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- W4313352174 endingPage "2031" @default.
- W4313352174 startingPage "2014" @default.
- W4313352174 abstract "In this research, photocatalytic hydrogels of polyacrylic acid/guar gum/Titanium dioxide (PAA/GG/TiO2) were synthesized and optimized by response surface methodology for the absorption and degradation of methylene blue (MB). The variables were the amount of cross-linking agent, the amount of guar gum, the amount of TiO2 nanoparticles, and the pH of the environment, respectively. The optimizing responses were swelling ratio and absorption in two environments with and without UV radiation, respectively. The optimal samples contained 4% (molar) cross-linking agent and 2 wt. % of guar gum. The amount of TiO2 was optimized at 5 and 7 wt. %. To achieve dye absorption rate, kinetic models such as pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion (Weber–Morris), had been investigated in visible light and UV radiation at an initial concentration of MB 20 (ppm) for one day. Also, absorption isotherm equations in visible light and UV irradiation at various concentration of 20–60 ppm were evaluated based on the models of Freundlich, Langmuir (Hanes–Woolf), Temkin, and Dubinin–Radushkevic. The results showed that the hydrogel containing 4% (molar) of crosslinker, 5 wt. % of TiO2, and 2 wt. % guar gum, have good efficiency for removing MB from the aqueous medium and this property is intensified by UV radiation." @default.
- W4313352174 created "2023-01-06" @default.
- W4313352174 creator A5025871110 @default.
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- W4313352174 date "2022-12-17" @default.
- W4313352174 modified "2023-10-15" @default.
- W4313352174 title "Preparation and Optimization of Photocatalytic Polyacrylic Acid/Guar Gum/TiO2 Hydrogels for Absorption and Removing of Methylene Blue Under Visible and UV Irradiation" @default.
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- W4313352174 doi "https://doi.org/10.1007/s10924-022-02738-1" @default.
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