Scanning proton microprobe analysis of mercury and other trace elements in Fe-sulfides from a Kentucky coal

Hower, James C.; Campbell, John L.; Teesdale, W.J.; Nejedlý, Zdeněk; Robertson, John

doi:10.1016/j.coal.2008.03.001

Cited by 91 publications

(53 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mastalerz et al (2004) assumed a correlation between Hg and pyrite, suggesting that mercury is only partially associated with pyrite. Similar observations, suggesting that elevated mercury content has been determined in only a few pyrites, have been reported by Hower et al (2008).…”

Section: The Chemical Analysis In the Micro Areasupporting

confidence: 74%

“…Framboidal pyrites generally contain less lead; its maximum value in the tested sulfides amounted to 0.19%. In the study by Hower et al (2008), lead content in pyrites also did not exceed 0.2%. The study by Diehl (2004) on Alabama coals found up to 18 ppm Pb in pyrites and has not found any relationship between pyrite development and the content of Pb.…”

Section: The Chemical Analysis In the Micro Areamentioning

confidence: 90%

See 1 more Smart Citation

The forms of occurrence and geochemistry of sulfides in hard coal deposits of the Libiąż Beds in the Upper Silesian Coal Basin, Southern Poland

Bielowicz

Misiak

2017

geol

View full text Add to dashboard Cite

Samples of coal from the eastern part of the Upper Silesian Coal Basin, between Jaworzno and Libiąż, were collected from test boreholes and underground excavations in the Janina Coal Mine, southwest Poland. The No. 111-119 hard coal seams are in the upper part of the Cracow Sandstone Series (the Libiąż Beds, Westphalian D). Macroscopically, iron sulfides (pyrite and marcasite) found in hard coal seams are usually in vein and impregnation forms. On the basis of microscopic observations, the following forms of iron sulfides occurrence in the studied coal were observed: framboidal pyrite, euhedral crystals, skeletal and massive vein forms, or pocket-like (impregnation) forms. On the basis of SEM-EDS analysis and X-ray diffraction it can be stated that the iron sulfides observed in coal are a mixture of pyrite and marcasite. WDS analysis in the micro area revealed the chemical composition of sulfides. The iron sulfides contain admixtures of Pb, Hg, Zn, Cu, Au, Ag, Sb, Co, and Ni. There was no As and Cd found in the examined minerals. It has been shown that the tested iron sulfides do not include significant admixtures. There is only a slight enrichment in lead in the vein forms of sulfides. In addition to the iron sulfides, individual inclusions of galena and sphalerite within the pyrite and marcasite have been observed. When it comes to iron sulfides in the vicinity of the crystallized galena, no lead (Pb) in the pyrites can be observed.

show abstract

Section: The Chemical Analysis In the Micro Areasupporting

confidence: 74%

Section: The Chemical Analysis In the Micro Areamentioning

confidence: 90%

The forms of occurrence and geochemistry of sulfides in hard coal deposits of the Libiąż Beds in the Upper Silesian Coal Basin, Southern Poland

Bielowicz

Misiak

2017

geol

View full text Add to dashboard Cite

show abstract

“…The confident level of mercury occurrence in coal was estimated 6 out of 10 (Finkelman 1994). It is generally considered that mercury can be presented in coal as sulfide and selenides, in forms associated with pyrite and marcasite (Ward et al 1999;Hower et al 2008;Kolker 2012), calcite and chlorite (Zhang et al 2002), selenio-galena (Dai et al 2006b(Dai et al , 2015, clausthalite (Hower and Robertson 2003), kleinite and cinnabar (Brownfield et al 2005), sphalerite (HgFeS 2 ) and getchellite (Dai et al 2006a). It can also organically bounded to organic matter (HgOM) (Rumayor et al 2015), or even as HgS and metallic mercury (Hg 0 ) (Finkelman 1994;Yudovich and Ketris 2005).…”

