UV-A Activated ZnO Mediated Photocatalytic Decolorization of Nigrosine (Acid Black 2) Dye in Aqueous Solution
Open Access
- 1 January 2017
- journal article
- Published by Scientific Research Publishing, Inc. in Journal of Geoscience and Environment Protection
- Vol. 05 (09), 138-147
- https://doi.org/10.4236/gep.2017.59010
Abstract
The present study deals with studied the essential requirements for photo-decoulorization of nigrosine dye with suspension solution of photocatalyst (ZnO), under 250 Watt UV-A light (Io = 1.47 10-7 ensien s-1). A kinetics study of photo-decolourization for this dye was obeyed to pseudo-first order. The best initial pH of decolorization at 25 mg/L of dye solution with 300 mg of ZnO was given a fast reaction at 8.17. The calculated activation energy for this photoreaction was found to be 31.549 kJ·mol-1. Thermodynamically, the reaction is exothermic and spontaneously. The efficiency of decolorizatio E% was 97.077 at 15 min that decreased with addition oxidant reagents such as H2O2, Fe2+ and mixture from them.Keywords
This publication has 1 reference indexed in Scilit:
- Fundamentals of ISCO Using Hydrogen PeroxidePublished by Springer Science and Business Media LLC ,2010