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Reactivity of Phenolic Acids in Soil and Formation of Oxidation Products
Author(s) -
Lehmann R. G.,
Cheng H. H.
Publication year - 1988
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1988.03615995005200050017x
Subject(s) - chemistry , reactivity (psychology) , soil water , hydrolysis , alkaline hydrolysis , ferulic acid , organic chemistry , polymerization , mass spectrometry , phenolic acid , environmental chemistry , chromatography , polymer , antioxidant , medicine , environmental science , alternative medicine , pathology , soil science
Phenolic acids were shown to be oxidized rapidly in the presence of MnO 2 to form a number of soluble products which were detectable by high pressure liquid chromatography. Some of the oxidation products have higher molecular weights than the parent compounds as shown by mass spectrometry; however, no significant products of polymerization were detected. Tests with ferulic acid showed that these oxidized products were rapidly sorbed to MnO 2 surfaces and became less extractable by acidified organic solvents except after acid or alkaline hydrolysis treatment. Reactions of the phenolic acids with a variety of soils demonstrated that similar oxidation reactions could also occur in natural soils, the extent of which appears, however, to be affected by the nature of soil organic matter on the soil mineral surfaces.