INFLUENCE OF GLUCURONIC ACID AND GALACTURONIC ACID ON THE PRECIPITATION RATE AND POLYMORPHISM OF CALCIUM CARBONATE MINERALS IN SOLUTIONS WITH Mg²⁺ IONS

• Kawano Motoharu

  Graduate School of Science and Engineering, Kagoshima University

• Miyashita Mako

  Department of Earth and Environmental Science, Faculty of Science, Kagoshima University

書誌事項

タイトル別名

• INFLUENCE OF GLUCURONIC ACID AND GALACTURONIC ACID ON THE PRECIPITATION RATE AND POLYMORPHISM OF CALCIUM CARBONATE MINERALS IN SOLUTIONS WITH Mg²⁺ IONS

抄録

Uronic acids are common organic molecules that are released from microbes and plants in the earth’s surface environments. To evaluate the effect of uronic acids on the precipitation rate and polymorphism of calcium carbonate (CaCO₃) minerals, precipitation experiments of CaCO₃ minerals were performed in systems containing glucuronic acid and galacturonic acid using the batch method with a 100 mL solution at 25°C. Each solution contained 5.0 mM Ca²⁺ and Mg²⁺, and 20.0 mM HCO₃⁻ ions with 0.00, 0.01, 0.05, 0.1, 0.5, and 1.0 mM of glucuronic acid or galacturonic acid. Additionally, the adsorption experiments with these uronic acids were performed on the surface of calcite and aragonite to confirm their adsorption affinity for the surfaces of CaCO₃ minerals. The results showed that both uronic acids inhibited the precipitation of CaCO₃ minerals with increasing the concentrations. The inhibition effect of galacturonic acid was much greater than that of glucuronic acid. In addition, only aragonite was formed as a stable polymorph in solutions containing no uronic acid due to the effect of Mg²⁺ ions. However, galacturonic acid inhibited the formation of aragonite and enhanced the formation of calcite as a stable polymorph of CaCO₃ minerals, whereas glucuronic acid showed no significant effect on the polymorphism at concentrations below 1.0 mM. These adsorption experiments revealed that galacturonic acid exhibited much greater adsorption on both surfaces of aragonite and calcite compared to glucuronic acid. Consequently, the extent of the effect on the precipitation rate and polymorphism is consistent with the adsorption affinity of uronic acids for the surfaces of CaCO₃ minerals.

収録刊行物

• Ｃｌａｙ　Ｓｃｉｅｎｃｅ

  Ｃｌａｙ　Ｓｃｉｅｎｃｅ 22 (1), 19-27, 2018-03-31

  一般社団法人 日本粘土学会

キーワード

• uronic acids
• precipitation rate
• polymorphism
• calcium carbonate
• glucuronic acid
• galacturonic acid

詳細情報

• CRID: 1390282763014347264
• NII論文ID: 130007384632
• NII書誌ID: AA00607148
• DOI: 10.11362/jcssjclayscience.22.1_19
• ISSN: 21863555
• ISSN: 00098574
• NDL書誌ID: 029061698
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029061698
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • Crossref
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