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ENHANCEMENT OF GASWORKS GROUNDWATER REMEDIATION BY COUPLING A BIO-ELECTROCHEMICAL AND ACTIVATED CARBON SYSTEM
Kirmizakis, P., R. Doherty, C.A. Mendonca, R. Costeira, C.C.R. Allen, et al.
Environmental Science and Pollution Research 26(10):9981-9991(2019)

A graphite-chambered bio-electrochemical system (BES) that utilizes granular activated carbon (GAC) as both sorption agent and high surface area anode was tested for its ability to remediate hydrocarbon-contaminated groundwater from a gasworks site in Northern Ireland. The BES chambers were effectively colonized by the bacterial communities from the contaminated groundwater. Principal coordinate analysis of UniFrac Observed Taxonomic Units (OTUs) showed distinct grouping of microbial types that are associated with the presence of GAC and grouping of microbial types associated with electroactivity. 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. https://link.springer.com/content/pdf/10.1007%2Fs11356-019-04297-w.pdf



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