ساخت نانو كامپوزيت سراميكي پرليت اصلاح شده/ نانوذرات اكسيد آهن (Fe3O4) جهت جداسازي جذبي و مغناطيسي نفت از آب

magnetic nanoparticles , separation of oil from water , expanded perlite , hydro‎phobicity , oileophilicity

Fabrication of ceramics nanocomposite of modified perlite/Fe3O4 nanoparticles for absobtion an‎d magnetic separation of oil from wastewater

نانو فناوري

With the increasing progress of the oil field an‎d the increasing need of society for this precious substance, its negative environmental effects are also increasing. Therefore, it is necessary to remove environmental pollution from the environment. The purpose of this thesis is to separate petroleum products such as diesel oil from water an‎d then magnetically separate the composite from water-oil emulsion. To reach this goal, a composite consisting of expan‎ded an‎d modified pearlite an‎d its combination with magnetic iron oxide nanoparticles coated with silica was fabricated an‎d synthesized. In this way, expan‎ded perlite was first surface modified using several hydro‎phobic solutions. The modified perlite can physically absorb the oil inside its cavities with the capillary absorption mechanism, the values of which were obtained using absorption tests, an‎d in the best case, its water absorption rate is from 3.7 to 0.3 (gram of water per gram of composite) an‎d its oil absorption increased from 2.5 to 9.3 (gram of oil per gram of composite). Then, iron oxide magnetic nanoparticles were synthesized by co-precipitation method an‎d coated with silica by Stober method. Next, Fe3O4@SiO2 magnetic nanoparticles were penetrated into pearlite. The composite was characterized an‎d analyzed at each stage by methods such as SEM, XRD, FTIR an‎d VSM, which indicated the successful synthesis of magnetite nanoparticles in the synthesis stage, silica coating in the Stöber process an‎d creating a combination of these particles with pearlite. Also, the absorption rate of EP/Fe3O4@SiO2 composite in two states of surface modification an‎d unmodified surface was also investigated. The results showed that even in the non-hydro‎phobic state, the addition of Fe3O4@SiO2 particles to pearlite increases the oil absorption capacity because the SiO2 layer on the surface of Fe3O4 nanoparticles has the ability to electrostatically absorb oil dro‎plets, so the absorption rate of the composite increases. . In this way, its oil absorption increased from 2.5 to 4.3 (gram of oil per gram of composite). The results showed that after modifying the surface of the composite, the amount of water absorption reached 0.3 (grams of water per gram of composite) an‎d the amount of oil absorption in the mixture of water an‎d oil reached 4.2 (grams of oil per gram of composite). The composite contains Fe3O4 magnetic nanoparticles. Can be easily separated from the water an‎d oil mixture using a permanent magnet an‎d reused up to 4 times after washing in distilled water.

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