Geochemical Behavior of Trace Elements in the Upper and Lower Silesian Basin Coal-Fire Gob Piles of Poland

2019 ◽  
pp. 407-449
Author(s):  
Glenn B. Stracher
Keyword(s):  
Trace Elements ◽  
Geochemical Behavior ◽  
Coal Fire

Geochemical behavior of trace elements in Lake Biwa

Limnology ◽  
2005 ◽  
Vol 6 (2) ◽  
pp. 117-130 ◽  
Author(s):  
Masahito Sugiyama ◽  
Toshitaka Hori ◽  
Sorin Kihara ◽  
Masakazu Matsui
Keyword(s):  
Trace Elements ◽  
Lake Biwa ◽  
Geochemical Behavior

Trace element immobilization by uranyl minerals in granite-hosted uranium ores: Evidences from the Xiazhuang ore field of Guangdong province, China

2007 ◽  
Vol 95 (1) ◽  
Author(s):  
Long Lu ◽  
Fanrong Chen ◽  
Rodney C. Ewing ◽  
Rucheng Wang
Keyword(s):  
Trace Elements ◽  
Structural Change ◽  
Guangdong Province ◽  
Compositional Variation ◽  
X Ray Diffraction ◽  
Ore Deposit ◽  
Geochemical Behavior ◽  
X Ray ◽  
Significant Structural Change ◽  
Diffraction Patterns

The oxidative alteration of uraninite and the fate of trace elements (Y, LREE, Zr, and Th) in a granite-hosted uranium ore deposit in north Guangdong province, China, were investigated to understand the geochemical behavior of spent UOCompositionally, the cation atomic ratios in uranyl phases often deviate considerably from their respective stoichiometric values as indicated by the nominal formulae, but the compositional variation does not result in significant structural change as indicated by X-ray diffraction patterns. This observation indicates that the structure of U

Geochemical behavior and fate of trace elements in naturally contaminated soils under projected land-use changes

2019 ◽  
Vol 20 (3) ◽  
pp. 1413-1423
Author(s):  
Inmaculada Giráldez ◽  
Juan Carlos Fernández-Caliani ◽  
María Belén Rivera
Keyword(s):  
Land Use ◽  
Trace Elements ◽  
Contaminated Soils ◽  
Land Use Changes ◽  
Geochemical Behavior

Geochemical behavior and remobilization potential of trace elements in surface sediments from the baixada santista industrial area, Southeastern Brazilian coast

2020 ◽  
Vol 5 (4) ◽  
pp. 505-518
Author(s):  
Bianca Sung Mi Kim ◽  
Paulo Alves de Lima Ferreira ◽  
José Lourenço Friedmann Angeli ◽  
Keila Modesto Tramonte ◽  
Michel Michaelovitch de Mahiques ◽  
...  
Keyword(s):  
Trace Elements ◽  
Surface Sediments ◽  
Industrial Area ◽  
Brazilian Coast ◽  
Geochemical Behavior

Geochemical behavior of trace elements in sub-tidal marine sediments of the Belgian coast

2009 ◽  
Vol 117 (1-4) ◽  
pp. 88-96 ◽  
Author(s):  
Yue Gao ◽  
Ludovic Lesven ◽  
David Gillan ◽  
Koen Sabbe ◽  
Gabriel Billon ◽  
...  
Keyword(s):  
Trace Elements ◽  
Marine Sediments ◽  
Geochemical Behavior ◽  
Belgian Coast

Microanalytical Identification of a New Zr-Nb-Fe Phase

1990 ◽  
Vol 48 (2) ◽  
pp. 132-133
Author(s):  
O.T. Woo ◽  
G.J.C. Carpenter
Keyword(s):  
Trace Elements ◽  
Cold Rolling ◽  
Proportionality Factor ◽  
Tube Material ◽  
X Ray ◽  
Metal Foils ◽  
Arc Melting ◽  
Intermetallic Particles ◽  
Intermetallic Precipitates ◽  
Cold Worked

To study the influence of trace elements on the corrosion and hydrogen ingress in Zr-2.5 Nb pressure tube material, buttons of this alloy containing up to 0.83 at% Fe were made by arc-melting. The buttons were then annealed at 973 K for three days, furnace cooled, followed by ≈80% cold-rolling. The microstructure of cold-worked Zr-2.5 at% Nb-0.83 at% Fe (Fig. 1) contained both β-Zr and intermetallic precipitates in the α-Zr grains. The particles were 0.1 to 0.7 μm in size, with shapes ranging from spherical to ellipsoidal and often contained faults. β-Zr appeared either roughly spherical or as irregular elongated patches, often extending to several micrometres.The composition of the intermetallic particles seen in Fig. 1 was determined using Van Cappellen’s extrapolation technique for energy dispersive X-ray analysis of thin metal foils. The method was employed to avoid corrections for absorption and fluorescence via the Cliff-Lorimer equation: CA/CB = kAB · IA/IB, where CA and CB are the concentrations by weight of the elements A and B, and IA and IB are the X-ray intensities; kAB is a proportionality factor.

XRMF applications of a monolithic, polycapillary, focusing x-ray optic

1996 ◽  
Vol 54 ◽  
pp. 240-241
Author(s):  
D. A. Carpenter ◽  
Ning Gao ◽  
G. J. Havrilla
Keyword(s):  
Trace Elements ◽  
Point Source ◽  
Focal Spot ◽  
Fluorescence Analysis ◽  
X Rays ◽  
Focal Distance ◽  
Spot Diameter ◽  
X Ray ◽  
Focal Spot Diameter

A monolithic, polycapillary, x-ray optic was adapted to a laboratory-based x-ray microprobe to evaluate the potential of the optic for x-ray micro fluorescence analysis. The polycapillary was capable of collecting x-rays over a 6 degree angle from a point source and focusing them to a spot approximately 40 µm diameter. The high intensities expected from this capillary should be useful for determining and mapping minor to trace elements in materials. Fig. 1 shows a sketch of the capillary with important dimensions.The microprobe had previously been used with straight and with tapered monocapillaries. Alignment of the monocapillaries with the focal spot was accomplished by electromagnetically scanning the focal spot over the beveled anode. With the polycapillary it was also necessary to manually adjust the distance between the focal spot and the polycapillary.The focal distance and focal spot diameter of the polycapillary were determined from a series of edge scans.

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