A Study of the Uptake of Copper Ions by Nano-Structured Calcium Silicate

  • Autor:

    Cairns, M. / Borrmann, T. / Höll, W. H. / Johnston, J. H. (2006)
  • Quelle:

    Microporous and Mesoporous Materials 95 (2006), 1–3, 126–134
  • Datum: 2006

  • Cairns, M. / Borrmann, T. / Höll, W. H. / Johnston, J. H. (2006): „A Study of the Uptake of Copper Ions by Nano-Structured Calcium Silicate“. In: Microporous and Mesoporous Materials 95 (2006), 1–3, 126–134

Abstract

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Presented is astudy of the removal of copperions from dilute aqueous solutions by nanostructured calciumsilicate. Two different copper sources, copper nitrate and copper chloride, at various concentrations ranging from 10 to 5000 mg kg−1copper have been investigated. The uptake of copperions from aqueous solutions at concentrations below 500 mg kg−1 is 97% and higher within 30 min at silicate loadings of 1 g kg−1. The formation of crystals of copper hydroxide nitrate, Cu2(OH)3NO3, and copper chloride hydroxide, Cu2(OH)3Cl, on the surface of the silicate have been observed. Reaction rates and possible mechanisms characterising the uptake have been investigated and discussed.