%0 Journal Article
%T Solar photocatalitic degradation of Vat Yellow 4 dye in aqueous suspension of TiO2 - optimization of operational parameters
%A Sullipalayam K. Kavitha
%A Pachakoundanpalayam N. Palanisamy
%J Advances in Environmental Sciences
%D 2010
%I Bioflux Society
%X The photocatalytic decolourisation and degradation of an anthraquinone dye Vat Yellow 4 inaqueous solution with TiO2-P25 (Degussa) as photocatalyst in slurry form has been investigated undersolar irradiation and UV irradiation. The study on the effect of various photocatalysts on the degradationreveals that TiO2 is the best catalyst in comparison to other commercial photocatalysts. The effects ofvarious operational parameters such as catalyst loading, initial dye concentration and pH on thedecolourisation and degradation under solar irradiation in TiO2 suspension have been investigated to findout the optimum conditions. The decolourisation and degradation kinetics have been analysed. Bothfollow first-order kinetics. A study on the effect of electron acceptors on photo oxidation reveals thatboth decolourisation and degradation increase in the presence of the electron acceptors such as H2O2and (NH4)2S2O8 up to an optimum dosage beyond which the enhancement effect is negligible. Thecomparison between thin-film coating of TiO2 and aqueous slurry method reveals that slurry method ismore efficient.
%K photocatalytic degradation
%K Vat Yellow 4
%K TiO2
%U http://www.aes.bioflux.com.ro/docs/2010.2.189-202.pdf