Experimental and biogeochemical modeling studies on arsenic release in soil under anaerobic condition

Abdul Halim, Kenji Jinno, Abdur Razzak, Keita Oda, Yoshinari Hiroshiro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The identification of release mechanisms of arsenic may assist in designing safe and effective remediation strategies, due to its severe toxicity effect for the human body. In this regards, investigations were carried out to observe the release of As from soil into water. It was found that As concentration increased with decreasing oxidation reduction potential. Arsenic concentrations demonstrated negative covariation with the concentrations of NO3 but strongly correlated with DOC and Fe concentrations. Batch leaching tests at different pH conditions showed a strong pH dependence on arsenic and iron leaching. A numerical simulation of arsenic transport model, coupled with microbially mediated biogeochemical processes was developed for describing the release of As in soil under reducing environment. The simulation concentrations of Mn, Fe and As were well matched those found experimentally. The results of this study suggested that the microbially mediated degradation of organic matter and reductive dissolution of Fe-oxyhydroxide are considered to be the dominant processes to release As in aquifers.

Original languageEnglish
Title of host publicationAssociation for Environmental Health and Sciences - 23rd Annual International Conference on Soils, Sediments and Water 2007
Pages224-239
Number of pages16
Volume13
Publication statusPublished - 2007
Event23rd Annual International Conference on Soils Sediments and Water 2007 - Amherst, MA, United States
Duration: Oct 15 2007Oct 18 2007

Other

Other23rd Annual International Conference on Soils Sediments and Water 2007
CountryUnited States
CityAmherst, MA
Period10/15/0710/18/07

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Environmental Science (miscellaneous)
  • Pollution
  • Water Science and Technology

Fingerprint Dive into the research topics of 'Experimental and biogeochemical modeling studies on arsenic release in soil under anaerobic condition'. Together they form a unique fingerprint.

  • Cite this

    Halim, A., Jinno, K., Razzak, A., Oda, K., & Hiroshiro, Y. (2007). Experimental and biogeochemical modeling studies on arsenic release in soil under anaerobic condition. In Association for Environmental Health and Sciences - 23rd Annual International Conference on Soils, Sediments and Water 2007 (Vol. 13, pp. 224-239)