Effective management of tannery effluent is needed for this time. Tanning industry is one of the worst industries from an environmental point of view, where is the prominent sources of pollution to the aquatic environment. Wet-finishing effluent is the most dangerous step which generate the obnoxious effluent in the tanning industry. The conventional treatments of such waste showed deficiency to coop with the required limits of national regulatory standards. In the present study an advanced oxidation technique based on modification of Fenton reaction combined with high porous nanomaterials was applied as an alternative treatment. Variable doses of H2O2, Fe+2, CaO and pH were investigated to determine the optimum operating conditions. The obtained results indicated a good quality of the treated effluent. Residual concentrations of COD, BOD and TSS were 98.51%, 98.11% and 98.82% removal, respectively. The most obnoxious material (Cr) was highly removed (98.92%). Also, decolorization value (YCOL values) was obtained using Nano GO (99%) and/or active charcoal (88.08 %) with CaO. The residual effect of H2O2 was reduced by MnO2, SnO and Fe powder than sod. thiosulphate. The treated effluent could meet to the National regulatory standard for discharging into the sewerage systems with respect to the studied parameters.