Removal of crystal violet from water by magnetically modified activated carbon and nanomagnetic iron oxide

Magnetically modified activated carbon, which synthesized by nanomagnetic iron oxide, was used for fast andeffective removal of crystal violet from aqueous solutions. the scanning electron microscopy (sem) images ofnano-adsorbent showed that the average sizes of adsorbent are less than 100 nm. the various parameters, affectingon adsorption process, were examined including ph and temperature of dye solution, dose of adsorbent, andcontact time. then, thermodynamic parameters of sorption were calculated. langmuir and freundlich isotherms wereused to fit the resulting data. adsorption kinetics was consistent with a pseudo second order equation. thermodynamicparameters of adsorption, ?h0, and ?s0 were calculated. also, for further investigations, nano magnetic iron oxides wassynthesized and used as adsorbent. sorption capacities were depending on the temperature varied from 44.7 to67.1 mg/g and from 12.7 to 16.5 mg/g for magnetically modified activated carbon and nanomagnetic iron oxide,respectively.