Regeneration of Insulating Mineral Oil by Carbonated Amorphous Calcium Phosphate–Chitosan Adsorbent |
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| Institution: | 1. Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil;2. Centrais Elétricas de Santa Catarina S. A. (CELESC), Santa Catarina, Brazil;1. Universidade Federal do Pará (UFPA) Instituto de Ciências Exatas e Naturais, Faculdade de Estatística and Faculdade de Ciências da Computação, Rua Augusto Correa, 01, CEP: 66075-110, Belém, PA, Brazil;2. Centro de Tecnologia da ELETRONORTE, Rodovia Arthur Bernardes, s/n – Miramar, Telégrafo sem Fio, CEP: 66.115-000, Belém, PA, Brazil;1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China;2. Zhaoqing Science and Technology Center, Zhaoqing 526020, PR China;1. INFN, Laboratori Nazionali del Gran Sasso, I-67100 Assergi (AQ), Italy;2. INFN sezione Roma, I-00185 Rome, Italy;3. Dipartimento di Fisica, Università di Roma “La Sapienza”, I-00185 Rome, Italy;4. INFN sezione Roma “Tor Vergata”, I-00133 Rome, Italy;5. Dipartimento di Fisica, Università di Roma “Tor Vergata’, I-00133, Rome, Italy;6. Department of Physics, Queen’s University, Kingston, ON K7L 3N6, Canada;7. V.S. Sobolev Institute of Geology and Mineralogy of the Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia;8. Nikolaev Institute of Inorganic Chemistry, 630090 Novosibirsk, Russia |
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| Abstract: | In this study carbonated amorphous calcium phosphate (CACP) microparticles were prepared for use as an alternative adsorbent to replace bauxite in the removal of polar compounds present in mineral oil previously used in transformers. Chitosan was used to bind the adsorbent CACP microparticles together. This material showed a better performance than bauxite in relation to the colour and interfacial tension (IT) of regenerated oil. Also, this adsorbent may offer an interesting alternative environmentally since, after extraction of the residual oil with an organic solvent it could be disposed of in soil providing macronutrients such as calcium, carbon, nitrogen and phosphorous. |
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