Book ChapterDOI
Influence of Surface Oxides of Carbonaceous Adsorbent on Liquid-Phase Desorption Characteristics of Aromatic Compound
Hajime Tamon,Morio Okazaki +1 more
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In this article, the influence of surface oxides of carbonaceous adsorbent on the liquid phase desorption characteristics of aromatic compounds was experimentally determined, and it was found that the regeneration ratio by ethanol is improved by wet oxidation except adsorption of amino compounds.Abstract:
The influence of surface oxides of carbonaceous adsorbent on the liquid-phase desorption characteristics of aromatic compounds was experimentally determined. Although the amount adsorbed on activated carbon, graphite and activated carbon fiber is decreased by wet oxidation, the desorption characteristics are improved. Ethanol regeneration was applied to oxidized carbon and carbon fiber. Ethanol gives the high regeneration ratio for the compounds substituted by electron-attacking groups. However, the regeneration ratio by ethanol is low for the compounds substituted by electron-donating groups. It was found that the regeneration ratio by ethanol is improved by wet oxidation except adsorption of amino compounds.read more
Citations
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Journal ArticleDOI
On the Modification and Characterization of Chemical Surface Properties of Activated Carbon: In the Search of Carbons with Stable Basic Properties
TL;DR: In this article, the surface chemical properties of hydrogen and nitrogen-treated samples of an activated carbon were quantified using several complementary techniques, including point of zero charge measurements, and showed that only H2 treatments at high temperature (>1073 K) create basic (hydrophobic) surfaces which are stable after prolonged air exposure.
Journal ArticleDOI
Adsorption–desorption characteristics of phenol and reactive dyes from aqueous solution on mesoporous activated carbon prepared from waste tires
Wiwut Tanthapanichakoon,P. Ariyadejwanich,P. Japthong,Keizo Nakagawa,Shin R. Mukai,Hajime Tamon +5 more
TL;DR: Because of its superior liquid-phase adsorption-desorption characteristics as well as higher ethanol regeneration efficiency, the prepared activated carbon is more suitable for wastewater treatment, especially for adsorbing similarly bulky adsorbates.
Book ChapterDOI
On Tailoring the Surface Chemistry of Activated Carbons for Their Use in Purification of Aqueous Effluents
TL;DR: The model of Muller, Radke and Prausnitz as mentioned in this paper was used to illustrate the possible effects of carbon surface chemistry on the adsorption of weak organic electrolytes.
Regeneration potential of activated petroleum coke for application in oil sands process-affected water
TL;DR: Acknowledgments and acknowledgments are given in this paper, along with a list of symbols and a Table of Table of Symbols (table of symbols) for each of them.
Journal ArticleDOI
Solvent Dependence of Affinity Coefficient for Phenol Adsorption on Activated Carbon
TL;DR: In this article, the solvent dependence of phenol adsorption on activated carbon based on the cluster model was studied, and it was shown that phenol adaption is dependent on the number of activated carbon atoms.
References
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Journal ArticleDOI
Role of surface acidity in the adsorption of organic pollutants on the surface of carbon
Robert W. Coughlin,Fouad S. Ezra +1 more
Journal ArticleDOI
Surface Oxides of Carbon
TL;DR: In this paper, it was found that the reaction of oxygen with microcrystalline carbon at 400-450°C yields four groups of different acidities: strongly acidic, weakly acidic, carboxyl and carbonyl groups.
Journal ArticleDOI
Equilibria for adsorption of organic compounds on activated carbons in aqueous solutions I. Modified Freundlich isotherm equation and adsorption potentials of organic compounds
TL;DR: In this paper, the distribution of adsorption potential for various organic compounds in aqueous solutions on the activated carbons were calculated from the modified Freundlich expression, logarithmic relationship of molar adsorbed amount and reduced concentration.
Journal ArticleDOI
Adsorption of phenol on surface-modified carbon black from its aqueous solution
Takeo Asakawa,Keizo Ogino +1 more
TL;DR: The adsorption equilibria of phenol on the surface modified and surface unmodified electric carbon black in aqueous solutions have been studied in this article, and the adsorbed amount is closely related to the nature of the surface oxides on the modified carbon black.
Journal ArticleDOI
Solvent regeneration of spent activated carbon in wastewater treatment.
TL;DR: In this paper, the regeneration efficiency of ethanol and toluene was investigated for carbon which had adsorbed phenol in aqueous solutions, including an industrial wastewater, and the results indicated that the amount of solvent can be minimized by using countercurrent multistage operation.