Can or cannot green rust reduce chlorinated ethenes?

Marco C. Mangayayam, Knud Dideriksen, Dominique J. Tobler

Research output: Contribution to journalConference article in journalpeer-review

16 Citations (Scopus)

Abstract

Green rusts (GRs) are Fe2+ , Fe3+ layered double hydroxides that are widely investigated for the reduction of inorganic and organic pollutants in soils and groundwaters. Of particular interest is the use of GRs for the reduction of chlorinated ethenes, but existing literature shows contrasting results. Here, we tested 4 GRs (with different interlayer and hydroxide sheet modifications) in reactions with 3 different chlorinated ethenes (tetra-, tri-, and cis-dichloroethylene) for up to 10 months. Our results show that none of the freshly synthesized and untreated GRs can reduce the here tested chlorinated ethenes to any significant extent, corroborated by the lack of degradation products after 10 months and the absence of any significant volatilization. This is in stark contrast to previous literature, which reported that GR can degrade these chlorinated ethenes. The absence of reaction in our experiments is explained by having equilibrated GR suspensions, where the affinity of chlorinated ethenes for GR surfaces is extremely low.

Original languageEnglish
Pages (from-to)173-178
Number of pages6
JournalEnergy Procedia
Volume146
DOIs
Publication statusPublished - Jul 2018
Externally publishedYes
Event2018 International Carbon Conference - Reykjavik, Iceland
Duration: 10 Sept 201814 Sept 2018

Keywords

  • chlorianted solvents
  • green rust
  • remediation

Programme Area

  • Programme Area 2: Water Resources

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