Size-Dependent Variations in Fly Ash Trace Element Chemistry: Examples from a Kentucky Power Plant and with Emphasis on Rare Earth Elements

2017 ◽  
Vol 31 (1) ◽  
pp. 438-447 ◽  
Author(s):  
Jingjing Liu ◽  
Shifeng Dai ◽  
Xin He ◽  
James C. Hower ◽  
Tanaporn Sakulpitakphon
Keyword(s):  
Rare Earth ◽  
Fly Ash ◽  
Power Plant ◽  
Rare Earth Elements ◽  
Trace Element ◽  
Size Dependent ◽  
Trace Element Chemistry ◽  
Element Chemistry

Minor and trace element chemistry of carbonates, apatites and magnetites in some African carbonatites

1996 ◽  
Vol 60 (400) ◽  
pp. 415-425 ◽  
Author(s):  
J. B. Dawson ◽  
I. M. Steele ◽  
J. V. Smith ◽  
M. L. Rivers
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Trace Element ◽  
Light Rare Earth ◽  
Trace Element Chemistry ◽  
Element Chemistry ◽  
Fe And Mn ◽  
Ppm Level ◽  
Light Rare Earth Elements ◽  
Cu And Zn

AbstractIn calcites and dolomites in seven African carbonatites, SrO, FeO and MnO occur in concentrations from 1 to 2 wt.%, whereas Ce, Y, Cu and Zn occur only at the ppm level. Sr, Ce and Y partition preferentially into calcite relative to co-existing dolomite, whereas Fe and Mn favour dolomite. Sr partitions preferentially into calcite relative to co-exisiting apatite, but the light rare-earth elements partition into apatite. Magnetite from Kerimasi contains up to 13 wt.% MgO and 6 wt.% MnO, extending the known ranges in composition of magnetites from carbonatites.

Petrology, Mineralogy, and Chemistry of Size-Fractioned Fly Ash from the Jungar Power Plant, Inner Mongolia, China, with Emphasis on the Distribution of Rare Earth Elements

2014 ◽  
Vol 28 (2) ◽  
pp. 1502-1514 ◽  
Author(s):  
Shifeng Dai ◽  
Lei Zhao ◽  
James C. Hower ◽  
Michelle N. Johnston ◽  
Weijiao Song ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fly Ash ◽  
Power Plant ◽  
Rare Earth Elements ◽  
Inner Mongolia

scholarly journals Ponded and Landfilled Fly Ash as a Source of Rare Earth Elements from a Kentucky Power Plant

2017 ◽  
Vol 9 (1) ◽  
pp. 1-21 ◽  
Author(s):  
James C. Hower ◽  
John G. Groppo ◽  
Kevin R. Henke ◽  
Uschi M. Graham ◽  
Madison M. Hood ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fly Ash ◽  
Power Plant ◽  
Rare Earth Elements

Assessment of rare earth elements, Th and U profile of a site for a potential coal based power plant by instrumental neutron activation analysis

2018 ◽  
Vol 106 (6) ◽  
pp. 515-524 ◽  
Author(s):  
Rahat Khan ◽  
Md. Shohel Parvez ◽  
Umma Tamim ◽  
Sopan Das ◽  
Mohammad Amirul Islam ◽  
...  
Keyword(s):  
Rare Earth ◽  
Neutron Activation Analysis ◽  
Fly Ash ◽  
Instrumental Neutron Activation Analysis ◽  
Power Plant ◽  
Rare Earth Elements ◽  
Coal Fly Ash ◽  
Soil Samples ◽  
Preliminary Assessment ◽  
A Site

