Rapid synthesis of LDHs using dolomite as a magnesium source and application to borate removal

Xinhong Qiu, Mari Yoshida, Tsuyoshi Hirajima, Keiko Sasaki

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A rapid and efficient method based on microwave-assisted treatment has been developed for preparing layered double hydroxides (LDHs) using natural dolomite as a magnesium source. The aging temperature was 120°C and the total synthetic time was only within 6 h. The product was fully characterized by elemental composition, powdery X-ray diffraction, and scanning electron microscopy, to be highly pure hydrotalcite with a flaky shape. The synthesized adsorbent exhibited the sorption capacity of 1.34 mmol/kg which is comparable to boron-specific resin. Based on 11B MAS NMR and XRD results, the principal mechanism for borate immobilization on the LDHs is ion-exchange followed by transformation of polyborate into monoborate in a process of drying.

Original languageEnglish
Pages (from-to)224-228
Number of pages5
JournalMaterials Transactions
Volume56
Issue number2
DOIs
Publication statusPublished - 2015

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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