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Panagiotis, K., R. Doherty, C.A. Mendonca, R. Costeira, C.C.R. Allen, U.S. Ofterdinger, et. al.
Environmental Science and Pollution Research [Publication online 9 Feb 2019 prior to print]

The study shows the electrical response, bacterial community, and remediation of hydrocarbon-contaminated groundwater from a gasworks site using a graphite-chambered bio-electrochemical system (BES) that utilized granular activated carbon (GAC) as both sorption agent and high surface area anode. The BES chambers were effectively colonized by the bacterial communities from the contaminated groundwater. Principal coordinate analysis of UniFrac Observed Taxonomic Units showed distinct grouping of microbial types associated with the presence of GAC and grouping of microbial types associated with electroactivity. Bacterial community analysis showed that beta-proteobacteria (particularly the PAH-degrading Pseudomonadaceae) dominated all the samples. Rhodocyclaceae- and Comamonadaceae-related OTU were observed to increase in BES cells. The GAC BES (99% removal) outperformed the control graphite GAC chamber, as well as a graphite BES and a control chamber both filled with glass beads. This article is Open Access at https://link.springer.com/content/pdf/10.1007%2Fs11356-019-04297-w.pdf

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