| Titre : | Chelating resins silica gel supported aminophosphonic acids prepared by a heterogeneous synthesis method and a homogeneous synthesis method and the removal properties for Hg(II) from aqueous solutions (2012) |
| Auteurs : | Zengdi Wang, Auteur ; Ping Yin, Auteur ; Zhi Wang, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 25, Juin 2012) |
| Article en page(s) : | pp. 8598-8607 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Aqueous solution Silica gel |
| Résumé : | Two kinds of composites silica gel supported by aminophosphonic acids SG-T-P-1 and SG-T-P-2 were prepared successfully by functionalization of silica gel via a heterogeneous synthesis method and a homogeneous synthesis method, respectively, and they were characterized by infrared spectra (IR), scanning electron microscope (SEM), and energy dispersive X-ray analysis system spectrum (EDXAS). Moreover, the static adsorption capabilities of these two chelating resins toward transition-metal ions were studied. Our objective was to choose the adsorbent with high adsorption capacities via different synthesis methods, and the results showed that SG-T-P prepared via a homogeneous synthesis method had excellent adsorption capacities and high adsorption selectivity for Hg(II) ions. The Langmuir model was better than the Freundlich model to fit the adsorption isotherms of SG-T-P for Hg(II), and the maximum adsorption capacity was 303.03 mg/g at 15 °C. Thus, the novel chelating resin silica gel supported by aminophosphonic acids SG-T-P prepared by a homogeneous synthesis method is favorable and useful for the removal of Hg(II) ions from aqueous solutions. |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26066786 |
