Toxicity risk assessment of mercury, DDT and arsenic legacy pollution in sediments: A triad approach under low concentration conditions

Marziali, Laura; Rosignoli, Federica; Drago, A.; Pascariello, Simona; Valsecchi, Lucia; Rossaro, Bruno; Guzzella, Licia

doi:10.1016/j.scitotenv.2017.03.219

Cited by 35 publications

(36 citation statements)

References 45 publications

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“…Moreover, in aquatic sediments and in particular in lakes, sulphides and organic matter, as well as iron and manganese oxy-hydroxides, play a fundamental role as ligands of micropollutants [51], governing their bioavailability. Besides, local chemical and physical conditions hampers bioavailability predictability and thus assessment of sediment toxicity [52]. …”

Section: Contamination Of Reservoir Sediments and Toxicity Riskmentioning

confidence: 99%

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Marziali¹,

Tartari²,

Salerno³

et al. 2017

Preprint

Self Cite

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Abstract:Reservoirs are characterized by accumulation of sediments where micropollutants may concentrate, with potential toxic effects on downstream river ecosystems. However, sediment management such as flushing is needed to maintain storage capacity. Climate change is expected to increase sediment loads, but potential effects on their quality are scarcely known. In this context, sediment contamination by trace elements (As, Cd, Cr, Cu, Hg, Ni, Pb, Zn) and organics (PAHs, PCBs, C>12) was analyzed in 20 reservoirs located in Italian Central Alps. A strong As and a moderate Cd, Hg and Pb enrichment was emphasized by Igeo, with potential ecotoxicological risk according to PEC quotients. Sedimentation rate, granulometry, total organic carbon (TOC) and altitude resulted as the main drivers governing pollutant concentrations in sediments. According to climate change models, expected increase of rainfall erosivity will enhance soil erosion and consequently the sediment flow to reservoirs, potentially increasing coarse grain fractions and thus potentially diluting pollutants. Conversely, increased weathering may enhance metal fluxes to reservoirs. Increased vegetation cover will potentially result in higher TOC concentrations, which may contrast contaminant bioavailability and thus toxicity. Our results may provide elements for a proper management of contaminated sediments in a climate change scenario aiming at preserving water quality and ecosystem functioning.

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Section: Contamination Of Reservoir Sediments and Toxicity Riskmentioning

confidence: 99%

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Marziali¹,

Tartari²,

Salerno³

et al. 2017

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, in aquatic sediments and in particular in lakes, sulfides and organic matter, as well as iron and manganese oxy-hydroxides, play a fundamental role as ligands of micropollutants [51], governing their bioavailability. Besides, local chemical and physical conditions hampers bioavailability predictability and thus assessment of sediment toxicity [52]. Table 2.…”

Section: Contamination Of Reservoir Sediments and Toxicity Riskmentioning

confidence: 99%

“…The protocol includes standard methods for sampling, chemical analysis, ecotoxicological and ecological characterization of sediments of the reservoirs and of the downstream river stretches. It also includes criteria for risk assessment using an approach similar to TRIAD (e.g., [52]), which takes into account: (1) the comparison of micropollutant concentrations in sediments with ecotoxicological thresholds selected from existing national legislation or from literature (e.g., PECs [41]); (2) the assessment of sediment toxicity using ecotoxicological test batteries (comprising tests both on whole-sediments and leachates); and (3) the assessment of aquatic communities in the downstream river stretches according to official monitoring protocols. Results of chemical, ecotoxicological and ecological assessment before flushing is considered as basis for planning proper operations, and after flushing as criteria to evaluate the results of the operations by comparison with the previous conditions.…”

Section: Management Directionsmentioning

confidence: 99%

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Marziali

Tartari

Salerno

et al. 2017

Water

View full text Add to dashboard Cite

Abstract:Reservoirs are characterized by accumulation of sediments where micropollutants may concentrate, with potential toxic effects on downstream river ecosystems. However, sediment management such as flushing is needed to maintain storage capacity. Climate change is expected to increase sediment loads, but potential effects on their quality are scarcely known. In this context, sediment contamination by trace elements (As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn) and organics (Polycyclic Aromatic Hydrocarbons PAHs, Polychlorinated Biphenyls PCBs and C > 12 hydrocarbons) was analyzed in 20 reservoirs located in Italian Central Alps. A strong As and a moderate Cd, Hg and Pb enrichment was emphasized by I geo , with potential ecotoxicological risk according to Probable Effect Concentration quotients. Sedimentation rate, granulometry, total organic carbon (TOC) and altitude resulted as the main drivers governing pollutant concentrations in sediments. According to climate change models, expected increase of rainfall erosivity will enhance soil erosion and consequently the sediment flow to reservoirs, potentially increasing coarse grain fractions and thus potentially diluting pollutants. Conversely, increased weathering may enhance metal fluxes to reservoirs. Increased vegetation cover will potentially result in higher TOC concentrations, which may contrast contaminant bioavailability and thus toxicity. Our results may provide elements for a proper management of contaminated sediments in a climate change scenario aiming at preserving water quality and ecosystem functioning.

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“…Consequently, it may become concentrated to values higher than the limits allowable for drinking waters and for terrestrial/aquatic food for human consumption (Garelick et al 2009). Additionally, negative effects (i.e., low growth, low development rate) on aquatic organisms and on the structure of benthic communities have been related to As in sediments, even at concentrations of 20 mg/kg (Luo et al 2010, Marziali et al 2017.…”

Section: Introductionmentioning

confidence: 99%

Arsenic Content, Grain Sizes and Chemical Characteristics in Surface Sediments of the Urías Lagoon, Nw Mexico

Rendón-Martínez

Frías-Espericueta

Green-Ruíz

et al. 2019

Rev. Int. Contam. Ambie.

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Aiming to detect possible impacts of human activities on the characteristics of the sediments of the Urías lagoon, which is a lagoonal system surrounded by the urban area of Mazatlán (NW Mexico), we determined the mean percentages of the main particle fractions, pH, CO3 2-, organic carbon and total arsenic content in the surficial sediments of six different zones of the Urías lagoon. Sand was the dominant size fraction throughout the whole system. The highest organic matter and the lowest pH values were found in adjacent sites to industrial activities, especially to fish processing. Most arsenic concentrations were within the values of the natural local background (12.6-27.3 mg/kg), with the possible exception of sediments close to the industrial area, especially those nearby the fish processing plants, where the mean As (45.2 ± 9.3 mg/kg) exceeded the level which may have adverse effects on marine organisms (41.6 mg/kg). However, it is not excluded that such levels are results rather from the combined effect of the hydrodynamic and sediments dynamic of sediment associated to local enrichments background of the region. Palabras clave: lagunas costeras, sedimentos, elementos traza, Golfo de California RESUMEN La laguna costera Urías se encuentra rodeada por la zona urbana de Mazatlán (noroeste de México). Con la finalidad de detectar posibles impactos de actividades humanas sobre las características de los sedimentos, se determinaron los porcentajes de las fracciones particuladas, pH, CO3 2-, carbono orgánico y arsénico total en los sedimentos Short communication / Comunicación breve

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Toxicity risk assessment of mercury, DDT and arsenic legacy pollution in sediments: A triad approach under low concentration conditions

Cited by 35 publications

References 45 publications

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Arsenic Content, Grain Sizes and Chemical Characteristics in Surface Sediments of the Urías Lagoon, Nw Mexico

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