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Volume 2

Global NEST Journal cover

Global NEST Journal

ISSN numbers
1790-7632
2241-777X

Volume

Volume number
2
Publication year
2000

Central Composite Design in a Refinery’s Wastewater Treatment by Air Flotation

by

Rigas F., Panteleos P. and Laoudis C.

General

Water resulting from the dewatering process of petroleum storage tanks was treated in a pilot separator to investigate the effectiveness of the combined action of a coagulant (aluminum sulfate) and a cationic flocculant (NALCO 71403). Central composite design of experiments was used to construct...

Optimization bench-scale separator +2 more

Metal Speciation Studies in a Brakish/Marine Interface System

by

Scoullos M. J. and Pavlidou A. S.

General

The paper presents some interesting results of metal speciation studies employing Anodic Stripping Voltammetry (ASV) applied in a dynamic natural system such as the brakish – marine interface formed between the polluted waters discharged by the Koumoundouros lake and the marine ones of the Gulf of...

Metal speciation Koumoundouros lake +5 more

Observations of the directional spectrum relaxation of wavefields in slowly and rapidly turning winds

by

Tsanis I.K. and Brisette F.

General

A so called “Exact Form” of the Maximum Likelihood Method is used to obtain directional spectrum estimates from a 3-meter NDBC discus buoy, part of the Surface Wave Dynamics Experiment (SWADE) field array. The method was used to look at the response of wavefields to turning winds with various wind...

water waves directional spectra +3 more

Neural Networks for Environmental Problems: Data Quality Control and Air Pollution Nowcasting

by

Benvenuto F. and Marani A.

General

This work illustrates the use and some related results of Artificial Neural Networks (ANNs) for data quality control of environmental time series and for reconstruction of missing data. ANNs are applied to the following problems: i) short and medium-term predicting of air pollutant concentrations in...

Artificial neural networks times series nowcasting - forecasting - interpolating - extrapolating.

Management of Resources for Sustainable Development: Entropy "SHOWS" the way

by

Tassios D.

General

The purpose of “Sustainable Development” raises the following basic question: Which “indicator” should be used to identify the human activities that are contrary to this purpose? In this paper it will be shown that “Entropy Generation” constitutes this Indicator. To this purpose, we will use three...

Sustainable development Entropy Generation

Sustainability and regional development: the case of the tourism sector in Southern Europe

by

Modinos M.

General

The present work argues that sustainable tourism is essential to the long-term survival of the tourism industry in Europe. Sustainable tourism may be regarded as a means of redressing economic imbalances between European regions and nations without producing adverse environmental, social and...

Environmental planning natural resources and ecosystems management +3 more

Natural restoration of radiopolluted ecosystems and impact on human health

by

Arapis G. D.

General

The vertical migration velocity of radionuclides and the ability of soils components to immobilise them, as the most important parameters of natural-restoration, was studied. The Dose Equivalent Rate (DER) reduction of external ã-radiation was studied in order to assess its impact on human health...

Radionuclides radioactive pollution +3 more

Removal of dyes from aqueous solutions by adsortion on mixtures of fly ash in batch and column techniques

by

Albanis T.A., Hela D.G., Sakellarides T.M. and Danis T.G.

General

Adsorption and removal of commercial dyes were studied in aqueous suspensions of fly ash mixtures with a sandy clay loam soil of low organic matter content. The commercial dyes, acid orange 7, acid yellow 23, disperse blue 79, basic yellow 28 and direct yellow 28 represent the widely used nitroazo...

Azo dyes fly ash +5 more

Application and Verification of a three-dimensional Hydrodynamic Model to Hamilton Harbour, Canada

by

Tsanis I.K. and Jian Wu

General

A multi-layered three-dimensional hydrodynamic model has been developed to provide flow fields and water level changes in Hamilton Harbour. The field data collected in Hamilton Harbour during 1990 & 1991 field seasons was used for model verification. The simulated currents were compared with current...

Hydrodynamic Model Trajectory Model +2 more