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Precious metal recovery by bio / adsorption onto non-conventional bio / adsorbents

Grant number: 13/00732-1
Support type:Regular Research Grants
Duration: September 01, 2013 - August 31, 2015
Field of knowledge:Engineering - Chemical Engineering - Industrial Operations and Equipment for Chemical Engineering
Principal researcher:Melissa Gurgel Adeodato Vieira
Grantee:Melissa Gurgel Adeodato Vieira
Home Institution: Faculdade de Engenharia Química (FEQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Assoc. researchers:Ambrósio Florêncio de Almeida Neto ; Onélia Aparecida Andreo dos Santos


This project aims at characterizing alternatives adsorbents and bio-adsorbents, evaluating its use for recovery of silver in aqueous solution. Assays for silver recovery will be accomplished in finite bath (static system) and fixed bed (dynamic system), preceded by preliminary tests of metal affinity. The characterization methods used will be X-Ray Diffraction (XRD), Infrared Spectroscopy (FTIR), Thermal Analysis (TG and DSC), Scanning Electron Microscopy (SEM) with Energy Dispersive Chemical Analysis by X-ray (EDX) , Measurements of adsorption / desorption of N2 (determination of specific surface area, BET method, average diameter and specific volume of pores and adsorption isotherms), He picnometry and mercury porosimetry. The material characterization will provide information on the adsorptive properties required for the recovery process of silver in bath finite and fixed bed. The results will not only evaluate the adsorbents, but may also assist in defining procedures for the study of other precious or semi-precious metals. (AU)

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Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE FREITAS, EMANUELLE DANTAS; DE ALMEIDA, HEWELLYN JOACY; DE ALMEIDA NETO, AMBROSIO FLORENCIO; ADEODATO VIEIRA, MELISSA GURGEL. Continuous adsorption of silver and copper by Verde-lodo bentonite in a fixed bed flow-through column. JOURNAL OF CLEANER PRODUCTION, v. 171, p. 613-621, . (13/00732-1)
FREITAS, E. D.; CARMO, A. C. R.; ALMEIDA NETO, A. F.; VIEIRA, M. G. A.. Binary adsorption of silver and copper on Verde-lodo bentonite: Kinetic and equilibrium study. APPLIED CLAY SCIENCE, v. 137, p. 69-76, . (13/25212-0, 13/00732-1)
CANTUARIA, MANUELLA L.; DE ALMEIDA NETO, AMBROSIO F.; NASCIMENTO, ERIC S.; VIEIRA, MELISSA G. A.. Adsorption of silver from aqueous solution onto pre-treated bentonite clay: complete batch system evaluation. JOURNAL OF CLEANER PRODUCTION, v. 112, n. 1, p. 1112-1121, . (13/00732-1)
CANTUARIA, M. L.; NASCIMENTO, E. S.; ALMEIDA NETO, A. F.; DOS SANTOS, O. A. A.; VIEIRA, M. G. A.. Removal and Recovery of Silver by Dynamic Adsorption on Bentonite Clay Using a Fixed-Bed Column System. ADSORPTION SCIENCE & TECHNOLOGY, v. 33, n. 2, p. 91-103, . (13/00732-1)

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