Effects of a physico-chemical treatment of a dredged sediment on its ecotoxicity after discharge in laboratory gravel pit microcosms

Clément, Bernard; Vaille, Gilles; Moretto, Robert; Vernus, Emmanuel; Abdelghafour, Mohammed

doi:10.1016/j.jhazmat.2009.09.150

Cited by 8 publications

(3 citation statements)

References 33 publications

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“…Most notably, extremely high levels of OCPs have been reported in sediments surrounding industrial units that synthesize these chemicals, such as Ya-Er lake area in Hubei, central China, Lake Ørsjøen, Southern Norway: McGrath Lake, USA (Brevik et al 1996;Wu et al 1997;Anderson et al 2013). In most cases, sediment remediation projects have been carried out, and one of the most frequent remediation solutions adopted for those heavily polluted sediments is "dig and dump" , involving disposal of the dredged sediments in a con ned disposal facility or on low-lying areas (Clément et al 2010;Gomes 2013;Liu et al 2018). There were millions m 3 of dredged sediments produced per project, which might result in severe secondary pollution and uncertain ecological threats to the surrounding environment and human health, if not properly treated.…”

Section: Introductionmentioning

confidence: 99%

Residual Level, Profile and Potential Ecological Risk of Organochlorine Pesticides in Subsurface Sediments from Lakeshore Backfill Site and Lakebed of an Abandoned Oxidation Pond After Desilting for 15 Years

Wang

Liu

Tang

et al. 2021

Preprint

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The occurrence and distribution of 19 organochlorine pesticides (OCPs), together with microbial ester-linked fatty acid methyl ester (EL-FAME) profiles were investigated in sediments from an abandoned oxidation pond of Ya-Er lake, China, which had been heavily polluted by hexachlorocyclohexanes (HCHs) and chlorobenzenes in 1980s. Subsurface sediment samples were taken from five sediment cores along the transect running from lakeshore to lakebed. The concentration of total OCPs ranged from 29.8 to 941.8 ng g-1 dw, with a mean value of 193.3 ng g-1 dw. Hexachlorobenzene (HCB), HCHs and dichlorodiphenyl-trichloroethanes (DDTs) were the three dominant OCP classes, accounting for 26.5%-97.4%, 1.8%-51.5%, and 0.4%-15.5% of the total, respectively. Hot spots of HCB, HCHs and DDTs were detected in 0.9-2.7 m deep layers of the lakeshore, where was one of the dredged sediment backfill sites for in-situ remediation of the oxidation pond in 2002-2004. High potential risks of HCHs and HCB were still indicated. Historical industrial input (27.2%), recent agricultural input (14.7%), and persistent residuals (14.3%) were the three major identified sources of OCPs, using Absolute Principal Component Scores-Multiple Linear Regression (APCS-MLR). Redundancy analysis of microbial EL-FAME profiles and nine dominant OCPs revealed that the spatial variation in microbial community structure was significantly corresponded with the OCP composition. This is the first study highlighted the concern on historical industrial inputs of OCPs in subsurface sediments of the lakeshore disposal zone. The findings could help to distinguish the artificial backfill sediments from natural polluted sediments for optimization of further desilting plans.

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Section: Introductionmentioning

confidence: 99%

Residual Level, Profile and Potential Ecological Risk of Organochlorine Pesticides in Subsurface Sediments from Lakeshore Backfill Site and Lakebed of an Abandoned Oxidation Pond After Desilting for 15 Years

Wang

Liu

Tang

et al. 2021

Preprint

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“…“Microcosms” are experimental ecosystems constructed in the laboratory, expected to make it possible to evaluate ecotoxicity at the community level. They have been successfully applied in prediction of ecological fate and effects of xenobiotics in different environments [11] , [12] . The microalgae Pseudokirchneriella subcapitata and crustacean Daphnia magna are frequently used as models of autotroph and heterotroph organisms, respectively, in their formulation.…”

Section: Introductionmentioning

confidence: 99%

Co-encapsulation of Daphnia magna and microalgae in silica matrices, a stepping stone toward a portable microcosm

Perullini

Orias

Durrieu

et al. 2014

Biotechnology Reports

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We report on the first silica encapsulation of a metazoan (Daphnia magna), with a high initial viability (96% of the population remained active 48 h after encapsulation). Moreover, the co-encapsulation of this crustacean and microalgae (Pseudokirchneriella subcapitata) was achieved, creating inside a silica monolith, the smallest microcosm developed to present. This artificial ecosystem in a greatly diminished scale isolated inside a silica nanoporous matrix could have applications in environmental monitoring, allowing ecotoxicity studies to be carried out in portable devices for on-line and in situ pollution level assessment.

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“…The main families of pollutants concerned are heavy metals, Polycyclic Aromatic Hydrocarbons (PAHs) and Tributyltin (TBT), to which must be added a high chloride content leading to problems when these sediments are stored on land. The bioassays performed on these seaport sediments often reveal high ecotoxicity (Clément et al, 2009;Davoren et al, 2005a;Mamindy-Pajany et al, 2009;Wong et al, 1995). Rarer studies also mention genotoxicity (Kocan et al, 1985;Srut et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Ecotoxicological risk assessment linked to infilling quarries with treated dredged seaport sediments

Perrodin

Donguy

Bazin³

et al. 2012

Science of The Total Environment

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The dredged sediments of polluted seaports now raise complex management problems since it is no longer possible to discharge them into the sea. This results in the need to manage them on land, raising other types of technical, economic and environmental problems. Regarding the technical and economic dimensions, traditional waste treatment methods have proved to be poorly adapted, due to very high costs and low absorbable volumes. In this context, filling quarries in coastal areas with treated sediments could represent an interesting alternative for these materials. Nevertheless, for the environmental dimension, it is necessary to demonstrate that this possibility is harmless to inland ecosystems. Consequently, a specific ecotoxicological risk assessment methodology has been formulated and tested on three sediments taken from seaboards of France, in view to providing an operational and usable tool for the prior validation of any operation to fill quarries with treated seaport sediments. This method incorporates the formulation of a global conceptual model of the scenario studied and the definition of protocols for each of its steps: the characterisation of exposures (based on a simulation of sediment deposit), the characterisation of effects (via the study of sediments ecotoxicity), and the final ecotoxicological risk assessment performed as a calculation of a risk quotient. It includes the implementation in parallel of two types of complementary approach: the "substances" approach derived from the European methodology for assessing new substances placed on the market, and the "matrix" approach which is similar to methods developed in France to assess ecological risks in other domains (waste management, polluted site management, …). The application of this dual approach to the three sediments tested led to conclude with reliability that the project to deposit sediments "1" and "2" presented a low risk for the peripheral aquatic ecosystems while sediment "3" presented a high risk.

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Effects of a physico-chemical treatment of a dredged sediment on its ecotoxicity after discharge in laboratory gravel pit microcosms

Cited by 8 publications

References 33 publications

Residual Level, Profile and Potential Ecological Risk of Organochlorine Pesticides in Subsurface Sediments from Lakeshore Backfill Site and Lakebed of an Abandoned Oxidation Pond After Desilting for 15 Years

Residual Level, Profile and Potential Ecological Risk of Organochlorine Pesticides in Subsurface Sediments from Lakeshore Backfill Site and Lakebed of an Abandoned Oxidation Pond After Desilting for 15 Years

Co-encapsulation of Daphnia magna and microalgae in silica matrices, a stepping stone toward a portable microcosm

Ecotoxicological risk assessment linked to infilling quarries with treated dredged seaport sediments

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