Faculty Advisor

Bergendahl, John Andrew

Faculty Advisor

Hart, Frederick L.


The objective of this project was to study and evaluate the treatment efficiency of a reactor that utilized titanium dioxide (TiO2) nanoparticles immobilized on glass beads in both a fixed and fluidized bed configuration. The degradation of the organic contaminant, methylene blue (MB), was evaluated with a UV-vis spectrophotometer. Results suggested that the inter-particle forces acting between coated glass beads in a fluidized bed exceeded the bond strength of the nanopowder coating and thus detached. Conversely in a fixed bed, with a lower fluid flow rate, results showed a steady reduction in MB concentration over time when the immobilized TiO2 was exposed to UV irradiation. This degradation was found to perform at a rate much higher than the rate of UV exposure without TiO2 present.


Worcester Polytechnic Institute

Date Accepted

January 2014


Environmental Engineering

Project Type

Major Qualifying Project



Advisor Department

Civil and Environmental Engineering