Processes, Assessment and Remediation of Contaminated Sediments

doi:10.1007/978-1-4614-6726-7

Cited by 20 publications

(2 citation statements)

References 459 publications

(627 reference statements)

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“…By using standardized metrics intended specifically for ERA of sediments, ERAs could be both more accurate and the risk estimates easier to communicate between stakeholders. The US strategy argues that failing to define appropriate benchmarks for risk early in an assessment can obstruct the understanding between stakeholders (Lotufo et al 2014) and the communication between stakeholders is already reported to be difficult for sediment management in Sweden (L€ andell et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Risk assessments of contaminated sediments from the perspective of weight of evidence strategies – a Swedish case study

Bruce

Sobek

Ohlsson

et al. 2020

Human and Ecological Risk Assessment: An International Journal

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Several countries currently lack common recommendations specific to Ecological Risk Assessment (ERA) of contaminated sediments and stakeholders report inconsistencies between currently used approaches. The objective of this study was to provide an increased understanding of how ERAs of contaminated sediments are conducted in comparison to established guidelines. For this, we use Sweden as a case study and compare seven ERAs with four internationally established strategies. Our results indicate that contaminant concentrations receive a comparatively high weight, despite a lack of appropriate benchmarks; toxicity measurements are uncommon, while routine in established strategies; and the integration and interpretation of results lack transparency. We identify three areas that may help improve the practice of ERAs: a common approach to benchmarks, recommendations for how to assess toxic effects, and a common approach for integrating and interpreting results.

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Section: Discussionmentioning

confidence: 99%

Risk assessments of contaminated sediments from the perspective of weight of evidence strategies – a Swedish case study

Bruce

Sobek

Ohlsson

et al. 2020

Human and Ecological Risk Assessment: An International Journal

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“…Other studies indicate that groundwater travels in the order of cm per day [3]. Additionally, the targeted compounds are subjected to retardation processes due to the sorption onto the stationary soil particulates (reactive transport) that lead to further reduction by several orders of magnitude of the transport of substances in the shallow aquifer [33].…”

Section: Ground Water Contamination In the Canche Catchmentmentioning

confidence: 99%

Transfer Pathways and Fluxes of Water-Soluble Pesticides in Various Compartments of the Agricultural Catchment of the Canche River (Northern France)

Belles

Alary

Rivière

et al. 2019

Water

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Five frequently used water-soluble pesticides (atrazine, diflufenican, metolachlor, pendimethalin, and ethofumesate) were monitored in surface water and groundwater of an agricultural catchment (Canche River) in Northern France for examining the edge-of-field pathways of substances and their characteristic time of transport. The study of surface water contamination was conducted in 2016 through two time scales: continuously over one year at a single location of the catchment and punctually during four seasons at 15 sampling locations along a longitudinal river profile. In addition, groundwater in winter and summer shows a generally low and relatively constant contamination level. Nevertheless, the outflow of pesticides from groundwater results in a background contamination of surface water. In addition to this, a contamination peak above the baseline level is observed in surface water subsequently to the period of substance application on the fields. Our results show that pesticides were essentially transported into the surface water by fast flow components (runoff water). Loss of pesticides during the contamination peak period and long-term monitoring were compared showing that the transport of substances within weeks after pesticides spreading dominates the annual flux of pesticides, except for atrazine which shows a constant background contamination pattern. Low frequency monitoring schemes provide only a partial picture of the contamination state and do not enable to evaluate the true contamination state of such rivers with regard to the fact that 3/4 of the annual load of pesticides are transported in the stream during only 2–3 months.

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Assessing Biota Accumulation Due to Contamination of Sediments by Storm Water Heavy Metals

Drygiannaki

Bejar

Reible

et al. 2020

Enviro Toxic and Chemistry

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Evaluating sediment recontamination due to storm water discharges is important when evaluating the long-term effectiveness of sediment remediation efforts at reducing biological impacts. The bioaccumulation of the heavy metals zinc, nickel, copper, cadmium, mercury, and lead and the metalloid arsenic in a clam (Macoma nasuta) was studied in surficial sediments before and after storm water inputs from Paleta Creek, California, USA, during wet seasons in 2015 to 2016 and 2016 to 2017. The bioaccumulation was compared with bulk sediment concentrations and porewater concentrations measured by diffusion gradient in thin film devices. Significant reductions in biota accumulation and porewater concentrations were observed in samples collected after storm seasons compared with before storm seasons despite bulk sediment concentrations remaining the same or increasing. This was apparently the result of the deposition of storm water contaminants in low bioavailable forms. The bioaccumulation of all the measured contaminants showed a positive significant correlation with porewater concentrations (p < 0.1, α = 0.1) and weak or no correlations with bulk sediment concentration. In conclusion, observed bulk sediment recontamination due to storm water should not be assumed to lead directly to greater biota accumulation without bioavailability assessment.

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Processes, Assessment and Remediation of Contaminated Sediments

Cited by 20 publications

References 459 publications

Risk assessments of contaminated sediments from the perspective of weight of evidence strategies – a Swedish case study

Risk assessments of contaminated sediments from the perspective of weight of evidence strategies – a Swedish case study

Transfer Pathways and Fluxes of Water-Soluble Pesticides in Various Compartments of the Agricultural Catchment of the Canche River (Northern France)

Assessing Biota Accumulation Due to Contamination of Sediments by Storm Water Heavy Metals

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