fixed-bed column adsorptive removal of cr(vi) using silver oxide/sawdust nanocomposite

this study describes removal of cr(vi) ions from aqueous solutions using silver oxide sawdust nanocomposite (ag₂o/sd nc) prepared by chemical precipitation rout. scanning electron microscopy (sem) and x-ray diffraction (xrd) techniques were used for characterization of the prepared nc. the effect of various parameters such as feed concentration, feed flow rate and adsorbent amount on the breakthrough curves (btc) was investigated. two well-known column adsorption kinetics models including thomas and bed depth service time (bdst) were applied to fitting the non- equilibrium experimental data. desorption studies reveals that recovery of uploaded cr(vi) from ag₂o/sd nc or exhausted column regeneration can readily be achieved using a dilute solution of naoh.