetic data was best represented for pseudo‐second order kinetic model. Indole adsorption onto GAC and BFA was found to be endothermic in nature. Values for entropy change and heat of adsorption for GAC were found as 101.30 kJ mol−1 K−1 and 12.42 kJ mol−1 whereas for BFA respective values were 198.88 kJ mol−1 K−1 and 32.22 kJ mol−1. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 492–503, 2015

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“…The adsorption method, 7 membrane separation method, 8 supercritical water oxidation, 9 ozone oxidation, 10 ultraviolet radiation, 11 photocatalytic oxidation, 12 electrocatalytic oxidation, 13 wet oxidation 14 and biological method can treat quinoline containing oily wastewater and coking wastewater. 15 Comparatively, the technique of catalytic wet hydrogen peroxide oxidation (CWPO) has aroused much attention in water treatment as characterized by high effectivity, fast reaction rate and no secondary pollution in the quinoline oxidation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcination Temperature on Catalytic Performance of CeCu Oxide in Removal of Quinoline by Wet Hydrogen Peroxide Oxidation from Water

Jiao¹,

Zhou²,

Zhang³

et al. 2018

J. Braz. Chem. Soc.

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A facile citric acid-mediated complexation-calcination approach is reported in this paper to prepare the CeCu oxide composite with a porous structure that is highly efficient and durable for treating simulated quinoline wastewater by catalytic wet hydrogen peroxide oxidation (CWPO). As the results indicate, Cu species can be dissolved in CeO 2 lattice to fabricate a solid solution. The calcination temperature is critical for an optimum catalyst structure and catalytic performance. As found in investigating the structure and catalytic performance of the CeCu oxide prepared at calcination temperatures ranging from 350 to 750 °C, the optimum temperature is 650 °C, at which a loose surface, a porous structure and considerable adsorbed surface oxide/hydroxyl oxide species are fabricated over the catalyst. This resultant catalyst also takes on the optimal performance with an oxidation conversion reaching 98% for quinoline, a removal efficiency of 80.6% for total organic carbon (TOC) and a low Cu 2+ leaching value of 19.3 mg L -1. Besides, the high performance is maintained by the catalysts in a wide pH range of 5.1-10.5. This work generally provides an efficient way to design and fabricate the catalyst for CWPO reaction, which can also be applied in other reactions.

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Adsorption of indole on KOH-activated mesoporous carbon

Cited by 38 publications

References 21 publications

Synthesis and Adsorption Performance of a Hierarchical Micro-Mesoporous Carbon for Toluene Removal under Ambient Conditions

Synthesis and Adsorption Performance of a Hierarchical Micro-Mesoporous Carbon for Toluene Removal under Ambient Conditions

Comparative studies on adsorptive removal of indole by granular activated carbon and bagasse fly ash

Effect of Calcination Temperature on Catalytic Performance of CeCu Oxide in Removal of Quinoline by Wet Hydrogen Peroxide Oxidation from Water

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