Influence of Hydrology on Rainfall-Runoff Metal Element Speciation

Dean, Christopher; Sansalone, John J.; Cartledge, Frank K.; Pardue, John H.

doi:10.1061/(asce)0733-9372(2005)131:4(632)

Cited by 100 publications

(61 citation statements)

References 14 publications

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“…These saline waters may have facilitated the desorption of divalent metals from soils and sediment through cation exchange processes (Gambrell et al 1991) in turn resulting in a large mass loading of dissolved and particle-bound metals in the ensuing runoff. While metal concentrations in New Orleans floodwaters were consistent with previous investigations of stormwater runoff and Mississippi River water (Dean et al 2005;Meade 1995), a sustained concentration and heavy mass loading over days and weeks following the passage of the hurricanes could have led to an extended period of metal exposure to oysters. Furthermore, uptake of metals by oysters could have occurred by two mechanisms, uptake of dissolved metals through the gills and uptake of particulate-bound metals in the digestive tract.…”

Section: Discussionsupporting

confidence: 71%

“…Copper and zinc were found to exceed acute and chronic, fresh and saltwater aquatic life criteria, while other metals exceeded one or more criteria (EPA 2004). These authors compared their measured metal concentrations in the hurricane floodwater to pre-hurricane stormwater runoff (Dean et al 2005) and observed similar levels of Zn, Cd and Cu but elevated levels of Pb in floodwater with respect to runoff. In contrast, these authors observed surprisingly low levels of volatile organic compounds, notably refined petroleum, which they attributed to rapid evaporation, dilution, adsorption and degradation .…”

Section: Discussionmentioning

confidence: 75%

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Chemical contamination assessment of Gulf of Mexico oysters in response to hurricanes Katrina and Rita

Johnson

Kimbrough²,

Lauenstein

et al. 2008

Environ Monit Assess

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Hurricane Katrina made landfall on August 29, 2005 and caused widespread devastation along the central Gulf Coast states. Less than a month later Hurricane Rita followed a similar track slightly west of Katrina's. A coordinated multi-agency response followed to collect water, sediment and tissue samples for a variety of chemical, biological and toxicological indicators. The National Oceanic and Atmospheric Administration's National Status and Trends Program (NS&T) participated in this effort by measuring chemical contamination in sediment and oyster tissue as part of the Mussel Watch Program, a long-term monitoring program to assess spatial and temporal trends in a wide range of coastal pollutants. This paper describes results for contaminants measured in oyster tissue collected between September 29 and October 10, 2005 and discusses the results in the context of Mussel Watch and its 20-year record of chemical contamination in the region and the nation. In general, levels of metals in oyster tissue were higher then pre- hurricane levels while organic contaminants were at or near record lows. No contaminant reported here exceeded the FDA action level for food safety.

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Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 75%

Chemical contamination assessment of Gulf of Mexico oysters in response to hurricanes Katrina and Rita

Johnson

Kimbrough²,

Lauenstein

et al. 2008

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…The pH measured values were similar to those observed in other studies where acidic pH in PVC rainwater tanks has been reported (Simmons et al 2001;Coombes et al 2002). The acidic pH in tanks was probably due to acidic rain events, as this was not unusual for Melbourne (Siriwardene et al 2008) or in other places (Dean et al 2005;Sabina et al 2008 Table 2). This is because at higher pH (pH > 6), the fraction of dissolved Pb (Pb 2+ ions) decreases and particle bound Pb is predominant with the settlement of Pb particles enhanced.…”

supporting

confidence: 78%

Sediment Transport in Rainwater Tanks and Implications for Water Quality

Magyar¹,

Ladson²,

Diaper³

2011

Sediment Transport in Aquatic Environments

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“…Hydrologic and sampling statistics are summarized in Table 1. Site details, hydraulics, and chemistry are summarized elsewhere (Dean et al 2005;Sansalone and Ying 2008). The entire runoff volume from both catchments was treated for each event and sampled before and after the HS and BC.…”

Section: Urban-paved Watershed and Treatment Facilitymentioning

confidence: 99%

Representation of Particulate Matter COD in Rainfall Runoff from Paved Urban Watersheds

Kim

Sansalone

2009

Water Air Soil Pollut

Self Cite

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For a half century, total suspended solids (TSS) has been the most commonly utilized particulate matter (PM) gravimetric index for wastewater. While TSS has been extended to urban runoff, runoff phenomena are unique. Runoff is unsteady and transports heterodisperse inorganic granulometry, giving rise to the PM index, suspended sediment concentration (SSC). With respect to PM-associated chemical oxygen demand (COD p ) in runoff, it is hypothesized that, while the TSS method can represent effluent COD p , the SSC method is required to represent influent COD p . COD p and PM indices (TSS and SSC) for runoff events with mass balances and manual sampling are analyzed to investigate this hypothesis. This study examined a series of rainfall-runoff events captured from an instrumented fully paved urban catchment subject to traffic loadings in Baton Rouge, LA. Results indicate TSS generated substantial event-based mass balance errors for COD p and Δm p (mg/g) across a hydrodynamic separator (HS) as compared to SSC.TSS underestimates sediment-bound COD (>75 µm), a significant portion (maximum of 63% and median of 50%) of influent load. Negative bias by the TSS method for influent COD p load increases as the heterodisperse particle size distribution becomes coarser. Above a PM of 250 mg/L, underestimation of COD p by the TSS method is statistically significant. Utilizing the SSC method, COD p reduction by a HS upstream of a batch clarifier (BC) indicates that a HS does not provide COD p reduction, compared to a BC with 60 min of residence time. Representative PM and COD P assessment suggests frequent BMP and drainage system maintenance to ensure proper operation and reduce pollutant elution.

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Influence of Hydrology on Rainfall-Runoff Metal Element Speciation

Cited by 100 publications

References 14 publications

Chemical contamination assessment of Gulf of Mexico oysters in response to hurricanes Katrina and Rita

Chemical contamination assessment of Gulf of Mexico oysters in response to hurricanes Katrina and Rita

Sediment Transport in Rainwater Tanks and Implications for Water Quality

Representation of Particulate Matter COD in Rainfall Runoff from Paved Urban Watersheds

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