Humic acids from coals of the North-Bohemian coal field: I. Preparation and characterisation

• Published in: Reactive & functional polymers Vol. 47; no. 2; pp. 101 - 109
• Main Authors: Novák, Jaromı́r, Kozler, Josef, Janoš, Pavel, Čežı́ková, Jiřina, Tokarová, Věnceslava, Madronová, Libuše
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2001; Elsevier Science
• Subjects: Amino acids; Applied sciences; Brown coal; Coal preparation; Electron spin resonance spectroscopy; Exact sciences and technology; Extraction; Filtration; Humic acids; Infrared spectroscopy; Lignin and derivatives; Lignite; Natural polymers; Nuclear magnetic resonance spectroscopy; Physicochemistry of polymers; Precipitation (chemical); Sedimentation; Brown coal; Humic acids; Elementary analysis; Molecular weight distribution; Molecular structure; Chemical composition; Experimental study; Solvent extraction; Humic acid

Humic acids were prepared from young North-Bohemian brown coals using alkaline extraction, sedimentation/filtration and acidic precipitation; membrane separations were applied to refine some preparatives. Samples were characterised by chemical analyses, molecular mass distribution, E4/ E6 coefficien...