3215
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
1
Figure 1. Sustainable management of contaminated sediments.
Sustainable Management of Contaminated Sediments
Gestion durable des sédiments contaminés
G. Holm
Swedish Geotechnical Institute, Linköping, Sweden
K. Lundberg & B. Svedberg
Luleå University of Technology, Luleå, Sweden
ABSTRACT: Increasing sea transport volumes require expansion of ports and due to longer, wider and more deep-draught ships
considerable dredging of sediments often contaminated with heavy metals and organic contaminants has to be implemented. Handling
options have to be identified in each actual case and the choice of option should be based on a sustainability approach, considering
economy, environment and social aspects. In the EU-
funded project “Sustainable Management of Contaminated Sedimen
ts in the
Baltic Sea” (SMOCS;
) within the Baltic Sea Region Programme 2007
-2013, tools for assessment and decision making
are developed, i. e. Life Cycle Analysis (LCA), Risk Assessment (RA) and Multi Criteria Decision Analysis (MCDA). To develop the
tools a series of case studies have been performed comparing different handling options such as land disposal, sea disposal, confined
aquatic disposal and beneficial use in port constructions utilizing the stabilization/solidification technology.
RÉSUMÉ :
L'augmentation des volumes de transport maritime nécessitent l'extension des ports,
et l’arrivée de navires plus longs,
plus larges et à plus fort tirant oblige le dragage considérable de sédiments souvent contaminés par des métaux lourds et des polluants
organiques. Différentes options de gestion doivent être identifiés dans chaque cas concret et le choix de l'option doit être fondé sur
une approche de durabilité, compte tenu de l'économie, l'environnement et les aspects sociaux. Dans l'UE, un projet financé par «La
gestion durable des sédiments contaminés de la mer Baltique "(SMOCS;
) au sein du programme régional de la mer
Baltique 2007-2013, des outils d'évaluation et de prise de décision sont développés, i. e. Analyse de Cycle de Vie (ACV), l'évaluation
des risques (RA) et la multi-analyse des critères de décision (MCDA). Pour développer ces outils, une série d'études de cas ont été
réalisées comparant diverses méthodes de manutention
telles que l’enfouissement
, l'immersion en mer
, l’immersion
confinée
aquatique et
l’utilisation
bénéfique dans les constructions portuaires en utilisant les technologies de stabilisation / solidification.
KEYWORDS: Contaminant, sediment, mangement, sustainablility, stabilisation, solidification.
1 INTRODUCTION.
Sea transport is increasing due to its environmental and
economic benefits. Ports are therefore a key part of the multi
module transport system in the society. In Sweden, for example,
the ports manage more than 90% of the tonnage in the trade. To
enable to manage this amount of trade, ports have to run and
operate a port infrastructure that is robust, cost effective and
environmentally sustainable.
The increase in sea transport as well as longer, wider and
more deep-draught ships cause huge needs of maintenance and
development dredging of sediments in fairways and ports. In the
coming years several million cubic meters of sediments need to
be dredged in the Baltic Sea. A large volume of these sediments
is contaminated with heavy metals and organic contaminants
(HELCOM, 2009). This highlights a key issue for the society in
the future - what is the sustainable management of these
sediments? To approach sustainable management assessments
should not be limited to site specific emissions but also include
other categories such as use of energy, resources and climate
impact (Arevalo, 2007). Handling options for dredged
sediments have to be identified in each actual case and the
choice of handling option should be based on a sustainability
approach, considering economy, environment and social
aspects, see Figure 1.
There are many possible options for managing contaminated
sediments; the two major ones are either to take action or no
action. In practice, action can include treatment in situ or ex-situ
implying numerous options incl. capping of sea deposits,
beneficial use of treated sediments as construction material or
capping in-situ.
In the EU-
funded project “Sustainable Management of
Contaminated Sediments in the Baltic Sea” (SMOCS;
) within the Baltic Sea Region Programme 2007-
2013 tools for assessment and decision making are developed.
1.1
Aim and objectives
The aim of this paper is to presents results of case studies on
assessment tools applicable in the sustainable management of
contaminated sediments. The case studies include the
stabilization/solidification (s/s) technology as one emerging
sustainable handling option. Furthermore the authors present
and invite stake holders to participate in networks to promote
sustainable management in sediment handling and other port
infrastructure.
Holm G.
Lundberg K., Svedb rg B.
