Faculty Advisor

Camesano, Terri Anne

Faculty Advisor

Thompson, Robert W.

Center

FR / France

Abstract

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.

Publisher

Worcester Polytechnic Institute

Date Accepted

February 2012

Major

Chemical Engineering

Project Type

Major Qualifying Project

Accessibility

Unrestricted

Advisor Department

Chemical Engineering

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