Photolytic degradation of dissolved compounds of 16 EPA-Listed PAHs in aqueous medium, exposed to ultraviolet/ titanium dioxide (UV-C/TiO2), xenon light/ titanium dioxide (Xe/TiO2), xenon light/ hydrogen peroxide (Xe/H2O2) and ultraviolet/ hydrogen peroxide (UV-C/H2O2) was studied. The compounds which detected above detection limit of applied analytical method and instrument include: naphthalene (Nap), acenaphthylene (Acy), acenaphthene (Ace), fluorene (Flu), fluoranthene (Fln) and pyrene (Pyr) survived. A time-course experiment (0, 1, 2, 5, 12 min) was performed to determine the fate of PAHs profile along treatments. After accomplishment of the removal process ∑6 PAHs ranked as follow: UV-C/TiO2 > Xe/TiO2 > UV-C > Xe > Xe/H2O2, and UV-C /H2O2 with estimated values of 76.38, 23.02, 22.55, 2.78, 0.00 and 0.00% of the concentration values at the beginning of the treatment, respectively. High efficiency of Xe/H2O2 treatment process (100.00%) at the end of treatment and the structure of residual PAHs which changed to the lighter compounds (2,3-ringed PAHs) before accomplishment of the removal process were proven. Generally, low resistance of Fln to all treatment conditions was observed. Total removal of Nap was considered to be a characteristic PAH compound for completion of the removal of PAHs. Mutate of parent PAH compounds and intermediates were analyzed by gas chromatography-mass spectrometry (GC-MS) and the results suggest the evaluating the toxicity of the treated water due to by-product formation concerns.
Water treatment advanced oxidation processes (AOPs) photodegradation endocrine disrupting chemicals (EDCs) 16 EPA-Listed PAHs
Ege University
2017/SÜF/014
This study was partially funded by Ege University Scientific Research (BAP) (Project No.: 2017/SÜF/014). Authors acknowledge Dr. Ozan Ünsalan (Ege University, Department of Physics) for his help with the analysis of Raman spectra. Navid Kargar and Golnar Matin thank Prof. Yury Gogotsi (A.J. Drexel Nanotechnology Institute, Drexel University) for his useful comments and suggestions on characterization of TiO2 nanocrystals.
2017/SÜF/014
Birincil Dil | İngilizce |
---|---|
Konular | Çevre Bilimleri |
Bölüm | Makaleler |
Yazarlar | |
Proje Numarası | 2017/SÜF/014 |
Yayımlanma Tarihi | 15 Mart 2020 |
Gönderilme Tarihi | 9 Nisan 2019 |
Yayımlandığı Sayı | Yıl 2020Cilt: 37 Sayı: 1 |