Barbosa, S.L.; Nelson, D.L.; Miranda, S.E.O.; dos Santos, W.T.P.; Wentz, A.P.; Lira, H.N.F.; Pessoa, F.L.P.; Agblevor, F.A.; Bortoleto, D.A.; Freitas-Marques, M.B.D.; Mussel, W.D.N.; Zanatta, L.D. Removal of Copper Ions from Distilled Sugar Cane Spirits by Adsorption on Red Mud. Preprints2023, 2023030537. https://doi.org/10.20944/preprints202303.0537.v1
Barbosa, S.L., Nelson, D.L., Miranda, S.E.O., dos Santos, W.T.P., Wentz, A.P., Lira, H.N.F., Pessoa, F.L.P., Agblevor, F.A., Bortoleto, D.A., Freitas-Marques, M.B.D., Mussel, W.D.N., & Zanatta, L.D. (2023). Removal of Copper Ions from Distilled Sugar Cane Spirits by Adsorption on Red Mud. Preprints. https://doi.org/10.20944/preprints202303.0537.v1
Barbosa, S.L., Wagner da Nova Mussel and Lucas D. Zanatta. 2023 "Removal of Copper Ions from Distilled Sugar Cane Spirits by Adsorption on Red Mud" Preprints. https://doi.org/10.20944/preprints202303.0537.v1
The presence of copper in distilled sugar cane spirits, especially cachaça produced in alembics, has impeded the marketing of this product. Red mud (RM) is a residue obtained from alumina production. It contains a high concentration of metal oxides and is very alkaline. The RM was dried at 100 oC and sifted through a 150-micron sieve. The sample was characterized by B.E.T. nitrogen adsorption, scanning electron microscopy-energy-dispersive X-ray (SEM-EDX) and Atomic Absorption Spectrometry (A.A.S.). The textural parameters indicate that the total surface area (S.T.) was 21.9 m2g-1, and the total volume pore (V.T.) was 0.09 cm3g-1. The RM (1 g) was stirred for two hours with a 1.0 L cachaça sample containing 9.39 mg of copper L-1 and filtered under atmospheric pressure. The concentration of copper ions detected in the filtrate was 0.00 mg L-1. No copper ions were retained when the cachaça was filtered through the RM under high pressure without stirring prior to filtration.
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