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- W2523373405 abstract "Abstract A new hybrid material, synthesized by combining shellac (Sh) and zirconium (Z) using environment friendly sol-gel method, was employed as an effective adsorbent for defluoridation of drinking water in the pH region 6.0–7.0. The presence of zirconium in the material surface was evidenced from the study of Scanning Electron Micrograph (SEM) associated with energy dispersive spectrum (EDS). The Fourier Transform Infrared (FTIR) spectrum of the material shows shifting of ν (O H) str towards lower wave number indicating adsorption of fluoride upon the material surface. The X-ray diffraction (XRD) pattern establishes the amorphous characteristics of material suitable for adsorption applications. The adsorption equilibrium was attained in 40 min time interval where almost 97% of fluoride could be removed from 10 mg dm −3 fluoride solution at pH 7.0 using 0.2 g dm 3 of material. However, very fast adsorption characteristics was noticed within first 5 min time interval where ∼60% of fluoride could be removed from the solution. The kinetics of adsorption process follows pseudo-second order as well as intra-particle diffusion mechanism with almost ≥0.99 accuracy. The thermodynamics of fluoride adsorption was found to be spontaneous and exothermic in nature. The new material shows good regeneration efficiency up to 6th cycles of continuous operation with very little effect of co-ions on the adsorption capacity. The ligand exchange mechanism for the removal of fluoride is presented in proposed scheme of reaction." @default.
- W2523373405 created "2016-09-30" @default.
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- W2523373405 date "2016-12-01" @default.
- W2523373405 modified "2023-09-26" @default.
- W2523373405 title "Development of new zirconium loaded shellac for defluoridation of drinking water: Investigations of kinetics, thermodynamics and mechanistic aspects" @default.
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- W2523373405 doi "https://doi.org/10.1016/j.jece.2016.09.018" @default.
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