Adsorption of Crystal Violet Dye onto Tamarind Seed Powder

Himanshu Patel,R T Vashi

doi:10.1155/2010/143439

Abstract

The present investigation describes adsorption of crystal violet dye from its aqueous solution onto tamarind (Tamarindus indica) fruit shell powder. Initial concentration, agitation speed and pH with various temperature have been studied, in which pH was found to be most effective. The adsorption data were mathematically analyzed using adsorption isotherm like Freundlich and Langmuir isotherm to study adsorption mechanism of crystal violet onto this seed powder. Freundlich isotherm was found to be most applicable. The equilibrium data were applied to intra-particle diffusion and adsorption kinetics. The reaction was found to be pseudo second order.

Highlights

Textile industry uses large volumes of water in wet processing operations and thereby, generates substantial quantities of wastewater containing large amounts of dissolved dyestuffs and other products, such as dispersing agents, dye bath carriers, salts, emulsifiers, leveling agents and heavy metals[1]
It was observed that sorption of tamarind seed powder (TSP) for crystal violet (CV) increased with increasing temperature indicating that the sorption process was endothermic in nature
The increase in uptake of dye molecules with temperature may be due to the desolvation of the sorbing species and change in the size of the pores and further evidence that intraparticle diffusion plays an important role in the rate-determining step in the adsorption of CV on TSP is confirmed by the temperature dependence of the rate of adsorption[2]

Summary

Introduction

Textile industry uses large volumes of water in wet processing operations and thereby, generates substantial quantities of wastewater containing large amounts of dissolved dyestuffs and other products, such as dispersing agents, dye bath carriers, salts, emulsifiers, leveling agents and heavy metals[1]. Adsorption isotherm (Freundlich and Langmuir) and adsorption kinetics (Pseudo first-, second-order and intra particle diffusion) were analyze in this explored.

Results

Conclusion