Abstract: Nano-Materials have unique properties physical, chemical, optical, catalytic and electrical made a prominent candidate for waste water purification.

       Nano-sized metal oxides have unique properties. The most important feature is large surface volume ratio, which is suitable for different form of water treatment (adsorption, photo catalysis, membrane process Nano size metal oxides(NMOS), including ferric oxides, manganese oxides, Aluminum oxides, titanium oxides, magnesium oxides, zinc oxide and Cerium oxides, provide high surface area and specific affinity for heavy metal adsorption from aqueous systems. The Municipal and industrial solid waste are another important source of pollution ,which are consider a main source of the heavy metal like Hg, Cd, Fe, Mn, Pb, and the treatment of these wastes must be agreed with the environmental standard before it is reused or returned to surface water.

Keywords: Novel adsorbent, Nano - particles, Wastewater, Heavy metals.