Closing down Pääsküla landfill. Post-closedown environmental monitoring and maintenance of the landfill
© NMC Ltd. (10/2010)
Pääsküla landfill is the largest municipal waste landfill in Estonia which was established 1972 and closed 2003. The landfill was closed down during 2003-2006 within ISPA (The Instrument for Structural Policies for Pre-accession) project. At the moment of closing down its volume was 4,5 million cubic metres, relative height 29 metres and its area nearly 30 hectares. The total cost of the project was 11 225 009 EUR (175 633 228 EEK) including V.A.T 18 per cent. Objectives of the projects were to minimize the environmental impacts in a long perspective against main hazards as contamination of groundwater and surface water, landfill gas leakage, health hazards to neighbourhood dwellings and nuisance like smell, fly trash, gulls and other birds and rodents.

Early warning environmental information for the atmospheric environment: The AIRTHESS system
© Aristotle University of Thessaloniki (6/2009)
The present paper provides information on air quality (AQ) related early warning information provision, environmental information systems, and the way that such systems may support the quality of everyday life. On this basis, the paper presents the AIRTHESS system, being in operation in Thessaloniki, Greece.

Industrial Air Pollution and the Permitting Procedure of three thermal Power Stations of the Public Power Corporation (P.P.C.) S.A. in Greece
© Aristotle University of Thessaloniki (6/2009)
The three thermal Power Stations of the Public Power Corporation (P.P.C.) S.A. located in the Prefecture of Kozani caused significant air pollution problem due to their operation. This paper presents the Greek Ombudsman’s (GO), investigation for the legality of the Plants operation framework up to the end of 2005. Three main problems were revealed during the investigation. i. Air pollutant (and especially PM-10) emissions were above the admissible level on a systematic basis. ii. The power stations approved environmental terms had expired since 2002 and no renewal had taken place. Thus the industries operation was illegal. The issue was that the new environmental terms approval was delayed, because P.P.C. could not implement the Best Available Techniques that should have been incorporated in the terms decisions, according to the IPPC (96/61/EC) Directive requirements. iii. The three industries operation license was very close to expire and no progress was made on its renewal.

Application of satellite remote sensing and sun-photometers to determine the aerosol optical thickness over Cyprus
© Aristotle University of Thessaloniki (6/2009)
Urban air quality has traditionally been monitored with networks of ground monitoring stations and the use of models that evaluate emissions and predict changes in air quality at discrete points. The increasing availability of earth observing satellite systems together with advances in digital image processing techniques provide a new avenue to monitor urban air quality at a citywide and regional scale.

CFD study on the performance of a cyclone with tangential air inlet operating at high pressure
© Aristotle University of Thessaloniki (6/2009)
A computational fluid dynamic (CFD) study on the pressure drop and collection efficiency of a cyclone separator operating at high pressure (1, 6, 25 and 60 atm) was conducted. The cyclone was a high efficiency Stairmand, with a body diameter (Dc) of 0.3m and tangential air inlet. The inlet velocity was 20 m/s in all cases. Particles with diameters between 0.5 and 10 m and densities of 1500 and 3000 kg/m3 were used. The particle motion was simulated in a Lagrangian frame.

Theoretical study of the deposition of nano-sized aerosol particles in fiber filters
© Aristotle University of Thessaloniki (6/2009)
This work aims the development of a theoretical study for the diffusive deposition of aerosol nanoparticles on a single fiber, which is perpendicular to the flow direction.

Penetration of aerosol nanoparticles in fibrous filters
© Aristotle University of Thessaloniki (6/2009)
The performance of fiber filters was evaluated according to the penetration of nano-sized particles in homogeneous and heterogeneous fibers acting in aerosol filtration. Two fiber filters were utilized: a polyester fabric filter and a cellulose HEPA filter.

Comparison between MM5-CMAQ and WRF/CHEM PM10 and PM2.5 concentrations for an episode in Germany during Winter, 2003
© Aristotle University of Thessaloniki (6/2009)
High elevated PM10 and PM2.5 concentrations were measure in several monitoring stations locaten mainly in the North part of Germany during the Winter period of 2003. In particular three peaks in February and March are clearly identified. The average measured concentrations showed up to five times higher values (peaks) compared with normal concentrations for PM10 and PM2.5.

Deep investigation of ultrafine particles in urban air
© Aristotle University of Thessaloniki (6/2009)
This work describes the results of a study started in 2007 to investigate the ultrafine particle (UFP) pollution in the urban area of Rome. The sampling site was located in a street with high density of autovehicular traffic, where measurements have shown that carbonaceous particulate matter represented an important fraction of aerosol pollution.

DNA damage in human pulmonary cells exposed to organic extracts of PM2.5 collected from two urban sites at different traffic intensity
© Aristotle University of Thessaloniki (6/2009)
Genotoxic and oxidative effects of PM2.5 organic extracts from personal respirable dust samples of security guards working in two sites of Rome(Italy), were investigated. The PM 2.5 samples were collected at site 1 and site 2 characterized by moderate and high traffic intensity respectively.

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