Maurizio Bonardi
National Research Council
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Featured researches published by Maurizio Bonardi.
Environmental Technology | 1997
Guido Perin; Maurizio Bonardi; R. Fabris; B. Simoncini; Sabrina Manente; Luigi Tosi; S. Scotto
Bottom sediments of the central area of the Venice Lagoon (Italy) and some lagoon canals, chosen as an anaerobic reference environment, were analyzed by a sequential extraction procedure for Cr, Cu, Ni, Pb, Zn, Mn, and Fe. Bio-Available Phases (BAPs) and Non-Bio-Available Phases (NBAPs) have been determined in the Malamocco-Marghera Canal, to define the significant level of heavy metal contamination of the sediment. Relationships among metal distributions with Fe/Mn oxides/hydroxides and sulfides were determined in both environments, using statistical methods. The central lagoon area shows low pollution and a balanced influence of all the sediment components in the metal complexing processes, mostly due to the manganese and iron matrices. The inner canals are very polluted with heavy metals strongly bonded to H2S that form highly insoluble compounds, as demostrated through the correlation analysis. The authors suggest different procedures for lagoon restoration due to the different sediment behaviours, i....
Palaeogeography, Palaeoclimatology, Palaeoecology | 2004
R. Serandrei Barbero; A. D. Albani; Maurizio Bonardi
Abstract The Lagoon of Venice was formed during the Late Holocene transgression and anthropogenic remains are common within its sedimentary sequences. This study is based on the foraminiferal association of 58 samples from 7 cores obtained from salt marshes north of Venice. Below horizons of lagoonal origin, these samples reveal the presence of faunas with Trochammina inflata (Montagu) and Helenina anderseni (Warren) which indicate conditions that are characteristic of present-day salt marshes. Foraminiferal faunas can identify the different lagoonal environments and indicate the relative position of the various horizons with respect to sea level. Faunas obtained from the lower section of the cores are analogous to present-day assemblages and they indicate, below a transgressive phase, the existence of buried ancient salt marshes occupied by human settlements. The absolute age of these horizons indicates that the establishment of human settlements is much older than previously thought and that the average rate of Holocene relative sea level rise for the last 5000 years is of the order of 1.2 mm/yr. The formation of these salt marshes, and their subsequent submergence, occurred with rates of accretion and subsidence markedly variable and with occasional erosional phases. This study also shows that, within the present lagoonal environment, together with erosional processes there are areas of accumulation with the formation of new salt marshes.
Marine Pollution Bulletin | 2012
Sandra Donnici; Rossana Serandrei-Barbero; Maurizio Bonardi; Marcelo Sperle
Due to economic importance of Guanabara Bay, a multidisciplinary approach was adopted to investigate 88 surficial sediment samples in order to use the benthic foraminifera as indicators for the characterization of environmental variations. Grain-size analyses indicate that bottom sediments of the inner part of the bay are mainly muddy while those close to the entrance of the bay are sandy. Geochemical data show high concentration of heavy metals mainly in the northern region of the bay. Micropalaeontological analyses indicate the boundaries of the areas with the highest concentration of heavy metals. The dominant benthic foraminifera in the bay are Ammonia beccarii and Buliminella elegantissima, taxa capable of differentiating the presence of pollutants of different sources. B. elegantissima, in particular, has shown to be an indicator of anthropogenic pollution. The study highlights the worsening of environmental conditions since 2000 and those areas of the bay in need of a priority recovery.
Environmental Earth Sciences | 2007
Jorge L. Pousa; Luigi Tosi; Eduardo Kruse; Dardo Oscar Guaraglia; Maurizio Bonardi; Andrea Mazzoldi; Federica Rizzetto; Enrique J. Schnack
Continental Shelf Research | 2012
Stefano Covelli; Ioanna Protopsalti; Alessandro Acquavita; Marcelo Sperle; Maurizio Bonardi; Andrea Emili
IAHS-AISH publication | 2003
Federica Rizzetto; Luigi Tosi; Laura Carbognin; Maurizio Bonardi; Pietro Teatini
Geoarchaeology-an International Journal | 2011
Sandra Donnici; Rossana Serandrei-Barbero; Claudio Bini; Maurizio Bonardi; Alberto Lezziero
Archive | 2007
Luigi Tosi; Federica Rizzetto; Maurizio Bonardi; Sandra Donnici; Federico Toffoletto
Archive | 2007
Luigi Tosi; Federica Rizzetto; Maurizio Bonardi; Sandra Donnici; Federico Toffoletto
Archive | 2011
Luigi Tosi; Luca Baradello; Pietro Teatini; Massimo Zecchin; Maurizio Bonardi; Ping Shi; Cheng Tang; F Li; Giuliano Brancolini; Q Chen; B. Chiozzotto; Jane Frankenfield; Marco Giada; D Liu; D. Nieto; Federica Rizzetto; Y Sheng; Y Xiao; D Zhou