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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 6, No. 3, 2003, pp. 174-184
Bioline Code: ej03022
Full paper language: English
Document type: Research Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 6, No. 3, 2003, pp. 174-184

 en An evaluation of copper biosorption by a brown seaweed under optimized conditions
Antunes, Wallace M.; Luna, Aderval S.; Henriques, Cristiane A. & da Costa, Antonio Carlos A.

Abstract

A basic investigation into the removal of copper ions from aqueous solutions by Sargassum check for this species in other resources sp. was conducted in batch conditions. The influence of different experimental parameters such as initial pH, shaking rate, sorption time, temperature, equilibrium conditions and initial concentrations of copper ions on copper uptake was evaluated. Results indicated that for shaking rates higher than 100 rpm no significant changes in copper accumulation were observed, as well as for pH values between 3.0 and 5.0. No marked effect on the biosorption of copper was detected for temperatures between 298 and 328K. The Langmuir model better represented the sorption process, in comparison to the model of Freundlich. The process followed a second-order kinetics and its calculated activation energy was 5.2 kcal/mol. Due to its outstanding copper uptake capacity (1.48 mmol/g biomass) Sargassum sp. proved to be an excellent biomaterial for accumulating and recovering copper from industrial solutions.

Keywords
biosorption, copper, equilibrium, kinetics, Sargassum sp.

 
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