In:
Journal of the Serbian Chemical Society, National Library of Serbia, Vol. 81, No. 4 ( 2016), p. 403-417
Abstract:
This paper presents the extraction of major and trace elements from a coal
sample, in deionized water, by using three different extraction techniques.
Rotary mixing and ultrasonic extraction were examined for different
extraction times, while the microwave assisted extraction was performed at
different temperatures. Metal concentrations (Na, K, Ca, Mg, Al, Fe, Mn, Be,
Cd, Co, Cr, Hg, As, Ni, Se, Sb and Pb) in a solution were determined by
employing the inductively coupled plasma atomic emission spectrometry;
whereas the results obtained for Na, K, Ca and Mg were compared employing ion
chromatography. Comparing the rotary and ultrasonic-assisted extraction it is
shown that the former is more efficient for the determination of Fe, Na and
Pb, whereas the latter one has proven more efficient for the determination of
Co and Cr ions. Microwave-assisted extraction has proven the most efficient
method for any elements tested in coal. In addition, sequential extraction of
elements was done using microwave digestion. The results of sequential
extraction experiments indicated associations of investigated elements with a
mineral phase and organic matrix. Sequential extraction provided information
on possible leaching of As, Cd, Co, Cr, Ni, Pb, Fe and Mn in environmental
conditions.
Type of Medium:
Online Resource
ISSN:
0352-5139
,
1820-7421
DOI:
10.2298/JSC150429078T
Language:
English
Publisher:
National Library of Serbia
Publication Date:
2016
detail.hit.zdb_id:
2030173-X
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