23 research outputs found
Production of activated carbon from a new precursor: Molasses
Activated carbon has been prepared from molasses, a
natural precursor of vegetable origin resulting from the sugar industry in
Morocco. The preparation of the activated carbon from the molasses has been
carried out by impregnation of the precursor with sulfuric acid, followed by
carbonization. The adsorption capacity, the BET surface area, and the pore
volume of the activated carbon were determined. The micropore volume was
assessed by Dubinin- Radushkevich (DR) equation. The activated materials are
mainly microporous and show the type I isotherm of the Brunauer
classification for nitrogen adsorption. The activation in steam yielded a
carbon that contains both micropores and supermicropores. Analysis of the
nitrogen isotherm by BET and DR methods established that most of obtained
carbons are highly microporous, with high surface areas (
m/g) and very low mesoporosity
21 cm intensity mapping
White Paper for the Astro2010 Astronomy Decadal ReviewUsing the 21 cm line, observed all-sky and across the redshift range from 0 to 5, the large scale structure of the Universe can be mapped in three dimensions. This can be accomplished by studying specific intensity with resolution ~ 10 Mpc, rather than via the usual galaxy redshift survey. The data set can be analyzed to determine Baryon Acoustic Oscillation wavelengths, in order to address the question: 'What is the nature of Dark Energy?' In addition, the study of Large Scale Structure across this range addresses the questions: 'How does Gravity effect very large objects?' and 'What is the composition our Universe?' The same data set can be used to search for and catalog time variable and transient radio sources
Elaboration and Characterization of Porous Materials from Moroccan Natural Resources: Application to Industrial Wastewater Treatment
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