Evaluation of phytotoxicity of seaport sediments aged artificially by rotary leaching in the framework of a quarry deposit scenario.
Mar Pollut Bull
; 86(1-2): 48-58, 2014 Sep 15.
Article
in En
| MEDLINE
| ID: mdl-25110051
ABSTRACT
In the framework of an ecological risk assessment of seaport sediments for terrestrial ecosystems when deposited in quarries, we simulated the "ageing" of sediments exposed to rain. This experiment highlighted an inflection point at the solid/liquid ratio 1/25, after which the extraction of pollutants increases moderately. The raw sediments studied inhibited the germination of Lolium perenne and Armeria maritima (a halophytic species) seeds. Furthermore, they affected the early development of L.perenne. The same sediments, leached at a ratio of 1/25, presented a reduction of acute (germination) and chronic (growth) phytotoxicity. The bioconcentration factors of the metals studied decreased with the leached sediment, except for Cu which was still clearly identified in root parts. Thus rotary leaching tests and phytotoxicity bioassays can be used to provide an initial assessment of the ability of plants, particularly halophytes, to colonize deposits of dredged seaport sediments.
Key words
Full text:
1
Database:
MEDLINE
Main subject:
Soil Pollutants
/
Refuse Disposal
/
Risk Assessment
/
Geologic Sediments
/
Metals, Heavy
Type of study:
Etiology_studies
/
Evaluation_studies
/
Prognostic_studies
Limits:
Humans
Language:
En
Year:
2014
Type:
Article