A STUDY OF THE ADSORPTION OF DYES FROM THEIR AQUEOUS SOLUTIONS BY MORUPULE COAL 1

Authors

  • Misael Silas Nadiye-Tabbiruka Chemistry Department, University of Botswana
  • Foertunate Phenyo Sejie Department of Chemistry, University of Botswana
  • Estella Judith Salamula Department of Chemistry,

DOI:

https://doi.org/10.24297/jac.v11i9.2687

Keywords:

Adsorption, Methyl orange, Morupule coal, kinetics, equilibrium,

Abstract

The adsorption of methyl orange (MO) from its solution by steam activated coal from Morupule colliery was investigated spectrophotometrically using the batch technique, through kinetics and thermodynamics’ study, and found to be reversible at all temperatures used. This was to check whether the coal could be used to purify dye-polluted water from dying and printing textile industry. The effects of varying methyl orange concentration, solution pH and temperature were investigated. The adsorption rate and the adsorption capacity increased with increasing initial concentration, with decreasing solution pH and with increasing temperature. The adsorption capacity was generally low probably due to the low coal surface area (10 m2g-1). The increase in rate and capacity with increasing temperature is believed to be increased surface area due to the swelling of coal which accompanies its heating.  The adsorption kinetics fitted the Lagergren pseudo second order model best indicating overall third order or dual simultaneous pseudo first order processes. Results from the thermodynamic study fitted  Freundlich model best indicating heterogeneity of the surface of the coal sample. 

Downloads

Download data is not yet available.

Author Biographies

Misael Silas Nadiye-Tabbiruka, Chemistry Department, University of Botswana

Chemistry Department, Senior Lecturer of Physical Chemistry.

Foertunate Phenyo Sejie, Department of Chemistry, University of Botswana

Postgraduate student

Downloads

Published

2015-07-29

How to Cite

Nadiye-Tabbiruka, M. S., Sejie, F. P., & Salamula, E. J. (2015). A STUDY OF THE ADSORPTION OF DYES FROM THEIR AQUEOUS SOLUTIONS BY MORUPULE COAL 1. JOURNAL OF ADVANCES IN CHEMISTRY, 11(9), 3959–3972. https://doi.org/10.24297/jac.v11i9.2687

Issue

Section

Articles