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Adsorption and photocatalytic removal of Ibuprofen by activated carbon impregnated with TiO2 by UV-Vis monitoring
Tijdschriftbijdrage - Tijdschriftartikel
The removal of Ibuprofen was investigated by activated carbon impregnated with TiO2. Emphasis was given on the effect of different parameters, such as composite type, initial Ibuprofen concentration (5 -25 mg/L), temperature (22-28 degrees C) and pH (acidic and alkaline solution). The experiment was carried out in a self-made tubular flow reactor, with one 15 W monochromatic UV lamp (254 nm). The composite AC90T10 gives the highest removal degree of 92% of Ibuprofen solution under UV light within 4 h, due to synergy of adsorption and photodegradation. It was found that weight ratio of composite/Ibuprofen has limited effect on the removal degree within the concentration range (5-25 mg/L), but reaction time under UV light (4 h) and pH (acidic solution) are very important. The kinetic experimental data obtained at pH 4.3 at 25 degrees C on different composites were fitted to pseudo-first, pseudo-second and Elovich models, obtaining a high accuracy based on R-2 values. From the results, composites of granular activated carbon and TiO2 can enhance removal of Ibuprofen effectively, making recycle process much easier and less costly, which can be a promising method in future water treatment. (C) 2018 Elsevier Ltd. All rights reserved.
Pagina's: 724 - 731
Trefwoorden:Activated carbon, TiO2, Ibuprofen, Photodegradation, Adsorption
Authors from:Government, Higher Education, Private