Speciation of Zinc and Copper in Stormwater Pavement Runoff from Airside and Landside Aviation Land Uses |
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| Authors: | I Gnecco J J Sansalone L G Lanza |
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| Institution: | 1. Department of Civil, Environmental and Architectural Engineering, University of Genoa, Via Montallegro 1, 16145, Genova, Italy
2. Environmental Engineering Sciences, University of Florida, Gainesville, FL, USA
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| Abstract: | The transport, bioavailability and fate of aqueous metals in rainfall-runoff are determined, in part, by speciation. In the framework of a monitoring program to investigate the predominant species of zinc, copper, and water chemistry in runoff subject to aviation land use and activities, two rainfall-runoff monitoring stations were installed at the international airport of Genoa (Italy). One catchment was a boarding area (airside) apron and the other a parking area for vehicles (landside). Utilizing water chemistry analyses, ion balances and speciation modelling for a series of five event loadings for each site, results indicated that Zn2+ dominated Zn speciation and Cu complexes with carbonate or dissolved organic matter, dominated Cu speciation. With respect to wash-off processes a mass limited behaviour was generally observed for particulate matter (measured as TSS) and TOC; while the mass delivery of aqueous metal species tended to be more proportionate with respect to runoff volume. |
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