Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/61905
Type: Artigo de periódico
Title: New thiol adsorbent grafted on silica gel: synthesis, characterization and employment for heavy metal adsorptions
Author: Arakaki, LNH
Augusto, VLS
Espinola, JGP
da Fonseca, MG
de Oliveira, SF
Arakaki, T
Airoldi, C
Abstract: Silica gel surface has been modified in two reaction steps: (i) the silylating agent 3-mercaptopropyltrimetox silane was firstly immobilized to give a surface Sil-SH and (ii) this precursor incorporated an ethylene Sulfide molecule to obtain the surface denoted Sil-SSH. This material was characterized by elemental analysis. IR spectroscope. thermogravimetry, solid state and C-13 and Si-29 NMR, and surface area measurement. These materials were employed as adsorbents for divalent heavy cations from aqueous Solutions at room temperature and the isotherms were adjusted to a modified Langmuir equation. The maxima number of moles adsorbed were 1.0, 1.5, 1.6, 2.2, 2.4 and 3.1 mmol g(-1) for Co, Cu, Ni, Cd, Pb. and Hg, respectively.
Country: Inglaterra
Editor: Royal Soc Chemistry
Rights: embargo
Identifier DOI: 10.1039/b212124g
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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