Kinetic, thermodynamics and equilibrium studies on the removal of Congo red dye using activated teak leaf powder

Vidyadhar V Gedam,Pranay Raut,Anup Chahande,Pranav Pathak

doi:10.1007/s13201-019-0933-9

Vidyadhar V Gedam, Pranay Raut + Show 2 more

Open Access

https://doi.org/10.1007/s13201-019-0933-9

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Abstract

The present study investigates activated teak leaf powder (Tectona grandis) as a biosorbent for the effective removal of Congo red (CR) dye from aqueous solution. Biosorbent was characterized via Fourier transform infrared spectroscopy, scanning electron microscopy, Brunauer–Emmett–Teller and X-ray diffraction. The effect of different parameters, i.e., initial dye concentration, adsorbent dosage, contact time, pH and temperature, was studied in detail. The experimental data were interpreted and studied using Langmuir, Freundlich and Temkin isotherm, and Langmuir isotherm was observed to be best fit. The investigation shows the pseudo-second order is the prevailing kinetic mechanism during adsorption and the energy change (ΔG), enthalpy change (ΔH) and entropy change (ΔS) were − 5.101 kJ/mol, 246.792776 J/mol K and 69.6771398 kJ/mol, respectively. The results show that activated teak leaf powder can be a viable sorbent for the removal of CR dye from wastewater in a reasonable, economical and environmentally friendly way.

Highlights

Paper, textile, cosmetics, food, pharmaceutical and plastic industries discharge effluents containing highly colored dyes which are one of the major causes of environmental deterioration (Forgacs et al 2004)
The distinct nature and features of biosorbent were analyzed via Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) and X-ray diffraction (XRD)
The present investigation explores the effect of various physicochemical factors on adsorption efficiency along with kinetic, thermodynamics and equilibrium studies

Summary

Introduction

Textile, cosmetics, food, pharmaceutical and plastic industries discharge effluents containing highly colored dyes which are one of the major causes of environmental deterioration (Forgacs et al 2004). Low-cost biosorbent was explored in detail by many researchers in developing and developed countries due to its local abundance, low toxicity and inexpensive regeneration. Various materials such as orange peel (Namasivayam et al 1996), papaya seed (Hameed 2010; Nasuha et al 2011), jackfruit peel (Hameed 2009) and chitosan (Rouf et al 2015) were studied for effective dye removal. The present research work examines potential applicability of activated carbon prepared from TLP as a biosorbent for the effective removal of anionic CR dyes. The effect of different physicochemical parameters which include initial dye concentration, adsorbent dosage, pH, contact time and temperature along with adsorption isotherms, kinetics and thermodynamic parameters was explored in detail

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