Section: Introductionmentioning

confidence: 99%

The distribution and occurrence of mercury in Chinese coals

Bai

Wang

et al. 2017

Int J Coal Sci Technol

View full text Add to dashboard Cite

Mercury is one of the most concerned hazardous elements in coals. 1018 coal samples of different coal-forming periods, coal-accumulating areas and coal ranks all over the country were collected to study the distributions of mercury in Chinese coals. The modes of occurrence of mercury were studied with float-sink experiments of 10 coals from different basins in China and correlation analyses were conducted between concentrations of mercury and maceral and sulfur contents, as well as the ash yield. The theoretic concentrations and affinities of mercury in vitrinite, inertinite, clay and pyrite were then calculated following the methods proposed by Solari. The weighted average concentration of mercury in Chinese coals is 0.154 lg/g, which is similar to that in the word coals in general. The mercury concentrations vary largely in the coals of different coal-forming period and coal-accumulating areas as geological settings play key roles in determining the geochemistry of mercury. The concentrations of mercury in coals from south and southwest China and those from North China of C 3 -P 1 are relatively higher while those from North China of J 1-2 and Northeast of J 3 -K 1 relatively lower. The general distribution trends of mercury are very similar to that of ash yield, sulfur contents in coals. Pyrite is the dominant carrier of mercury in most coals, especially in some high-sulfur coals with abundant epigenetic pyrite formed during diagenesis and metamorphism. Mercury has higher affinity to vitrinite than to inertinite in most coals, which accords with the geological origin of macerals and geochemistry of mercury.

show abstract

“…In this study as there is no significant positive relation exists between Cd and Zn; therefore, sphalerite as the source for Cd can be ignored. Zinc in most coal is generally associated with sulphides such as sphalerite and pyrite (Finkelman 1995;Hower et al 2008). There are some studies which reported that Zn is association with aluminosilicate (Zhou et al 2010).…”

Section: Mode Of Occurrence Of Metalsmentioning

confidence: 99%

Geochemical characteristics and mode of occurrence of trace elements in coal at West Bokaro coalfield

Equeenuddin

Tripathy

Sahoo

et al. 2016

Int J Coal Sci Technol

View full text Add to dashboard Cite

The mineralogy and trace element contents in coals from the West Bokaro coalfield, which is the one of the biggest Gondwana coalfields of India, were studied to delineate enrichment of trace elements and their modes of occurrence. Elemental concentrations with reference to their crustal abundances indicated that coals are relatively enriched in As (4.4-15.5 mg/kg), Cd (0.3-3.0 mg/kg), Cu (28.0-68.1 mg/kg) and V (46.6-178.0 mg/kg); depleted in Co (10.8-28.4 mg/ kg), Mn (7.6-483.4 mg/kg), Ni (13.0-31.6 mg/kg), Cr (14.2-85.5 mg/kg) and Zn (5.25-70.4 mg/kg). The concentration of As, Cd, Co, Cu and V were higher than the average values of world and Indian coals. Mineralogical study carried out by X-ray diffraction shows that quartz and kaolinite occur as dominant mineral phases in this coal. Fourier transform infrared spectroscopy pattern suggests organic structures primarily containing aromatic nuclei, aliphatic side chain and some oxygen containing groups. The modes of occurrence of trace elements present in these coals have been determined through statistical approach. Both Cu and Cr are more closely associated with mineral matter, whereas Co is dominantly present with its organic form. The concentrations of Cd, Mn, Ni, Zn, As and V have apparently occur in both organic and inorganic constituents. This study would be helpful to assess the potential environmental impacts during mining and combustion of this coal.

show abstract

Scanning proton microprobe analysis of mercury and other trace elements in Fe-sulfides from a Kentucky coal

Cited by 91 publications

References 50 publications

The forms of occurrence and geochemistry of sulfides in hard coal deposits of the Libiąż Beds in the Upper Silesian Coal Basin, Southern Poland

The forms of occurrence and geochemistry of sulfides in hard coal deposits of the Libiąż Beds in the Upper Silesian Coal Basin, Southern Poland

The distribution and occurrence of mercury in Chinese coals

Geochemical characteristics and mode of occurrence of trace elements in coal at West Bokaro coalfield

Contact Info

Product

Resources

About