Eight samples of powdered brown coal (Krepoljin coal basin, Miocene age) were successively extracted by two extractants at room temperature: bidistilled water, Me1, and 2 M MgCl2 solution, Me2. Large amounts of Ni and Zn are leached from the coal deposit by water. On the contrary, no significant amounts of Pb and Cu are washed under normal conditions. Also, the mobility of Zn and Ni especially depends, to a high extent, on ionic strength. It can be assumed that the humic acids co-extracted during water leaching, Me1, and being a highly competitive ligand for metal ions, will act as a disturbing agent in metal speciation procedure in coals. This assumption is supported by the obtained significant correlation between the Me1:Me2 ratio and the humic acid complex stability constants.
Keywords:
Heavy metals / humic substances / Krepoljin brown coal / sequential extraction
Source:
Energy Sources, Part A: Recovery, Utilization and Environmental Effects, 2016, 38, 13, 1912-1917
TY - JOUR
AU - Dević, Gordana
PY - 2016
UR - http://cer.ihtm.bg.ac.rs/handle/123456789/1876
AB - Eight samples of powdered brown coal (Krepoljin coal basin, Miocene age) were successively extracted by two extractants at room temperature: bidistilled water, Me1, and 2 M MgCl2 solution, Me2. Large amounts of Ni and Zn are leached from the coal deposit by water. On the contrary, no significant amounts of Pb and Cu are washed under normal conditions. Also, the mobility of Zn and Ni especially depends, to a high extent, on ionic strength. It can be assumed that the humic acids co-extracted during water leaching, Me1, and being a highly competitive ligand for metal ions, will act as a disturbing agent in metal speciation procedure in coals. This assumption is supported by the obtained significant correlation between the Me1:Me2 ratio and the humic acid complex stability constants.
PB - Taylor & Francis Inc, Philadelphia
T2 - Energy Sources, Part A: Recovery, Utilization and Environmental Effects
T1 - Characterization of eluted metal ions by sequential extraction from Krepoljin coal basin, Serbia: Mechanisms of metal interaction
VL - 38
IS - 13
SP - 1912
EP - 1917
DO - 10.1080/15567036.2014.975297
ER -
@article{
author = "Dević, Gordana",
year = "2016",
url = "http://cer.ihtm.bg.ac.rs/handle/123456789/1876",
abstract = "Eight samples of powdered brown coal (Krepoljin coal basin, Miocene age) were successively extracted by two extractants at room temperature: bidistilled water, Me1, and 2 M MgCl2 solution, Me2. Large amounts of Ni and Zn are leached from the coal deposit by water. On the contrary, no significant amounts of Pb and Cu are washed under normal conditions. Also, the mobility of Zn and Ni especially depends, to a high extent, on ionic strength. It can be assumed that the humic acids co-extracted during water leaching, Me1, and being a highly competitive ligand for metal ions, will act as a disturbing agent in metal speciation procedure in coals. This assumption is supported by the obtained significant correlation between the Me1:Me2 ratio and the humic acid complex stability constants.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Energy Sources, Part A: Recovery, Utilization and Environmental Effects",
title = "Characterization of eluted metal ions by sequential extraction from Krepoljin coal basin, Serbia: Mechanisms of metal interaction",
volume = "38",
number = "13",
pages = "1912-1917",
doi = "10.1080/15567036.2014.975297"
}
Dević, G. (2016). Characterization of eluted metal ions by sequential extraction from Krepoljin coal basin, Serbia: Mechanisms of metal interaction.
Energy Sources, Part A: Recovery, Utilization and Environmental Effects
Taylor & Francis Inc, Philadelphia., 38(13), 1912-1917.
https://doi.org/10.1080/15567036.2014.975297
Dević G. Characterization of eluted metal ions by sequential extraction from Krepoljin coal basin, Serbia: Mechanisms of metal interaction. Energy Sources, Part A: Recovery, Utilization and Environmental Effects. 2016;38(13):1912-1917
Dević Gordana, "Characterization of eluted metal ions by sequential extraction from Krepoljin coal basin, Serbia: Mechanisms of metal interaction" Energy Sources, Part A: Recovery, Utilization and Environmental Effects, 38, no. 13 (2016):1912-1917,
https://doi.org/10.1080/15567036.2014.975297 .
