Degradation of chlorinated organic compounds by mixed particles of iron/iron sulfide or iron/iron disulfide

Masahiro Shiba, Md Azhar Uddin, Yoshiei Kato, Tomoshige Ono

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Kinetic study was carried out in order to clear a mixing effect of Fe-Fe-S or Fe-Fe-S2 particles on increase in degradation rate of chlorinated organic compounds. Trichloroethylene (TCE) contained solution was used for dechlorination in 30mL of vial bottle and mixed by rotary device. Estimating that TCE concentration in solution was proportional to TCE gas concentration in head space of vial bottle, gas was obtained from the head space with syringe and measured by GC-FID. TCE degradation occurred on Fe, Fe-S, Fe-Fe-S and Fe-Fe-S2 particles except Fe-S2. TCE degradation of mixed particles of Fe-Fe-S or Fe-Fe-S2 was explained by anode (Fe)cathode (Fe-S or Fe-S2) reaction. TCE degradation rates of Fe-Fe-S and Fe-Fe-S2 caused by anode/cathode reaction were 2.81 x 10-6 and 1.37 x 10-5 (m/h), respectively, which were larger than those of pure Fe and Fe-S. There was no difference in TCE degradation rate of mixed particles of Fe-Fe-S or Fe-Fe-S2 between aerobic and anaerobic solutions. TCE degradation rate of mixed particles of Fe-Fe-S or Fe-Fe-S 2 increased in decrease in size of Fe-S or Fe-S2. TCE degradation rate of mixed particles of Fe-Fe-S or Fe-Fe-S2 increased with increase in decomposition temperature.

Original languageEnglish
Pages (from-to)708-712
Number of pages5
JournalMaterials Transactions
Volume55
Issue number4
DOIs
Publication statusPublished - 2014

Keywords

  • Anode
  • Cathode
  • Chlorinated organic compounds
  • Contaminated soil
  • Dechlorination
  • Groundwater
  • Iron
  • Iron disulfide
  • Iron sulfide
  • Trichloroethylene
  • Volatile organic compounds
  • Zero-valent iron

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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