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A procedure for the extraction, separation and characterization of coal bitumen is described. A Carboniferous coal was subjected to exhaustive (single-step) extraction with dimethylacetamide (DMAA) at ambient temperature. The treatment solubilized 24 wt% of the organic matter. The bitumen was fractionated further and some fractions were separated into normal and branched/cyclic components. By...
The Eastern Harbour (EH) of Alexandria, a heavily polluted southeastern Mediterranean basin, is subjected to petroleum contamination from two different sources. Surficial bottom sediments sampled inside and outside the harbour were analysed for organic geochemical markers in order to assess and track the aliphatic hydrocarbon signature in the bottom sediments. The aliphatic hydrocarbon compositions...
The bitumens of a selection of subsurface sediments from Guaymas Basin, Gulf of California, have been analyzed in order to assess the hydrothermal effects on the organic matter and to better delineate the processes influencing the generation, deposition, and alteration of the hydrothermal petroleums at the seabed. Although the thermally generated subsurface bitumens are generally rich in polar/asphaltic...
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