Removal of copper ions from alembic <i>cachaça</i> using agro-industrial residues as biosorbents

Honorato, Karina Rodrigues; Reck, Isabela Maria; Oliveira, Alessandra Marjorie de; Bergamasco, Rosângela; Vieira, Angélica Marquetotti Salcedo; Gomes, Raquel Guttierres

doi:10.1080/19440049.2022.2087920

Cited by 2 publications

(1 citation statement)

References 33 publications

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“…However, high concentrations of copper can lead to epilepsy, melanoma, rheumatoid arthritis, and the loss of the sense of taste [7,8]. Various methods for the removal of copper from cachaça utilizing clay [9], clay and charcoal [10], sugar cane bagasse [11], and agricultural and industrial residues [12] have been tested, as well as highly adsorptive synthetic materials [13], activated charcoal, CaCO3, MgCO3, aluminosilicates, and bentonite [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Removal of Copper Ions from Distilled Sugar Cane Spirits by Adsorption on Red Mud

Barbosa¹,

Nelson²,

Miranda³

et al. 2023

Preprint

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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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