Sorption and desorption of dyes by sulfonated coal

Journal Article · · Journal of Environmental Engineering (New York); (United States)

DOI:https://doi.org/10.1061/(ASCE)0733-9372(1993)119:2(366)· OSTI ID:6590005

Mittal, A K ^[1]; Venkobachar, C ^[2]

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

Wastewaters from dye-manufacturing factories and textile, paper, and pulp industries are highly colored. Their discharge into river waters make the water inhibitory to aquatic life, aside from causing, visible pollution. Dyes have a tendency to sequester metals, thus causing microtoxicity to fish and other aquatic organisms. A wide variety of low-cost materials such as flyash, clay minerals, coal, tire chippings, coconut shell powder and biosorbents are being tried as viable substitutes for activated carbon to remove different pollutants such as pesticides, heavy metals, and dyes. The removal of dyes depends upon their physical and chemical characteristics, as well as the properties of the selected sorbents. To understand the nature of the chemical bonding between dyes and sorbents during the sorption process, it is essential to conduct desorption studies. The reversibility of adsorption of dyes can also be determined by a simple mathematical equation. These studies provide information on whether or not the sorbent material can be regenerated after exhaustion. The present study focuses on sorption-desorption of dyes by sulfonated coal, whose dye sorption potential was established by Mittal and Venkobachar (1990).

• OSTI ID: 6590005
• Journal Information: Journal of Environmental Engineering (New York); (United States), Journal Name: Journal of Environmental Engineering (New York); (United States) Vol. 119:2; ISSN 0733-9372; ISSN JOEEDU
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500 -- Coal
Lignite
& Peat-- Products & By-Products
54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
CARBONACEOUS MATERIALS
CHEMICAL BONDS
CLEANING
COAL
DECONTAMINATION
DESORPTION
DYES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
PROCESSING
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER