Direct dyes removal using modified magnetic ferrite nanoparticle

The magnetic adsorbent nanoparticle was modified using cationic surface active agent. zinc ferrite nanoparticleand cetyl trimethylammonium bromide were used as an adsorbent and a surface active agent, respectively. dyeremoval ability of the surface modified nanoparticle as an adsorbent was investigated. direct green 6 (dg6), directred 31 (dr31) and direct red 23 (dr23) were used. the characteristics of the adsorbent were studied using fouriertransform infrared (ftir), scanning electron microscopy (sem) and x-ray diffraction (xrd). the effect of adsorbentdosage, initial dye concentration and salt was evaluated. in ternary system, dye removal of the adsorbent at 90, 120,150 and 200 mg/l dye concentration was 63, 45, 30 and 23% for dr23, 97, 90, 78 and 45% for dr31 and 51, 48, 42and 37% for dg6, respectively. it was found that dye adsorption onto the adsorbent followed langmuir isotherm.the adsorption kinetic of dyes was found to conform to pseudo-second order kinetics.