a kinetic study on adsorption of congo red from aqueous solution by zno-znfe2o4-polypyrrole magnetic nanocomposite

Authors

asma karamipour

payame noor university nahid rasouli

payame noor university maryam movahedi

payame noor university hossein salavti

payame noor university

abstract

in this work, magnetically separable zno-znfe2o4-ppy nanocomposite as an efficient adsorbent was synthesized by two steps. at first, zinc oxide (zno) and znfe2o4 nanoparticles were synthesized using simple and facile precipitation method. then, zno-znfe2o4 mixed oxide was modified by polypyrrole (ppy). the adsorbent was characterized by x-ray diffraction (xrd), fourier transform infrared (ft-ir), uv-vis and scanning electron microscopy (sem). the synthesized nanocomposite were used as adsorbent to remove congo red dye from aqueous solution and were compared with pure zno and zno-ppy adsorbents. the zno-znfe2o4-ppy nanocomposite adsorbent showed a superior congo red removal efficiency than zno and zno-ppy adsorbents. this efficiency is attributed to the charge of surface obtained in nanocomposite adsorbent. furthermore, the adsorption kinetics of congo red onto the nanocomposite followed by the pseudo-second-order kinetic model.

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Journal title:
physical chemistry research

جلد ۴، شماره ۲، صفحات ۲۹۱-۳۰۱

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