Characterization of eluted metal ions by sequential extraction from Krepoljin coal basin, Serbia: Mechanisms of metal interaction
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.
Keywords:
Heavy metals / humic substances / Krepoljin brown coal / sequential extractionSource:
Energy Sources, Part A: Recovery, Utilization and Environmental Effects, 2016, 38, 13, 1912-1917Publisher:
- Taylor & Francis Inc, Philadelphia
Funding / projects:
- Geohemijska ispitivanja u funkciji pronalaženja novih ležišta fosilnih goriva i zaštite životne sredine (RS-146008)
DOI: 10.1080/15567036.2014.975297
ISSN: 1556-7036
WoS: 000381025200010
Scopus: 2-s2.0-84978208253
Collections
Institution/Community
IHTMTY - JOUR AU - Dević, Gordana PY - 2016 UR - https://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", 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. in 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. in Energy Sources, Part A: Recovery, Utilization and Environmental Effects. 2016;38(13):1912-1917. doi:10.1080/15567036.2014.975297 .
Dević, Gordana, "Characterization of eluted metal ions by sequential extraction from Krepoljin coal basin, Serbia: Mechanisms of metal interaction" in Energy Sources, Part A: Recovery, Utilization and Environmental Effects, 38, no. 13 (2016):1912-1917, https://doi.org/10.1080/15567036.2014.975297 . .