Adsorption isotherms and kinetics of activated carbons produced from coals of different ranks

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Title:	Adsorption isotherms and kinetics of activated carbons produced from coals of different ranks
Authors:	林進榮;Purevsuren, B.;Lin, Chin-Jung;Davaajav, Y.;Ariunaa, A.;Batbileg, S.;Avid, B.;Jargalmaa, S.;Huang, Yu;Liou, Sofia Ya-Hsuan
Contributors:	工學院環境工程研究所
Keywords:	Activated carbon;Adsorbents;Adsorption;Analytical methods;Aqueous solutions;Capacity;Carbon - chemistry;Coal;Coal - analysis;Coefficients;Correlation coefficient;Correlation coefficients;Diffusion;Diffusion coefficient;Diffusion models;Dye dispersion;Dyes;Electron microscopy;Equilibrium;Fourier transforms;Functional groups;Heterogeneity;Infrared analysis;Infrared spectroscopy;Kinetics;Lignite;Methylene blue;Methylene Blue - chemistry;Microscopy, Electron, Scanning;Particle diffusion;Photoelectron Spectroscopy;Photoelectrons;Pollutants;Pore size;Potassium;Scanning electron microscopy;Spectroscopy, Fourier Transform Infrared;Surface chemistry;Surface Properties;Thermal analysis;Titration;Water Pollutants, Chemical - chemistry;X ray photoelectron spectroscopy
Date:	2015-01-01
Issue Date:	2026-04-23 14:57:52 (UTC+8)
Publisher:	IWA Publishing;England: IWA Publishing
Abstract:	摘要： Activated carbons (ACs) from six coals, ranging from low-rank lignite brown coal to high-rank stone coal, were utilized as adsorbents to remove basic methylene blue (MB) from an aqueous solution. The surface properties of the obtained ACs were characterized via thermal analysis, N2 isothermal sorption, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and Boehm titration. As coal rank decreased, an increase in the heterogeneity of the pore structures and abundance of oxygen-containing functional groups increased MB coverage on its surface. The equilibrium data ﬁtted well with the Langmuir model, and adsorption capacity of MB ranged from 51.8 to 344.8 mg g−1. Good correlation coefficients were obtained using the intra-particle diffusion model, indicating that the adsorption of MB onto ACs is diffusion controlled. The values of the effective diffusion coefficient ranged from 0.61 × 10−10 to 7.1 × 10−10 m2 s−1, indicating that ACs from lower-rank coals have higher effective diffusivities. Among all the ACs obtained from selected coals, the AC from low-rank lignite brown coal was the most effective in removing MB from an aqueous solution. 其他題名： Water Sci Technol 出版者： England: IWA Publishing 出版日期： 2015-01-01 出處： Water science and technology, 2015-01, Vol.71 (8), p.1189-1195 版權： Copyright IWA Publishing Apr 2015 識別號： ISSN: 0273-1223 識別號： EISSN: 1996-9732 識別號： DOI: 10.2166/wst.2015.094 識別號： PMID: 25909729
Appears in Collections:	[Graduate Institute of Environmental Engineering ] journal & Dissertation

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