Výsledky vyhledávání - "Vera Lucia S. Augusto Filha"

Thermal study of chelates of Co(II), Cu(II), Ni(II), Cr(III), Mo(III), and Fe(III) with bis(acetylacetone)ethylenediimine on activated silica gel surface

Autor: Vera Lucia S. Augusto Filha, Tomaz Arakaki, J. G. P. Espínola, Maria G. Fonseca, André Leonardo P. Silva, Luiza N.H. Arakaki, Josiane S. Diniz

Publikováno v: Journal of Thermal Analysis and Calorimetry. 97:377-382

The divalent copper, nickel, cobalt and trivalent chromium, molybdenium and iron chelate compounds derived from bis(acetylacetone) ethylenediimine were grafted on activated silica gel using a batch process in methanolic solution. The sequence of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a5167d2bfd14598c39092b5c9d05ad3a
https://doi.org/10.1007/s10973-008-9604-z

Zobrazit plný text záznamu

Chemisorption of divalent cations on a silica gel surface modifield with thioglycolic acid: pH influence and ionic strength

Autor: Maria G. Fonseca, José G.P. Espínola, Victor Hugo Araújo Pinto, Luiza N.H. Arakaki, Vera Lucia S. Augusto Filha, Kaline S. Sousa

Publikováno v: Química Nova, Volume: 30, Issue: 3, Pages: 528-534, Published: JUN 2007
Química Nova v.30 n.3 2007
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ

A novel type of heavy metal adsorbent was prepared by the covalent grafting of thioglycolic acid molecules on a silica gel surface previsiouly modified with 3-aminopropyltrimethoxysilane. The amount of thioglycolic acid immobilized was 1.03 mmol per

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f621186aabdb81a85cd4d515ae3c1860
https://doi.org/10.1590/s0100-40422007000300005

Zobrazit plný text záznamu

Interaction of divalent cations Zn, Cd and Hg on surface of silica gelwith aminoethanethiol as evaluated by calorimetric titration

Autor: Maria G. Fonseca, Vera Lucia S. Augusto Filha, Albaneide F. Wanderley, J. R. da Costa, Oberto G. da Silva, Luiza N.H. Arakaki

Publikováno v: Journal of Thermal Analysis and Calorimetry. 87:621-625

Calorimetric titration was applied to study the interaction of zinc, cadmium and mercury on surface of silica gel modified with 2-aminoethanethiol, using 3-chloropropyltrimetoxysilane as precursor silylating agent. The anchored Sil–SNH2 surface gav

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1c6ed14418c1463483d5a70414c351c5
https://doi.org/10.1007/s10973-006-7756-2

Zobrazit plný text záznamu

Thermodynamic properties of divalent cations complexed by ethylenesulfide immobilized on silica gel

Autor: Kaline S. Sousa, Luiza N.H. Arakaki, José G.P. Espínola, Albaneide F. Wanderley, Maria G. Fonseca, Vera Lucia S. Augusto Filha, Tomaz Arakaki

Publikováno v: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 279:64-68

Thermodynamic data of the energetic interaction of some cations like Cd, Pb, Hg, Cu, Ni, and Co with silica modified by 3-mercaptopropyltrimethoxysilane have been obtained through calorimetric titration. The amount of ethylenesulfide anchored on sili

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::83fb518e8c94275dd688114891736257
https://doi.org/10.1016/j.colsurfa.2005.12.041

Zobrazit plný text záznamu

Silica gel ethyleneimine and its adsorption capacity for divalent Pb, Cd, and Hg

Autor: Luiza N.H. Arakaki, Vera Lucia S. Augusto Filha, José G.P. Espínola, Franklin P. Aguiar, Kaline S. Sousa, Maria G. Fonseca

Publikováno v: Thermochimica Acta. 440:176-180

Activated silica gel was directly modified with a cyclic molecule, ethyleneimine, yielding a surface with various nitrogen basic centers, ≡Sil–O(CH 2 CH 2 NH) n CH 2 CH 2 NH 2 . Infrared spectroscopy, 13 C NMR, thermal, and elemental analyses con

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75ca9f388904c4020190e7e986f4760f
https://doi.org/10.1016/j.tca.2005.11.004

Zobrazit plný text záznamu

New thiol adsorbent grafted on silica gel: synthesis, characterization and employment for heavy metal adsorptions

Autor: Severino F. de Oliveira, José G.P. Espínola, Tomaz Arakaki, Claudio Airoldi, Maria G. Fonseca, Vera Lucia S. Augusto Filha, Luiza N.H. Arakaki

Publikováno v: Journal of Environmental Monitoring. 5:366-370

Silica gel surface has been modified in two reaction steps: (i) the silylating agent 3-mercaptopropyltrimetoxysilane was firstly immobilized to give a surface Sil-SH and (ii) this precursor incorporated an ethylene sulfide molecule to obtain the surf

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c920cfab127694d2860286671e5105d3
https://doi.org/10.1039/b212124g

Zobrazit plný text záznamu

Akademický článek

Quimissorção de cátions divalentes em sílica gel modificada com ácido tioglicólico: a influência do pH e força iônica Chemisorption of divalent cations on a silica gel surface modifield with thioglycolic acid: pH influence and ionic strength

Autor: Kaline S. de Sousa, Vera Lúcia S. Augusto Filha, Victor Hugo e A. Pinto, Maria G. da Fonseca, José G. P. Espínola, Luiza N. H. Arakaki

Publikováno v: Química Nova, Vol 30, Iss 3, Pp 528-534 (2007)

Externí odkaz: https://doaj.org/article/fed94d6976a14bbf96f0921b2940c62b

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání