The reduction of iron(III) by natural humic acid (NHA) was studied in aqueous solution as a function of pH, time and iron(III) concentration. The information gained from FTIR and ESR spectroscopies as well as potentiometric data suggests that redox reactions occur at a low pH due to the involvement of phenolic groups and radicals. At pH values higher than 3.5 the reaction is strongly inhibited by the formation of iron(III)-humate complexes.

The reduction of iron(III) by natural humic acid (NHA) was studied in aqueous solution as a function of pH, time and iron(III) concentration. The information gained from FTIR and ESR spectroscopies as well as potentiometric data suggests that redox reactions occur at a low pH due to the involvement of phenolic groups and radicals. At pH values higher than 3.5 the reaction is strongly inhibited by the formation of iron(III)-humate complexes.

IRON(III) REDUCTION BY NATURAL HUMIC ACIDS - A POTENTIOMETRIC AND SPECTROSCOPIC STUDY / Deiana, Salvatore Andrea; Gessa, C; Manunza, B; Rausa, R; Solinas, V.. - In: EUROPEAN JOURNAL OF SOIL SCIENCE. - ISSN 1351-0754. - 46:1(1995), pp. 103-108.

IRON(III) REDUCTION BY NATURAL HUMIC ACIDS - A POTENTIOMETRIC AND SPECTROSCOPIC STUDY

DEIANA, Salvatore Andrea;MANUNZA B;
1995

Abstract

The reduction of iron(III) by natural humic acid (NHA) was studied in aqueous solution as a function of pH, time and iron(III) concentration. The information gained from FTIR and ESR spectroscopies as well as potentiometric data suggests that redox reactions occur at a low pH due to the involvement of phenolic groups and radicals. At pH values higher than 3.5 the reaction is strongly inhibited by the formation of iron(III)-humate complexes.
The reduction of iron(III) by natural humic acid (NHA) was studied in aqueous solution as a function of pH, time and iron(III) concentration. The information gained from FTIR and ESR spectroscopies as well as potentiometric data suggests that redox reactions occur at a low pH due to the involvement of phenolic groups and radicals. At pH values higher than 3.5 the reaction is strongly inhibited by the formation of iron(III)-humate complexes.
IRON(III) REDUCTION BY NATURAL HUMIC ACIDS - A POTENTIOMETRIC AND SPECTROSCOPIC STUDY / Deiana, Salvatore Andrea; Gessa, C; Manunza, B; Rausa, R; Solinas, V.. - In: EUROPEAN JOURNAL OF SOIL SCIENCE. - ISSN 1351-0754. - 46:1(1995), pp. 103-108.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/85291
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