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- W1963545266 abstract "The exposure to fluoride via drinking water is a great issue globally. This study investigates the adsorptive capability of the freshly prepared aluminum hydroxide, i.e., in-situ Al2O3·xH2O, towards fluoride. The maximum adsorption of above 110 mg F/g Al is observed in pH ranges from 5.0 to 7.2. The adsorption equilibrium is achieved within 120 min, and pseudo-second-order model may well describe the adsorption kinetics (R2 = 0.999), indicating the involvement of chemisorptions in. The characteristics of low particle diameter, high surface area, and the surface reactivity of the amorphous in-situ Al2O3·xH2O enables its superior to remove fluoride for the in-situ Al2O3·xH2O. pH impacts the distribution of Al species and the quantity of solid-state Al available for fluoride. The ratios of monomeric Al, i.e., Ala, are below 4% in pH from 6 to 8, and then increase to 19.2% at pH 4 and to 28.9% at pH 10. Alc, showing adverse trends to Ala, is the main species for fluoride removal. In cases that the amount of in-situ Al2O3·xH2O available is the same, surface charge is dominant to affect the removal of fluoride. FTIR indicates the replacement of surface hydroxyl groups by fluoride." @default.
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- W1963545266 date "2011-11-01" @default.
- W1963545266 modified "2023-09-26" @default.
- W1963545266 title "Defluoridation by freshly prepared aluminum hydroxides" @default.
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- W1963545266 doi "https://doi.org/10.1016/j.cej.2011.09.083" @default.
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