Assessing sediment recontamination from metals in stormwater
| Autor: | M.I. Rakowska, Megan Otto, Jared Ervin, Danny D. Reible, Brandon Steets, Balaji Rao, Nicholas T. Hayman, Robert Pitt, D. Bart Chadwick, John A. Dawson, Ilektra Drygiannaki, Gunther Rosen, Marienne A. Colvin |
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| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Watershed 010504 meteorology & atmospheric sciences Stormwater Sediment 010501 environmental sciences Contamination 01 natural sciences Pollution Deposition (geology) Dilution Settling Environmental chemistry Environmental Chemistry Environmental science Waste Management and Disposal Bay 0105 earth and related environmental sciences |
| Zdroj: | Science of The Total Environment. 737:139726 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2020.139726 |
| Popis: | Recontamination of sediments by stormwater is a major concern when evaluating the potential effectiveness of sediment remediation. Stormwater and sediment sampling were conducted in a mixed-use watershed at Paleta Creek in San Diego, CA to evaluate methods for assessing sediment recontamination by metals. Size-segregated stormwater contaminant loads with simultaneous receiving water and sediment measurements were used to identify dominant sources and contaminants with respect to their impact on sediment recontamination. Most of the stormwater contaminant loads of Cd, Cu, Pb, and Zn were associated with residential and highway sources from the upstream portions of the watershed and As, Ni and Hg were more significantly influenced by the downstream area of the watershed. Cd was strongly associated with large particles (>63 μm) and observed to settle in near shore areas with some attenuation due to mixing and dilution. Cu, in contrast, was associated more with the filtered fraction ( |
| Databáze: | OpenAIRE |
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