Article

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

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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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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

ATC PO DON e

Penerbit

France : Elsevier., 2012

Deskripsi Fisik

10 p.

Bahasa

English

ISBN/ISSN

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Klasifikasi

PO

Tipe Isi

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Tipe Media

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Tipe Pembawa

online resource

Edisi

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Subjek

Sediments
Ecotoxicological risk assessment
Pollutants

Info Detail Spesifik

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Pernyataan Tanggungjawab

Gilles Donguy

Versi lain/terkait

Lampiran Berkas

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