title: A permeable reactive barrier (PRB) media sequence for the remediation of heavy metal and hydrocarbon contaminated water: A field assessment at Casey Station, Antarctica.
abstract: A field trial was conducted at Casey Station, Antarctica to assess the suitability of a permeable reactive barrier (PRB) media sequence for the remediation of sites containing both hydrocarbon and heavy metal contamination. An existing PRB was modified to assess a sequence consisting of three sections: (i) Nutrient release/hydrocarbon sorption using ZeoPro™ and granular activated carbon; (ii) Phosphorus and heavy metal capture by granular iron and sand; (iii) Nutrient and excess iron capture by zeolite. The media sequence achieved a greater phosphorus removal capacity than previous Antarctic PRB configurations installed on site. Phosphorus concentrations were reduced during flow through the iron/sand section and iron concentrations were reduced within the zeolite section. However, non-ideal flow was detected during a tracer test and supported by analysis of media and liquid samples from the second summer of operation. Results indicate that the PRB media sequence trialled might be appropriate for other locations, especially less environmentally challenging contaminated sites.
authors.affiliation: Particulate Fluids Processing Centre, Department of Chemical and Biomolecular Engineering, University of Melbourne, VIC 3010, Australia; JBS&G, 43 Stubbs Street, Kensington, VIC 3031, Australia.
authors.forename: Tom M
authors.initials: TM
authors.lastname: Statham
authors.affiliation: Australian Antarctic Division, Department of the Environment, 203 Channel Highway, Kingston, TAS 7050, Australia.
authors.forename: Scott C
authors.initials: SC
authors.lastname: Stark
authors.affiliation: Australian Antarctic Division, Department of the Environment, 203 Channel Highway, Kingston, TAS 7050, Australia.
authors.forename: Ian
authors.initials: I
authors.lastname: Snape
authors.affiliation: Particulate Fluids Processing Centre, Department of Chemical and Biomolecular Engineering, University of Melbourne, VIC 3010, Australia.
authors.forename: Geoffrey W
authors.initials: GW
authors.lastname: Stevens
authors.affiliation: Particulate Fluids Processing Centre, Department of Chemical and Biomolecular Engineering, University of Melbourne, VIC 3010, Australia. Electronic address: mumfordk@unimelb.edu.au.
authors.forename: Kathryn A
authors.initials: KA
authors.lastname: Mumford
mesh_terms: D000864:Antarctic Regions; D002606:Charcoal / Q000737:chemistry*; D006838:Hydrocarbons / Q000737:chemistry*; D019216:Metals, Heavy / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D002606:Charcoal; D006838:Hydrocarbons; D019216:Metals, Heavy; D062065:Wastewater; D014874:Water Pollutants, Chemical; D017641:Zeolites
keywords: Groundwater remediation; PRB; ZeoPro; Zeolite; Zero-valent iron