Adsorption Kinetics of Blue 5G Dye from Aqueous Solution on Dead Floating Aquatic Macrophyte: Effect of pH, Temperature, and Pretreatment

The textile industry is known to generate large quantities of effluents contaminated with dyes that are not fixed to the fibers during the dyeing process. The available technologies to remove these dyes from the wastewater are expensive and ineffective. Within this context, low-cost, easy-maintenanc...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2012-09, Vol.223 (7), p.4369-4381
Main Authors: Fagundes-Klen, Márcia Regina, Cervelin, Patricia Caroline, Veit, Márcia Teresinha, da Cunha Gonçalves, Gilberto, Bergamasco, Rosangela, da Silva, Flávia Vieira
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Aquatic plants
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Biomass
Chemical properties
Chemical treatment
Climate Change/Climate Change Impacts
Color removal
Dyes
Earth and Environmental Science
Effluents
Environment
Environmental monitoring
Equilibrium
Experimental data
Fibers
Hydrogen-ion concentration
Hydrogeology
Kinetics
Macrophytes
pH effects
Salvinia
Sodium hydroxide
Soil Science & Conservation
Spectrum analysis
Studies
Technology application
Textile industry
Wastewater
Water Quality/Water Pollution
Water treatment
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Summary:The textile industry is known to generate large quantities of effluents contaminated with dyes that are not fixed to the fibers during the dyeing process. The available technologies to remove these dyes from the wastewater are expensive and ineffective. Within this context, low-cost, easy-maintenance technologies for the removal of dyes have been studied, such as adsorption on aquatic macrophytes. Thus, the macrophyte Salvinia sp., raw or pretreated with NaOH or H 3 PO 4 , was used as biosorbent of Blue 5G reactive dye. The study showed that pH and temperature affect the dye removal capacity. The analysis of the infrared spectrum (FTIR) showed that chemical treatment of the Salvinia sp. modified the biomass surface and affected dye adsorption capacity. The pseudo-second-order kinetic model satisfactorily described the experimental data for raw and NaOH-pretreated biomass, and the pseudo-first-order model was more appropriate to describe the experimental data obtained with H 3 PO 4 -pretreated biomass. The highest capacity of Blue 5G dye removal was obtained with raw biomass, at 333 K and pH 1.0, with 98.35 % adsorption.
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-012-1201-x