Uptake of cationic dyes by sulfonated coal: Sorption mechanism

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie940436l· OSTI ID:238055

Mittal, A K ^[1]; Venkobachar, C ^[2]

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1. Motilal Nehru Regional Engineering Coll., Allahabad (India). Dept. of Civil Engineering
2. Indian Inst. of Tech., Kanpur (India). Dept. of Civil Engineering

Mechanistic aspects of sorption of Rhodamine B and Methylene Blue by sulfonated coal have been investigated. The coal surface before and after sulfonation has been characterized with the help of cation-exchange capacity measurements and infrared (IR) spectroscopy. These studies indicate that sulfuric acid treatment not only incorporates a SO{sub 3}H group on the coal surface but also oxidizes both aliphatic and aromatic fractions. The IR spectroscopy has been extensively applied to locate the active sites on the surface of the sorbent and the participating functional groups of the dye molecule. Graphical models of the sorbate-sorbent interaction have been proposed. These models are applied to explain the variation in the uptake potential of these dyes by sulfonated coal.

• OSTI ID: 238055
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 4 Vol. 35; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADSORPTION
COAL
METHYLENE BLUE
MOLECULAR MODELS
RHODAMINES
SORPTIVE PROPERTIES
SULFONATES