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Zhang, X., Y. Wu, P. Zhao, X. Shu, Q. Zhou, and Z. Dong.
Water 10(1):13(2018)

In a study of enhanced micro-electrolysis for chlorobenzene (CB)-contaminated groundwater remediation, scientists attempted to couple iron-copper bimetal with biochar. Within two series of columns filled with sands of different grain diameters, permeable reactive barriers (PRBs) consisting of iron, copper, and biochar particles were installed to simulate remediation of CB-contaminated groundwater in homogeneous and heterogeneous aquifers. Regardless of the heterogeneity of the porous media, CB concentrations in the effluent from the PRB columns were significantly lower than the natural sandy (control) columns. CB was transported relatively quickly in the heterogeneous porous media, and the average effluent CB concentrations from the heterogeneous porous media were lower than those from homogeneous porous media. Heterogeneity retarded the vertical infiltration of CB, leading to its extended lateral distribution. During the treatment process, benzene and phenol were observed as the products of CB degradation. The two iron, copper, and biochar simulated PRB systems achieved ultimate CB removal efficiency of 61.4% and 68.1%. http://www.mdpi.com/2073-4441/10/1/13/pdf

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