Adsorption ability for several harmful anions and thermal behavior of Zn-Fe layered double hydroxide

Tenihisa Hongo*, Takeshi Iemura, Atsushi Yamazaki

*この研究の対応する著者

研究成果: Article査読

37 被引用数 (Scopus)

抄録

A zinc-iron layered double hydroxide (Zn-Fe LDH) with sulfate as the interlayer ainon has been prepared by the coprecipitation method. The LDH was dehydrated in three steps below 300°C and transformed to the amorphous phase. The «crystallization from the amorphous phase to ZnO (zincite), ZnFe2O4 (spinel) and Zn3O (SO4) 2 occurred at approximately 450°C. Furthermore, Zn3O (SO 4) 2 decomposed into ZnO, SO2 and O2 above 700°C. The adsorption ability of the Zn-Fe LDH was studied for several harmful anions (phosphate, chromate, borate, fluoride, selenate and arsenate) in aqueous solution, and it showed high selectivity for phosphate, chromate and selenate ions. The Zn-Fe LDH was found to be stable over a wide pH range (pH = 2-12). The adsorption ability for phosphate ions depends on the initial pH and it increases with decreasing pH.

本文言語English
ページ(範囲)192-197
ページ数6
ジャーナルJournal of the Ceramic Society of Japan
116
1350
DOI
出版ステータスPublished - 2008 2

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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