Enrichment and Occurrence of Mn in 5-2 Coal from Qinglongsi Coal Mine, Northern Ordos Basin, China.
ACS Omega
; 5(32): 20202-20214, 2020 Aug 18.
Article
in En
| MEDLINE
| ID: mdl-32832773
ABSTRACT
High concentrations of Mn were observed in 5-2 coal (Jurassic age) from Qinglongsi coal mine in the Northern Ordos Basin. To study the occurrence characteristics and sedimentary environment of the 5-2 coal (3.9 m), 22 samples were collected from a mining face. The test result indicates that the 5-2 coal is in low-ash, high-volatile, very low-sulfur, and bituminous rank, with high inertinite content. The minerals in Jurassic 5-2 coal are composed primarily of kaolinite, siderite, calcite, quartz, pyrite, K-feldspar, and fluorapatite. The Mn element is enriched in the upper part of the 5-2 coal seam with an average of 1243.01 µg/g, which is about 17.5 times higher than the average of world hard coal. The concentration level of Mn has a positive correlation with that of Fe2O3 and carbonate minerals. A weak reduction environment of the coal-accumulating swamp may induce the enrichment of Mn, which is mainly carried by siderite in the 5-2 coal.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
ACS Omega
Year:
2020
Document type:
Article
Affiliation country:
China
Publication country:
EEUU
/
ESTADOS UNIDOS
/
ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
/
UNITED STATES OF AMERICA
/
US
/
USA