Chemical oxidation of phenolic acids by soil iron and manganese oxides

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6551692

Lehmann, R G

The oxidation of six phenolic acids by soil Fe and Mn oxides was demonstrated by changes in phenolic acid extractability from soil with time, by production of Fe(II) and soluble Mn from the oxidation reaction, by quantitative recoveries of added phenolic acids from soil pretreated with dithionite-citrate to remove Fe and Mn oxides, and by the reactivity of phenolic acids in the presence of pure Mn and Fe oxides. The reactivities of phenolic acids were associated with the structures of the chemicals. Increasing methoxy substitution on the aromatic ring increased reactivity, and cinnamic acid derivatives were more reactive than benzoic acid derivatives. Oxidation products of /sup 14/C labeled ferulic acid were sorbed to MnO/sub 2/ within minutes and were unextractable by organic solvents unless the mineral was pretreated with 6 M HCl or 0.5 M NaOH. The oxidation rate of ferulic acid by MnO/sub 2/ approached zero after four days even with a surplus of reactants.

• Research Organization: Washington State Univ., Pullman (USA)
• OSTI ID: 6551692
• Country of Publication: United States
• Language: English

Related Subjects

510101 -- Environment
Terrestrial-- Basic Studies-- Radiometric Techniques-- (-1989)
510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AROMATICS
CARBON 14 COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
EXTRACTION
HYDROXY COMPOUNDS
IRON COMPOUNDS
IRON OXIDES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MANGANESE COMPOUNDS
MANGANESE OXIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHENOLS
REMOVAL
SEPARATION PROCESSES
SOIL CHEMISTRY
SOILS
SOLVENT EXTRACTION
TRACER TECHNIQUES
TRANSITION ELEMENT COMPOUNDS