Critical evaluation of sequential extraction and sink-float methods used for the determination of Ga and Ge affinity in lignite

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dc.contributor.author Klika, Zdeněk
dc.contributor.author Ambružová, Lenka
dc.contributor.author Sýkorová, Ivana
dc.contributor.author Seidlerová, Jana
dc.contributor.author Kolomazník, Ivan
dc.date.accessioned 2009-09-22T13:21:26Z
dc.date.available 2009-09-22T13:21:26Z
dc.date.issued 2009
dc.identifier.citation Fuel. 2009, vol. 88, no. 10, p. 1834-1841. en
dc.identifier.issn 0016-2361
dc.identifier.uri http://hdl.handle.net/10084/76026
dc.description.abstract The affinities of Ga and Ge in lignite were determined using sequential extraction (SE) and element affinity calculation (EAC) based on sink-float data. For this study a bulk lignite sample was fractioned into two sets. The first set of samples (A) consisted of the different grain sizes fractions; the second one set (B) was prepared by density fractionation. Sequential extractions [1] were performed on both sets of fractions with very good agreement between determined organic elements affinities (OEA of Ga evaluated from A data is 32%, from B data 35%; OEA of Ge evaluated from A data is 31% and from B data 26%). The data of B lignite fractions were evaluated using two element affinity calculations: (a) EAC (I) of Klika and Kolomazník [2] and b) newly prepared subroutine EAC (II) based on quantitative contents of lignite macerals and minerals. There was also good agreement between both methods obtained (OEA of Ga calculated by EAC (I) is 83% and by EAC (II) 77%; OEA of Ge calculated by EAC (I) is 89% and by EAC (II) 97%). The significant differences of organic elements affinities of Ga and Ge evaluated by sequential extraction and by element affinity calculation based on sink-float data are discussed. en
dc.language.iso en en
dc.publisher Elsevier en
dc.relation.ispartofseries Fuel en
dc.relation.uri http://dx.doi.org/10.1016/j.fuel.2009.04.028 en
dc.subject Ga en
dc.subject Ge en
dc.subject sequential extraction en
dc.subject density fractionation en
dc.subject organic and inorganic affinity en
dc.title Critical evaluation of sequential extraction and sink-float methods used for the determination of Ga and Ge affinity in lignite en
dc.type Article en
dc.identifier.location Není ve fondu ÚK en
dc.identifier.doi 10.1016/j.fuel.2009.04.028
dc.identifier.wos 000268164800005

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