Neutralization of Calcite in Mineral Aerosols by Acidic Sulfur Species Collected in China and Japan Studied by Ca K-edge X-ray Absorption Near-Edge Structure

Differential utilization of isomers pyrite and marcasite by Acidianus manzaensis were comparatively studied, besides the iron and sulfur speciation transformation of the minerals was also investigated based on synchrotron radiation X-ray absorption near edge structure (XANES) spectroscopy. The results showed that the biooxidation of pyrite was faster than marcasite. The bioleached surface of both pyrite and marcasite are serious corroded, and the Fe (III)-containing species as well as jarosite were gradually produced, and more elemental sulfur species were formed on the marcasite surface than that for pyrite. It demonstrates the mineral structure does affect the biooxidation of pyrite and marcasite, and the more precipitated elemental sulfur might be one of the reasons leading to lower oxidation rate of marcasite by A. manzaensis.

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Sulfur Species in Source Rock Bitumen before and after Hydrous Pyrolysis Determined by X-ray Absorption Near-Edge Structure

Energy & Fuels ◽

10.1021/acs.energyfuels.6b00744 ◽

2016 ◽

Vol 30 (8) ◽

pp. 6264-6270 ◽

Cited By ~ 23

Author(s):

Trudy B. Bolin ◽

Justin E. Birdwell ◽

Michael D. Lewan ◽

Ronald J. Hill ◽

Michael B. Grayson ◽

...

Keyword(s):

Source Rock ◽

Sulfur Species ◽

Edge Structure ◽

X Ray ◽

Hydrous Pyrolysis ◽

Before And After ◽

X Ray Absorption

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In Situ Analysis of Sulfur Species in Sulfur Globules Produced from Thiosulfate by Thermoanaerobacter sulfurigignens and Thermoanaerobacterium thermosulfurigenes

Journal of Bacteriology ◽

10.1128/jb.00782-07 ◽

2007 ◽

Vol 189 (20) ◽

pp. 7525-7529 ◽

Cited By ~ 16

Author(s):

Yong-Jin Lee ◽

Alexander Prange ◽

Henning Lichtenberg ◽

Manfred Rohde ◽

Mona Dashti ◽

...

Keyword(s):

Structure Analysis ◽

Purple Sulfur Bacteria ◽

Sulfur Species ◽

Edge Structure ◽

X Ray ◽

Sulfur Bacteria ◽

End Groups ◽

Sulfur Globules ◽

X Ray Absorption

ABSTRACT The Firmicutes Thermoanaerobacter sulfurigignens and Thermoanaerobacterium thermosulfurigenes convert thiosulfate, forming sulfur globules inside and outside cells. X-ray absorption near-edge structure analysis revealed that the sulfur consisted mainly of sulfur chains with organic end groups similar to sulfur formed in purple sulfur bacteria, suggesting the possibility that the process of sulfur globule formation by bacteria is an ancient feature.

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Observation of transformation of calcite to gypsum in mineral aerosols by Ca K-edge X-ray absorption near-edge structure (XANES)

Atmospheric Environment ◽

10.1016/j.atmosenv.2008.04.012 ◽

2008 ◽

Vol 42 (26) ◽

pp. 6535-6541 ◽

Cited By ~ 25

Author(s):

Yoshio Takahashi ◽

Takuro Miyoshi ◽

Sadayo Yabuki ◽

Yasuhiro Inada ◽

Hiroshi Shimizu

Keyword(s):

Edge Structure ◽

X Ray ◽

Mineral Aerosols ◽

X Ray Absorption

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Chemical and orientational imaging of polymeric samples

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100168074 ◽

1994 ◽

Vol 52 ◽

pp. 68-69

Author(s):

H. Ade ◽

B. Hsiao ◽

G. Mitchell ◽

E. Rightor ◽

A. P. Smith ◽

...

Keyword(s):

Ethylene Terephthalate ◽

National Laboratory ◽

Brookhaven National Laboratory ◽

Carbonyl Groups ◽

Aromatic Rings ◽

Edge Structure ◽

X Ray ◽

Scanning Transmission ◽

Polymeric Samples ◽

X Ray Absorption

We have used the Scanning Transmission X-ray Microscope at beamline X1A (X1-STXM) at Brookhaven National Laboratory (BNL) to acquire high resolution, chemical and orientation sensitive images of polymeric samples as well as point spectra from 0.1 μm areas. This sensitivity is achieved by exploiting the X-ray Absorption Near Edge Structure (XANES) of the carbon K edge. One of the most illustrative example of the chemical sensitivity achievable is provided by images of a polycarbonate/pol(ethylene terephthalate) (70/30 PC/PET) blend. Contrast reversal at high overall contrast is observed between images acquired at 285.36 and 285.69 eV (Fig. 1). Contrast in these images is achieved by exploring subtle differences between resonances associated with the π bonds (sp hybridization) of the aromatic groups of each polymer. PET has a split peak associated with these aromatic groups, due to the proximity of its carbonyl groups to its aromatic rings, whereas PC has only a single peak.

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