title: Kinetic modeling of AS(III) and AS(V) adsorption by a novel tetravalent manganese feroxyhyte.
abstract: OBJECTIVE
  The purpose of the present work is the development of a kinetic model for the adsorption of As(III) and As(V) onto tetravalent manganese feroxyhyte (δ-Fe0.75Mn0.25OOH), which have been recently proved to be very efficient adsorbent for the particular species.
  
  
  METHODS
  In this respect equilibrium and adsorption kinetic experiments onto this type of adsorbent for As(III) and As(V) were performed. Two sizes of adsorbate particles are tested in order to acquire better insight to the adsorption process.
  
  
  RESULTS
  The adsorption kinetic curves cannot be described by the well-known adsorption kinetic models so a detailed model that takes into account the structure of the adsorbent particle is developed. The model parameters were extracted by the requirement of agreement between model and experimental results. The batch model developed here is necessary for the development of models for fixed bed adsorption devices in order to exploit the commercial prospects of the particular adsorbent. This work constitutes the first attempt of kinetic study and adsorption model development for the specific very promising adsorbent.
authors: Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece. Electronic address: tresintsi@yahoo.gr.
authors: S
authors: S
authors: Tresintsi
authors: Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece. Electronic address: manasis@eng.auth.gr.
authors: M
authors: M
authors: Mitrakas
authors: Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece. Electronic address: ksime@physics.auth.gr.
authors: K
authors: K
authors: Simeonidis
authors: Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece. Electronic address: kostoglu@chem.auth.gr.
authors: M
authors: M
authors: Kostoglou
keywords: Adsorption kinetics; Adsorption model development; Aggregate structure; Pore diffusion; Primary particles; Solid state diffusion