• study on the adsorption of cu(ii) by edta functionalized fe3o4 magnetic nano-particles

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 527
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the edta functionalized magnetic nano-particles (mnps-edta) as a novel magnetic nano-adsorbent have been prepared by a simple one-pot method for the removal of cu(ii) from aqueous solution. factors affecting the adsorption of cu(ii) on mnps-edta, such as contact time, temperature, ph, salinity, and initial concentration of cu(ii), were investigated. the studies on the adsorption revealed that the adsorption process obeyed the pseudo-second order kinetic model, the determining step might be chemical sorption and the adsorption equilibrium could be achieved in 5 min. among the various isotherm models, the experimental data for the adsorption of cu(ii) followed the langmuir isotherm best and the maximum adsorption capacities was 46.27 mg g−1 at ph 6.0 and 298 k. thermodynamic parameters declared that the adsorption process was endothermic and spontaneous. the removal efficiencies of cu(ii) were over 98.3% and inappreciably influenced by the water matrix. in addition, the adsorption–desorption studies indicated that mnps-edta had a high stability and good reusability.

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