An evaluation of copper biosorption by a brown seaweed under optimized conditions

By Wallace M. Antunes, A. Luna, C. Henriques, A. C. A. Costa. 2003

189 citations recorded by the source corpus.

A basic investigation into the removal of copper ions from aqueous solutions by Sargassum 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.

View Paper: https://www.semanticscholar.org/paper/5d41627c56f4f5d8d3d595971b1dc75de1104a27

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Biomass-derived biosorbents for metal ions sequestration: Adsorbent modification and activation methods and adsorbent regeneration (2014, methodology): “The pseudo–first–order kinetic model has been used extensively to describe the sorption of metal ions onto biosorbents [85-104].”