Coal samples were collected from four coal mines in Iowa and analyzed by instrumental neutron activation analysis (INAA) for La, Ce, Sm, Eu, Tb, Yb, Lu, Sc, Cr, Co, As, Th, and U. A comparison of the compositions of whole coals to their high-temperature ashes indicates that essentially all of these elements reside in the ash. The abundance of most elements is consistent with a trend of decreasing elemental concentrations from east to west in United States coals. Pyrite separates were found to concentrate As, Cr and Co, while calcite separates were found to concentrate Sc. Rare earth element (REE) patterns are given for the Iowa coals
Rare earth element (REE) concentrations in coals are a source of information relevant to the evoluti...
A better understanding on geochemistry of elements in coal has both environmental and geological imp...
© SGEM2017. All Rights Reserved. There is a growing interest in the world in coal as critical raw ma...
Coal samples were collected from four coal mines in Iowa and analyzed by instrumental neutron activa...
Middle Pennsylvanian Cherokee Group coals from south-central and southeastern Iowa are typical high-...
Summarization: Major and trace element analyses were performed on coals from various locations in we...
[EN] The content and distribution of As, Ba, Be, Cd. Ce, Co, Cr, Cu, Dy. Er, Eu, Ge, Gd, Ho, La, Lu,...
The inorganic geochemistry of coals from the Cretaceous, Emery Coal Field, Utah and the Paleocene, P...
The objective is to provide modes of occurrence information for the CQ Inc. (CQ) effort being perfor...
The purpose of this study is to characterize the distribution and occurrence of rare earth elements ...
The concentrations of major and trace elements in ash residues of coals of the Benue Trough, Nigeria...
Abstract: The worldwide supply of rare earth element (REE’s) is restricted due to the scarcity of so...
Fort Union lignite coal samples were subjected to a series of aqueous leaching experiments to unders...
There are many sources trough which the soil get enriched and contaminated with REEs. The determinat...
In a cooperative agreement with DOE (Contract No. DE- AC22- 95101), the USGS has participated with P...
Rare earth element (REE) concentrations in coals are a source of information relevant to the evoluti...
A better understanding on geochemistry of elements in coal has both environmental and geological imp...
© SGEM2017. All Rights Reserved. There is a growing interest in the world in coal as critical raw ma...
Coal samples were collected from four coal mines in Iowa and analyzed by instrumental neutron activa...
Middle Pennsylvanian Cherokee Group coals from south-central and southeastern Iowa are typical high-...
Summarization: Major and trace element analyses were performed on coals from various locations in we...
[EN] The content and distribution of As, Ba, Be, Cd. Ce, Co, Cr, Cu, Dy. Er, Eu, Ge, Gd, Ho, La, Lu,...
The inorganic geochemistry of coals from the Cretaceous, Emery Coal Field, Utah and the Paleocene, P...
The objective is to provide modes of occurrence information for the CQ Inc. (CQ) effort being perfor...
The purpose of this study is to characterize the distribution and occurrence of rare earth elements ...
The concentrations of major and trace elements in ash residues of coals of the Benue Trough, Nigeria...
Abstract: The worldwide supply of rare earth element (REE’s) is restricted due to the scarcity of so...
Fort Union lignite coal samples were subjected to a series of aqueous leaching experiments to unders...
There are many sources trough which the soil get enriched and contaminated with REEs. The determinat...
In a cooperative agreement with DOE (Contract No. DE- AC22- 95101), the USGS has participated with P...
Rare earth element (REE) concentrations in coals are a source of information relevant to the evoluti...
A better understanding on geochemistry of elements in coal has both environmental and geological imp...
© SGEM2017. All Rights Reserved. There is a growing interest in the world in coal as critical raw ma...
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