Articolo in rivista, 2021, ENG, 10.1007/s11356-021-13134-y

Landfarming as a sustainable management strategy for fresh and phytoremediated sediment

Macci C.; Peruzzi E.; Doni S.; Vannucchi F.; Masciandaro G.

Research Institute on Terrestrial Ecosystems - National Research Council of Italy (CNR-IRET), Via Moruzzi 1, Pisa, 56124, Research Institute on Terrestrial Ecosystems - National Research Council of Italy (CNR-IRET), Via Moruzzi 1, 56124, Pisa, Italy, , Italy

The aim of this study was to evaluate the effectiveness of a landfarming process (LP) in recovering sediments at different biodegradation phases: phytoremediated dredged sediments (PDS) and fresh dredged sediments (FDS). The PDS landfarming was applied to (1) reduce residual contamination and (2) improve the biological activities in order to obtain a decontaminated matrix rich in organic matter and enzymatic activity to be reused as agronomic substrate. In 3 months of LP, a microbial activity stimulation (from 7 to 48%) and a decrease in organic contamination (about 15%) were recorded. In addition, no phytotoxicity and the content in total organic carbon and nitrogen make the sediments suitable to be reused in agriculture. The FDS landfarming was carried out to (1) reduce water content, (2) transform the organic matter into a more stable form, and (3) decrease organic contaminant level. Five months of LP led to a considerable reduction in water content (40%) and to the activation of microbial biomass metabolism (from 4 to 50 times higher), which achieved proper mineralization of organic matter and contaminants (polycyclic aromatic hydrocarbons near to zero and a total petroleum hydrocarbon reduction of about 60%). The LP also enhanced the stoichiometric ratios of nutrients and enzymes. In conclusion, the LP was a promising and economical methodology to improve the physical, chemical, and biological properties of polluted sediments at different biodegradation phases, creating a substrate ready for several environmental applications. Notably, the PDS resulted appropriate for agricultural use and FDS for civil applications.

Environmental science and pollution research international 28 , pp. 39692–39707

Keywords

economia circolare, riciclaggio, bioremediation, rifiuti

CNR authors

Vannucchi Francesca, Masciandaro Grazia, Macci Cristina, Doni Serena, Peruzzi Eleonora

CNR institutes

IRET – Istituto di Ricerca sugli Ecosistemi Terrestri

ID: 466930

Year: 2021

Type: Articolo in rivista

Creation: 2022-05-11 08:57:47.000

Last update: 2023-07-20 10:37:09.000

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:466930

DOI: 10.1007/s11356-021-13134-y

Scopus: 2-s2.0-85103182183