A Watershed Approach to Managing the Natural Resources in South Carolina

Environmental degradation from point and non-point source pollution in the past ten years has made it increasingly clear that threats to aquatic resources cannot adequately be addressed without a more integrated watershed approach to the management. Through comprehensive, qualitative interviews of experts in the watershed approach in South Carolina, recommendations will be made to improve this holistic process. Conducting interviews to compile institutional knowledge on the incentives and barriers from professionals working within the watershed approach will show how managing the natural resources in South Carolina could be more effective and efficient. By gathering experiences of lessons learned, best approach techniques, and suggestions for future watershed planning, several recommendations were made to further the use of the watershed approach in South Carolina.

Polarized interacting exciton gas in quantum wells and bulk semiconductors

We develop a theory to calculate exciton binding energies of both two- and three-dimensional spin polarized exciton gases within a mean field approach. Our method allows the analysis of recent experiments showing the importance of the polarization and intensity of the excitation light on the exciton luminescence of GaAs quantum wells. We study the breaking of the spin degeneracy observed at high exciton density (5×1010 cm2). Energy level splitting between spin +1 and spin -1 is shown to be due to many-body interexcitonic exchange while the spin relaxation time is controlled by intraexciton exchange. © 1996 The American Physical Society.

Electroadsorption of arsenic from natural water in granular activated carbon

The adsorption and electroadsorption of arsenic from a natural water has been studied in a filter-press electrochemical cell using a commercial granular activated carbon as adsorbent and Pt/Ti and graphite as electrodes. A significant reduction of the arsenic concentration is achieved when current is imposed between the electrodes, especially when the activated carbon was located in the vicinity of the anode. This enhancement can be explained in terms of the presence of electrostatic interactions between the polarized carbon surface and the arsenic ions, and changes in the distribution of most stable species of arsenic in solution due to As(III) to As(V) oxidation. In summary, electrochemical adsorption on a filter-press cell can be used for enhancement the arsenic remediation with activated carbon in the treatment of a real groundwater.

The natural history of Aleppo: containing a description of the city, and the principal natural productions in its neighbourhood : together with an account of the climate, inhabitants, and diseases, particularly of the plague

by Alex. Russell.

Shale gas in Bulgaria, the Czech Republic and Romania. Political context - legal status - outlook. OSW Report, September 2012

Despite their initial interest in shale gas exploration, over the past year Bulgaria, the Czech Republic and Romania have become increasingly sceptical about the development of unconventional gas resources. In January of this year Bulgaria introduced an indefinite ban on the exploration and production of shale gas and Romania followed suit in May by introducing a six-month moratorium on exploration work, which it plans to extend by another two years following the country’s parliamentary elections scheduled for December. Similar measures are being planned by the government in Prague. The aim of this report is to explore the reasons why countries which claim to want to improve their energy security have been showing increasing scepticism towards shale gas.

Outlook for Oil and Gas in Southern and Eastern Mediterranean Countries. MEDPRO Technical Report No. 18/October 2012

The aim of this report is to elaborate the MEDPRO Energy Reference Scenario for oil and gas supply and demand up to 2030 for southern and eastern Mediterranean countries. The report gives an assessment of • oil and gas reserves by country; • oil and gas production, domestic demand and export scenarios by country; and • the existing and planned infrastructure for oil and gas exports. Finally, the report presents some insights on the future role of the Mediterranean as an oil and gas transit region.

Dissolved CO2 and Alkane Gas in Clay Formations

Characterization of dissolved CO2 and alkane gas in clayrocks may help assessing the confinement properties of geological barriers considered as potential host rocks for a deep geological disposal as well as for caprocks of gas storages. A monitoring of alkanes with CO2, combined with carbon isotopes was performed on core samples coming from Underground Research Laboratories (Bure, Mont Terri, Tournemire) and the Schlattingen borehole in France and Switzerland. Composition of hydrocarbon gas and delta C-13 of methane strongly suggest a dominant thermogenic origin of methane which is mixed with a bacterial origin for the Toarcian shales, Pliensbachien and Callovian-Oxfordian clayrocks. Results also evidence the contrasted behavior of CO2, which is controlled by chemical equilibrium between pore water and carbonate mineralogy, compared to the alkanes which are present in the porosity as a stock of dissolved gases which can be depleted during degassing experiments. (C) 2015 The Authors. Published by Elsevier B.V.