4.6 Article

Defluoridation by rice spike-like akaganeite anchored graphene oxide

期刊

RSC ADVANCES
卷 6, 期 14, 页码 11240-11249

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ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra24565f

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  1. National Natural Science Foundation of China [21377039]
  2. Shanghai international cooperation research projects [14230710900]

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Due to intake of excessive fluoride in drinking water, endemic fluorosis, the most widely distributed endemic diseases has caused worldwide attention. In this study, akaganeite anchored graphene oxide (beta-FeOOH@GO) nanocomposites were synthesized by in situ forced hydrolysis of ferric chloride in presence of graphene oxide under facile condition. beta-FeOOH@GO was characterized and evaluated as a new potential carbon sorbent for defluoridation in environmental application. The application pH, adsorption capacity, adsorption kinetic and anti-interference ability in defluoridation with beta-FeOOH@GO was described. On the basis of Fourier transform infrared spectroscopy (FTIR) and X-ray Photoelectron Spectroscopy (XPS) analysis, defluoridation mechanism involving the ion-exchange with chloride anions bearing in beta-FeOOH@GO is indicated at molecular level from a new perspective way. It is a good supplement to classical hydroxyl replacement mechanism. It would be useful for the improvement of adsorption capacity and kinetics through designing facile anions-exchange adsorbents.

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