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	Provedor de dados Rev. Bras. Ciênc. Solo (2) Autor Chaves,Lucia Helena Garófalo (2) Chorover,Jon (2) Curry,Joan Elizabeth (2) Stone,David Andrew (2) Carducci,Michael D. (1) Palavra-chave Isomorphous substitution (2) LDH (1) Layered double hydroxide (1) Nickel adsorption (1) Nickel incorporation (1) X ray diffraction (1) X-ray diffraction (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2009 (1) 2007 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Fate of nickel ion in (II-III) hydroxysulphate green rust synthesized by precipitation and coprecipitation Rev. Bras. Ciênc. Solo Chaves,Lucia Helena Garófalo; Curry,Joan Elizabeth; Stone,David Andrew; Chorover,Jon. In order to investigate the efficiency of sulfate green rust (GR2) to remove Ni from solution, GR2 samples were synthesized under controlled laboratory conditions. Some GR2 samples were synthesized from Fe(II) and Fe(III) sulfate salts by precipitation. Other samples were prepared by coprecipitation, of Ni(II), Fe(II) and Fe(III) sulfate salts, i.e., in the presence of Ni. In another sample, Ni(II) sulfate salt was added to pre-formed GR2. After an initial X-ray diffraction (XRD) characterization all samples were exposed to ambient air in order to understand the role of Ni in the transformation of the GR2 samples. XRD was repeated after 45 days. The results showed that Nious GR2 prepared by coprecipitation is isomorphous to Ni-free GR2, i.e. Ni is... Tipo: Info:eu-repo/semantics/article Palavras-chave: Nickel incorporation; Nickel adsorption; X-ray diffraction; Isomorphous substitution. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000400021 Nickel incorporation in Fe(II, III) hydroxysulfate Green Rust: effect on crystal lattice spacing and oxidation products Rev. Bras. Ciênc. Solo Chaves,Lucia Helena Garófalo; Curry,Joan Elizabeth; Stone,David Andrew; Carducci,Michael D.; Chorover,Jon. Ni(II)-Fe(II)-Fe(III) layered double hydroxides (LDH) or Ni-containing sulfate green rust (GR2) samples were prepared from Ni(II), Fe(II) and Fe(III) sulfate salts and analyzed with X ray diffraction. Nickel is readily incorporated in the GR2 structure and forms a solid solution between GR2 and a Ni(II)-Fe(III) LDH. There is a correlation between the unit cell a-value and the fraction of Ni(II) incorporated into the Ni(II)-GR2 structure. Since there is strong evidence that the divalent/trivalent cation ratio in GR2 is fixed at 2, it is possible in principle to determine the extent of divalent cation substitution for Fe(II) in GR2 from the unit cell a-value. Oxidation forms a mixture of minerals but the LDH structure is retained if at least 20 % of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Isomorphous substitution; Layered double hydroxide; LDH; X ray diffraction. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500005 Registros recuperados: 2 Primeira ... 1 ... Última

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