Influence of redox potential on arsenic release from soil in the presence of iron oxyhydroxide

Kim Phuong Nguyen, Ryuichi Itoi, Rie Yamashiro

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This paper presents the effects redox potential on the mobility of arsenic (As) from soil in the presence of iron oxyhydroxide with soil column experiment. The mineralogical characteristics of the soil were identified by acid digestion, X-ray diffraction and sequential extraction methods. Approximately 60% of the total arsenic was associated with iron oxyhydroxides and iron oxides. Redox potential played a significant role on the onset of arsenic and iron release from the soil. The arsenic and iron concentration of the effluent from the soil column suggested that the release of arsenic was related to reductive dissolution of Fe-oxyhydroxides. Results of soil column experiment also imply that arsenic remains being adsorbed to iron oxyhydroxide until its surface area becomes small because of transformation into more stabilized form.

Original languageEnglish
Pages (from-to)129-140
Number of pages12
JournalMemoirs of the Faculty of Engineering, Kyushu University
Volume68
Issue number2
Publication statusPublished - Jun 2008

All Science Journal Classification (ASJC) codes

  • Energy(all)
  • Atmospheric Science
  • Earth and Planetary Sciences(all)
  • Management of Technology and Innovation

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