Effects of supercritical carbon dioxide on waste banana peels for heavy metal removal

Autor(es)

Albarelli, Juliana Q. ^[1] ; Rabelo, Rodrigo B. ^[1] ; Santos, Diego T. ^[2] ; Beppu, Marisa M. ^[1] ; Meireles, M. Angela A. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Chem Engn, UNICAMP, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, LASEFI DEA FEA, Sch Food Engn, UNICAMP, BR-13083862 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF SUPERCRITICAL FLUIDS; v. 58, n. 3, p. 343-351, OCT 2011.
• Citações Web of Science: 32

Resumo

The effects of supercritical carbon dioxide (CO(2)) on waste banana peels for copper adsorption were evaluated. Supercritical CO(2) was employed both in a solvent extraction for antioxidant compound recovery and in an emerging biomass treatment to increase the subsequent heavy metal-removal step; the latter is termed ``explosion with supercritical CO(2){''}. This lignocellulosic biomass was analyzed before and after being subjected to both processes by scanning electron microscopy and X-ray patterning. Thermal gravimetric and differential scanning calorimetry analyses were performed to understand the different effects of supercritical carbon dioxide employed in these two processes on banana peels. The explosion with supercritical CO(2) process resulted in a more pronounced effect on the vegetable structure. Nevertheless, no increase in the copper-removal capacity was achieved. The adsorption studies showed similar behaviors for fresh and extracted samples, demonstrating that banana peels previously extracted with supercritical CO(2) retained their adsorption capacity for subsequent heavy metal removal. (C) 2011 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 10/02819-9 - Obtenção de membranas de quitosana derivatizadas com agentes quelantes polidentados e caracterização da sua capacidade de adsorção de íons metálicos
• Beneficiário: Rodrigo Balloni Rabelo
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 10/16485-5 - Avaliação técnica e econômica da integração de processos sustentáveis visando um melhor aproveitamento do ginseng brasileiro (Pfaffia glomerata)
• Beneficiário: Diego Tresinari dos Santos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado