MANUFACTURING METHOD OF MAGNETITE NANO-PARTICLES FROM LOW GRADE IRON ORES USING A SOLVENT EXTRACTION PROCESS CAPABLE OF SUPPLYING A MASSIVE AMOUNT OF HIGHLY EFFICIENT MAGNETITE NANO-PARTICLE ABSORBENTS FOR WASTE WATER TREATMENT AT LOW COSTS, AND MAGNETITE NANO-PARTICLES PRODUCED USING THE SAME

摘要

PURPOSE: A magnetite nanoparticle production method is provided to produce high-purity magnetite nanoparticles with low costs by a solvent extraction process using low grade iron ore as a starting material.;CONSTITUTION: A magnetite nano-particle production method includes the following steps; an iron ore extracting solution is obtained by agitating iron ore powder and an acid solution; supernatants are obtained by centrifuging the iron ore extracting solution; Fe2+ ion is oxidized into Fe3+ ion by adding an oxidization agent into the supernatants; an iron-solvent extracting agent complex is separated by adding a solvent extracting agent into an aqueous solution with Fe3+; the aqueous solution with Fe3+ is separated by adding distilled water into the separated iron-solvent extracting agent complex; an aqueous solution with Fe2+ ion is made by adding a reducing agent into the part of the aqueous solution containing Fe3+; an iron salt mixed solution is produced adding the aqueous solution with Fe2+ into the aqueous solution with remaining Fe3+ and magnetite nano-particle is produced by the reaction between the iron salt mixed solution and an aqueous alkali solution. The solvent extracting agent in the iron-solvent extracting agent separation step includes a modifying agent, a dilution agent, and a neutron extraction agent.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Iron ore; (BB) Iron ore powder; (CC) Iron ore extracting solution; (DD) Fe^3+ ions in the solution; (EE) Fe_3O_4 nano-particles; (FF) Crushing/sieve; (GG) Meltage; (HH) Oxidation/solvent extraction method; (II) Reduction/coprecipitation