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Dive into the research topics where Maurizio Bonardi is active.

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Featured researches published by Maurizio Bonardi.


Environmental Technology | 1997

Heavy metal pollution in central Venice lagoon bottom sediments: evaluation of the metal bioavailability by geochemical speciation procedure.

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

Ancient and modern salt marshes in the Lagoon of Venice

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

Benthic foraminifera as proxies of pollution: The case of Guanabara Bay (Brazil)

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

Coastal processes and environmental hazards: the Buenos Aires (Argentina) and Venetian (Italy) littorals

Jorge L. Pousa; Luigi Tosi; Eduardo Kruse; Dardo Oscar Guaraglia; Maurizio Bonardi; Andrea Mazzoldi; Federica Rizzetto; Enrique J. Schnack


Continental Shelf Research | 2012

Spatial variation, speciation and sedimentary records of mercury in the Guanabara Bay (Rio de Janeiro, Brazil)

Stefano Covelli; Ioanna Protopsalti; Alessandro Acquavita; Marcelo Sperle; Maurizio Bonardi; Andrea Emili


IAHS-AISH publication | 2003

Geomorphic setting and related hydrogeological implications of the coastal plain south of the Venice Lagoon, Italy

Federica Rizzetto; Luigi Tosi; Laura Carbognin; Maurizio Bonardi; Pietro Teatini


Geoarchaeology-an International Journal | 2011

The caranto paleosol and its role in the early urbanization of Venice

Sandra Donnici; Rossana Serandrei-Barbero; Claudio Bini; Maurizio Bonardi; Alberto Lezziero


Archive | 2007

Note illustrative della Carta Geologica d’Italia alla scala 1: 50.000: Foglio 128 Venezia

Luigi Tosi; Federica Rizzetto; Maurizio Bonardi; Sandra Donnici; Federico Toffoletto


Archive | 2007

Note illustrative della Carta Geologica d’Italia alla scala 1: 50.000, Foglio 148–149 Chioggia-Malamocco

Luigi Tosi; Federica Rizzetto; Maurizio Bonardi; Sandra Donnici; Federico Toffoletto


Archive | 2011

Combined continuous electrical tomography and very high resolution seismic surveys to assess continental and marine groundwater mixing

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

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Luigi Tosi

National Research Council

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Sabrina Manente

Ca' Foscari University of Venice

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Guido Perin

Ca' Foscari University of Venice

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Andrea Cucco

National Research Council

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Andrea Mazzoldi

National Research Council

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