Open AccessMethylene Violet Dye Adsorption Using Onion Skins: Kinetics and Isotherm Studies
Author(s) -
Ghazi Faisal Naser,
Ihsan Habib Dakhil,
Ahmed Hassoon Ali,
Alaa Hussein Taha
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1090/1/012047
Subject(s) - adsorption , freundlich equation , chemistry , methylene blue , kinetics , diffusion , chromatography , langmuir , langmuir adsorption model , nuclear chemistry , organic chemistry , thermodynamics , catalysis , physics , photocatalysis , quantum mechanics
This study examined the use of Onion Skins, an inexpensive adsorbent material, for removing the Methyl Violet dye which represents the main objective by using batch adsorption process to investigate and understand the adsorption behaviour, the kinetics and the equilibrium isotherm using a low-cost adsorbent. The study included the influence of contact time and the dosage of adsorbent experiment. The Onion skins was dried, cleaned and crushed. Batch experiments were applied to study the contact time effect using dye with an initial fifty milligram per litter concentration, and different amounts (0.5, 1.0, 1.5, 2.0) gm of adsorbent were used to study the dosage effect. The batch experiment showed a good dye removal with 51.3% during the first 150 min and 54.03% using 1.0 gm of adsorbent. Three kinetics models were applied: Pseudofirst, pseudosecond order and adsorption model for intraparticle diffusion. Pseudosecond and intraparticle diffusion were highly fitted models with a correlation of 0.9998 and 0.9691 respectively. Isotherm study was applied using the Langmuir, Freundlich and BET model, Freundlich model was best fitted model with a correlation of 0.9945, which suggesting a multilayer adsorption.