1 Ocak 2012 Dergi makalesi Açık Erişim

Idrees, Muhammad; Silva, Marcelo; Silva, Alessandra F.; Zimmermann, Lizandra M.; Bruch, Jociane; Mendonca, Caio O.; Almerindo, Gizelle I.; Nome, Rene A.; Atvars, Teresa D. Z.; Fiedler, Haidi D.; Nome, Faruk

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{
  "DOI": "10.1021/jp2089164", 
  "abstract": "Chemical composition and species distribution in clay surfaces are key factors which control sorption and desorption processes of Cr3+ between sediment and water. Adsorption of Cr3+ on silica gel has been studied by following the quenching of naphthalene fluorescence in aqueous sodium dodecyl sulfate (SDS) micelles, which concentrate naphthalene and Cr3+ in the micellar surface. Adsorption for pH <= 5 follows a Langmuir model, and experimental data fitting is successfully described by a model based on discrete sites on the surface with variable charge as a function of pH. Probably the mechanism of Cr3+ adsorption at the silica gel surface is predominantly electrostatic, with outer-sphere complexation and ion exchange with adsorbed H+ ions. Confocal laser-scanning fluorescence microscopy measurements reveal the Cr3+ spatial distribution in three dimensions. Specifically, both images and spectra measured with confocal microscopy indicate that Cr3+ is distributed across the entire particle, not just adsorption at the surface.", 
  "author": [
    {
      "family": "Idrees", 
      "given": " Muhammad"
    }, 
    {
      "family": "Silva", 
      "given": " Marcelo"
    }, 
    {
      "family": "Silva", 
      "given": " Alessandra F."
    }, 
    {
      "family": "Zimmermann", 
      "given": " Lizandra M."
    }, 
    {
      "family": "Bruch", 
      "given": " Jociane"
    }, 
    {
      "family": "Mendonca", 
      "given": " Caio O."
    }, 
    {
      "family": "Almerindo", 
      "given": " Gizelle I."
    }, 
    {
      "family": "Nome", 
      "given": " Rene A."
    }, 
    {
      "family": "Atvars", 
      "given": " Teresa D. Z."
    }, 
    {
      "family": "Fiedler", 
      "given": " Haidi D."
    }, 
    {
      "family": "Nome", 
      "given": " Faruk"
    }
  ], 
  "container_title": "JOURNAL OF PHYSICAL CHEMISTRY C", 
  "id": "86721", 
  "issue": "5", 
  "issued": {
    "date-parts": [
      [
        2012, 
        1, 
        1
      ]
    ]
  }, 
  "page": "3517-3523", 
  "title": "Interaction of Cr3+ with Silica Gel at the Aqueous Interface Using Fluorescence in Sodium Dodecyl Sulfate Micelles and Confocal Fluorescence Microscopy", 
  "type": "article-journal", 
  "volume": "116"
}