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Photocatalytic degradation of supra black-T dye on charcoal under sunlight

Author

Listed:
  • Reena Amatya Shrestha
  • Mika Sillanpää
  • Jarina Joshi
  • Ackmez Mudhoo

Abstract

Azo dyes are used in many industries such as carpet manufacturing, textiles, paint, ink, plastics and cosmetics production processes. The coloured industrial effluent can pose serious problems in the aquatic environment. It is possible to get complete mineralisation of organic pollutants in water by photocatalysts. This study was carried out to examine the feasibility to remove supra black-T dye from carpet dyeing wastewater by photocatalytic degradation on Oak charcoal under sunlight. Adsorption efficiency of dye on charcoal at various pH values and photodegradation with ZnO and TiO2 catalysts were studied. The removal efficiency of charcoal alone was 28 mg dye/g charcoal at pH 8 and 25°C in 60 min which was half that of activated charcoal. Photocatalytic degradation and adsorption with TiO2 and ZnO under sunlight was faster and almost complete removal was observed in shorter times.

Suggested Citation

  • Reena Amatya Shrestha & Mika Sillanpää & Jarina Joshi & Ackmez Mudhoo, 2012. "Photocatalytic degradation of supra black-T dye on charcoal under sunlight," International Journal of Environmental Technology and Management, Inderscience Enterprises Ltd, vol. 15(3/4/5/6), pages 208-219.
    • Handle: RePEc:ids:ijetma:v:15:y:2012:i:3/4/5/6:p:208-219
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