Major structures
Article Abstract:
The strong-acid properties of fulvic acid from the Suwannee River, GA, were traced to polycarboxylic alpha-ether and alpha-ester groups. Strong-acid properties occur only if these groups are in ring structures with two to three additional electronegative groups such as ketone, ester and carboxyl groups in adjacent positions on the ring. The polycarboxylic alpha-ether and alpha-ester structures may also account for the amphiphilic and binding characteristics of fulvic acid.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Minor structures
Article Abstract:
Various tests were conducted to identify the structures responsible for the strong-acid characteristics of fulvic acid from the Suwannee River, GA. The results showed that keto acid and aromatic carboxyl-group structures account for 43% of the strong-acid characteristics of fulvic acid. The remaining 57% of strong-acid characteristics is due to aliphatic carboxyl groups in complex and unusual configurations that cannot be described using existing model compound data.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Model for humus in soils and sediments
Article Abstract:
Humus is an important factor in controlling the physical and chemical characteristics of soil. Although it only comprises a small percentage of the total mass of soil, the amount of humus determines the buffering capacity, metal binding capacity, sorption of hydrophobic organic compounds and soil particle stability. Humus is produced by the partial degradation of plant and animal molecules.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
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