Occurrence and fate of corrosion-induced zinc in runoff water from external structures
2006 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 367, no 2-3, 908-923 p.Article in journal (Refereed) Published
This paper comprises data from an extensive cross-disciplinary research project aiming to elucidate the environmental fate of corrosion-induced zinc release from external structures. It includes an exposure assessment that provide long-term runoff rates, concentrations and chemical speciation of zinc, from 14 zinc-based materials exposed during 5 years in Stockholm, Sweden, and an effect assessment including bioavailability and ecotoxicity measurements, both at the immediate release situation and after soil interaction.Runoff rates of total zinc ranged from 0.07 to 2.5g Znm(-2) yr(-1) with zinc primarily released as the free ion for all materials investigated. The average effect concentration, causing a 50% growth reduction after 72h to the green algae Raphidocelis subcapitata, was at the immediate release situation 69 mu g ZnL-1. Upon interaction of runoff water with soil, which simulated 18 to 34years of exposure, the total zinc concentration was significantly reduced, from milligram per litre to microgram per litre levels. Simultaneously, the most bioavailable fraction of zinc in runoff, the hydrated zinc(II)-ion, decreased from more than 95% to about 30%. The major fraction, 98-99%, of the introduced total zinc concentration in the runoff water was retained within the soil. As long as the soil retention capacity was not reached, this resulted in zinc concentrations in the percolate water transported through the soil layer, close to background values and below growth inhibition concentrations for the green algae investigated. Zinc retained in soil was to a large extent (85-99.9%) extractable with EDTA, and available for plant uptake after 5 to 7months of ageing.
Place, publisher, year, edition, pages
2006. Vol. 367, no 2-3, 908-923 p.
Atmospheric corrosion, Metal retention, Risk assessment, Runoff rate, Soil, Speciation, Zinc, Atmospheric corrosion, Flow of water, Project management, Risk assessment, Runoff, Soils, Ecotoxicity, Metal retentions, Runoff rates, Speciation, Zinc, edetic acid, runoff, zinc, assessment method, bioavailability, corrosion, ecotoxicology, green alga, growth rate, inhibition, research work, runoff, soil, zinc, article, bioavailability, concentration (parameters), corrosion, ecotoxicity, environmental impact assessment, exposure variable, green alga, nonhuman, priority journal, reduction, soil, statistical analysis, water pollution, water pollution indicator, water transport, Algae, Green, Environmental Monitoring, Microscopy, Electron, Scanning, Models, Theoretical, Rain, Soil, Sweden, Water Movements, Water Pollutants, Chemical, Zinc
Other Environmental Engineering
IdentifiersURN: urn:nbn:se:kth:diva-5054DOI: 10.1016/j.scitotenv.2006.01.008ISI: 000240042700034ScopusID: 2-s2.0-33746706958OAI: oai:DiVA.org:kth-5054DiVA: diva2:7726
QC 20100901. Tidigare titel: Occurrence and environmental fate of corrosion-induced zinc in runoff water from external structures. Titel ändrad och uppdaterad från Submitted till Published 20100901.2005-04-252005-04-252010-09-01Bibliographically approved