Ricerc@Sapienza

The Caspian Sea hosts areas of high ecological value as well as industrial, leisure, and agricultural activities that dump
into the water body different kinds of pollutants. In this complex context, a proper description of the origin and potential
sources of pollution is necessary to address management and mitigation actions aimed at preserving the quality of the
water resource and the integrity of the ecosystems. Here, we aimed at detecting sources of both nitrogen inputs, by N

Effects of two chemical forms of Nitrogen (NH4
+ and NO3
?) on ?15N in Ulva lactuca were analysed separately and
in mixture at two concentrations.We assessedwhether the ?15Nvaluesof U. lactuca discriminate between Nitrogen
from synthetic fertilisers (inorganic) and from fresh cow manure (organic), and the isotopic ability of the
macroalga to reflect Nitrogen concentrations. Isotopic signature and N content of themacroalga reflected different
nitrogenous sources and their concentrations after 48 h. The inorganic Nitrogen source (NH4NO3) altered the

Both micro and macro algae have a potential to be a valuable feedstock for biorefineries. The theoretical impact assessment of this kind of plant can be carried out through an LCA, which is a key tool in order to evaluate the potential environmental impact of a process throughout its entire life cycle. Hence, it is a priority to perform an LCI with the aim of gathering all the data and simulating all the unit process of a theoretical biorefinery. The Inventory ensures to obtain a simple and immediate way to represent several aspects of a biorefinery, e.g.