The structural and surface properties of natural and modified coal gangue.

Authors :: Jabłońska B
Kityk AV
Busch M
Huber P
Source :: Journal of environmental management [J Environ Manage] 2017 Apr 01; Vol. 190, pp. 80-90. Date of Electronic Publication: 2016 Dec 29.
Publication Year :: 2017
Abstract: 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 H <subscript>2</subscript> NO <subscript>3</subscript> and H <subscript>2</subscript> O <subscript>2</subscript> 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.<br /> (Copyright © 2016 Elsevier Ltd. All rights reserved.)