Application of Anodic Stripping Voltammetry to assess sorption performance of an industrial waste entrapped in alginate beads to remove As(V)
| Autor: | Francesca Garlaschelli, Núria Fiol, Isabel Villaescusa, Giancarla Alberti |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Sorbent
Calcium alginate Chemistry(all) General Chemical Engineering Waste (hydr)oxide Analytical chemistry 02 engineering and technology 010501 environmental sciences 01 natural sciences Calcium alginate beads Industrial waste Metal lcsh:Chemistry symbols.namesake chemistry.chemical_compound Anodic Stripping Voltammetry Voltammetry 0105 earth and related environmental sciences Chemistry Langmuir adsorption model Sorption General Chemistry As(V) removal 021001 nanoscience & nanotechnology Voltametria Anodic stripping voltammetry Chemical engineering lcsh:QD1-999 visual_art visual_art.visual_art_medium symbols Chemical Engineering(all) 0210 nano-technology |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Arabian Journal of Chemistry, Vol 10, Iss S1, Pp S1014-S1021 (2017) © Arabian Journal of Chemistry, 2017, vol. 10, sup.1, p. 1014-1021 Articles publicats (D-EQATA) DUGiDocs – Universitat de Girona |
| ISSN: | 1878-5352 |
| DOI: | 10.1016/j.arabjc.2013.01.003 |
| Popis: | Solid waste material containing Fe(III) and other metal (hydr)oxides produced in a metal surface treatment industry has been investigated for As(V) removal. In order to facilitate sorbent application, 2% of raw material has been entrapped in calcium alginate gel matrix (2% O-CA). An accurate characterization of the sorption on gel beads was undertaken, considering thermodynamic and kinetic aspects. All experiments were carried out at pH 8, since the maximum As(V) sorption was reached between pH 6 and 9. About isotherms, the best fit was obtained considering the Langmuir model and a capacity of 1.9 mg/g was achieved. The kinetic profiles evidenced that a quantitative sorption was obtained within 10 h. The 2% O-CA beads were also tested for continuous As(V) removal in a fixed bed column. Experiments were performed at constant flow rate, and varying the inlet As(V) concentration. With a view to design an automatic system for As(V) analysis in the outlet flow, the suitability of applying Anodic Stripping Voltammetry was evaluated: the method resulted appropriated to follow the As(V) content in the outlet solutions of columns with metal inlet concentration |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|