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The structural and surface properties of natural and modified coal gangue
Publikationstyp
Journal Article
Date Issued
2017
Sprache
English
TORE-URI
Volume
190
Start Page
80
End Page
90
Citation
Journal of Environmental Management (190): 80-90 (2017)
Publisher DOI
Scopus ID
Publisher
Elsevier
A novel application of coal gangue as inexpensive adsorbents is considered in this study. The structural and surface properties of natural and modified gangue were studied via nitrogen adsorption. Four types of samples were studied: natural, modified with H2NO3 and H2O2 and calcined at 250 °C and 600 °C. The specific surface area and porosity of the samples were determined using various methods. The raw material is mainly mesoporous with relatively small specific surface area. The chemical modification enlarged the total pore volume and the specific surface area. The calcination at 250 °C enlarged slightly the pore volume and lowered the specific surface area, but did not cause significant changes in the structural properties. The calcination at 600 °C resulted in a significant increase in pore volume and a decrease in specific surface area. These results suggest that the coal gangue studied here could be used as inexpensive adsorbent in industrial wastewater pretreatment.
Subjects
coal gangue
waste rocks
nitrogen adsorption
porosity
active surface
DDC Class
500: Naturwissenschaften