Abstract
Fulvic acids, humic acids and humins, isolated from two closely situated peat and lignite deposits, have been examined by solid-state 13C n.m.r. and analytical pyrolysis. No marked structural differences were found between the humic fractions from the various deposits, suggesting a common origin. Within each deposit some distinguishing structural characteristics were observed between the humic fractions. The differences observed showed that the loss of carbohydrate and lignin during the early coalification process led to the accumulation of a predominantly polyalkyl, kerogen-like residue. The humin fractions from both materials contain the greatest amounts of aromatic structures, although they also present high proportions of aliphatic components. Thus, their n.m.r. spectra consist almost exclusively of alkyl and aromatic hydrocarbon entities. This agreed with the results of pyrolysis, which reflected the presence in humins of condensed alkyl material.
Submitted Version (
Free)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call