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Different sulfur fractions of low sulfur (average 0.11%) coals from the latest Permian in southwestern China were analyzed isotopically at a high vertical resolution to examine the ramifications for potential terrestrial extinction mechanisms at the Permo-Triassic boundary. S org (organic sulfur) accounts for 87% of the total sulfur content on average, while S py (pyritic sulfur) is...
In connection with the determination of sulfate S, the sulfur mass balance for four bituminous coals was determined using different extraction procedures, including use of 1 m and 4.8 m HCl under nitrogen and under air, and at room temperature, 95°C and boiling point. Since HCl extractions yielded poor S mass balances (as low as 83%), acid extraction with formic acid was also evaluated. Extractions...
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