Degradation of Tannic acid powered by TiO2 nano particles

Lakshmi Kruthika, N and Bhaskar Raju, G and Prabhakar, S (2012) Degradation of Tannic acid powered by TiO2 nano particles. In: Photocatalytic Materials & Surfaces for Environmental Clean-up. Material Science forum, 734 (734). Trans Tech Publications, Switzerland, pp. 117-126. ISBN 0255-5476

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The wastewater from the coir, pharmaceutical, leather, paper and pulp industries is contaminated with water-soluble poly phenolic compounds (tannins). Among various tannins, tannic acid is a typical hydrolysable tannin prevalent in wastewater. The degradation of tannic acid using TiO2 nanoparticles as photocatalyst was investigated. The effect of catalyst concentration, pH of aqueous suspension and also electron acceptors such as hydrogen peroxide (H2O2) and ozone (O3) on the degradation of tannic acid was studied. The degradation of tannic acid was found to be more efficient and complete in the presence of UV/TiO2/O3 compared to UV/TiO2/H2O2. The kinetics of degradation was observed to follow first order rate equation which indicates that the mineralization process is diffusion controlled.

Item Type:Book or NML Publication
Official URL/DOI:
Uncontrolled Keywords:Tannic acid, TiO2 nanoparticle, photo-catalyst, mineralization, advanced oxidation, ozone, hydrogen peroxide
Divisions:Analytical Chemistry
ID Code:6172
Deposited By:Dr. G Bhaskar Raju
Deposited On:23 Nov 2012 14:22
Last Modified:23 Nov 2012 14:22
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