Author： Bhandari Suruchi Vardia Jitendra Malkani R. K. Ameta Suresh C.
Publisher： Taylor & Francis Ltd
ISSN： 0277-2248
Source： Toxicological and Environmental Chemistry, Vol.88, Iss.1, 2006-01, pp. : 35-44
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Abstract
The photocatalytic bleaching of some dyes (erythrosin-B, fast green FCF and eosin Y) was carried in the presence of semiconducting zinc oxide and was observed spectrophotometrically. The effects of various operating variables like pH, concentration of dyes, amount of semiconductor and light intensity on the efficiency of the reaction were also observed. Attempts have been made to study the effect of the addition of other metal ions (Fe 2+ , Ni 2+ , Ag + , Cu 2+ , Co 2+ , V 2+ and Mn 2+ ). All the added metal ions increase the reaction rate to some extent. It was also observed that Fe 2+ is most effective in photobleaching of erythrosin-B, whereas V 2+ is more effective in the cases of fast green FCF and eosin Y. A tentative mechanism has been proposed.
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