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Chemically Modified CaO/Fe 3 O 4 Nanocomposite by Sodium Dodecyl Sulfate for Cr(III) Removal from Water
Author(s) -
Tamjidi Sajad,
Esmaeili Hossein
Publication year - 2019
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800488
Subject(s) - adsorption , aqueous solution , exothermic reaction , sodium dodecyl sulfate , chemistry , langmuir adsorption model , langmuir , nanocomposite , sulfate , sodium sulfate , inorganic chemistry , ion , sodium , materials science , chromatography , nanotechnology , organic chemistry
A CaO/Fe 3 O 4 nanocomposite was modified by sodium dodecyl sulfate (SDS) and used for Cr(III) removal from aqueous solution. The physical and surface characteristics of the adsorbent were studied by different analysis techniques. The effects of key parameters such as pH, contact time, temperature, initial concentration of Cr(III) ions, and adsorbent dose were investigated at a fixed mixing rate. Parameters were optimized to attain the best possible removal efficiency of Cr(III) ions. The maximum adsorption capacities obtained from the Langmuir model were determined. The results of equilibrium and kinetic studies indicate that the adsorption process follows the Langmuir isotherm model and the pseudo‐second‐order kinetic model. The thermodynamic study demonstrated that the adsorption process was suitable, spontaneous, and exothermic.