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- W2624113282 abstract "Microcystin-LR (MC-LR) is one of most abundant microcystins, and is derived from blue-green algae bloom. Advanced oxidation processes (AOPs) are effective process when high concentrations of MC-LR are released into a drinking water treatment system from surface water. In particular, UV-based AOPs such as UV, UV/H2O2, UV/O3 and UV/Tio2 have been studied for the removal of MC-LR. In this study, UV-LED was applied for the degradation of MC-LR because UV lamps have demonstrated some weaknesses, such as frequent replacements; that generate mercury waste and high heat loss. Degradation efficiencies of the MC-LR (initial conc. = 100 μg/L) were 30% and 95.9% using LED-L (280 nm, 0.024 mW/cm2) and LED-H (280 nm, 2.18 mW/cm2), respectively. Aromatic compounds of natural organic matter changed to aliphatic compounds under the LED-H irradiation by LC-OCD analysis. For application to raw water, the Nak-dong River was sampled during summer when blue-green algae were heavy bloom in 2016. The concentration of extracellular and total MC-LR, geosmin and 2-MIB slightly decreased by increasing the LED-L irradiation; however, the removal of MC-LR by UV-LED (λ= 280 nm) was insufficient. Thus, advanced UV-LED technology or the addition of oxidants with UV-LED is required to obtain better degradation efficiency of MC-LR. Key words: Blue-green Algae, Microcystin-LR, UV-LED, Advanced Oxidation Process, Taste and Odor Compounds, Natural Organic Matter" @default.
- W2624113282 created "2017-06-15" @default.
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- W2624113282 date "2017-05-31" @default.
- W2624113282 modified "2023-09-29" @default.
- W2624113282 title "Degradation of Microcystin-LR, Taste and Odor, and Natural Organic Matter by UV-LED Based Advanced Oxidation Processes in Synthetic and Natural Water Source" @default.
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- W2624113282 doi "https://doi.org/10.4491/ksee.2017.39.5.246" @default.
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