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Adsorption of methylene blue dye onto acid-treated tej residue: Kinetic, equilibrium and thermodynamic study

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Title Adsorption of methylene blue dye onto acid-treated tej residue: Kinetic, equilibrium and thermodynamic study
 
Creator Mekonnen, Bantie Yasabu
Abate, Gietu Yirga
Mekonnen, Shiferaw Dessie
Gebeyehu, Amsalu Genanew
 
Subject Dye removal
Isotherm
Kinetic model
Methylene blue
 
Description 94-102
Dye-containing wastewater is a very toxic and a major threat to the deterioration of water quality and makes it unsuitable
for domestic purposes. This drives low cost and eco-friendly adsorbents from environmental waste have been investigated to
treat dye-containing wastewater. In the present study, tej residues (TR) have been successfully employed as a natural and
non-conventional low-cost adsorbent for the removal of methylene blue (MB) dye from an aqueous solution. Optimization
of maximum operating condition has been carried out by batch mode experiment and the result shows maximum removal
efficiency of 82.1821 % at pH 8.0, adsorbent dosage 0.4g, initial dye concentration 20 ppm, contact time 60 min, and
temperature 25°C on the acid-treated surface of tej residue. Adsorption kinetics of the adsorbent has been evaluated by
pseudo-first-order, pseudo-second-order and intra-particle diffusion, and it is observed that the pseudo-first-order kinetic
model is better fitted with a good correlation coefficient, and the equilibrium data fitted well with the Freundlich isotherm
model. The Langmuir isotherm model estimates that the maximum adsorption capacity of the monolayer is found to be
215.053 mg/g. Thermodynamics parameters such as ΔG0, ΔH0 and ΔS0 indicate that the sorption process is feasible and
exothermic.
 
Date 2023-01-27T06:47:03Z
2023-01-27T06:47:03Z
2023-01
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/61294
https://doi.org/10.56042/ijct.v30i1.62337
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJCT Vol.30(1) [January 2023]