Abstract
The use of ultraviolet (UV) light and chlorine dioxide (ClO2) as an advanced oxidation process (AOP) has been investigated at the bench-scale to understand the effects of their use on disinfection by-product (DBP) formation potential (FP) in chlorinated groundwater (GW) and surface water (SW) supplies. Two GWs and two SWs of varying qualities were subject to a series of AOP treatment sequences at the bench scale: sodium hypochlorite, to serve as a baseline; ClO2-Cl2, UV-Cl2, and UV-ClO2-Cl2. In these treatment sequences, Cl2 is used as a primary and secondary disinfectant. Several water quality parameters were measured throughout the experiments, including chlorite (ClO2-) and chlorate (ClO3-) when ClO2 was used for process testing. Total trihalomethane (TTHM) FP curves were developed for each experiment along with the 7-day haloacetic acid (HAA) FP. The treatment sequence UV-ClO2 followed by Cl2 addition for GW supplies was shown to remove between 8 and 35 percent of the TTHM FP as compared to little to no change in formation potential with UV treatment alone followed by Cl2 addition. The SW supplies resulted in reductions between 16 and 27 percent for the treatment sequence UV-ClO2 followed by Cl2, approximately double the reduction from ClO2 alone followed by Cl2. GW treatment using the UV-ClO2 AOP followed by Cl2 was found to increase HAA formation, in one case by almost 50 percent compared to the baseline HAA concentrations. The research indicated the reduction of DBP FP AOP effectiveness to reduce DBP formation was highly dependent on the specific source water type and quality.
Notes
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Graduation Date
2020
Semester
Summer
Advisor
Duranceau, Steven
Degree
Master of Science in Environmental Engineering (M.S.Env.E.)
College
College of Engineering and Computer Science
Department
Civil, Environmental, and Construction Engineering
Degree Program
Environmental Engineering
Format
application/pdf
Identifier
CFE0008576; DP0024252
URL
https://purls.library.ucf.edu/go/DP0024252
Language
English
Release Date
February 2021
Length of Campus-only Access
None
Access Status
Masters Thesis (Open Access)
STARS Citation
Campesino, Paula, "Ultraviolet Irradiation Combined with Chlorine Dioxide Pre-oxidation For Disinfection By-product Control" (2020). Electronic Theses and Dissertations, 2020-2023. 605.
https://stars.library.ucf.edu/etd2020/605