86 research outputs found
Production and energy transformation of herbaceous biomasses irrigated with treated wastewater – first results
No full textThe first results on experiments with the goal of an agronomical, environmental, energetic and
economical evaluation about the biomass production from herbaceous species irrigated with treated wastewater are
reported in this paper. The experiments were conducted in collaboration with four Italian universities (within a
National Research Project, PRIN 2007): Padova, Bologna, Reggio Calabria and Catania. Six main herbaceous species
were tested by each university in their own experimental fields. In particular, each university planted four species
common to all units, one in the biggest plot and the others in three smaller plots. Physical, chemical and
microbiological analyses were carried out on wastewater samples. In particular, the following parameters were
evaluated: pH, electric conductivity, TSS, BOD5, COD, total phosphorus, ammonia, nitrite, nitrate and total nitrogen.
From an agronomic point of view, the growth dynamics, the translocations of assimilates between aerial and
subterranean organs, and the different species productivity were analysed. On the top part of the plants, the average
height, the biomass production, the moisture content at the harvesting and the heating values were measured
Produzione e caratterizzazione energetica di biomasse erbacee irrigate con acque reflue
No full textThe paper reports the results of the experimental activities carried out within a Nationa Research Project to evaluate the agronomic, envoronmental and energy sustainability of the biomass production by no-food crops irrigated with different kinds of treated wastewater. Four different research units monitored the same four main herbaceous species. physical and chemical analyses were carried out on wastewater samples. Bio-agronomical analysis on the species placed on fields were made with the goal to evaluate the main parameters sich as the productivity and the heating values. The analysis of the combustion efficiency, the amount of ash, and the environmental impact of the combustion residual was executed ina small boiler. The results highlight attractive biomass yield and an interesting crop energy capability by using treated wastewater for irrigation
Production and energy transformation of herbaceous biomasses irrigated with treated wastewater - First results
No full textEffects of wastewater irrigation on giant reed (Arundo donax L.) populations biomass production in different Mediterranean environments.
No full textThe competition for freshwater between agricultural, industrial, and civil uses has greatly intensified in many Mediterranean areas characterized by prolonged dry seasons. Agriculture accounts for 80% of all water consumption. Efficient use of water for crop irrigation and reuse of scarce quality waters is therefore needed for the conservation of this limited resource. Arundo donax L., a rhizomatous widespread spontaneous plant in Mediterranean regions, is considered among the species at high aptitude for biomass buildup. The aim of this study was to evaluate biomass production of arundo irrigated with different low quality water, at full ETp restitutions, in different Italian environments in relation to three harvest dates. Moreover the combustion data, moisture content, and heating values were measured. The average dry matter production, in the second year cultivation, ranged from 33 to 132 t ha-1. At a plant density of about 10 plant m-2 the highest shoot dry biomass ever measured in Italy was recorded. As concerns the harvest date, the results suggested that arundo reached the maximum biomass yield between November and January. These preliminary results suggest the interest in using treated wastewater for Arundo irrigation. Moreover, the intake of nutrients, present in the irrigation water may reduce fertilization costs and nutrient losses in the environment
Metamorfosi di città
No full textIl volume, curato e in gran parte tradotto dalla sottoscritta, presenta per la prima volta in volume l'opera del poeta cipriota. La scelta dei testi ripercorre l’itinerario della sua poesia indagando sull’idea di patria del Poeta, come sentimento doloroso e opprimente, e dell’eterno viaggio in città che si trasformano l’una nell’altra, spesso sinonimo e metafora della figura femminile
Enhancement of resonant absorption through excitation of SPR
No full textIn this experiment the absorption of the laser radiation impinging on polymeric films with Au nanoparticles implanted in surface was studied. By varying the polarization and the incidence angle of the laser radiation on target, the role in the laser absorption of both excitation of surface plasmons and excitation of electronic plasma waves at critical density through resonant absorption was highlighted. In conditions of p-polarized laser irradiations at 1015W/cm2 intensity, resonant absorption can be induced in films enhancing proton and ion acceleration. Plasma on-line diagnostics is based on SiC detectors. Measurements of kinetic energy of accelerated ions indicate a significant increment using p-polarized laser light with respect to no-polarized light irradiation
Biomass production of different wetland plant species irrigated with treated wastewater.
No full textSynthesis and characterization of new tyrosine capped anisotropic silver nanoparticles and their exploitation for the selective determination of iodide ions
No full textThe assessment of the iodine status of natural waters is crucial for focusing future strategies for controlling and monitoring iodine deficiency disorders (IDD). Nanoparticles have been increasingly used as sensors for several organic and inorganic analytes. In this study, we report the synthesis of new Tyrosine Capped Anisotropic Silver Nanoparticles (AgNPs). The AgNPs were characterized by TEM, UV–vis spectroscopy, and polarized and depolarized dynamic light scattering measurements, and were used for the quantitative determination of iodide ions in the presence of excess chloride ions. Both anions gave rise to an etching of the tips of the nanoprims converting them in rounded nanoplates. However, iodide ions perform this etching much better than chloride ones, allowing for their selective determination in tap waters. Fluoride and bromide anions give rise to a more efficient etching than chloride ions, but their presence does not interfere with iodide determination. This method was also used to determine the concentration of iodide in a sample of drinking water
Biomass production and N uptake of Giant reed under high water and N input in Mediterranean environments.
No full textThis study aimed to evaluate the productivity of Arundo donax under good water and N availability
coming from non-conventional sources, in different Italian environments (Padova and Bologna in the
north, Reggio Calabria and Catania in the south) in relation to three harvest periods (autumn; mid-winter;
late-winter).
In the northern locations A. donax had already reached maximum productivity the year after transplanting,
with 85 and 98 t ha−1 of dry matter at Padova and Bologna, respectively. At Reggio Calabria
and Catania a further biomass increase was obtained from the second to third year of cultivation, when
production was 62 t ha−1 and 51 t ha−1, respectively.
The average dry matter production was 74, 66 and 65 t ha−1 with autumn, mid-winter and late-winter
harvesting, respectively.
Under N input ranging from 225 to 329 kg ha−1 year−1 at the different locations, the apparent N balance
(input–output) was negative except in Catania indicating a great potential of A. donax to provide high N
uptake, which would be a useful feature in environments under the European Nitrates Directive
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