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has been cited by the following article:

• TITLE: Metakaolin-Based Geopolymers for Targeted Adsorbents to Heavy Metal Ion Separation

  AUTHORS: Francisco J. López, Satoshi Sugita, Motohiro Tagaya, Takaomi Kobayashi

  KEYWORDS: Geopolymer, Metakaolin, Silica Fume, Metal Ions, Adsorption

  JOURNAL NAME: Journal of Materials Science and Chemical Engineering, Vol.2 No.7, July 7, 2014

  ABSTRACT: Geopolymer adsorbents were prepared from silica and metakaolin in different Al and Si components and applied for removal of metal ions, Cs+ and Pb2+, from other heavy metal ions mixture. The geopolymer was optimized at Si/Al = 2 as adsorbent, targeting to Cs+ and Pb2+ separation. The binding behavior was well fitted to Langmuir model, which proved that the metakaolin-based geopolymer had multibinding to adsorb ions. The effective adsorption was also observed independent of NaCl concentration for the Cs+ and Pb2+. This meant that the ion adsorption of geopolymers occurred under non-electrostatic mechanism.