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Digestion procedures for determining reduced sulfur species in bacterial cultures and in ancient and recent sediments

Allen, R. E. and Parkes, Ronald John 1995. Digestion procedures for determining reduced sulfur species in bacterial cultures and in ancient and recent sediments. In: Vairavamurthy, Murthy A., Schoonen, Martin A. A., Eglinton, Timothy I., Luther, George W. and Manowitz, Bernard eds. Geochemical transformations of sedimentary sulfur, ACS symposium series, vol. 612. Washington, DC: American Chemical Society, pp. 243-257. (10.1021/bk-1995-0612.ch013)

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A detailed study was made to determine the recovery of different sedimentary metal sulfide minerals, polysulfides and elemental sulfur by digestion procedures. This was a part of an investigation into the influence of bacterial sulfate reduction on the formation of authigenic pyrite and other sulfide minerals in the geological record. The recovery of different varieties of metal sulfide and forms of reduced sulfur from both artificial compounds, sediments and mineral specimens, indicates that hot AVS digestions, and cold followed by hot chromous chloride digestions produce the best recoveries combined with the greatest separation of sulfur pools for both ancient and Recent samples. The reaction time required to recover pyrite (up to 4 hours) is much greater than that previously reported (2 hours), especially when applied to Recent sediments and minerals. Recoveries of different sulfide minerals and elemental sulfur indicate that there may be an over-estimation of components used in degree of pyritization and sulfidation ratios. The application of the standardized methods to cultures of sulfate-reducing bacteria demonstrates that pyrite can be formed within three days. This method is also capable of producing accurate divisions of sulfur pools in sediments and sedimentary rocks.

Item Type: Book Section
Date Type: Publication
Status: Published
Schools: Earth and Ocean Sciences
Additional Information: Chapter 13
Publisher: American Chemical Society
ISBN: 9780841233287
ISSN: 19475918
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Last Modified: 04 Jun 2017 02:07

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