Biosorption of copper ions from aqueous solution using Chlorella pyrenoidosa: Optimization, equilibrium and kinetics studies
| Autor: | Victor Rezende Moreira, S. J Freire, Yuri Abner Rocha Lebron, Lucilaine Valéria de Souza Santos, Fernanda Palladino, Raquel Sampaio Jacob |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Aqueous solution
biology Chemistry 010401 analytical chemistry Inorganic chemistry Kinetics Enthalpy Biosorption Langmuir adsorption model chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology biology.organism_classification 01 natural sciences Copper 0104 chemical sciences Analytical Chemistry symbols.namesake Adsorption symbols Chlorella pyrenoidosa 0210 nano-technology Spectroscopy |
| Zdroj: | Microchemical Journal. 145:119-129 |
| ISSN: | 0026-265X |
| DOI: | 10.1016/j.microc.2018.10.027 |
| Popis: | The heavy metals biosorption from aqueous solution using microalgae has attracted attention, but studies related to the process of copper biosorption by C. pyrenoidosa are scarce. The present work aimed to characterize, verify thermodynamic viability and optimize the copper biosorption by C. pyrenoidosa using a Box-Behnken factorial design. The adsorbent had a particle diameter ranging from 14.13 to 123.6 μm, with macropores of 1.868 ± 0.337 μm. The infrared spectra suggested a physical adsorption mechanism that was later proven by the enthalpy change (48.318 kJ·mol−1) and the parameters obtained from Temkin and Dubinin-Radushkevich isotherms. Furthermore, the process was best described by the Langmuir isotherm and a pseudo second order kinetics. The model optimization was achieved in order to maximize the percentage of copper removal, corresponding to 83.14% when the algae concentration was 1.28 g·L−1, 5 mg·L−1 of copper ions and pH 6.33. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect