Managing of dredged sediments applying a non conventional technique (Contributo in atti di convegno)

Type
Label
  • Managing of dredged sediments applying a non conventional technique (Contributo in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Masciandaro, Grazia; Ceccanti, Brunello; Iannelli, Renato; Bianchi, Veronica (2011)
    Managing of dredged sediments applying a non conventional technique
    in XII International Conference of Environmental Science and Technology, Rodi, Grecia, 8-10 settembre 2011
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Masciandaro, Grazia; Ceccanti, Brunello; Iannelli, Renato; Bianchi, Veronica (literal)
Pagina inizio
  • 190 (literal)
Pagina fine
  • 197 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • ID_PUMA:/cnr.ise/2011-A2-004Area di valutazione 04 - Scienze della Terra (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ISE, Sede distaccata di Pisa (literal)
Titolo
  • Managing of dredged sediments applying a non conventional technique (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autoriVolume
  • Masciandaro, Grazia (1); Ceccanti, Brunello (1); Iannelli, Renato (2); Bianchi, Veronica (2) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • ISTB (literal)
Abstract
  • The non-conventional technique proposed in this study, intends to transform lightly polluted and saline sediments (considered as waste) into soil that can be re-used for agronomic and environmental applications. This simple and low cost technology is already known in the literature as phyto-treatment, but the possibility of transforming sediments in reusable material is the real innovation (Bianchi et al., 2010). As soon as the sediments reach the compliance with the quality criteria, they are supposed suitable for agricultural use, landscaping of areas inside or outside the port (e.g. by providing a garden centre with arable land), or for the capping of landfills. The selection of the vegetal species used for the phyto-treatment is particularly important since they must be resilient to the difficult conditions of salinity and compactness typical of dredged sediments; the successfully growth of plant species was possible through a pre-conditioning of the sediments, basing on previous meso-scale experiences (Bianchi et al., 2008) using inert material, agronomic amendment and/or organic substances that improve the physical and chemical characteristics of the sediment. The non-conventional technique was applied to the sediments dredged from Livorno port, in Italy. A demonstrative facility was built to treat about 80 m3 of sediments, and it was hydraulically equipped to follow water leaching. The facility was divided in four different plots, to test three different plant species (Paspalum vaginatum, Tamarix gallica and Spartium junceum) planted in combination, in comparison to an unplanted plot. The facility was monitored following some chemical, biochemical, physical and hydraulic analyses. For the chemical, biochemical and physical analyses, periodical samples on sediments at two different depths (0-20 cm; 20-40 cm) were performed. Chemical analyses included: pH, E.C., nutrients content, inorganic and organic pollutants content (heavy metals and total petroleum hydrocarbons). Biochemical analyses consisted in a specific enzymatic characterization, specifically selected for sediments. Physical analyses included texture and water content. Hydraulic analysis consisted in a water mass balance, performed in two different seasons (summer and winter). Good results were obtained in terms of proper adaptation of plant species, after six months of activity. This was confirmed also by chemical results, in terms of nutrient content and abetment of contaminants. Furthermore, the water mass balance successfully confirmed the correct supply of water, monitored by rainfall sensor, capacitance probe and a continuous collection of data. Specific biochemical analyses could be useful to detect the transferability of the root system's microbiological heritage to sediments. (literal)
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