Rwcovry of Nickel from Burned Fuel Waste in seawage station

Best chemical conditions for the recovery of nickel as sulphate or oxide from burned fuel waste in seawage stations had been considered. The effects of different factors like acid concentration, acid volume, time of reaction, and pH on the recovery of nickel from the waste have been studied. It was found that the percentage of nickel in the waste (3 6) % and becomes (8 15) % ater the recovery of vanadium. The performance of nickel recovery is 90% and the purity around 98%. Introduction: Nickel is found as a constituent in most meteorites and often serves as one of the criteria for distinguishing a meteorite from other minerals. Nickel is obtained commercially from pentlandite and pyrrhotite. Nickel is silvery white and takes on a high polish. It is hard, malleable, ductile, somewhat ferromagnetic, and a fair conductor of heat and electricity. It belongs to the iron-cobalt group of metals and is chiefly valuable for the alloys it forms (1) . Nickel and magnesium can be recovered in high yields and virtually free from vanadium and each other from natural bitumen ash. The separation of nickel from magnesium for metals recovery can thus be done without interference from high levels of vanadium. For purpose of recovering the nickel, the ion exchange procedure commonly used in the prior art is suitable and the magnesium may be recovered by precipitating the carbonate or hydroxide (2) . The combustion of heavy fuel oil power generation leads to great production of fly ashes, usually disposed off in controlled expensive landfills. Hydrometallurgical processes are used for the recovery of valuable metals such as vanadium and nickel carbonaceous residues, so obtained, could be burned to recover energy (3) . Vanadium and nickel values can be recovered from petroleum residue by a simple and economical process using inexpensive reagents and available equipment (4) . Nickel occurs in nature mainly in combination with arsenic, antimony, and sulphur, for example, as millerite, (NiS), as a red Ni ore that is mainly NiAs, and in deposits containing chiefly ofNiSb, NiAs2, NiAsS, orNiSbS (5) . In this work, nickel is extracted from the solid waste (after extracting vanadium) as nickel sulphate where nickel oxide was prepared thereater (from the sulphate) (6) . Rwcovry of Nickel from Burned Fuel Waste in seawage station Ahmed Jassim Muklive ةيساسلأا ةيبترلا ةيلك ةلمج قحلم ددعلا نوعبسلاو يناثلا 3122 2 Experimental: Apparatus: Heating mantel, beakers, mechanical stirrer, Buckner funnel, chiller (water cooler), and vacuum pump. Chemicals: Sulfuric acid, Ammonium hydroxide, sodium sulphate, burned fuel waste.