Behaviour of Silica and Florisil as Solid Supports in the Removal Process of As(V) from Aqueous Solutions
| Autor: | Mihaela Ciopec, Lavinia Lupa, Corneliu Mircea Davidescu, Andreea Gabor, Adina Negrea |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution lcsh:QD71-142 Article Subject Scanning electron microscope Chemistry General Chemical Engineering Inorganic chemistry lcsh:Analytical chemistry Nanotechnology Activation energy Computer Science Applications Analytical Chemistry Adsorption Specific surface area Fourier transform infrared spectroscopy Selectivity Instrumentation Crown ether Research Article |
| Zdroj: | Journal of Analytical Methods in Chemistry, Vol 2015 (2015) Journal of Analytical Methods in Chemistry |
| ISSN: | 2090-8865 |
| DOI: | 10.1155/2015/562780 |
| Popis: | In this study two solid supports, silica and florisil, were impregnated with crown ether (dibenzo-18-crown-6) and Fe(III) ions and their efficiency was compared in the adsorption process of As(V) from aqueous solutions. The solid supports were impregnated with crown ether due to their ability to build complexes with positives ions. Fe(III) was used because of As(V) affinity for it. The impregnated solid supports were characterized by energy dispersive X-ray analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, and the specific surface area. The influence of the solid : liquid ratio on the adsorption process, kinetic studies for the pseudo-first-order and pseudo-second-order, and activation energy were studied. Thermodynamic studies as well as equilibrium studies were carried out. The obtained results showed that, from the two considered materials, impregnated silica presents a higher efficiency with a good selectivity, able to remove As(V) from aqueous solutions containing trace concentrations. |
| Databáze: | OpenAIRE |
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