dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.contributor | Universidade Federal de Mato Grosso do Sul (UFMS) | |
dc.contributor | Universidade Estadual de Campinas (UNICAMP) | |
dc.date.accessioned | 2014-05-20T13:29:56Z | |
dc.date.accessioned | 2022-10-05T13:30:41Z | |
dc.date.available | 2014-05-20T13:29:56Z | |
dc.date.available | 2022-10-05T13:30:41Z | |
dc.date.created | 2014-05-20T13:29:56Z | |
dc.date.issued | 2011-01-01 | |
dc.identifier | Polish Journal of Chemical Technology. Warsaw: Versita, v. 13, n. 4, p. 28-33, 2011. | |
dc.identifier | 1509-8117 | |
dc.identifier | http://hdl.handle.net/11449/10148 | |
dc.identifier | 10.2478/v10026-011-0045-2 | |
dc.identifier | WOS:000298872600005 | |
dc.identifier | WOS000298872600005.pdf | |
dc.identifier | 6981448637456391 | |
dc.identifier | 0000-0003-4179-0574 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3886367 | |
dc.description.abstract | A method was developed to attach 2,2-bipyridine (BP) onto a silica gel surface by a two-step reaction. The first step consisted of a reaction between the matrix and a silylating agent, 3-chloropropyltrimeth-oxysilane. In the second step of the reaction, a ligand molecule was attached onto Si-CPTS, yielding the product Si-BP. The modified material contained 0.431 +/- 0.01 mmol of 2,2-bipyridine per gram of modified silica, as confirmed by FT-IR spectra of the proposed structure. The surface modification was characterized by the BET technique, which revealed a decrease in the surface area from 614 to 450 m(2) g(-1). The series of adsorption isotherms for the metal ions were adjusted to fit a modified Langmuir equation. The maximum number of moles of copper, cadmium and lead ions adsorbed was 0.64, 0.53, and 0.54 mmol g-1, respectively. The surface saturation was calculated as phi fraction and the values obtained, Cu(II) = 1.160, Cd(II) = 1.044 and Pb(II) = 0.997, suggest a type 1:1 metal-ligand complex. | |
dc.language | eng | |
dc.publisher | Versita | |
dc.relation | Polish Journal of Chemical Technology | |
dc.relation | 0.550 | |
dc.relation | 0,202 | |
dc.rights | Acesso aberto | |
dc.source | Web of Science | |
dc.subject | 2,2-Bipyridine | |
dc.subject | silica gel | |
dc.subject | adsorption | |
dc.subject | metal ions | |
dc.title | Attachment of 2,2-bipyridine onto a silica gel for application as a sequestering agent for copper, cadmium and lead ions from an aqueous medium | |
dc.type | Artigo | |