Synthesis and Characterization of Algeria Organo clays used for Elimination of Phosphate Anions from Aqueous Solution

S. Bandou, M. Amrani, O. Bouras

Abstract


Abstract:. This study is based on synthesis and characterization of  three different clays (Sodic-bentonite noted  , Dialyl Dimethyl Ammonium Chloride-bentonite noted  and bentonite intercalated by Hexadecyl Trimethyl Ammonium Bromide or  .These three clay complexes were characterized by both  diffraction   and Fluorescence Scanning Electron Microscopy , Fourier transform infrared spectroscopy ,textural measurements (  specific surface areas and porosities) and the cationic exchange capacity .

Corresponding obtained results confirm the good intercalation of the  by the two used surfactants at low concentrations (  for  and for ).

Obtained results give basal spacing values around   and   , respectively for verified two aims firstly: The originality of this research, secondly for minimized the production cost of the adsorbents.

Adsorption kinetic study of phosphate ions   on these three matrices was carried out using kinetic models of pseudo-first, pseudo-second-order and intraparticular diffusion. Results obtained at the studied conditions (room temperature  ), ( acidic medium ) show clearly the good validity of the pseudo-second-order model which gives a better correlation coefficient both, for    and    compared to that obtained by   The aim of this present study was to evaluate the feasibility of using chicken eggshells as low-cost biosorbentfor nickel(II) ions adsorption from aqueous solutions. In order to clarify the adsorption process, batch experiments were performed to study the effect of operating parameters such asbiosorbent dose (1-10 g/L), initial concentration of nickel ions (10-50 mg/L), contact time (5-120 min) and temperature (20-50 °C). To describe the adsorption equilibrium, the experimental data were analyzed by the Langmuir, Freundlich and Temkin isotherm models. The Freundlich model showed better representation of data (R2> 0.999).The maximum adsorption capacity Adsorption isotherms give adsorbed amounts of about  and     onto      complexes, respectively, and for  as reference adsorbent. These results indicated the adsorption of phosphate anions   by the two prepared Algerian modified organo clays through interactions by the chemisorptions on the surface sites of each used modified clay complexes.


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