Removal of Copper from Water by Adsorption with Calcium-Alginate/Spent-Coffee-Grounds Composite Beads
| Autor: | Luis Alamo-Nole, Roberto Torres-Caban, Carmen A Vega-Olivencia, Nairmen Mina-Camilde, Daisy Morales-Irizarry, Felix R. Roman-Velazquez |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Langmuir
Calcium alginate Kinetics chemistry.chemical_element kinetics of adsorption 02 engineering and technology 010501 environmental sciences calcium alginate 01 natural sciences lcsh:Technology Article symbols.namesake chemistry.chemical_compound Adsorption General Materials Science Freundlich equation lcsh:Microscopy 0105 earth and related environmental sciences lcsh:QC120-168.85 water pollution Aqueous solution lcsh:QH201-278.5 removal of copper lcsh:T Langmuir adsorption model 021001 nanoscience & nanotechnology Copper spent coffee grounds chemistry lcsh:TA1-2040 symbols lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 Nuclear chemistry |
| Zdroj: | Materials, Vol 12, Iss 3, p 395 (2019) Materials Volume 12 Issue 3 |
| ISSN: | 1996-1944 |
| Popis: | Calcium Alginate/Spent-Coffee-Grounds composite beads (CA-SCGs beads), which were made of two different proportions of alginate and spent-coffee-grounds (3:3 and 3:10), respectively, were used to adsorb Cu2+ in aqueous solution. These beads were compared with calcium alginate beads (CA beads) and spent-coffee-grounds (SCGs) in terms of adsorption capacity and rate of adsorption. The experiments were carried out at an initial pH of 4 at 30 ° C with initial concentrations of Cu2+ from 10 ppm to 100 ppm. Equilibrium data was fitted with Langmuir, Freundlich and Sips models, and a pseudo-second-order kinetic equation. The Sips model showed the best correlation with the experimental values. CA-SCGs (3:3) beads showed a faster adsorption rate versus the CA beads. Also, CA-SCGs (3:3) beads showed a larger capacity of adsorption according to the Sips model, but not in the Langmuir model. FT-IR spectra and SEM images were taken for characterization. This study has shown that the CA-SCGs (3:3) beads have a synergistic effect, combining the capacity of adsorption of CA beads with the kinetics of the SCGs. The CA-SCGs beads have proven to be an effective adsorbent of Cu2+. Therefore, they can provide a use for the SCGs which are considered pollutants in landfills. |
| Databáze: | OpenAIRE |
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