Simultaneous Adsorption of Cationic and Anionic Dyes by Chitosan/Cellulose Beads for Wastewaters Treatment

There are thousands of commercially available dyes which represent 7 × 10 5 tons produced annually worldwide. Discharges of these dyes from dyeing industry effluents have the potential to reach aquatic environments, affecting many life forms. Methylene Blue (MB) is the most common dye used in textil...

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Bibliographic Details
Published in:International Journal of Environmental Research 2018-03, Vol.12 (1), p.59-65
Main Authors: Vega-Negron, Angel L., Alamo-Nole, Luis, Perales-Perez, Oscar, Gonzalez-Mederos, Angela M., Jusino-Olivencia, Christine, Roman-Velazquez, Felix R.
Format: Article
Language:English
Subjects:
Adsorption
Aquatic environment
Azo dyes
Beads
Carcinogens
Cationic dyes
Cations
Cellulose
Chitosan
Dipoles
Dye concentrations
Dyeing
Dyes
Earth and Environmental Science
Electrostatic properties
Environment
Environmental Engineering/Biotechnology
Environmental Management
Functional groups
Geoecology/Natural Processes
High-performance liquid chromatography
Hydrogen bonding
Hydrogen bonds
Landscape/Regional and Urban Planning
Life assessment
Liquid chromatography
Methylene blue
Natural Hazards
Research Paper
Sorption
Wastewater disposal
Wastewater treatment
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Summary:There are thousands of commercially available dyes which represent 7 × 10 5 tons produced annually worldwide. Discharges of these dyes from dyeing industry effluents have the potential to reach aquatic environments, affecting many life forms. Methylene Blue (MB) is the most common dye used in textile industries. Congo Red (CR) is an azo-based dye that can be metabolized in benzidine, a human carcinogen agent. In this study, polymeric beads made of chitosan and cellulose were used to remove simultaneously a cationic dye (MB) and a anionic dye (CR). The sorption capacity of the beads was evaluated using different dye concentrations under individual (MB or CR) and simultaneous (MB and CR) conditions. Dyes’ concentration in solution was determined by HPLC–DAD. The results evidenced that both dyes can be adsorbed individually and simultaneously on the polymeric beads. The sorption process fitted the Langmuir’s isotherm. The q max values for CR and MB simultaneous adsorption were 1.6 and 0.68 µmol/g, respectively. The chitosan/cellulose beads exhibited a large adsorption capacity for CR on individual and simultaneous experiments. Adsorption mechanism involves electrostatic interactions, hydrogen bonds and dipole-dipole forces between the functional groups of the polymeric beads and the dyes.
ISSN:1735-6865
2008-2304
DOI:10.1007/s41742-018-0066-2