Whole-lake nitrate addition for control of methylmercury in mercury-contaminated Onondaga Lake, NY

Matthews, David A.; Babcock, David B.; Nolan, John G.; Prestigiacomo, Anthony R.; Effler, Steven W.; Driscoll, Charles T.; Todorova, Svetoslava; Kuhr, Kenneth M.

doi:10.1016/j.envres.2013.03.011

Cited by 71 publications

(68 citation statements)

References 61 publications

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“…Bacteria mediated losses are likely operative, though not presently quantified. Secondly, the contemporary tributary contributions to the summertime TDP L to the upper waters (Figure 2) are overestimated because these do not accommodate the effects of plunging that prevails to varying extents for important tributaries [35][36][37].…”

Section: Water Quality Benefits Of a Deep Offshore Dischargementioning

confidence: 99%

“…TDP has two components, soluble reactive P (SRP) and dissolved organic P (DOP). The SRP fraction (15% of TDP in the Metro effluent) would be subject to multiple loss processes in such waters [33,34], particularly given the ongoing program of nitrate addition that blocks SRP release from the sediment [35]. Enzymatic losses of DOP are well known in productive (i.e., upper) layers [17,21].…”

Section: Water Quality Benefits Of a Deep Offshore Dischargementioning

confidence: 99%

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Evaluation of Offshore Wastewater Outfall and Diffuser for Onondaga Lake, NY

Owens¹,

Effler²,

Matthews³

et al. 2013

JWARP

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Outfall alternatives are evaluated for a municipal wastewater treatment facility that discharges effluent at the shoreline of an urban lake. Occurrence of plumes of poorly diluted effluent in adjoining portions of the lake is described. Alternatives considered include outfalls over a range of depth and various diffuser designs. Benefits and impacts on lake stratification and dissolved oxygen are evaluated for an array of design alternatives with a model which links a far field hydrothermal and transport submodel with a near field buoyant plume submodel. Outfall design features are described that: 1) reduce shoreline discharge of bypass flow of partially treated wastewater during major runoff events; 2) eliminate plumes of poorly diluted effluent; and 3) reduce loading of the effluent to the upper waters. A deep (10 to 14 m) outfall with a multiport diffuser would reduce the loading of the facility's effluent to the upper waters by approximately 40%, without noteworthy impact on stratification or dissolved oxygen.

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Section: Water Quality Benefits Of a Deep Offshore Dischargementioning

confidence: 99%

Section: Water Quality Benefits Of a Deep Offshore Dischargementioning

confidence: 99%

Evaluation of Offshore Wastewater Outfall and Diffuser for Onondaga Lake, NY

Owens¹,

Effler²,

Matthews³

et al. 2013

JWARP

Self Cite

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“…The presence of high nitrate in surface water acts against internal P loading (Matthews et al 2013;Parsons et al 2017). The reasons for this appear to be threefold.…”

Section: Nitrate Concentrations In Surface Watermentioning

confidence: 99%

Internal phosphorus loading in Canadian fresh waters: a critical review and data analysis

Orihel

Baulch

Casson

et al. 2017

Can. J. Fish. Aquat. Sci.

197

133

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Many physical, chemical, and biological processes in freshwater ecosystems mobilize the nutrient phosphorus (P) from sediments, which in turn may contribute to the formation of harmful algal blooms. Here, we critically reviewed internal P loading in Canadian fresh waters to understand the geographic patterns and environmental drivers of this important process. From 43 publications, we consolidated 618 estimates of internal P loading from Canadian freshwater ponds, lakes, reservoirs, and coastal wetlands (n = 70). Expressed in terms of total P, short-term gross rates in sediment samples (L gross ) ranged from −27 to 54 mg·m −2 ·day −1 (n = 461), while long-term net rates in whole ecosystems (L net ) ranged from −1694 to 10 640 mg·m −2 ·year −1 (n = 157). The main environmental drivers of this variation were oxygen, pH, geology, and trophic state. Internal P loading tended to be higher during the open-water season and most prominent in small prairie lakes. Priorities for future research on internal P loading should include resolving methodological problems, assessing the relative importance of different mechanisms, examining the influence of anthropogenic activities, and quantifying rates in understudied ecosystems. Résumé :De nombreux processus physiques, chimiques et biologiques dans les écosystèmes d'eau douce mobilisent le phosphore (P), un élément nutritif, des sédiments, ce qui peut favoriser la formation de fleurs d'eau néfastes. Nous avons effectué un examen critique de l'apport interne de P dans les plans d'eau douce canadiens afin de comprendre les motifs de répartition géographique et les facteurs environnementaux qui influent sur cet important processus. À la lumière de 43 publications, nous avons colligé 618 estimations de l'apport interne de P d'étangs, de lacs, de réservoirs et de milieux humides littoraux d'eau douce canadiens (n = 70). Exprimés en termes de P total, les taux d'apport de P à court terme pour les échantillons de sédiments (L gross ) vont de −27 à 54 mg·m -2 ·jour -1 (n = 461), alors que les taux nets à long terme à l'échelle de l'écosystème (L net ) vont de −1694 à 10 640 mg·m -2 ·an -1 (n = 157). Les principaux facteurs environnementaux influant sur ces variations sont l'oxygène, le pH, la géologie et l'état trophique. L'apport interne de P tend à être plus élevé durant la période d'eau libre et le plus marqué dans les petits lacs de prairie. La priorité des travaux futurs sur l'apport interne de P devrait porter sur la résolution de problèmes méthodologiques, l'évaluation de l'importance relative de différents mécanismes, l'examen de l'influence des activités humaines et la quantification des taux dans les écosystèmes sous-étudiés. [Traduit par la Rédaction]

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“…Bottom waters were maintained at a nitrate concentration of 2-4 mg-N/L and MeHg, which typically ranged from 2 to 6 ng/L in prior years, was negligible. The probable regulating mechanism was enhanced sorption of MeHg to Mn and Fe oxides in surfacial sediment (Matthews et al, 2013).…”

Section: Methylmercury In the Water Columnmentioning

confidence: 99%

“…Bottom water MeHg remained steady at 0.3 ng/L when nitrate was present, then rapidly increased to 1 ng/L once nitrate disappeared. Onondaga Lake (area = 12 km 2 ; maximum depth = 20 m), a Hgpolluted urban lake in New York, USA was the site of a novel nitrate addition pilot study in 2011 (Matthews et al, 2013). Eighty-four thousand kilograms of nitrate-nitrogen was added as liquid calcium nitrate to bottom waters from a barge during thermal stratification.…”

Section: Methylmercury In the Water Columnmentioning

confidence: 99%