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dc.contributor.authorLiang, Robert
dc.contributor.authorVan Leuwen, Jocelyn C.
dc.contributor.authorBragg, Leslie M.
dc.contributor.authorArlos, Maricor
dc.contributor.authorLi Chun Fong, Lena C. M.
dc.contributor.authorSchneider, Olivia M.
dc.contributor.authorJaciw-Zurakowsky, Ivana
dc.contributor.authorFattahi, Azar
dc.contributor.authorRathod, Shasvat
dc.contributor.authorPeng, Peng
dc.contributor.authorServos, Mark R.
dc.contributor.authorZhou, Norman Y.
dc.date.accessioned2019-01-04 18:19:46 (GMT)
dc.date.available2019-01-04 18:19:46 (GMT)
dc.descriptionThe final publication is available at Elsevier via https://doi.org/10.1016/j.cej.2018.12.065. © 2018 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.description.abstractThe presence of pharmaceutical and personal care products (PPCPs) in aquatic systems has been a growing cause for concern. Advanced oxidation processes such as UV/TiO2 (ultraviolet light/titanium dioxide) can break down PPCPs into smaller constituents, reducing the pharmaceutical activity. However, this process is limited by low photonic efficiency under UV systems. Controlled periodic illumination (CPI) is a promising solution to overcome the issues concerning low photonic efficiencies. Using a CPI controlled UV-LED/TiO2 process, a mixture of eighteen PPCP compounds were analyzed for their degradation removal on porous titanium – titanium dioxide (PTT) substrates. The kinetic rate constants of PPCPs may be analyzed using multiple regression analysis with parameters such as net charge at experimental pH, solubility, and molecular weight. Negatively charged PPCP compounds were found to have the highest removal compared to neutral and positively charged compounds due to electrostatic attraction forces. Decreasing the duty cycle under CPI or the UV-LED illumination period did not significantly change the individual and cumulative PPCP compound removal, suggesting that the CPI controlled UV-LED/TiO2 processes using PTT substrates were effective in reducing energy requirements without sacrificing removal performance.en
dc.description.sponsorshipNatural Sciences and Engineering Research Council [STPGP430654-12]en
dc.description.sponsorshipSchwartz-Resiman Foundation
dc.description.sponsorshipWaterloo-Technion Research Co-operation Program
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.subjecttitanium dioxideen
dc.subjectemerging contaminantsen
dc.subjectcontrolled periodic illuminationen
dc.subjectadvanced oxidation processen
dc.subjectpharmaceutical and personal care productsen
dc.subjectParrondo’s paradoxen
dc.titleUtilizing UV-LED pulse width modulation on TiO2 advanced oxidation processes to enhance the decomposition efficiency of pharmaceutical micropollutantsen
dcterms.bibliographicCitationR. Liang, J.C. Van Leuwen, L.M. Bragg, M.J. Arlos, L.C.M. Li Chun Fong, O.M. Schneider, I. Jaciw- Zurakowsky, A. Fattahi, P. Peng, M.R. Servos, Y. Norman Zhou, Utilizing UV-LED pulse width modulation on TiO2 advanced oxidation processes to enhance the decomposition efficiency of pharmaceutical micropollutants, Chemical Engineering Journal (2018), doi: https://doi.org/10.1016/j.cej.2018.12.065en
uws.contributor.affiliation1Faculty of Engineeringen
uws.contributor.affiliation1Faculty of Scienceen
uws.contributor.affiliation2Mechanical and Mechatronics Engineeringen
uws.contributor.affiliation2Waterloo Institute for Nanotechnology (WIN)en

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