Characterization of coal-based fulvic acid and the construction of a fulvic acid molecular model.

ABSTRACT: Fulvic acid (FA) is important in modern agriculture, ecological restoration, life science, and medicine. The precise characterization of the composition and molecular structure of FA has become a key scientific issue in both basic and applied research. In this study, coal-based FA was separated by microwave-assisted oxygenation from lignite originating from Inner Mongolia in China. Through elemental analysis, infrared spectroscopy, nuclear magnetic resonance spectroscopy, classical quantitative titration experiments, and quantum chemistry combined with software analysis, the representative microscopic molecular structure of FA was determined. The results show that coal-based FA mainly contains three kinds of benzene ring substituents, ether bonds, hydrogen bonds, carbonyl groups, hydroxyl

SUBMITTER: Gong GQ 

PROVIDER: S-EPMC9049418 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature