Jabłońska Beata, Kityk Andriy V, Busch Mark, Huber Patrick
Czestochowa University of Technology, Faculty of Infrastructure and Environment, Institute of Environmental Engineering, Brzeźnicka St. 60a, 42-200 Częstochowa, Poland.
Czestochowa University of Technology, Faculty of Electrical Engineering, Al. Armii Krajowej 17, 42-200 Częstochowa, Poland.
J Environ Manage. 2017 Apr 1;190:80-90. doi: 10.1016/j.jenvman.2016.12.055. Epub 2016 Dec 29.
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 HNO and HO 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.
本研究考虑了煤矸石作为廉价吸附剂的一种新应用。通过氮气吸附研究了天然煤矸石和改性煤矸石的结构和表面性质。研究了四种类型的样品：天然煤矸石、用HNO₃和H₂O₂改性并在250℃和600℃下煅烧的煤矸石。使用各种方法测定了样品的比表面积和孔隙率。原料主要是中孔的，比表面积相对较小。化学改性增大了总孔体积和比表面积。250℃煅烧使孔体积略有增大，比表面积降低，但结构性质没有显著变化。600℃煅烧导致孔体积显著增加，比表面积减小。这些结果表明，这里研究的煤矸石可作为工业废水预处理中的廉价吸附剂。
