Ricerc@Sapienza

This paper aims to deepen the understanding of the role of "local norms" in explaining ecological behavior within Ajzen's Theory of Planned Behavior. A longitudinal investigation (overall N = 222), focused on households waste recycling, tested the hypothesis that the effects of this type of norms on behavioral intentions varies as a function of the individual's spatial proximity to the social categories relevant to the social-physical context (in this study: housemates, neighbors, inhabitants of the district or quarter, and inhabitants of the city) in which the behavior takes place.

The proposed contribution, in response to the EU objectives on Resource Efficiency and Circular
Economy, offers a detailed overview of the most up-to-date international experiences on the reuse
of materials in architecture, illustrating in particular the peculiarities of the practices and context
conditions on the closed-loop use of materials in the building sector in Italy. The objective of the
present study, in particular, is to examine the feasibility at national level of the reuse strategy, in

The disposal of fibre reinforced composite materials is a problem widely debated in the literature. This work explores the ability to restore the mechanical properties of thermally conditioned basalt fibres through chemical treatments. Inorganic acid (HF) and alkaline (NaOH) treatments proved to be effective in regenerating the mechanical strength of recycled basalt fibres, with up to 94% recovery of the strength on treatment with NaOH.

An efficient and reliable post-consumer plastic packaging recovery represents one of the main targets of the sector in a circular economy perspective. Secondary plastics are still far to reach in EU important volumes in respect of primary ones, this is due to: i) the similar physical-chemical characteristics utilized to perform separation and ii) the transfer/collection methods. In this paper the results, referred to polyethylene (PE) and polypropylene (PP), achieved adopting a combined hyperspectral imaging-based approach in the VIS-SWIR ranges are reported.

Global plastic production is continuously increasing and there is a strong need to increase plastic recycling accordingly. The most demanded polymers and their main applications are introduced and an overview of the different operations forming the plastic recycling chain is presented. Mechanical recycling is the most important option to recover plastics; it can be carried out at “macro” or “micro” level, depending on the size of plastic waste.

Recycling Technologies: Paper Fiber
Waste Paper Characteristics
Waste Paper Recycling Technologies
Recycling Technologies: Glass
Cullet Contaminants
Cullet Recycling Technologies
Recycling Technologies: Metals
Ferrous Metals
Ferrous Metal Recycling Technologies
Nonferrous Metals
Nonferrous Metal Recycling Technologies
Recycling Technologies: Plastics
Waste Plastic Sources and Characteristics
Waste Plastic Recycling Technologies
Recycling Technologies: Fibers (Textiles and Carpets)
Textiles

Li primary batteries are currently treated along with other Li batteries in few big pyrometallurgical plants in northern EU countries. Pyrometallurgical processes present negative environmental impacts while hydrometallurgical processing can potentially ensure the integral recovery of all materials in li primary batteries. In this work, preliminary experimental findings obtained in LIFE-LIBAT project (LIFE16 ENV/IT/000389) about cryo-mechanical and chemical treatment of Li(0)-MnO2 batteries were reported.

Cobalt (Co) has exceptional high-temperature strength, corrosion-resistance, catalytic properties, and exceptional strength for electrochemical applications. This makes it a crucial element for high performance applications where EU is in the leads, e.g. jet engines and electrical power generation turbines, specialty high strength steel, samarium cobalt magnets, bind wear-resistant alloys, chemical industries and oil refineries.

End of life photovoltaic panels of different technologies (poly crystalline Si, amorphous Si, and CdTe) were treated mechanically in pilot scale by single shaft shredder minimizing the production of fine fractions below 0.4 mm (<18% weight). Grounded material was sieved giving: an intermediate fraction (0.4–1 mm) of directly recoverable glass (18% weight); a coarse fraction (which should be further treated for encapsulant removal), and fine fractions of low-value glass (18%), which can be treated by leaching for the removal of metal impurities.