Removal of sulfamethoxazole, ibuprofen and nitrobenzene by UV and UV/chlorine processes: A comparative evaluation of 275 nm LED-UV and 254 nm LP-UV

Investigation of the efficacy of the UV/Chlorine process for the removal of trimethoprim: Effects of operational parameters and artificial neural networks modelling

“…Although OCl − at 275 nm does not have the highest molar absorption coefficient (as compared to 310 nm) nor does it have the highest quantum yield to decompose the most OClto form radical chlorine species upon UV irradiation (as compared to 254 nm), the UV(275)/Cl 2 systems provide a sweet spot for OClto have the best of both worlds. Results are in accordance with Wang et al's application of UV-LED in chlorine photolysis of carbamazepine and Kwon et al's usage of UV-275 LEDs to remove nitrobenzene and ibuprofen (Kwon et al, 2018;Wang et al, 2017).…”

Removal of Algae, and Taste and Odor Compounds by a Combination of Plant-Mineral Composite (PMC) Coagulant with UV-AOPs: Laboratory and Pilot Scale Studies

“…After adding 25 µL (1 g/L peroxidase stock solution) of peroxidase reagent, the chlorine concentration measured in mg/L. For the H2O2, the chlorine result was divided by two [19][20][21]. Figure 2 shows the removal efficiency of algae and turbidity as a function of varied PMC-based coagulant dose from 0 to 70 mg/L at 22 to 25 °C.…”

State of the Art of UV/Chlorine Advanced Oxidation Processes: Their Mechanism, Byproducts Formation, Process Variation, and Applications

“…Kwon et al compared a 275 nm UV-LED/chlorine process with a LP-UV/chlorine process and indicated that the 275 nm UV-LED/chlorine system had higher radical yields at pH 7 and 8 than the LP-UV/chlorine system due to the higher ε of ClO − at 275 nm than that of HOCl (Fig. 2) [109]. Wang et al discussed the use of UV-LEDs with emission wavelength of 285 and 310 nm for UV/chlorine AOPs [110].…”