Documents disponibles écrits par cet auteur

The cause of highly efficient lead removal with silica spheres modifying the surface by a base catalyst / Kwang-Sun Kang in Industrial & engineering chemistry research, Vol. 51 N° 10 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 4101–4104 Titre : The cause of highly efficient lead removal with silica spheres modifying the surface by a base catalyst Type de document : texte imprimé Auteurs : Kwang-Sun Kang, Auteur Année de publication : 2012 Article en page(s) : pp. 4101–4104 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Silica  spheres  Catalyst Résumé : The surface of silica spheres was modified using 3-mercaptopropyl trimethoxysilane (MPTMS) with an acid catalyst and a base catalyst. Large aggregation was observed for the spheres modified with an acid catalyst. The spheres modified with an acid catalyst (ACS) show aggregated spheres. However, no aggregation was observed for the spheres modified with a base catalyst (BCS). Aqueous lead solutions with 625 and 1663 ppm were used to test the removal of lead ions. Various amounts of modified spheres were treated to the lead solutions. The lead concentration drastically decreased with the increase of the amount of the spheres. The lead removal efficiency for the BCS is much more effective than that of ACS. For more-quantitative analysis of the residual lead concentration, inductive coupled plasma–mass spectrometry (ICP-MS) was employed. As the amount of spheres increased, the lead concentration drastically decreased. The lowest concentration of 1.2 ppb was obtained, which indicates that the lead ion can be completely removed from the aqueous system. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200626m [article] The cause of highly efficient lead removal with silica spheres modifying the surface by a base catalyst [texte imprimé] / Kwang-Sun Kang, Auteur . - 2012 . - pp. 4101–4104. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 4101–4104 Mots-clés : Silica  spheres  Catalyst Résumé : The surface of silica spheres was modified using 3-mercaptopropyl trimethoxysilane (MPTMS) with an acid catalyst and a base catalyst. Large aggregation was observed for the spheres modified with an acid catalyst. The spheres modified with an acid catalyst (ACS) show aggregated spheres. However, no aggregation was observed for the spheres modified with a base catalyst (BCS). Aqueous lead solutions with 625 and 1663 ppm were used to test the removal of lead ions. Various amounts of modified spheres were treated to the lead solutions. The lead concentration drastically decreased with the increase of the amount of the spheres. The lead removal efficiency for the BCS is much more effective than that of ACS. For more-quantitative analysis of the residual lead concentration, inductive coupled plasma–mass spectrometry (ICP-MS) was employed. As the amount of spheres increased, the lead concentration drastically decreased. The lowest concentration of 1.2 ppb was obtained, which indicates that the lead ion can be completely removed from the aqueous system. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200626m