Preparation, Characterisation and Testing of Photocatalytic Polymeric Membranes with Entrapped or Suspended TiO2

Various cellulose triacetate (CTA) or polysulfone (PSf) membranes with entrapped polycrystalline TiO2 were prepared by using different methods of the so-called phase inversion process. Porosity and permeability of the membranes increased by increasing the amount of entrapped TiO2 while rejection decreased. The photoactivity of entrapped TiO2 for the degradation of congo-red was compared with that of the same quantity of suspended TiO2 and the results indicated that TiO2 was always more efficient when used in suspension. A hybrid configuration consisting of a continuous membrane photoreactor with the photocatalyst in suspension showed to be the most promising one.

Estimation of historical vertical displacement at the Capo d’Orlando coast (Northern Sicily) based on submerged grinding wheels of Greek age

MILLSTONES COASTAL QUARRIES AS INDICATOR OF RELATIVE SEA LEVEL CHANGES

The Italian coasts shows numerous archaeological remains which reveals the activities that were carried out along the coast for thousands of years of history. In order to use archaeological structures for coastal studies, an accurate estimate of their relationship to the sea level at the time of construction is required (Lambeck et al 2004, Antonioli et al 2007, Auriemma & Solinas 2009). Millstone coastal quarries are only documented in southern Italy; they are carved on beachrock, calcarenites and other sedimentary rock easy to be exploited. Few archaeological information have been published about quarries for millstones extraction; they are documented since around 2500 yr BP (Amouretti, 1…