Preparation of Mg-Al layered double hydroxide doped with Fe2+ and its application to Cr(VI) removal

研究成果: Article査読

47 被引用数 (Scopus)

抄録

Mg-Al layered double hydroxide (Mg-Al LDH) doped with Fe2+ was prepared by dropwise addition of a mixed solution of MgCl2, FeCl 2, and AlCl3 to NaOH solution at a constant pH. The Fe2+-doped LDH was found to be able to remove Cr(VI) from an aqueous solution through the anion exchange of Cr2O72- with the intercalated Cl-, the production of Cr(OH)3, and the adsorption of Cr2O72- on the surface of the produced FeO(OH). The excellent performance of this LDH for Cr(VI) removal is caused by both the anion exchange properties of Mg-Al LDH and the reducing activity of the Fe2+ doped into the Mg-Al LDH. This process can be considered to occur through Langmuir-type adsorption, and the maximum adsorption amount and equilibrium adsorption constant are 12.5 mmol g-1 and 242.1, respectively.

本文言語English
ページ(範囲)12-16
ページ数5
ジャーナルSeparation and Purification Technology
122
DOI
出版ステータスPublished - 2014

ASJC Scopus subject areas

  • 分析化学
  • ろ過および分離

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