Trace element mobility in a polluted marine sediment after stabilisation with hydraulic binders

MARINE POLLUTION BULLETIN

卷:110

Article

Saussaye, L.¹  Hamdoun, H.²  Leleyter, L.²  van Veen, E.^3,4  Coggan, J.³  Rollinson, G.³  Maherzi, W.⁵  Boutouil, M.⁵  Baraud, F.² 

[1] Ctr Etud & Expertises Risques Environm Mobil & Am, Direct Terr Normandie Ctr, Lab Reg Blois, FR-41000 Blois, France

[2] Normandie Univ, UNICAEN, Unite Rech Aliments Bioproc Toxicol Environm UR A, EA 4651, Bd Marechal Juin, F-14032 Caen, France

[3] Univ Exeter, Camborne Sch Mines CSM, Coll Engn Math & Phys Sci CEMPS, Penryn TR10 9EZ, Cornwall, England

[4] Univ Exeter, Environm & Sustainabil Inst ESI, Penryn TR10 9EZ, Cornwall, England

[5] Ecole Super Ingn & Travaux Construct Caen ESITC C, F-14610 Epron, France

关键词: Contaminated sediment;    Hydraulic binders;    Mineralogy;    Mobility study;    Trace elements;   

DOI  :  10.1016/j.marpolbul.2016.06.035

来源: Elsevier

【 摘 要 】

The management of dredged marine sediment is an issue for many harbours, particularly when contaminant concentrations prevent disposal at sea. The stabilisation/solidification of the sediments with hydraulic binders for a use in road subgrade layer is a potential alternative solution. However, the environmental acceptability is not yet fully established. This paper presents the results of a case study to comprehensively determine the stabilisation of As, Cd, Cr, Cu, Ni, Pb and Zn. After demonstrating that stabilisation/solidification affects the microstructure of the sediment, a mobility study is realised (single, sequential and kinetic extractions). According to the regulatory/technical guidelines the studied elements do not pose a risk to the environment. However, results from more complex mobility studies reveal that stabilisation in the short term is only effective for Ni while other elements are mobilised after treatment by at least one type of extraction. Stabilisation in the long term is not universally effective. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

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