Earth Science Frontiers ›› 2011, Vol. 18 ›› Issue (3): 331-338.

• Article • Previous Articles     Next Articles

The factors impacting on longterm performance of iron permeable reactive barriers for remediation of chlorinated hydrocarbons in groundwater: A review.

  

  1. 1. Research Institute of Safety and Environmental Technology， China National Petroleum Corporation， Beijing 100083， China
    2. Beijing Key Laboratory of Water Resources and Environmental Engineering， China University of Geosciences(Beijing)， Beijing 100083， China
    3. Downhole Operations Company, Dagang Oilfield Company, PetroChina, Tianjin 300283, China
  • Received:2010-06-12 Revised:2010-08-12 Online:2011-05-22 Published:2011-05-20

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Abstract:

Ironbased permeable reactive barriers (Fe0PRBs) for insitu groundwater remediation of chlorinated hydrocarbons such as perchloroethylene and trichloroethylene have become a mature technology. Results published recently focus on the evaluation of longterm performance of Fe0PRBs. This paper reviews the factors impacting on the longterm performance of Fe0PRBs in treating chlorinated solvents, including groundwater chemistry, mineral precipitates formed on iron surface, microbes within Fe0PRBs and other coexistent organic pollutants. It is mineral precipitates accumulating within Fe0PRBs that become the predominant factor to decrease barriers reactivity over time. Moreover, future research on multimedia permeable reactive barriers and sequential ones based on Fe0PRBs have been recommended.

Key words: granular iron, groundwater remediation, chlorinated hydrocarbon, permeable reactive barrier (PRB), longterm performance

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