Camesano, Terri Anne
Thompson, Robert W.
LʼEcole Nationale Supérieure des Industries C
Azo dyes present in wastewater require removal due to negative environmental and health effects. This study focused on photocatalytic degradation of these dyes on a titanium dioxide substrate. Solutions of each dye in water were run through a photocatalytic reactor and analyzed using UV spectroscopy, non-purgeable organic carbon method, Nessler method, ion chromatography, and lettuce test. The degradation rate increased with the presence of sulfate groups and decreased with molecules containing additional azo groups and aromatic rings. As the degradation rate increased, the concentration of ammonia in the final solution typically decreased. All solutions had a reduced total organic content. The majority of dye solutions increased in toxicity after exposure to the reactor.
Worcester Polytechnic Institute
Major Qualifying Project
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