PIXE analysis of the hydrothermal leaching of trace elements in coal

Blanchard, L.J.; Robertson, John; Srikantapura, S.; Parekh, B.K.

doi:10.1007/bf02035237

Cited by 10 publications

(6 citation statements)

References 4 publications

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“…Such results, although curious in logic, are not uncommon. In the related studies, , the percentage remained in residue after the coal cleaning was sometime more than 100%. This may be due to contamination from solutions, leaching of reactor components, sample heterogeneity, and other factors.…”

Section: Resultsmentioning

confidence: 96%

“…The main conclusion of NaOH leaching was that high removal yields were obtained for only V, Ga, As, and Br. In all the above studies, − only certain trace elements could be removed. In this study, we applied the CaO/HCl treatment, but only certain trace elements were removed as shown in Figure .…”

Section: Discussionmentioning

confidence: 99%

“…Although most of the trace elements are removed in particulate removal and desulfurization systems, small amounts are still emitted into the atmosphere. , To reduce the trace elements emission to much lower level, the following two attempts are made. One is capture of trace elements in flue gas by using sorbents such as activated carbon and several kinds of mineral matter, − and the other is removal of trace elements prior to the combustion. − …”

Section: Introductionmentioning

confidence: 99%

“…One is capture of trace elements in flue gas by using sorbents such as activated carbon and several kinds of mineral matter, [3][4][5][6][7] and the other is removal of trace elements prior to the combustion. [8][9][10][11][12] In the case of the capture by sorbents, a specific sorbent is needed for each element and absorption characteristics depend on several conditions such as temperature and flue gas composition. Therefore, complex facilities are needed for complete removal of trace elements from flue gas.…”

Section: Introductionmentioning

confidence: 99%

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Effectiveness of Hydrothermal Treatment of Coal with Lime for Removal of Trace Elements

et al. 2002

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The possibility of applying chemical cleaning method to remove trace elements from coal was examined. The hydrothermal reaction with CaO followed by HCl washing was carried out for three different coals. Most of the mineral matter was removed by this treatment, except a small amount of clay and pyrite. The removal percentage of trace elements was generally lower in comparison with that of mineral matter. This is because a substantial portion of trace elements is associated with organic matter or mineral matter that could not be removed by this treatment.

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Section: Resultsmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effectiveness of Hydrothermal Treatment of Coal with Lime for Removal of Trace Elements

et al. 2002

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“…In addition, the PIXE analysis allowed verification of elemental concentrations of analytes that were obtained in both analytical procedures. A detailed description of the PIXE facility can be found in Blanchard et al (1997). Briefly, protons enter the target chamber by passing through a 7-µm thick Kapton window and X-rays exit through a 2.5-µm thick Mylar window at 45E relative to the beam.…”

Section: Analytical Proceduresmentioning

confidence: 99%

Distinct Chemical Patterns in Late Mississippian Caborn-Welborn Ceramics of the Lower Ohio River Valley

Shergur

Popelka

Robertson

et al. 2003

North American Archaeologist

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Trace element analysis was conducted on ceramics from Mississippian Caborn-Welborn sites located in the lower Ohio River Valley. Elemental concentrations were measured for each sherd using both neutron activation analysis (NAA) and particle-induced X-ray emission (PIXE). By using principal components analysis and posterior discriminant analysis, it was possible to compositionally distinguish lower Ohio Valley ceramics from ceramic samples collected from archaeological sites located in the southeastern part of the United States. Similar statistical analyses applied to an examination of the elemental composition of Caborn-Welborn ceramics and their distribution within the Caborn-Welborn region documented minimal variation between the samples based on either site location or ceramic type. Ceramics classified as Caborn-Welborn as well as central Mississippi Valley types and Oneota-like sherds recovered from Caborn-Welborn sites appear to have been locally produced from similar clays. However, the clays used to produce ceramic vessels differed from those used as daub on house walls.

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Leaching of various metals from coal into aqueous solutions containing an acid or a chelating agent

Ohki

Nakajima

Yamashita

et al. 2004

Fuel Processing Technology

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PIXE analysis of the hydrothermal leaching of trace elements in coal

Cited by 10 publications

References 4 publications

Effectiveness of Hydrothermal Treatment of Coal with Lime for Removal of Trace Elements

Effectiveness of Hydrothermal Treatment of Coal with Lime for Removal of Trace Elements

Distinct Chemical Patterns in Late Mississippian Caborn-Welborn Ceramics of the Lower Ohio River Valley

Leaching of various metals from coal into aqueous solutions containing an acid or a chelating agent

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