Distribution of trace metals in coastal sediments of the physiographical unit Capo Linaro - Monte Argentario
Author(s)
Piazzolla, Daniele
Date Issued
June 15, 2017
Type
Doctoral Thesis
Abstract
Trace metal pollution is a serious threat particularly in the marine environment.
In this context, the present work shows the spatial and temporal assessment of the
pollution degree and potential toxicity of trace metal in marine sediments of the coastal
area enclosed between Montalto di Castro and Capo Linaro, in northern Latium, Italy.
The distribution pattern and pollution levels of As and Mn in surface sediments highlight
two hotspots. These hotspots are due to the naturally high levels of As and Mn in the
Mignone River and Marangone Stream as well as the intense human activity in the area
including the Torrevaldaliga Nord power plant and the Port of Civitavecchia.
The high Hg concentrations detected in surface sediments confirm the extension of the
Hg anomaly of the coastal area of northern Latium, profoundly influenced by the
contributions of the Fiora and Mignone Rivers.
Trace metal concentrations detected in soft tissues of Paracentrotus lividus reflect the
presence of the hotspots and describe a detectable level of bioaccumulation throughout
the study area.
Furthermore, the temporal assessment carried out by the analysis of PT50 and MRG50
core samples taken in the southern sector of the study area shows the evolution of the
sediment mass accumulation rate values and the trace metal values within the last 60
years.
Additional information
Dottorato di ricerca in Ecologia e gestione sostenibile delle risorse ambientali
Subjects
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