Pollution Research Paper

Vol 39, Issue 2, 2020; Page No.(355-366 )

BIOSORPTIVE SEPARATION OF METHYLENE BLUE DYE FROMAQUEOUS SOLUTION USING IMMOBILIZED CANNA INDICA: EQUILIBRIUM, KINETICS AND THERMODYNAMIC STUDY

S. VENKATESH AND V. ARUTCHELVAN

Abstract

In this study, immobilized Canna indica beads was synthesized by a simple and eco-friendly method and utilized as an effective adsorbent for the removal of methylene blue dye from aqueous solution. The newly synthesized immobilized Canna indica beads was characterized by FTIR and SEM analysis. In batch adsorption study, influencing parameters such as initial methylene blue dye concentration, solution pH, biosorbent dosage, temperature and contact time was investigated. The experimental results showed that present biosorbent material reached maximum adsorption at the contact time of 60 min, initial MB dye concentration of 25 mg/L, solution pH of 6.0, Biosorbent dosage of 3.5 g/L and the temperature of 30 oC. Adsorption equilibrium data followed by four different isotherm models such as Langmuir, Freundlich, Toth, Baudu model and the contact time data was fitted with Pseudo-first order, Pseudo-second order and Elovich kinetic model. The maximum monolayer adsorption capacity for the removal of MB dye using immobilized Canna indica beads was found to be 17.19 mg/g. The result of thermodynamic data showed that the adsorption was spontaneous and exothermic in nature. These outcomes exhibit that immobilized Canna indica beads are compelling, ecologically cordial and minimal effort biomaterial for dye removal from contaminated zone.

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