GUEZENNEC , Anne-Gwenaëlle

The aim of this review was to summarize information and scientific data from the literature dedicated to the fate of PAM-based flocculants in hydrosystems. Flocculants, usually composed of polyacrylamides (PAMs), are widely used in several industrial fields, particularly in minerals extraction, to enhance solid/liquid separation in water...

Arsenic speciation was determined in marina sediments of the French Mediterranean coast. The sediment from L'Estaque marina was highly impacted by both metallurgical activities and by the commercial port of Marseille, in contrast to the sediment from St Mandrier marina that was less polluted. In the solid phases, As(III) was the dominant...

International audience

A recent evaluation of the potential impact of arsenic on human health revealed high concentrations of arsenic in marine sediments of the South Marseille littoral. The marine cycle of arsenic is well described in the water column, from dissolved species to phytoplankton, zooplankton and more complex organisms. In contrast, only scarce data are...

Flocculants are widely used in several industrial fields (mineral extracting, chemical industry, food processing industry, treatment of drinking water) to enhance solid/liquid separation in water containing suspended matter. In France, mineral extracting industry is the major user of flocculants. The use of flocculants enables to increase the...

The management of polluted sediments is problematic because to date no economically suitable process allows the complete and durable stabilization of pollutants. Some marine sediment contains arsenic at concentrations far higher than the limit that imposes a specific treatment to reduce their toxicity. The aim of ASEDMAR project...

Harbour and marina sediments represent particular environments, with high concentrations in organic carbon and pollutants. Over 50 million m3 of marine sediments are dredged every year in French maritime and commercial ports, to maintain the water depth suitable for navigation, and the most part of them is discharged in deeper sea zones. The...