Abstract To study the compositional trends of rare earth elements (REEs: La, Ce, Nd, Sm, Eu, Tb, Dy, Yb, Lu), Th and U in soil samples collected from a site for a potential coal based power plant as well as to conduct a preliminary assessment of environmental impact of the proposed power plant in terms of REEs, Th and U, we have analyzed nine soil samples by instrumental neutron activation analysis. Evaluation of data quality by repeated analysis of IAEA-Soil-7 and IAEA-SL-1 ensures a proper data base-line for the REEs, Th and U abundances of the sampling site. Chondrite-normalized abundance patterns demonstrate the heavy REEs–light rare earth elements and Th–U fractionations in our sample suite along with significant negative Eu anomaly. Thorium/U ratio in our study area ranges from 4.55 to 6.07 which is higher than that of upper continental crust. Preliminary assessment of environmental impact of the proposed power plant is evaluated by taking NIST-SRM-1633b (coal-fly-ash) as contaminant as coal-fly-ash will be the major byproduct of the power plant. Previous literature studies and our prevailing data invoke that proposed power plant will have no severe impact on soil originated biota and on human health in terms of REEs, Th and U abundances. However, the long term effect of excessive REEs, Th and U as well as the other elemental abundances originating from coal-fly-ash should also be taken into an account.

scholarly journals Apatite as a tracer for magmatic-hydrothermal ore-forming processes

2021 ◽  
Author(s):  
S. Karvinen ◽  
◽  
A. Heinonen ◽  
C. Beier
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Trace Element ◽  
Analytical Techniques ◽  
Layered Intrusions ◽  
Minor Phase ◽  
Trace Element Chemistry ◽  
Hydrothermal Processes ◽  
A Minor

This project focuses on the trace element chemistry of igneous apatite in various magmatic systems with the use of in situ analytical techniques. The composition of apatite may possibly be used as a tracer for various magmatic-hydrothermal processes due to the breadth of chemical substitutions possible within the structure. Apatite is found in many mineralized layered intrusions as a minor phase. Apatite may be utilized in the tracking of metasomatic fluids in layered intrusions or in geochronological studies in the absence of other commonly used phases i.e. zircon. Apatite accumulations can be exploited economically for phosphorus and possibly for rare earth elements as well.

TRACE ELEMENT CHEMISTRY OF EMERALDS

2018 ◽  
Author(s):  
Casey Beaudoin ◽  
◽  
G. Nelson Eby
Keyword(s):  
Trace Element ◽  
Trace Element Chemistry ◽  
Element Chemistry

scholarly journals Coal fly ash as a resource for rare earth elements

2015 ◽  
Vol 22 (12) ◽  
pp. 9464-9474 ◽  
Author(s):  
Wojciech Franus ◽  
Małgorzata M. Wiatros-Motyka ◽  
Magdalena Wdowin
Keyword(s):  
Rare Earth ◽  
Fly Ash ◽  
Rare Earth Elements ◽  
Coal Fly Ash

Chemical variation of clinopyroxene phenocrysts from the trachybasaltic lavas of Mount Etna, Sicily

1980 ◽  
Vol 43 (330) ◽  
pp. 765-770 ◽  
Author(s):  
A. M. Duncan ◽  
R. M. F. Preston
Keyword(s):  
Trace Element ◽  
Mount Etna ◽  
Chemical Variation ◽  
Etna Volcano ◽  
Trace Element Chemistry ◽  
Sector Zoning ◽  
Steady Decrease ◽  
Element Chemistry

SummaryThe chemical variation of clinopyroxene phenocrysts from the trachybasaltic lavas of Etna volcano is described. The phenocrysts show a limited, but distinct trend in chemical variation from calcic-augite in the hawaiites to augite in the benmoreites. The trend of this variation is unusual, being one of Mg-enrichment with differentiation of the magma. Ca shows a steady decrease in the clinopyroxenes from the hawaiites to the benmoreites. Na, however, shows little chemical variation in the pyroxenes. The trace element chemistry is briefly examined. The clinopyroxenes show well-developed oscillatory and sector zoning. The basal {11} sectors are enriched in Si and Mg and depleted in Ti, Al, and Fe relative to the {100}, {110}, and {010} prism sectors.

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