Formation of Mg-Al layered double hydroxide modified by organic acid anions and its application to wastewater treatment

Tomohito Kameda, Masami Saito, Shingo Saito, Yoshiaki Umetsu

Research output: Contribution to conferencePaperpeer-review

Abstract

Development of scavengers to remove heavy metal ions and organic pollutants from wastewaters has been attempted by coupling Mg-Al layered double hydroxide (Mg-Al LDH) with organic acid anions having functional groups in their structure, such as edta and 2,6-naphthalene-di-sulfonate ion (2,6-NDS 2-). These organic-modified Mg-Al LDHs were synthesized by adding a solution of magnesium and aluminum nitrates to alkaline solution containing the organic acid anion. The solid product was confirmed to be Mg-Al LDH with Al/(Mg+Al) mole ratio of about 0.25 and to have intercalated organic acid anions in the inter-layers. The edta-intercalated Mg-Al LDH was found to remove rapidly Cd2+ from an aqueous solution. The 2,6-NDS-intercalated Mg-Al LDH could uptake organic pollutant exampled by bisphenol A. This organic sulfonate-modified Mg-Al LDH was regenerated by extraction of the uptaken bisphenol A with ethanol, and confirmed to have a high potentiality for the repeated use.

Original languageEnglish
Pages5-12
Number of pages8
Publication statusPublished - 2005
Event2005 TMS Annual Meeting - San Francisco, CA, United States
Duration: 2005 Feb 132005 Feb 17

Other

Other2005 TMS Annual Meeting
CountryUnited States
CitySan Francisco, CA
Period05/2/1305/2/17

Keywords

  • Heavy metal ion
  • Mg-Al layered double hydroxide
  • Modify
  • Organic acid anions
  • Organic pollutant
  • Uptake

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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