Effects of Aspartic Acid on Calcite Dissolution Rate and Solubility

  • Toru Yoshino
    Geochemical Laboratory, Graduate School of Science, The University of Tokyo
  • Hiroyuki Kagi
    Geochemical Laboratory, Graduate School of Science, The University of Tokyo

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Abstract

<jats:title>Abstract</jats:title> <jats:p>The dissolution rate and solubility of calcite, a polymorph of CaCO3, were determined in aspartic acid (Asp) solutions: Asp inhibited the surface reaction of calcite dissolution but accelerated the transport process. The crossover of these contrastive effects caused a local maximum of the dissolution rate constant and the transition of rate-determining processes. The calcite solubility increased with increasing Asp concentration, which may reflect its association with the change of the calcite surface structure derived from the addition of Asp.</jats:p>

Journal

  • Chemistry Letters

    Chemistry Letters 37 (5), 508-509, 2008-04-05

    Oxford University Press (OUP)

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