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JSIR Vol.63(06) [June 2004] >


Title: Photo-oxidative degradation of synthetic organic pollutant p-nitrophenol
Authors: Datta, Chitralekha
Naidu, Rashmi
Yenkie, M K N
Keywords: Photo-oxidation
Hydroxyl radicals
UV light
p-Nitrophenol
Issue Date: Jun-2004
Publisher: CSIR
Abstract: In the present study, photo-oxidation of a hazardous and refractory aromatic compound p-nitrophenol in its aqueous solution by strong oxidizing agent hydrogen peroxide in the presence of UV radiations emitted from UV source is investigated. The UV+H2O2 combination generates hydroxyl radicals having very high oxidation potential which helps in complete mineralisation of the organic pollutants. The photo-oxidative degradation of p-nitrophenol (PNP) is carried out using two different UV sources, namely an 8 W low pressure mercury vapour lamp and a 125 W medium pressure mercury vapour lamp to evaluate its effect on oxidative degradation. Complete degradation of the substrate and decolourisation are achieved in 5 and 2 h with 8 W and 125 W mercury vapour lamp, respectively. The initial substrate concentrate is kept at 1 x 10-4 mol/L. The photo-oxidation process is found to be strongly pH dependent.
Page(s): 518-521
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.63(06) [June 2004]

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