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Title: High-performance magnetic carbon materials in dye removal from aqueous solutions

Abstract

To obtain a novel adsorbent with excellent adsorption capacity and convenient magnetic separation property, magnetic activated semi-coke was prepared by KOH activation method and further modified by FeCl{sub 3}. The surface morphology, physical structure, chemical properties and textural characteristics of unmodified semi-coke, KOH-modified semi-coke and magnetic activated semi-coke were characterized by scanning electron microscopy, X-ray powder diffraction, N{sub 2} adsorption-desorption measurement, and electronic differential system. The adsorption characteristics of the magnetic activated semi-coke were explored for the removal of methyl orang (MO), methylene blue (MB), congo red (CR), acid fuchsin (AF), and rhodamine B (RB) from aqueous solution. The effects of adsorption parameters, including adsorbent dosage, pH and contact time, were investigated by comparing the adsorption properties of the magnetic activated semi-coke to RB. The result showed that the magnetic activated semi-coke displayed excellent dispersion, convenient separation and high adsorption capacity. The adsorption experiment data indicated that the pseudosecond order model and the Langmuir model could well explain the adsorption processes of RB on the magnetic activated semi-coke, and the maximum adsorption capacity (q{sub m}) was 526.32 mg/g. The values of thermodynamic parameters (ΔG°, ΔH° and ΔS°) indicated that the adsorption process depended on the temperature of the aqueous phase,more » and it was spontaneous and exothermic in nature. As the addition of the magnetic activated semi-coke, the color of the solution significantly faded. Subsequently, fast aggregation of the magnetic activated semi-coke from their homogeneous dispersion in the presence of an external magnetic field could be happened. So, the magnetic activated semi-coke displayed excellent dispersion, convenient separation and high adsorption capacity. - Graphical abstract: As the addition of the magnetic activated semi-coke, the color of the solution significantly faded. Subsequently, fast aggregation of the magnetic activated semi-coke from their homogeneous dispersion in the presence of an external magnetic field could be happened. So, the magnetic activated semi-coke displayed excellent dispersion, convenient separation and high adsorption capacity. Display Omitted.« less

Authors:
; ; ;
Publication Date:
OSTI Identifier:
22584169
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 239; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ADSORBENTS; ADSORPTION; AGGLOMERATION; AQUEOUS SOLUTIONS; AZO DYES; CARBON; CHEMICAL PROPERTIES; COMPARATIVE EVALUATIONS; DESORPTION; ELECTRON SCANNING; IRON CHLORIDES; MAGNETIC FIELDS; METHYLENE BLUE; POTASSIUM HYDROXIDES; REMOVAL; RHODAMINES; SCANNING ELECTRON MICROSCOPY; SULFONIC ACIDS; X RADIATION; X-RAY DIFFRACTION

Citation Formats

Gao, Xiaoming, E-mail: dawn1026@163.com, Zhang, Yu, Dai, Yuan, and Fu, Feng, E-mail: yadxfufeng@126.com. High-performance magnetic carbon materials in dye removal from aqueous solutions. United States: N. p., 2016. Web. doi:10.1016/J.JSSC.2016.05.001.
Gao, Xiaoming, E-mail: dawn1026@163.com, Zhang, Yu, Dai, Yuan, & Fu, Feng, E-mail: yadxfufeng@126.com. High-performance magnetic carbon materials in dye removal from aqueous solutions. United States. doi:10.1016/J.JSSC.2016.05.001.
Gao, Xiaoming, E-mail: dawn1026@163.com, Zhang, Yu, Dai, Yuan, and Fu, Feng, E-mail: yadxfufeng@126.com. Fri . "High-performance magnetic carbon materials in dye removal from aqueous solutions". United States. doi:10.1016/J.JSSC.2016.05.001.
@article{osti_22584169,
title = {High-performance magnetic carbon materials in dye removal from aqueous solutions},
author = {Gao, Xiaoming, E-mail: dawn1026@163.com and Zhang, Yu and Dai, Yuan and Fu, Feng, E-mail: yadxfufeng@126.com},
abstractNote = {To obtain a novel adsorbent with excellent adsorption capacity and convenient magnetic separation property, magnetic activated semi-coke was prepared by KOH activation method and further modified by FeCl{sub 3}. The surface morphology, physical structure, chemical properties and textural characteristics of unmodified semi-coke, KOH-modified semi-coke and magnetic activated semi-coke were characterized by scanning electron microscopy, X-ray powder diffraction, N{sub 2} adsorption-desorption measurement, and electronic differential system. The adsorption characteristics of the magnetic activated semi-coke were explored for the removal of methyl orang (MO), methylene blue (MB), congo red (CR), acid fuchsin (AF), and rhodamine B (RB) from aqueous solution. The effects of adsorption parameters, including adsorbent dosage, pH and contact time, were investigated by comparing the adsorption properties of the magnetic activated semi-coke to RB. The result showed that the magnetic activated semi-coke displayed excellent dispersion, convenient separation and high adsorption capacity. The adsorption experiment data indicated that the pseudosecond order model and the Langmuir model could well explain the adsorption processes of RB on the magnetic activated semi-coke, and the maximum adsorption capacity (q{sub m}) was 526.32 mg/g. The values of thermodynamic parameters (ΔG°, ΔH° and ΔS°) indicated that the adsorption process depended on the temperature of the aqueous phase, and it was spontaneous and exothermic in nature. As the addition of the magnetic activated semi-coke, the color of the solution significantly faded. Subsequently, fast aggregation of the magnetic activated semi-coke from their homogeneous dispersion in the presence of an external magnetic field could be happened. So, the magnetic activated semi-coke displayed excellent dispersion, convenient separation and high adsorption capacity. - Graphical abstract: As the addition of the magnetic activated semi-coke, the color of the solution significantly faded. Subsequently, fast aggregation of the magnetic activated semi-coke from their homogeneous dispersion in the presence of an external magnetic field could be happened. So, the magnetic activated semi-coke displayed excellent dispersion, convenient separation and high adsorption capacity. Display Omitted.},
doi = {10.1016/J.JSSC.2016.05.001},
journal = {Journal of Solid State Chemistry},
number = ,
volume = 239,
place = {United States},
year = {Fri Jul 15 00:00:00 EDT 2016},
month = {Fri Jul 15 00:00:00 EDT 2016}
}