title: Build-up of toxic metals on the impervious surfaces of a commercial seaport.
abstract: In the context of increasing threats to the sensitive marine ecosystem by toxic metals, this study investigated the metal build-up on impervious surfaces specific to commercial seaports. The knowledge generated from this study will contribute to managing toxic metal pollution of the marine ecosystem. The study found that inter-modal operations and main access roadway had the highest loads followed by container storage and vehicle marshalling sites, while the quay line and short term storage areas had the lowest. Additionally, it was found that Cr, Al, Pb, Cu and Zn were predominantly attached to solids, while significant amount of Cu, Pb and Zn were found as nutrient complexes. As such, treatment options based on solids retention can be effective for some metal species, while ineffective for other species. Furthermore, Cu and Zn are more likely to become bioavailable in seawater due to their strong association with nutrients. Mathematical models to replicate the metal build-up process were also developed using experimental design approach and partial least squares regression. The models for Cr and Pb were found to be reliable, while those for Al, Zn and Cu were relatively less reliable, but could be employed for preliminary investigations.
authors: Science and Engineering Faculty, Queensland University of Technology (QUT), GPO Box 2434, Brisbane, QLD 4001, Australia. Electronic address: mohamed.ziyath@qut.edu.au.
authors: Abdul M
authors: AM
authors: Ziyath
authors: Science and Engineering Faculty, Queensland University of Technology (QUT), GPO Box 2434, Brisbane, QLD 4001, Australia. Electronic address: p.egodawatta@qut.edu.au.
authors: Prasanna
authors: P
authors: Egodawatta
authors: Science and Engineering Faculty, Queensland University of Technology (QUT), GPO Box 2434, Brisbane, QLD 4001, Australia. Electronic address: a.goonetilleke@qut.edu.au.
authors: Ashantha
authors: A
authors: Goonetilleke
mesh_terms: D001315:Australia; D004784:Environmental Monitoring / Q000379:methods; D000075322:Heavy Metal Poisoning; D019216:Metals, Heavy / Q000032:analysis*; D008962:Models, Theoretical; D011041:Poisoning; D011891:Rain; D012623:Seawater / Q000737:chemistry*; D014186:Transportation; D014874:Water Pollutants, Chemical / Q000032:analysis*; D060753:Water Quality / Q000592:standards*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Experimental design; Marine ecosystem; Stormwater pollutant processes; Stormwater quality; Water quality modelling