Degradation of Asbestos by Hydrofluoric Acid

DOI Web Site 11 References

Bibliographic Information

Other Title
  • フッ化水素酸によるアスベストの化学的分解
  • フッカ スイソサン ニ ヨル アスベスト ノ カガクテキ ブンカイ

Search this article

Abstract

Asbestos fiber crystals were efficiently degraded by hydrofluoric acid, but not hydrochloric acid, sulfuric acid and nitric acid. Asbestos fiber crystals were completely degraded by 15% hydrofluoric acid within 2 hours at room temperature. The results of TEM micrographs, corresponding selected area diffraction patterns (SADP) and X-ray diffraction measurements obviously demonstrated that asbestos fiber crystals were reacted with hydrofluoric acid to generate magnesium fluoride and magnesium hexafluorosilicate. A high concentration of hydrofluoric acid remained in a wastewater after treatment of asbestos with 15% hydrofluoric acid for 2 hours was properly processed. After having processed the wastewater, the concentration of fluorine ion was 1.8 mg/l. These results suggest that the method consisting of a degradation of asbestos with hydrofluoric acid and a subsequent processing of wastewater may be useful for removing resolution of asbestos.

Journal

  • Eco-Engineering

    Eco-Engineering 20 (2), 79-84, 2008

    The Society of Eco-Engineering

References(11)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top