PERFORMANCE ASSESSMENT OF STORMINATOR™ BARREL: A DISSOLVED METAL TREATMENT SYSTEM

F.J. Charters, A. Clarkson, M. Millar, C. Moss, T.A. Cochrane & A.D. O’Sullivan (University of Canterbury)

ABSTRACT

Dissolved metals from roof runoff are increasingly recognized as a key source of ecotoxic metals into our urban waterways (Chakravarthy et al., 2019; Charters et al., 2016; Müller et al., 2019). Previous studies of untreated roof runoff quality indicate typical zinc concentrations from zinc-based roofs of >1,000 µg/L (and up to 56,000 ug/L) and copper concentrations from copper roofs of >1,000 µg/L (and up to 9,000 ug/L), with 80-100% in dissolved form (Charters et al., 2021). Stormwater, including roof runoff, is often untreated prior to discharge in the receiving waterway, and where it is treated, the treatment system typically targets sediment and associated particulate metal removal, with dissolved metals passing through largely unmodified (Clark & Pitt, 2012; Kaya et al., 2022).

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