Reductive transformation of carbon tetrachloride by sulfide-treated goethite

Hongbo Shao, Elizabeth C. Butler

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

Abstract

In natural environments, many reductants contribute to the reductive transformation of chlorinated aliphatic hydrocarbons (CAHs). To effectively apply monitored natural attenuation in the remediation of CAH-contaminated aquifers, the identification of the predominant species that determine the reaction rate and the parameters that control the product distribution is needed. In this research, sulfide (S(-II))-treated goethite was used to simulate sulfate-reducing iron oxide-rich environments and the reductive dechlorination of carbon tetrachloride (CT) was studied. By changing pH and added Fe(II) and, by aging, the abundance of different reductants in S(-II)-treated goethite was changed in order to correlate the concentration of the different reductants with CT reduction rates. Experimental results indicated that weakly bound Fe(II) is the most reactive species in the electron transfer from surface to CT. Formate, CS2, CO and chloroform were identified as CT transformation products in S(-II)-treated goethite. A chlorine balance showed that the unidentified products were completely dechlorinated.

Original languageEnglish (US)
Title of host publicationAbstracts of Papers - 232nd American Chemical Society Meeting and Exposition
StatePublished - Dec 1 2006
Externally publishedYes
Event232nd American Chemical Society Meeting and Exposition - San Francisco, CA, United States
Duration: Sep 10 2006Sep 14 2006

Publication series

NameACS National Meeting Book of Abstracts
Volume232
ISSN (Print)0065-7727

Other

Other232nd American Chemical Society Meeting and Exposition
CountryUnited States
CitySan Francisco, CA
Period9/10/069/14/06

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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  • Cite this

    Shao, H., & Butler, E. C. (2006). Reductive transformation of carbon tetrachloride by sulfide-treated goethite. In Abstracts of Papers - 232nd American Chemical Society Meeting and Exposition (ACS National Meeting Book of Abstracts; Vol. 232).