Decolourisation of Methylene Blue in Aqueous Solution using Locally Sourced Photocatalysts via UV Irradiation Photocatalytic Degradation

Authors

  • F. Aibuedefe Aisien University of Benin
  • A. Nosakhare Amenaghawon University of Benin
  • U Otuorimuo University of Benin

DOI:

https://doi.org/10.48317/IMIST.PRSM/morjchem-v2i4.2095

Keywords:

Periwinkle shell ash, Snail shell ash, Photocatalysis, Kinetics, Adsorption Equilibrium

Abstract

Locally sourced periwinkle shell ash (PSA) and snail shell ash (SSA) were investigated as potential photocatalysts for the photocatalytic decolourisation of methylene blue in aqueous solution. Preliminary studies showed that PSA performed better than SSA hence it was adopted for further investigations. The effects of process variables such as irradiation time, initial dye concentration and catalyst dosage on the decolourisation process were evaluated. The optimum values of the process variables were: irradiation time, 50 minutes; initial dye concentration, 7 mg/L and PSA dosage, 2 g/L. The adsorption equilibrium was well described by the Langmuir isotherm equation (R2=0.999) indicating mono layer type adsorption while the kinetics of the process were well described by the pseudo first order and Langmuir-Hinshelwood kinetic models with high R2 values (>0.90).

Author Biographies

F. Aibuedefe Aisien, University of Benin

Chemical Engineering Department

Professor

A. Nosakhare Amenaghawon, University of Benin

Chemical Engineering Department

Lecturer II

U Otuorimuo, University of Benin

Chemical Engineering Department

 

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Published

30-09-2014

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Section

Articles