| Titre : | Polyacrylonitrile / silica nanospheres with three - dimensional interpenetrating network structure and their application for removal of Pb (II) from water (2012) |
| Auteurs : | Qingchun Zhao, Auteur ; Tian Cao, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 13, Avril 2012) |
| Article en page(s) : | pp. 4952–4957 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | Nanospheres Thermogravimetric analysis Adsorption Aqueous solutions |
| Résumé : | Polyacrylonitrile/silica nanospheres with three-dimensional interpenetrating network structure have been synthesized via emulsion polymerization method using 0.08 g azobisisbutyronitrile (AIBN) as initiator, 5 g acrylonitrile, and 5 g γ-methacryloxypropyl trimethoxy silane as monomer, 0.85 g dodecylbenzene sulfate as emulsifier at 60 °C for 10 h. The composition and morphology of the obtained nanospheres were investigated by infrared spectrum, thermogravimetric analysis, and scanning electron microscopy, respectively. The obtained polyacrylonitrile/silica nanospheres were used to investigate adsorption Pb(II) from aqueous solutions. The research results display that composite material has high adsorption capacity at optimum pH = 5. The maximum adsorption capacity was 0.108 mmol/g within 300 min at 25 °C. The pseudo-first-order equation and the pseudo-second-order equation are applied to analyze the experimental data. Adsorption behavior for Pb(II) onto nanospheres belongs to the pseudo-second-order kinetic model, and the adsorption process is a chemical process. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie3000024 |
