Fe⁰/Zn⁰ PRB Technology for the Remediation of PCBs Contaminated Groundwater

Abstract:

The vast majority of PRB currently in use utilize zero valent iron (ZVI) as the reactive medium. In this paper, three laboratory columns were set up and operated under conditions simulating those anticipated in the groundwater to investigate the feasibility and efficiency of the enhanced Fe⁰ PRB for the remediation of the PCBs contaminated groundwater. Operating under 10°C and an effective porosity of 61% to 67% and infiltration velocity of groundwater of 0.7 to 0.8m•d-1, the average iron concentration of effluent was 0.241mg•L-1, 0.129mg•L-1 and 0.201mg•L-1, respectively, and the average dechlorination efficiency reached 49.6%, 72.6% and 58.6%, respectively, the Fe0/Zn0 based columns can accomplish 94% of PCBs removal and pH value raised from 6.87 to 10.2. Comprehensive consideration suggested that Fe0/Zn0 based PRB technology is feasible for the remediation of PCBs contaminated groundwater.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 1364-1367
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.1364
• Online since: February 2013
• Authors: Jun Du, Yuan Yuan Liu, Xue Qing Zhang, Ming Ying Qiu, Lan Ying Zhang, Ya Nan Fan
• Keywords: Groundwater Remediation, In Situ Treatment, Permeable Reactive Barrier, Polychlorinated Biphenyls, Zero Valent Iron

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