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Simultaneous Adsorption of Remazol Brilliant Blue and Disperse Orange Dyes on Red Mud and Isotherms for the Mixed Dye System

Simultaneous Adsorption of Remazol Brilliant Blue and Disperse Orange Dyes on Red Mud and Isotherms for the Mixed Dye System

Ratnamala Gadigayya Mavinkattimath, Vidya Shetty Kodialbail, Srinikethan Govindan

Environ Sci Pollut Res Int. 2017 Aug;24(23):18912-18925.

PMID: 28656570

Abstract:

The paper presents the adsorption of Remazol brilliant blue (RBB) and Disperse orange 25 (DO25) dyes from aqueous solution of the mixture of dyes onto concentrated sulphuric acid-treated red mud (ATRM). First-order derivative spectrophotometric method was developed for the analysis of RBB and DO25 in mixed dye aqueous solution to overcome the limitations arising due to interference in the zero-order spectral method. The optimum conditions to maximize RBB adsorption favoured the adsorption of RBB, and those for DO25 favoured DO25 adsorption from the mixed dye aqueous solutions. Presence of a second dye always inhibited the adsorption of a target dye. The uptake and percentage adsorption of each of the dyes onto ATRM from the aqueous solution of the mixture of dyes decreased considerably with increasing concentrations of the other dye showing the antagonistic effect. Monocomponent Langmuir isotherm fitted the mixed dye adsorption equilibrium data better than the monocomponent Freundlich isotherm. However, monocomponent models are suitable for the fixed concentration of the other dye. Modified Langmuir isotherm model adequately predicted the multi-component adsorption equilibrium data for RBB-DO25-ATRM adsorption system with a good accuracy and is more generic from the application point of view.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP31482561	Disperse Orange 25		31482-56-1	Price

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