| Benzophenone-3 degradation via UV/H2O2 and UV/persulfate reactions | |
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| 년도 | 2021 |
| 날짜 | 2021 Feb 5 |
| 페이지 / 학회지명 |
403:123591 / Journal of Hazardous Materials |
| 논문저자 | Young-Min Lee 1, Gowoon Lee 1, Kyung-Duk Zoh 2 |
| Link |
https://www.sciencedirect.com/science/article/abs/pii/S030438942031577…
123회 연결
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1 Institute of Health and Environment, Seoul National University, Seoul, South Korea. 2 Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, South Korea. Electronic address: zohkd@snu.ac.kr. Abstract The degradation of benzophenone-3 (BP3) in water via the UV/H2O2 and UV/persulfate (UV/PS) reactions was investigated. The degradation of BP3 exhibited pseudo-first-order kinetics in both reactions. The degradation efficiency of BP3 was higher in the UV/PS reaction than in the UV/H2O2 reaction. In both reactions, the observed rate constants (kobs) of BP3 degradation were highest at pH 6 and increased linearly with increasing dosage of H2O2 and persulfate. The second-order rate constants of BP3 with •OH (k•OH_BP3) and •SO4- (k•SO4-_BP3) were determined to be 1.09 (± 0.05) × 1010 and 1.67 (± 0.04) × 109 M-1 s-1, respectively. The kobs values of BP3 were affected by water components such as HCO3-, NO3-, Cl-, and Br- ions, as well as humic acid. Based on the identified transformation products (TPs), the degradation pathway of BP3 during both reactions was a hydroxylation reaction. The inhibition of bioluminescence in Vibrio fischeri due to BP3 and its TPs decreased more quickly in the UV/PS reaction than in the UV/H2O2 reaction. The results suggest that the UV/PS process is a better alternative to the UV/H2O2 process for removing BP3 and its toxicity in water. Keywords: Oxybenzone; UV-AOP; byproducts; radicals; toxicity. |
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