Arsenate adsorption from water using a novel fabricated copper ferrite

Yao Jen Tu, Chen Feng You, Chien Kuei Chang, Shan Li Wang, Ting Shan Chan

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

A novel fabricated copper ferrite was investigated for its As(V) removal in this study. The adsorption of As(V) by this recycled copper ferrite exhibited an L-shaped nonlinear isotherm, suggesting limited binding sites on the adsorbent surface. The As K-edge XANES indicated that the adsorbed As(V) on copper ferrite was not reduced to more toxic As(III) by Fe2+ in the structure. The maximum As adsorption capacity of the copper ferrite was 45.66mgg-1 at pH 3.7 and decreased with pH due to enhanced electrostatic repulsion between As(V) and the adsorbent surface. Desorption of As(V) using six different acid and salt solutions revealed that the desorption rate decreased in the order of H3PO4>Na3PO4>H2SO4>Na2SO4>HCl>HNO3. These results suggest that the recycled copper ferrite without surface modification is an effective adsorbent for removing As(V) from water, confirmed by effective removal of As(V) from contaminated groundwater. Furthermore, the novel fabricated copper ferrite can be used to recover rapidly in 20s using a magnet. The information obtained in this work shows great potential for developing a cost-effective adsorbent for immobilization of arsenate using the recycled copper ferrite.

Original languageEnglish
Pages (from-to)440-448
Number of pages9
JournalChemical Engineering Journal
Volume198-199
DOIs
Publication statusPublished - 2012 Aug 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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