Publications (2)2.95 Total impact
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Article: Removal of azo dyes from aqueous solutions using activated carbon as an adsorbent.
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ABSTRACT: The potentiality of commercially available activated carbon has been investigated as an effective adsorbent to remove the dyes from aqueous solutions. The effects of pH of the solution, adsorbent dose, solute concentration and temperature on activated carbon for azo dyes such as acid orange 7 and direct red 31 have been evaluated. The percentage removal of the dyes has been found to be high at neutral pH. The dynamics of adsorption has been studied at different temperatures. The adsorption data follow Langmuir model as well as Freundlich model in the case of acid orange 7 whereas the data for direct red 31 fit into only Langmuir model.Journal of environmental science & engineering. 05/2004; 46(2):172-8. -
Article: Heterogeneous photocatalytic mineralisation of phenols in aqueous solutions
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ABSTRACT: The photocatalytic oxidation of phenol and chlorophenols were studied in the presence of ZnO in a batch reactor configuration illuminated with a 6 W low pressure mercury lamp. The variables studied include catalyst usage, solution pH and phenol concentration. The degradation rate of phenol was favourable in the neutral pH range. However, o-chlorophenol and p-chlorophenol undergo degradation at a faster rate at lower pH values. The disappearance of phenols in each case approximately obeyed first-order kinetics with the apparent first-order decay constant increasing with decreasing solute concentration. Total organic carbon analysis indicated complete mineralisation of phenols on ZnO surface.Graphical abstractJournal of Molecular Catalysis A Chemical 223:101-105. · 2.95 Impact Factor
