Evaluation of Microporosity in Steam Activated Brown Coal Humic Acids Chars

1991 ◽  
pp. 357-366 ◽  
Author(s):  
T. Siemieniewska ◽  
K. Tomkow ◽  
J. Kaczmarczyk ◽  
A. Albiniak ◽  
Y. Grillet ◽  
...  
Keyword(s):  
Humic Acids ◽  
Brown Coal

scholarly journals The effect of fertilization with brown coal on Haplic Luvisol humic acids

2011 ◽  
Vol 48 (No. 1) ◽  
pp. 33-39 ◽  
Author(s):  
B. Dębska ◽  
A. Maciejewska ◽  
J. Kwiatkowska
Keyword(s):  
Thermal Decomposition ◽  
Elemental Composition ◽  
Humic Acids ◽  
Brown Coal ◽  
Decomposition Process ◽  
Lower Content

The influence of fertilization with brown coal (used as preparation called Rekulter) on properties of humic acids extracted from haplic luvisol was studied. Characteristics of humic acids were identified by their elemental composition, thermal decomposition, and infrared and UV-VIS spectra. It was found that humic acids formed during decomposition process of Rekulter in soil were characterised by a higher content of carbon (38.6% versus 35.4%), a lower content of nitrogen (1.50% versus 2.73%) and a higher resistance to thermal decomposition, when compared with humic acids extracted from soils without Rekulter application. Due to special properties of Rekulter, additional liming did not affect the properties of humic acids.

Mechanochemical Solid-Phase Reactions of Humic Acids from Brown Coal with Sodium Percarbonate

2018 ◽  
Vol 52 (6) ◽  
pp. 356-360 ◽  
Author(s):  
T. S. Skripkina ◽  
A. L. Bychkov ◽  
V. D. Tikhova ◽  
O. I. Lomovsky
Keyword(s):  
Humic Acids ◽  
Brown Coal ◽  
Solid Phase ◽  
Sodium Percarbonate ◽  
Solid Phase Reactions

The pore structure of activated chars of brown coal humic acids obtained at increased rate of carbonization

Carbon ◽  
1993 ◽  
Vol 31 (6) ◽  
pp. 871-880 ◽  
Author(s):  
A. Jankowska ◽  
T. Siemieniewska ◽  
K. Tomków ◽  
M. Jasieńko-Hałat ◽  
J. Kaczmarczyk ◽  
...  
Keyword(s):  
Pore Structure ◽  
Humic Acids ◽  
Brown Coal

scholarly journals Concentrating rare earth elements in brown coal humic acids by mechanochemical treatment

RSC Advances ◽  
2021 ◽  
Vol 11 (57) ◽  
pp. 36016-36022
Author(s):  
Tatiana Skripkina ◽  
Margarita Belokozenko ◽  
Svetlana Shatskaya ◽  
Vera Tikhova ◽  
Igor Lomovskiy
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Humic Acids ◽  
Brown Coal ◽  
Mechanochemical Treatment

Mechanochemical oxidation leads to concentration of rare earth elements in soluble humic acids fraction.

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