Abstract
In the present study, the humic acid isolated from coals of two coalfields of Nagaland, India has been characterized by Ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD), thermal analysis (TGA-DTA), and scanning electron microscopy (SEM) in relation to their origin. The humic acid reveals a high degree of humification with predominantly aromatic content, which is considered to be type-A humic acid.
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Das, T., Saikia, B.K., Baruah, B.P. et al. Characterizations of humic acid isolated from coals of two Nagaland Coalfields of India in relation to their origin. J Geol Soc India 86, 468–474 (2015). https://doi.org/10.1007/s12594-015-0334-0
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DOI: https://doi.org/10.1007/s12594-015-0334-0